Release version 2.1.0

Don't use `oldtime` feature of chrono

.gitignore

@@ -3,4 +3,6 @@
 **/*.rs.bk
 Cargo.lock
 .vscode
-*.pyc
+*.pyc
+.idea/
+*.swp

.travis.yml

@@ -1,103 +0,0 @@
-# Based on the "trust" template v0.1.2
-# https://github.com/japaric/trust/tree/v0.1.2
-
-dist: trusty
-language: rust
-services: docker
-sudo: required
-
-env:
-  global:
-    - CRATE_NAME=dtparse
-
-matrix:
-  include:
-    # Android
-    - env: TARGET=aarch64-linux-android DISABLE_TESTS=1
-    - env: TARGET=arm-linux-androideabi DISABLE_TESTS=1
-    - env: TARGET=armv7-linux-androideabi DISABLE_TESTS=1
-    - env: TARGET=i686-linux-android DISABLE_TESTS=1
-    - env: TARGET=x86_64-linux-android DISABLE_TESTS=1
-
-    # iOS
-    - env: TARGET=aarch64-apple-ios DISABLE_TESTS=1
-      os: osx
-    - env: TARGET=armv7-apple-ios DISABLE_TESTS=1
-      os: osx
-    - env: TARGET=armv7s-apple-ios DISABLE_TESTS=1
-      os: osx
-    - env: TARGET=i386-apple-ios DISABLE_TESTS=1
-      os: osx
-    - env: TARGET=x86_64-apple-ios DISABLE_TESTS=1
-      os: osx
-
-    # Linux
-    - env: TARGET=aarch64-unknown-linux-gnu
-    - env: TARGET=arm-unknown-linux-gnueabi
-    - env: TARGET=armv7-unknown-linux-gnueabihf
-    - env: TARGET=i686-unknown-linux-gnu
-    - env: TARGET=i686-unknown-linux-musl
-    - env: TARGET=mips-unknown-linux-gnu
-    - env: TARGET=mips64-unknown-linux-gnuabi64
-    - env: TARGET=mips64el-unknown-linux-gnuabi64
-    - env: TARGET=mipsel-unknown-linux-gnu
-    - env: TARGET=powerpc-unknown-linux-gnu
-    - env: TARGET=powerpc64-unknown-linux-gnu
-    - env: TARGET=powerpc64le-unknown-linux-gnu
-    - env: TARGET=s390x-unknown-linux-gnu DISABLE_TESTS=1
-    - env: TARGET=x86_64-unknown-linux-gnu
-    - env: TARGET=x86_64-unknown-linux-musl
-
-    # OSX
-    - env: TARGET=i686-apple-darwin
-      os: osx
-    - env: TARGET=x86_64-apple-darwin
-      os: osx
-
-    # *BSD
-    - env: TARGET=i686-unknown-freebsd DISABLE_TESTS=1
-    - env: TARGET=x86_64-unknown-freebsd DISABLE_TESTS=1
-    - env: TARGET=x86_64-unknown-netbsd DISABLE_TESTS=1
-
-    # Windows
-    - env: TARGET=x86_64-pc-windows-gnu
-
-    # Nightly and Beta
-    - env: TARGET=x86_64-unknown-linux-gnu
-      rust: nightly
-    - env: TARGET=x86_64-apple-darwin
-      os: osx
-      rust: nightly
-    - env: TARGET=x86_64-unknown-linux-gnu
-      rust: beta
-    - env: TARGET=x86_64-apple-darwin
-      os: osx
-      rust: beta
-
-before_install:
-  - set -e
-  - rustup self update
-
-install:
-  - sh ci/install.sh
-  - source ~/.cargo/env || true
-
-script:
-  - bash ci/script.sh
-
-after_script: set +e
-
-cache: cargo
-before_cache:
-  # Travis can't cache files that are not readable by "others"
-  - chmod -R a+r $HOME/.cargo
-
-branches:
-  only:
-    # release tags
-    - /^v\d+\.\d+\.\d+.*$/
-    - master
-
-notifications:
-  email:
-    on_success: never

CHANGELOG.md

@@ -0,0 +1,34 @@
+Version 1.0.3 (2018-09-18)
+==========================
+
+Misc
+----
+
+- Changed the default `parse` function to use a static parser
+
+Version 1.0.2 (2018-08-14)
+==========================
+
+Misc
+----
+
+- Add tests for WASM
+
+Version 1.0.1 (2018-08-11)
+==========================
+
+Bugfixes
+--------
+
+- Fixed an issue with "GMT+3" not being handled correctly
+
+Misc
+----
+
+- Upgrade `lazy_static` and `rust_decimal` dependencies
+
+Version 1.0.0 (2018-08-03)
+==========================
+
+Initial release. Passes all relevant unit tests from Python's
+`dateutil` project.

CONTRIBUTORS.md

@@ -3,4 +3,5 @@ This project benefits from the Rust and open source communities, but most specif
 # Contributors:
 
 - [@messense](https://github.com/messense)
-- [@mjmeehan](https://github.com/mjmeehan)
+- [@mjmeehan](https://github.com/mjmeehan)
+- [@neosilky](https://github.com/neosilky)

Cargo.toml

@@ -1,23 +1,26 @@
 [package]
 name = "dtparse"
-version = "1.0.0"
+version = "2.0.1"
 authors = ["Bradlee Speice <bradlee@speice.io>"]
 description = "A dateutil-compatible timestamp parser for Rust"
 repository = "https://github.com/bspeice/dtparse.git"
 readme = "README.md"
 categories = ["date-and-time"]
 license = "Apache-2.0"
+exclude = ["/*.py"]
 
 [badges]
 travis-ci = { repository = "bspeice/dtparse" }
-appveyor = { repository = "bspeice/dtparse" }
 maintenance = { status = "passively-maintained" }
 
 [lib]
 name = "dtparse"
 
 [dependencies]
-chrono = "0.4"
-lazy_static = "1.0"
-num-traits = "0.2"
-rust_decimal = "0.9"
+chrono = { version = "0.4.24", default-features = false, features = ["clock"] }
+lazy_static = "1.4.0"
+num-traits = "0.2.15"
+rust_decimal = { version = "1.29.1", default-features = false }
+
+[dev-dependencies]
+base64 = "0.21.0"

LICENSE-APACHE

@@ -0,0 +1,202 @@
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README.md

@@ -1,7 +1,5 @@
 # dtparse
 
-[![travisci](https://travis-ci.org/bspeice/dtparse.svg?branch=master)](https://travis-ci.org/bspeice/dtparse)
-[![appveyor](https://ci.appveyor.com/api/projects/status/r4de76tg9utfjva1/branch/master?svg=true)](https://ci.appveyor.com/project/bspeice/dtparse/branch/master)
 [![crates.io](https://img.shields.io/crates/v/dtparse.svg)](https://crates.io/crates/dtparse)
 [![docs.rs](https://docs.rs/dtparse/badge.svg)](https://docs.rs/dtparse/)
 
@@ -65,5 +63,11 @@ assert_eq!(
 
 Further examples can be found in the [examples](examples) directory on international usage.
 
+# Usage
+
+`dtparse` requires a minimum Rust version of 1.28 to build, but is tested on Windows, OSX,
+BSD, Linux, and WASM. The build is also compiled against the iOS and Android SDK's, but is not
+tested against them.
+
 [dateutil]: https://github.com/dateutil/dateutil
 [examples]: https://github.com/bspeice/dtparse/tree/master/examples

appveyor.yml

@@ -1,121 +0,0 @@
-# Appveyor configuration template for Rust using rustup for Rust installation
-# https://github.com/starkat99/appveyor-rust
-
-## Operating System (VM environment) ##
-
-# Rust needs at least Visual Studio 2013 Appveyor OS for MSVC targets.
-os: Visual Studio 2017
-
-## Build Matrix ##
-
-# This configuration will setup a build for each channel & target combination (12 windows
-# combinations in all).
-#
-# There are 3 channels: stable, beta, and nightly.
-#
-# Alternatively, the full version may be specified for the channel to build using that specific
-# version (e.g. channel: 1.5.0)
-#
-# The values for target are the set of windows Rust build targets. Each value is of the form
-#
-# ARCH-pc-windows-TOOLCHAIN
-#
-# Where ARCH is the target architecture, either x86_64 or i686, and TOOLCHAIN is the linker
-# toolchain to use, either msvc or gnu. See https://www.rust-lang.org/downloads.html#win-foot for
-# a description of the toolchain differences.
-# See https://github.com/rust-lang-nursery/rustup.rs/#toolchain-specification for description of
-# toolchains and host triples.
-#
-# Comment out channel/target combos you do not wish to build in CI.
-#
-# You may use the `cargoflags` and `RUSTFLAGS` variables to set additional flags for cargo commands
-# and rustc, respectively. For instance, you can uncomment the cargoflags lines in the nightly
-# channels to enable unstable features when building for nightly. Or you could add additional
-# matrix entries to test different combinations of features.
-environment:
-  matrix:
-
-### MSVC Toolchains ###
-
-  # Stable 64-bit MSVC
-    - channel: stable
-      target: x86_64-pc-windows-msvc
-  # Stable 32-bit MSVC
-    - channel: stable
-      target: i686-pc-windows-msvc
-  # Beta 64-bit MSVC
-    - channel: beta
-      target: x86_64-pc-windows-msvc
-  # Beta 32-bit MSVC
-    - channel: beta
-      target: i686-pc-windows-msvc
-  # Nightly 64-bit MSVC
-    - channel: nightly
-      target: x86_64-pc-windows-msvc
-      #cargoflags: --features "unstable"
-  # Nightly 32-bit MSVC
-    - channel: nightly
-      target: i686-pc-windows-msvc
-      #cargoflags: --features "unstable"
-
-### GNU Toolchains ###
-
-  # Stable 64-bit GNU
-    - channel: stable
-      target: x86_64-pc-windows-gnu
-  # Stable 32-bit GNU
-    - channel: stable
-      target: i686-pc-windows-gnu
-  # Beta 64-bit GNU
-    - channel: beta
-      target: x86_64-pc-windows-gnu
-  # Beta 32-bit GNU
-    - channel: beta
-      target: i686-pc-windows-gnu
-  # Nightly 64-bit GNU
-    - channel: nightly
-      target: x86_64-pc-windows-gnu
-      #cargoflags: --features "unstable"
-  # Nightly 32-bit GNU
-    - channel: nightly
-      target: i686-pc-windows-gnu
-      #cargoflags: --features "unstable"
-
-### Allowed failures ###
-
-# See Appveyor documentation for specific details. In short, place any channel or targets you wish
-# to allow build failures on (usually nightly at least is a wise choice). This will prevent a build
-# or test failure in the matching channels/targets from failing the entire build.
-matrix:
-  allow_failures:
-    - channel: nightly
-
-# If you only care about stable channel build failures, uncomment the following line:
-    #- channel: beta
-
-## Install Script ##
-
-# This is the most important part of the Appveyor configuration. This installs the version of Rust
-# specified by the 'channel' and 'target' environment variables from the build matrix. This uses
-# rustup to install Rust.
-#
-# For simple configurations, instead of using the build matrix, you can simply set the
-# default-toolchain and default-host manually here.
-install:
-  - appveyor DownloadFile https://win.rustup.rs/ -FileName rustup-init.exe
-  - rustup-init -yv --default-toolchain %channel% --default-host %target%
-  - set PATH=%PATH%;%USERPROFILE%\.cargo\bin
-  - rustc -vV
-  - cargo -vV
-
-## Build Script ##
-
-# 'cargo test' takes care of building for us, so disable Appveyor's build stage. This prevents
-# the "directory does not contain a project or solution file" error.
-build: false
-
-# Uses 'cargo test' to run tests and build. Alternatively, the project may call compiled programs
-#directly or perform other testing commands. Rust will automatically be placed in the PATH
-# environment variable.
-test_script:
-- cargo test --verbose %cargoflags%

build_pycompat.py

@@ -1,4 +1,6 @@
+#!/usr/bin/python3
 from dateutil.parser import parse
+from dateutil.tz import tzutc
 from datetime import datetime
 
 tests = {
@@ -48,7 +50,9 @@ tests = {
     'test_parse_offset': [
         'Thu, 25 Sep 2003 10:49:41 -0300', '2003-09-25T10:49:41.5-03:00',
         '2003-09-25T10:49:41-03:00', '20030925T104941.5-0300',
-        '20030925T104941-0300'
+        '20030925T104941-0300',
+        # dtparse-specific
+        "2018-08-10 10:00:00 UTC+3", "2018-08-10 03:36:47 PM GMT-4", "2018-08-10 04:15:00 AM Z-02:00"
     ],
     'test_parse_dayfirst': [
         '10-09-2003', '10.09.2003', '10/09/2003', '10 09 2003',
@@ -77,7 +81,7 @@ tests = {
         'Thu Sep 25 10:36:28 BRST 2003', '1996.07.10 AD at 15:08:56 PDT',
         'Tuesday, April 12, 1952 AD 3:30:42pm PST',
         'November 5, 1994, 8:15:30 am EST', '1994-11-05T08:15:30-05:00',
-        '1994-11-05T08:15:30Z', '1976-07-04T00:01:02Z',
+        '1994-11-05T08:15:30Z', '1976-07-04T00:01:02Z', '1986-07-05T08:15:30z',
         'Tue Apr 4 00:22:12 PDT 1995'
     ],
     'test_fuzzy_tzinfo': [
@@ -229,7 +233,7 @@ fn parse_and_assert(
     tzinfos: &HashMap<String, i32>,
 ) {
 
-    let mut parser = Parser::new(info);
+    let parser = Parser::new(info);
     let rs_parsed = parser.parse(
         s,
         dayfirst,
@@ -279,7 +283,7 @@ fn parse_fuzzy_and_assert(
     tzinfos: &HashMap<String, i32>,
 ) {
 
-    let mut parser = Parser::new(info);
+    let parser = Parser::new(info);
     let rs_parsed = parser.parse(
         s,
         dayfirst,
@@ -313,7 +317,7 @@ TEST_PARSE_DEFAULT = '''
 #[test]
 fn test_parse_default{i}() {{
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {{
         year: {d.year}, month: {d.month}, day: {d.day},
         hour: {d.hour}, minute: {d.minute}, second: {d.second},
@@ -403,7 +407,7 @@ TEST_UNSPECIFIED_FALLBACK = '''
 #[test]
 fn test_unspecified_fallback{i}() {{
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2010, 1, 31).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2010, 1, 31).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {{
         year: {d.year}, month: {d.month}, day: {d.day},
         hour: {d.hour}, minute: {d.minute}, second: {d.second},
@@ -431,7 +435,7 @@ TEST_PARSE_DEFAULT_IGNORE = '''
 #[ignore]
 fn test_parse_default_ignore{i}() {{
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {{
         year: {d.year}, month: {d.month}, day: {d.day},
         hour: {d.hour}, minute: {d.minute}, second: {d.second},

build_pycompat_tokenizer.py

@@ -1,3 +1,4 @@
+#!/usr/bin/python3
 from dateutil.parser import _timelex
 
 from build_pycompat import tests

ci/install.sh

@@ -1,47 +0,0 @@
-set -ex
-
-main() {
-    local target=
-    if [ $TRAVIS_OS_NAME = linux ]; then
-        target=x86_64-unknown-linux-musl
-        sort=sort
-    else
-        target=x86_64-apple-darwin
-        sort=gsort  # for `sort --sort-version`, from brew's coreutils.
-    fi
-
-    # Builds for iOS are done on OSX, but require the specific target to be
-    # installed.
-    case $TARGET in
-        aarch64-apple-ios)
-            rustup target install aarch64-apple-ios
-            ;;
-        armv7-apple-ios)
-            rustup target install armv7-apple-ios
-            ;;
-        armv7s-apple-ios)
-            rustup target install armv7s-apple-ios
-            ;;
-        i386-apple-ios)
-            rustup target install i386-apple-ios
-            ;;
-        x86_64-apple-ios)
-            rustup target install x86_64-apple-ios
-            ;;
-    esac
-
-    # This fetches latest stable release
-    local tag=$(git ls-remote --tags --refs --exit-code https://github.com/japaric/cross \
-                       | cut -d/ -f3 \
-                       | grep -E '^v[0.1.0-9.]+$' \
-                       | $sort --version-sort \
-                       | tail -n1)
-    curl -LSfs https://japaric.github.io/trust/install.sh | \
-        sh -s -- \
-           --force \
-           --git japaric/cross \
-           --tag $tag \
-           --target $target
-}
-
-main

ci/script.sh

@@ -1,20 +0,0 @@
-# This script takes care of testing your crate
-
-set -ex
-
-main() {
-    cross build --target $TARGET
-    cross build --target $TARGET --release
-
-    if [ ! -z $DISABLE_TESTS ]; then
-        return
-    fi
-
-    cross test --target $TARGET
-    cross test --target $TARGET --release
-}
-
-# we don't run the "test phase" when doing deploys
-if [ -z $TRAVIS_TAG ]; then
-    main
-fi

examples/russian.rs

@@ -8,7 +8,6 @@ use dtparse::ParserInfo;
 use std::collections::HashMap;
 
 fn main() {
-
     // In this example, we'll just swap the default "months" parameter
     // with a version in Russian. Lovingly taken from:
     // https://github.com/dateutil/dateutil/blob/99f5770e7c63aa049b28abe465d7f1cc25b63fd2/dateutil/test/test_parser.py#L244
@@ -26,14 +25,24 @@ fn main() {
         vec!["сен", "Сентябрь"],
         vec!["окт", "Октябрь"],
         vec!["ноя", "Ноябрь"],
-        vec!["дек", "Декабрь"]
+        vec!["дек", "Декабрь"],
     ]);
 
-    let mut p = Parser::new(info);
+    let p = Parser::new(info);
 
     assert_eq!(
-        p.parse("10 Сентябрь 2015 10:20", None, None, false, false, None, false, &HashMap::new())
-            .unwrap().0,
-        NaiveDate::from_ymd(2015, 9, 10).and_hms(10, 20, 0)
+        p.parse(
+            "10 Сентябрь 2015 10:20",
+            None,
+            None,
+            false,
+            false,
+            None,
+            false,
+            &HashMap::new()
+        )
+        .unwrap()
+        .0,
+        NaiveDate::from_ymd_opt(2015, 9, 10).unwrap().and_hms_opt(10, 20, 0).unwrap()
     );
-}
+}

src/lib.rs

@@ -1,26 +1,27 @@
 #![deny(missing_docs)]
+#![cfg_attr(test, allow(unknown_lints))]
 #![cfg_attr(test, deny(warnings))]
 
 //! # dtparse
 //! The fully-featured "even I couldn't understand that" time parser.
 //! Designed to take in strings and give back sensible dates and times.
-//! 
+//!
 //! dtparse has its foundations in the [`dateutil`](dateutil) library for
 //! Python, which excels at taking "interesting" strings and trying to make
 //! sense of the dates and times they contain. A couple of quick examples
 //! from the test cases should give some context:
-//! 
-//! ```rust
+//!
+//! ```rust,ignore (tests-dont-compile-on-old-rust)
 //! # extern crate chrono;
 //! # extern crate dtparse;
 //! use chrono::prelude::*;
 //! use dtparse::parse;
-//! 
+//!
 //! assert_eq!(
 //!     parse("2008.12.30"),
 //!     Ok((NaiveDate::from_ymd(2008, 12, 30).and_hms(0, 0, 0), None))
 //! );
-//! 
+//!
 //! // It can even handle timezones!
 //! assert_eq!(
 //!     parse("January 4, 2024; 18:30:04 +02:00"),
@@ -30,17 +31,17 @@
 //!     ))
 //! );
 //! ```
-//! 
+//!
 //! And we can even handle fuzzy strings where dates/times aren't the
 //! only content if we dig into the implementation a bit!
-//! 
-//! ```rust
+//!
+//! ```rust,ignore (tests-dont-compile-on-old-rust)
 //! # extern crate chrono;
 //! # extern crate dtparse;
 //! use chrono::prelude::*;
 //! use dtparse::Parser;
 //! # use std::collections::HashMap;
-//! 
+//!
 //! let mut p = Parser::default();
 //! assert_eq!(
 //!     p.parse(
@@ -58,9 +59,15 @@
 //!     ))
 //! );
 //! ```
-//! 
+//!
 //! Further examples can be found in the `examples` directory on international usage.
-//! 
+//!
+//! # Usage
+//!
+//! `dtparse` requires a minimum Rust version of 1.28 to build, but is tested on Windows, OSX,
+//! BSD, Linux, and WASM. The build is also compiled against the iOS and Android SDK's, but is not
+//! tested against them.
+//!
 //! [dateutil]: https://github.com/dateutil/dateutil
 
 #[macro_use]
@@ -70,6 +77,9 @@ extern crate chrono;
 extern crate num_traits;
 extern crate rust_decimal;
 
+#[cfg(test)]
+extern crate base64;
+
 use chrono::Datelike;
 use chrono::Duration;
 use chrono::FixedOffset;
@@ -81,8 +91,10 @@ use chrono::Timelike;
 use num_traits::cast::ToPrimitive;
 use rust_decimal::Decimal;
 use rust_decimal::Error as DecimalError;
-use std::collections::HashMap;
 use std::cmp::min;
+use std::collections::HashMap;
+use std::error::Error;
+use std::fmt;
 use std::num::ParseIntError;
 use std::str::FromStr;
 use std::vec::Vec;
@@ -102,6 +114,7 @@ lazy_static! {
     static ref ONE: Decimal = Decimal::new(1, 0);
     static ref TWENTY_FOUR: Decimal = Decimal::new(24, 0);
     static ref SIXTY: Decimal = Decimal::new(60, 0);
+    static ref DEFAULT_PARSER: Parser = Parser::default();
 }
 
 impl From<DecimalError> for ParseError {
@@ -136,8 +149,18 @@ pub enum ParseError {
     /// Parser unable to make sense of year/month/day parameters in the time string;
     /// please report to maintainer as the timestring likely exposes a bug in implementation
     YearMonthDayError(&'static str),
+    /// Parser unable to find any date/time-related content in the supplied string
+    NoDate,
 }
 
+impl fmt::Display for ParseError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{:?}", self)
+    }
+}
+
+impl Error for ParseError {}
+
 type ParseResult<I> = Result<I, ParseError>;
 
 pub(crate) fn tokenize(parse_string: &str) -> Vec<String> {
@@ -151,12 +174,12 @@ pub fn parse_info(vec: Vec<Vec<&str>>) -> HashMap<String, usize> {
     let mut m = HashMap::new();
 
     if vec.len() == 1 {
-        for (i, val) in vec.get(0).unwrap().into_iter().enumerate() {
+        for (i, val) in vec.get(0).unwrap().iter().enumerate() {
             m.insert(val.to_lowercase(), i);
         }
     } else {
-        for (i, val_vec) in vec.into_iter().enumerate() {
-            for val in val_vec.into_iter() {
+        for (i, val_vec) in vec.iter().enumerate() {
+            for val in val_vec {
                 m.insert(val.to_lowercase(), i);
             }
         }
@@ -166,7 +189,7 @@ pub fn parse_info(vec: Vec<Vec<&str>>) -> HashMap<String, usize> {
 }
 
 /// Container for specific tokens to be recognized during parsing.
-/// 
+///
 /// - `jump`: Values that indicate the end of a token for parsing and can be ignored
 /// - `weekday`: Names of the days of the week
 /// - `months`: Names of the months
@@ -179,7 +202,7 @@ pub fn parse_info(vec: Vec<Vec<&str>>) -> HashMap<String, usize> {
 /// - `yearfirst`: Upon encountering an ambiguous date, treat the first value as the year
 /// - `year`: The current year
 /// - `century`: The first year in the current century
-/// 
+///
 /// Please note that if both `dayfirst` and `yearfirst` are true, years take precedence
 /// and will be parsed as "YDM"
 #[derive(Debug, PartialEq)]
@@ -220,12 +243,10 @@ impl Default for ParserInfo {
         let century = year / 100 * 100;
 
         ParserInfo {
-            jump: parse_info(vec![
-                vec![
-                    " ", ".", ",", ";", "-", "/", "'", "at", "on", "and", "ad", "m", "t", "of",
-                    "st", "nd", "rd", "th",
-                ],
-            ]),
+            jump: parse_info(vec![vec![
+                " ", ".", ",", ";", "-", "/", "'", "at", "on", "and", "ad", "m", "t", "of", "st",
+                "nd", "rd", "th",
+            ]]),
             weekday: parse_info(vec![
                 vec!["Mon", "Monday"],
                 vec!["Tue", "Tues", "Tuesday"],
@@ -260,8 +281,8 @@ impl Default for ParserInfo {
             tzoffset: parse_info(vec![vec![]]),
             dayfirst: false,
             yearfirst: false,
-            year: year,
-            century: century,
+            year,
+            century,
         }
     }
 }
@@ -272,7 +293,7 @@ impl ParserInfo {
     }
 
     fn weekday_index(&self, name: &str) -> Option<usize> {
-        self.weekday.get(&name.to_lowercase()).map(|i| *i)
+        self.weekday.get(&name.to_lowercase()).cloned()
     }
 
     fn month_index(&self, name: &str) -> Option<usize> {
@@ -280,7 +301,7 @@ impl ParserInfo {
     }
 
     fn hms_index(&self, name: &str) -> Option<usize> {
-        self.hms.get(&name.to_lowercase()).map(|i| *i)
+        self.hms.get(&name.to_lowercase()).cloned()
     }
 
     fn ampm_index(&self, name: &str) -> Option<bool> {
@@ -330,10 +351,13 @@ impl ParserInfo {
             res.year = Some(self.convertyear(y, res.century_specified))
         };
 
-        if res.tzoffset == Some(0) && res.tzname.is_none() || res.tzname == Some("Z".to_owned()) {
+        if (res.tzoffset == Some(0) && res.tzname.is_none())
+            || (res.tzname == Some("Z".to_owned()) || res.tzname == Some("z".to_owned()))
+        {
             res.tzname = Some("UTC".to_owned());
             res.tzoffset = Some(0);
-        } else if res.tzoffset != Some(0) && res.tzname.is_some()
+        } else if res.tzoffset != Some(0)
+            && res.tzname.is_some()
             && self.utczone_index(res.tzname.as_ref().unwrap())
         {
             res.tzoffset = Some(0);
@@ -350,16 +374,16 @@ fn days_in_month(year: i32, month: i32) -> Result<u32, ParseError> {
     };
 
     match month {
-        2 => if leap_year {
-            Ok(29)
-        } else {
-            Ok(28)
-        },
+        2 => {
+            if leap_year {
+                Ok(29)
+            } else {
+                Ok(28)
+            }
+        }
         1 | 3 | 5 | 7 | 8 | 10 | 12 => Ok(31),
         4 | 6 | 9 | 11 => Ok(30),
-        _ => {
-            Err(ParseError::ImpossibleTimestamp("Invalid month"))
-        }
+        _ => Err(ParseError::ImpossibleTimestamp("Invalid month")),
     }
 }
 
@@ -413,9 +437,7 @@ impl YMD {
                 Some(YMDLabel::Month) => {
                     return Err(ParseError::ImpossibleTimestamp("Invalid month"))
                 }
-                Some(YMDLabel::Day) => {
-                    return Err(ParseError::ImpossibleTimestamp("Invalid day"))
-                }
+                Some(YMDLabel::Day) => return Err(ParseError::ImpossibleTimestamp("Invalid day")),
             }
         }
 
@@ -427,9 +449,7 @@ impl YMD {
                 Some(YMDLabel::Month) => {
                     return Err(ParseError::ImpossibleTimestamp("Invalid month"))
                 }
-                Some(YMDLabel::Day) => {
-                    return Err(ParseError::ImpossibleTimestamp("Invalid day"))
-                }
+                Some(YMDLabel::Day) => return Err(ParseError::ImpossibleTimestamp("Invalid day")),
             }
         }
 
@@ -477,7 +497,7 @@ impl YMD {
                 YMDLabel::Day
             };
 
-            let strids_vals: Vec<usize> = strids.values().map(|u| u.clone()).collect();
+            let strids_vals: Vec<usize> = strids.values().cloned().collect();
             let missing_val = if !strids_vals.contains(&0) {
                 0
             } else if !strids_vals.contains(&1) {
@@ -490,22 +510,19 @@ impl YMD {
         }
 
         if self._ymd.len() != strids.len() {
-            return Err(ParseError::YearMonthDayError("Tried to resolve year, month, and day without enough information"));
+            return Err(ParseError::YearMonthDayError(
+                "Tried to resolve year, month, and day without enough information",
+            ));
         }
 
         Ok((
-            strids
-                .get(&YMDLabel::Year)
-                .map(|i| self._ymd[*i]),
-            strids
-                .get(&YMDLabel::Month)
-                .map(|i| self._ymd[*i]),
-            strids
-                .get(&YMDLabel::Day)
-                .map(|i| self._ymd[*i]),
+            strids.get(&YMDLabel::Year).map(|i| self._ymd[*i]),
+            strids.get(&YMDLabel::Month).map(|i| self._ymd[*i]),
+            strids.get(&YMDLabel::Day).map(|i| self._ymd[*i]),
         ))
     }
 
+    #[allow(clippy::needless_return)]
     fn resolve_ymd(
         &mut self,
         yearfirst: bool,
@@ -514,28 +531,24 @@ impl YMD {
         let len_ymd = self._ymd.len();
 
         let mut strids: HashMap<YMDLabel, usize> = HashMap::new();
-        self.ystridx
-            .map(|u| strids.insert(YMDLabel::Year, u.clone()));
-        self.mstridx
-            .map(|u| strids.insert(YMDLabel::Month, u.clone()));
-        self.dstridx
-            .map(|u| strids.insert(YMDLabel::Day, u.clone()));
+        self.ystridx.map(|u| strids.insert(YMDLabel::Year, u));
+        self.mstridx.map(|u| strids.insert(YMDLabel::Month, u));
+        self.dstridx.map(|u| strids.insert(YMDLabel::Day, u));
 
         // TODO: More Rustiomatic way of doing this?
-        if len_ymd == strids.len() && strids.len() > 0
-            || (len_ymd == 3 && strids.len() == 2)
-        {
+        if len_ymd == strids.len() && !strids.is_empty() || (len_ymd == 3 && strids.len() == 2) {
             return self.resolve_from_stridxs(&mut strids);
         };
 
         // Received year, month, day, and ???
         if len_ymd > 3 {
-            return Err(ParseError::YearMonthDayError("Received extra tokens in resolving year, month, and day"));
+            return Err(ParseError::YearMonthDayError(
+                "Received extra tokens in resolving year, month, and day",
+            ));
         }
 
         match (len_ymd, self.mstridx) {
-            (1, Some(val)) |
-            (2, Some(val)) => {
+            (1, Some(val)) | (2, Some(val)) => {
                 let other = if len_ymd == 1 {
                     self._ymd[0]
                 } else {
@@ -545,7 +558,7 @@ impl YMD {
                     return Ok((Some(other), Some(self._ymd[val]), None));
                 }
                 return Ok((None, Some(self._ymd[val]), Some(other)));
-            },
+            }
             (2, None) => {
                 if self._ymd[0] > 31 {
                     return Ok((Some(self._ymd[0]), Some(self._ymd[1]), None));
@@ -557,28 +570,29 @@ impl YMD {
                     return Ok((None, Some(self._ymd[1]), Some(self._ymd[0])));
                 }
                 return Ok((None, Some(self._ymd[0]), Some(self._ymd[1])));
-            },
+            }
             (3, Some(0)) => {
                 if self._ymd[1] > 31 {
                     return Ok((Some(self._ymd[1]), Some(self._ymd[0]), Some(self._ymd[2])));
                 }
                 return Ok((Some(self._ymd[2]), Some(self._ymd[0]), Some(self._ymd[1])));
-            },
+            }
             (3, Some(1)) => {
                 if self._ymd[0] > 31 || (yearfirst && self._ymd[2] <= 31) {
                     return Ok((Some(self._ymd[0]), Some(self._ymd[1]), Some(self._ymd[2])));
                 }
                 return Ok((Some(self._ymd[2]), Some(self._ymd[1]), Some(self._ymd[0])));
-            },
+            }
             (3, Some(2)) => {
                 // It was in the original docs, so: WTF!?
                 if self._ymd[1] > 31 {
                     return Ok((Some(self._ymd[2]), Some(self._ymd[1]), Some(self._ymd[0])));
                 }
                 return Ok((Some(self._ymd[0]), Some(self._ymd[2]), Some(self._ymd[1])));
-            },
+            }
             (3, None) => {
-                if self._ymd[0] > 31 || self.ystridx == Some(0)
+                if self._ymd[0] > 31
+                    || self.ystridx == Some(0)
                     || (yearfirst && self._ymd[1] <= 12 && self._ymd[2] <= 31)
                 {
                     if dayfirst && self._ymd[2] <= 12 {
@@ -589,8 +603,10 @@ impl YMD {
                     return Ok((Some(self._ymd[2]), Some(self._ymd[1]), Some(self._ymd[0])));
                 }
                 return Ok((Some(self._ymd[2]), Some(self._ymd[0]), Some(self._ymd[1])));
-            },
-            (_, _) => { return Ok((None, None, None)); },
+            }
+            (_, _) => {
+                return Ok((None, None, None));
+            }
         }
     }
 }
@@ -604,7 +620,7 @@ struct ParsingResult {
     hour: Option<i32>,
     minute: Option<i32>,
     second: Option<i32>,
-    microsecond: Option<i32>,
+    nanosecond: Option<i64>,
     tzname: Option<String>,
     tzoffset: Option<i32>,
     ampm: Option<bool>,
@@ -612,6 +628,31 @@ struct ParsingResult {
     any_unused_tokens: Vec<String>,
 }
 
+macro_rules! option_len {
+    ($o:expr) => {{
+        if $o.is_some() {
+            1
+        } else {
+            0
+        }
+    }};
+}
+
+impl ParsingResult {
+    fn len(&self) -> usize {
+        option_len!(self.year)
+            + option_len!(self.month)
+            + option_len!(self.day)
+            + option_len!(self.weekday)
+            + option_len!(self.hour)
+            + option_len!(self.minute)
+            + option_len!(self.second)
+            + option_len!(self.nanosecond)
+            + option_len!(self.tzname)
+            + option_len!(self.ampm)
+    }
+}
+
 /// Parser is responsible for doing the actual work of understanding a time string.
 /// The root level `parse` function is responsible for constructing a default `Parser`
 /// and triggering its behavior.
@@ -622,7 +663,7 @@ pub struct Parser {
 
 impl Parser {
     /// Create a new `Parser` instance using the provided `ParserInfo`.
-    /// 
+    ///
     /// This method allows you to set up a parser to handle different
     /// names for days of the week, months, etc., enabling customization
     /// for different languages or extra values.
@@ -633,35 +674,36 @@ impl Parser {
     /// Main method to trigger parsing of a string using the previously-provided
     /// parser information. Returns a naive timestamp along with timezone and
     /// unused tokens if available.
-    /// 
+    ///
     /// `dayfirst` and `yearfirst` force parser behavior in the event of ambiguous
     /// dates. Consider the following scenarios where we parse the string '01.02.03'
-    /// 
+    ///
     /// - `dayfirst=Some(true)`, `yearfirst=None`: Results in `February 2, 2003`
     /// - `dayfirst=None`, `yearfirst=Some(true)`: Results in `February 3, 2001`
     /// - `dayfirst=Some(true)`, `yearfirst=Some(true)`: Results in `March 2, 2001`
-    /// 
+    ///
     /// `fuzzy` enables fuzzy parsing mode, allowing the parser to skip tokens if
     /// they are unrecognized. However, the unused tokens will not be returned
     /// unless `fuzzy_with_tokens` is set as `true`.
-    /// 
+    ///
     /// `default` is the timestamp used to infer missing values, and is midnight
     /// of the current day by default. For example, when parsing the text '2003',
     /// we will use the current month and day as a default value, leading to a
     /// result of 'March 3, 2003' if the function was run using a default of
     /// March 3rd.
-    /// 
+    ///
     /// `ignoretz` forces the parser to ignore timezone information even if it
     /// is recognized in the time string
-    /// 
+    ///
     /// `tzinfos` is a map of timezone names to the offset seconds. For example,
     /// the parser would ignore the 'EST' part of the string in '10 AM EST'
     /// unless you added a `tzinfos` map of `{"EST": "14400"}`. Please note that
     /// timezone name support (i.e. "EST", "BRST") is not available by default
     /// at the moment, they must be added through `tzinfos` at the moment in
     /// order to be resolved.
+    #[allow(clippy::too_many_arguments)]
     pub fn parse(
-        &mut self,
+        &self,
         timestr: &str,
         dayfirst: Option<bool>,
         yearfirst: Option<bool>,
@@ -673,11 +715,15 @@ impl Parser {
     ) -> ParseResult<(NaiveDateTime, Option<FixedOffset>, Option<Vec<String>>)> {
         let default_date = default.unwrap_or(&Local::now().naive_local()).date();
 
-        let default_ts = NaiveDateTime::new(default_date, NaiveTime::from_hms(0, 0, 0));
+        let default_ts = NaiveDateTime::new(default_date, NaiveTime::from_hms_opt(0, 0, 0).unwrap());
 
         let (res, tokens) =
             self.parse_with_tokens(timestr, dayfirst, yearfirst, fuzzy, fuzzy_with_tokens)?;
 
+        if res.len() == 0 {
+            return Err(ParseError::NoDate);
+        }
+
         let naive = self.build_naive(&res, &default_ts)?;
 
         if !ignoretz {
@@ -688,8 +734,9 @@ impl Parser {
         }
     }
 
+    #[allow(clippy::cognitive_complexity)] // Imitating Python API is priority
     fn parse_with_tokens(
-        &mut self,
+        &self,
         timestr: &str,
         dayfirst: Option<bool>,
         yearfirst: Option<bool>,
@@ -734,20 +781,22 @@ impl Parser {
                         // Jan-01[-99]
                         let sep = &l[i + 1];
                         // TODO: This seems like a very unsafe unwrap
-                        ymd.append(l[i + 2].parse::<i32>().unwrap(), &l[i + 2], None)?;
+                        ymd.append(l[i + 2].parse::<i32>()?, &l[i + 2], None)?;
 
                         if i + 3 < len_l && &l[i + 3] == sep {
                             // Jan-01-99
-                            ymd.append(l[i + 4].parse::<i32>().unwrap(), &l[i + 4], None)?;
+                            ymd.append(l[i + 4].parse::<i32>()?, &l[i + 4], None)?;
                             i += 2;
                         }
 
                         i += 2;
-                    } else if i + 4 < len_l && l[i + 1] == l[i + 3] && l[i + 3] == " "
+                    } else if i + 4 < len_l
+                        && l[i + 1] == l[i + 3]
+                        && l[i + 3] == " "
                         && self.info.pertain_index(&l[i + 2])
                     {
                         // Jan of 01
-                        if let Some(value) = l[i + 4].parse::<i32>().ok() {
+                        if let Ok(value) = l[i + 4].parse::<i32>() {
                             let year = self.info.convertyear(value, false);
                             ymd.append(year, &l[i + 4], Some(YMDLabel::Year))?;
                         }
@@ -764,7 +813,7 @@ impl Parser {
                 } else if fuzzy {
                     skipped_idxs.push(i);
                 }
-            } else if self.could_be_tzname(res.hour, res.tzname.clone(), res.tzoffset, &l[i]) {
+            } else if self.could_be_tzname(res.hour, &res.tzname, res.tzoffset, &l[i]) {
                 res.tzname = Some(l[i].clone());
 
                 let tzname = res.tzname.clone().unwrap();
@@ -779,10 +828,9 @@ impl Parser {
                     let item = if l[i + 1] == "+" {
                         "-".to_owned()
                     } else {
-                        "-".to_owned()
+                        "+".to_owned()
                     };
-                    l.remove(i + 1);
-                    l.insert(i + 1, item);
+                    l[i + 1] = item;
 
                     res.tzoffset = None;
 
@@ -800,16 +848,17 @@ impl Parser {
                 // TODO: check that l[i + 1] is integer?
                 if len_li == 4 {
                     // -0300
-                    hour_offset = Some(l[i + 1][..2].parse::<i32>().unwrap());
-                    min_offset = Some(l[i + 1][2..4].parse::<i32>().unwrap());
+                    hour_offset = Some(l[i + 1][..2].parse::<i32>()?);
+                    min_offset = Some(l[i + 1][2..4].parse::<i32>()?);
                 } else if i + 2 < len_l && l[i + 2] == ":" {
                     // -03:00
-                    hour_offset = Some(l[i + 1].parse::<i32>().unwrap());
-                    min_offset = Some(l[i + 3].parse::<i32>().unwrap());
+                    hour_offset = Some(l[i + 1].parse::<i32>()?);
+                    min_offset = Some(l[i + 3].parse::<i32>()?);
                     i += 2;
                 } else if len_li <= 2 {
                     // -[0]3
-                    hour_offset = Some(l[i + 1][..2].parse::<i32>().unwrap());
+                    let range_len = min(l[i + 1].len(), 2);
+                    hour_offset = Some(l[i + 1][..range_len].parse::<i32>()?);
                     min_offset = Some(0);
                 }
 
@@ -817,9 +866,12 @@ impl Parser {
                     Some(signal * (hour_offset.unwrap() * 3600 + min_offset.unwrap() * 60));
 
                 let tzname = res.tzname.clone();
-                if i + 5 < len_l && self.info.jump_index(&l[i + 2]) && l[i + 3] == "("
-                    && l[i + 5] == ")" && 3 <= l[i + 4].len()
-                    && self.could_be_tzname(res.hour, tzname, None, &l[i + 4])
+                if i + 5 < len_l
+                    && self.info.jump_index(&l[i + 2])
+                    && l[i + 3] == "("
+                    && l[i + 5] == ")"
+                    && 3 <= l[i + 4].len()
+                    && self.could_be_tzname(res.hour, &tzname, None, &l[i + 4])
                 {
                     // (GMT)
                     res.tzname = Some(l[i + 4].clone());
@@ -856,23 +908,24 @@ impl Parser {
     fn could_be_tzname(
         &self,
         hour: Option<i32>,
-        tzname: Option<String>,
+        tzname: &Option<String>,
         tzoffset: Option<i32>,
         token: &str,
     ) -> bool {
         let all_ascii_upper = token
             .chars()
             .all(|c| 65u8 as char <= c && c <= 90u8 as char);
-        return hour.is_some() && tzname.is_none() && tzoffset.is_none() && token.len() <= 5
-            && all_ascii_upper;
+
+        hour.is_some()
+            && tzname.is_none()
+            && tzoffset.is_none()
+            && token.len() <= 5
+            && (all_ascii_upper || self.info.utczone.contains_key(token))
     }
 
+    #[allow(clippy::unnecessary_unwrap)]
     fn ampm_valid(&self, hour: Option<i32>, ampm: Option<bool>, fuzzy: bool) -> ParseResult<bool> {
-        let mut val_is_ampm = true;
-
-        if fuzzy && ampm.is_some() {
-            val_is_ampm = false;
-        }
+        let mut val_is_ampm = !(fuzzy && ampm.is_some());
 
         if hour.is_none() {
             if fuzzy {
@@ -891,49 +944,58 @@ impl Parser {
         Ok(val_is_ampm)
     }
 
-    fn build_naive(&self, res: &ParsingResult, default: &NaiveDateTime) -> ParseResult<NaiveDateTime> {
-        let y = res.year.unwrap_or(default.year());
-        let m = res.month.unwrap_or(default.month() as i32) as u32;
+    fn build_naive(
+        &self,
+        res: &ParsingResult,
+        default: &NaiveDateTime,
+    ) -> ParseResult<NaiveDateTime> {
+        let y = res.year.unwrap_or_else(|| default.year());
+        let m = res.month.unwrap_or_else(|| default.month() as i32) as u32;
 
         let d_offset = if res.weekday.is_some() && res.day.is_none() {
-            // TODO: Unwrap not justified
-            let dow = day_of_week(y as u32, m, default.day()).unwrap();
+            let dow = day_of_week(y as u32, m, default.day())?;
 
             // UNWRAP: We've already check res.weekday() is some
             let actual_weekday = (res.weekday.unwrap() + 1) % 7;
             let other = DayOfWeek::from_numeral(actual_weekday as u32);
-            Duration::days(dow.difference(other) as i64)
+            Duration::days(i64::from(dow.difference(&other)))
         } else {
             Duration::days(0)
         };
 
         // TODO: Change month/day to u32
-        let d = NaiveDate::from_ymd(
+        let d = NaiveDate::from_ymd_opt(
             y,
             m,
-            min(res.day.unwrap_or(default.day() as i32) as u32, days_in_month(y, m as i32)?)
-        );
+            min(
+                res.day.unwrap_or(default.day() as i32) as u32,
+                days_in_month(y, m as i32)?,
+            ),
+        )
+        .ok_or_else(|| ParseError::ImpossibleTimestamp("Invalid date range given"))?;
 
         let d = d + d_offset;
 
         let hour = res.hour.unwrap_or(default.hour() as i32) as u32;
         let minute = res.minute.unwrap_or(default.minute() as i32) as u32;
         let second = res.second.unwrap_or(default.second() as i32) as u32;
-        let microsecond = res.microsecond
-            .unwrap_or(default.timestamp_subsec_micros() as i32) as u32;
-        let t = NaiveTime::from_hms_micro_opt(hour, minute, second, microsecond).ok_or_else(|| {
-            if hour >= 24 {
-                ParseError::ImpossibleTimestamp("Invalid hour")
-            } else if minute >= 60 {
-                ParseError::ImpossibleTimestamp("Invalid minute")
-            } else if second >= 60 {
-                ParseError::ImpossibleTimestamp("Invalid second")
-            } else if microsecond >= 2_000_000 {
-                ParseError::ImpossibleTimestamp("Invalid microsecond")
-            } else {
-                unreachable!();
-            }
-        })?;
+        let nanosecond = res
+            .nanosecond
+            .unwrap_or(default.timestamp_subsec_nanos() as i64) as u32;
+        let t =
+            NaiveTime::from_hms_nano_opt(hour, minute, second, nanosecond).ok_or_else(|| {
+                if hour >= 24 {
+                    ParseError::ImpossibleTimestamp("Invalid hour")
+                } else if minute >= 60 {
+                    ParseError::ImpossibleTimestamp("Invalid minute")
+                } else if second >= 60 {
+                    ParseError::ImpossibleTimestamp("Invalid second")
+                } else if nanosecond >= 2_000_000_000 {
+                    ParseError::ImpossibleTimestamp("Invalid microsecond")
+                } else {
+                    unreachable!();
+                }
+            })?;
 
         Ok(NaiveDateTime::new(d, t))
     }
@@ -944,30 +1006,31 @@ impl Parser {
         res: &ParsingResult,
         tzinfos: &HashMap<String, i32>,
     ) -> ParseResult<Option<FixedOffset>> {
-        // TODO: Actual timezone support
         if let Some(offset) = res.tzoffset {
-            Ok(Some(FixedOffset::east(offset)))
+            Ok(FixedOffset::east_opt(offset))
         } else if res.tzoffset == None
-            && (res.tzname == Some(" ".to_owned()) || res.tzname == Some(".".to_owned())
-                || res.tzname == Some("-".to_owned()) || res.tzname == None)
+            && (res.tzname == Some(" ".to_owned())
+                || res.tzname == Some(".".to_owned())
+                || res.tzname == Some("-".to_owned())
+                || res.tzname == None)
         {
             Ok(None)
         } else if res.tzname.is_some() && tzinfos.contains_key(res.tzname.as_ref().unwrap()) {
-            Ok(Some(FixedOffset::east(
-                tzinfos.get(res.tzname.as_ref().unwrap()).unwrap().clone(),
-            )))
-        } else if res.tzname.is_some() {
-            // TODO: Dateutil issues a warning/deprecation notice here. Should we force the issue?
-            println!("tzname {} identified but not understood. Ignoring for the time being, but behavior is subject to change.", res.tzname.as_ref().unwrap());
+            Ok(FixedOffset::east_opt(
+                *tzinfos.get(res.tzname.as_ref().unwrap()).unwrap(),
+            ))
+        } else if let Some(tzname) = res.tzname.as_ref() {
+            println!("tzname {} identified but not understood.", tzname);
             Ok(None)
         } else {
             Err(ParseError::TimezoneUnsupported)
         }
     }
 
+    #[allow(clippy::unnecessary_unwrap)]
     fn parse_numeric_token(
         &self,
-        tokens: &Vec<String>,
+        tokens: &[String],
         idx: usize,
         info: &ParserInfo,
         ymd: &mut YMD,
@@ -983,7 +1046,9 @@ impl Parser {
 
         // TODO: I miss the `x in y` syntax
         // TODO: Decompose this logic a bit
-        if ymd.len() == 3 && (len_li == 2 || len_li == 4) && res.hour.is_none()
+        if ymd.len() == 3
+            && (len_li == 2 || len_li == 4)
+            && res.hour.is_none()
             && (idx + 1 >= len_l
                 || (tokens[idx + 1] != ":" && info.hms_index(&tokens[idx + 1]).is_none()))
         {
@@ -994,14 +1059,14 @@ impl Parser {
             if len_li == 4 {
                 res.minute = Some(s[2..4].parse::<i32>()?)
             }
-        } else if len_li == 6 || (len_li > 6 && tokens[idx].find(".") == Some(6)) {
+        } else if len_li == 6 || (len_li > 6 && tokens[idx].find('.') == Some(6)) {
             // YYMMDD or HHMMSS[.ss]
             let s = &tokens[idx];
 
-            if ymd.len() == 0 && tokens[idx].find(".") == None {
-                ymd.append(s[0..2].parse::<i32>().unwrap(), &s[0..2], None)?;
-                ymd.append(s[2..4].parse::<i32>().unwrap(), &s[2..4], None)?;
-                ymd.append(s[4..6].parse::<i32>().unwrap(), &s[4..6], None)?;
+            if ymd.len() == 0 && tokens[idx].find('.') == None {
+                ymd.append(s[0..2].parse::<i32>()?, &s[0..2], None)?;
+                ymd.append(s[2..4].parse::<i32>()?, &s[2..4], None)?;
+                ymd.append(s[4..6].parse::<i32>()?, &s[4..6], None)?;
             } else {
                 // 19990101T235959[.59]
                 res.hour = s[0..2].parse::<i32>().ok();
@@ -1009,14 +1074,14 @@ impl Parser {
 
                 let t = self.parsems(&s[4..])?;
                 res.second = Some(t.0);
-                res.microsecond = Some(t.1);
+                res.nanosecond = Some(t.1);
             }
         } else if vec![8, 12, 14].contains(&len_li) {
             // YYMMDD
             let s = &tokens[idx];
-            ymd.append(s[..4].parse::<i32>().unwrap(), &s[..4], Some(YMDLabel::Year))?;
-            ymd.append(s[4..6].parse::<i32>().unwrap(), &s[4..6], None)?;
-            ymd.append(s[6..8].parse::<i32>().unwrap(), &s[6..8], None)?;
+            ymd.append(s[..4].parse::<i32>()?, &s[..4], Some(YMDLabel::Year))?;
+            ymd.append(s[4..6].parse::<i32>()?, &s[4..6], None)?;
+            ymd.append(s[6..8].parse::<i32>()?, &s[6..8], None)?;
 
             if len_li > 8 {
                 res.hour = Some(s[8..10].parse::<i32>()?);
@@ -1029,9 +1094,8 @@ impl Parser {
         } else if let Some(hms_idx) = self.find_hms_index(idx, tokens, info, true) {
             // HH[ ]h or MM[ ]m or SS[.ss][ ]s
             let (new_idx, hms) = self.parse_hms(idx, tokens, info, Some(hms_idx));
-            if hms.is_some() {
-                // TODO: This unwrap is unjustified.
-                self.assign_hms(res, value_repr, hms.unwrap());
+            if let Some(hms) = hms {
+                self.assign_hms(res, value_repr, hms)?;
             }
             idx = new_idx;
         } else if idx + 2 < len_l && tokens[idx + 1] == ":" {
@@ -1039,7 +1103,7 @@ impl Parser {
             // TODO: Better story around Decimal handling
             res.hour = Some(value.floor().to_i64().unwrap() as i32);
             // TODO: Rescope `value` here?
-            value = self.to_decimal(&tokens[idx + 2]);
+            value = self.to_decimal(&tokens[idx + 2])?;
             let min_sec = self.parse_min_sec(value);
             res.minute = Some(min_sec.0);
             res.second = min_sec.1;
@@ -1048,7 +1112,7 @@ impl Parser {
                 // TODO: (x, y) = (a, b) syntax?
                 let ms = self.parsems(&tokens[idx + 4]).unwrap();
                 res.second = Some(ms.0);
-                res.microsecond = Some(ms.1);
+                res.nanosecond = Some(ms.1);
 
                 idx += 2;
             }
@@ -1058,7 +1122,7 @@ impl Parser {
         {
             // TODO: There's got to be a better way of handling the condition above
             let sep = &tokens[idx + 1];
-            ymd.append(value_repr.parse::<i32>().unwrap(), &value_repr, None)?;
+            ymd.append(value_repr.parse::<i32>()?, &value_repr, None)?;
 
             if idx + 2 < len_l && !info.jump_index(&tokens[idx + 2]) {
                 if let Ok(val) = tokens[idx + 2].parse::<i32>() {
@@ -1068,14 +1132,14 @@ impl Parser {
                 }
 
                 if idx + 3 < len_l && &tokens[idx + 3] == sep {
-                    if let Some(value) = info.month_index(&tokens[idx + 4]) {
+                    if tokens.len() <= idx + 4 {
+                        return Err(ParseError::UnrecognizedFormat);
+                    } else if let Some(value) = info.month_index(&tokens[idx + 4]) {
                         ymd.append(value as i32, &tokens[idx + 4], Some(YMDLabel::Month))?;
+                    } else if let Ok(val) = tokens[idx + 4].parse::<i32>() {
+                        ymd.append(val, &tokens[idx + 4], None)?;
                     } else {
-                        if let Ok(val) = tokens[idx + 4].parse::<i32>() {
-                            ymd.append(val, &tokens[idx + 4], None)?;
-                        } else {
-                            return Err(ParseError::UnrecognizedFormat);
-                        }
+                        return Err(ParseError::UnrecognizedFormat);
                     }
 
                     idx += 2;
@@ -1092,7 +1156,9 @@ impl Parser {
                 res.hour = Some(self.adjust_ampm(hour, ampm));
                 idx += 1;
             } else {
-                ymd.append(value.floor().to_i64().unwrap() as i32, &value_repr, None)?;
+                //let value = value.floor().to_i32().ok_or(Err(ParseError::InvalidNumeric()))
+                let value = value.floor().to_i32().ok_or_else(|| ParseError::InvalidNumeric(value_repr.to_owned()))?;
+                ymd.append(value, &value_repr, None)?;
             }
 
             idx += 1;
@@ -1122,13 +1188,13 @@ impl Parser {
         }
     }
 
-    fn parsems(&self, seconds_str: &str) -> ParseResult<(i32, i32)> {
-        if seconds_str.contains(".") {
-            let split: Vec<&str> = seconds_str.split(".").collect();
+    fn parsems(&self, seconds_str: &str) -> ParseResult<(i32, i64)> {
+        if seconds_str.contains('.') {
+            let split: Vec<&str> = seconds_str.split('.').collect();
             let (i, f): (&str, &str) = (split[0], split[1]);
 
             let i_parse = i.parse::<i32>()?;
-            let f_parse = ljust(f, 6, '0').parse::<i32>()?;
+            let f_parse = ljust(f, 9, '0').parse::<i64>()?;
             Ok((i_parse, f_parse))
         } else {
             Ok((seconds_str.parse::<i32>()?, 0))
@@ -1138,7 +1204,7 @@ impl Parser {
     fn find_hms_index(
         &self,
         idx: usize,
-        tokens: &Vec<String>,
+        tokens: &[String],
         info: &ParserInfo,
         allow_jump: bool,
     ) -> Option<usize> {
@@ -1154,7 +1220,7 @@ impl Parser {
             len_l - 2
         } else if idx > 1 {
             idx - 2
-        } else if len_l == 0{
+        } else if len_l == 0 {
             panic!("Attempting to find_hms_index() wih no tokens.");
         } else {
             0
@@ -1162,13 +1228,18 @@ impl Parser {
 
         if idx + 1 < len_l && info.hms_index(&tokens[idx + 1]).is_some() {
             hms_idx = Some(idx + 1)
-        } else if allow_jump && idx + 2 < len_l && tokens[idx + 1] == " "
+        } else if allow_jump
+            && idx + 2 < len_l
+            && tokens[idx + 1] == " "
             && info.hms_index(&tokens[idx + 2]).is_some()
         {
             hms_idx = Some(idx + 2)
         } else if idx > 0 && info.hms_index(&tokens[idx - 1]).is_some() {
             hms_idx = Some(idx - 1)
-        } else if len_l > 0 && idx > 0 && idx == len_l - 1 && tokens[idx - 1] == " "
+        } else if len_l > 0
+            && idx > 0
+            && idx == len_l - 1
+            && tokens[idx - 1] == " "
             && info.hms_index(&tokens[idx_minus_two]).is_some()
         {
             hms_idx = Some(idx - 2)
@@ -1177,10 +1248,11 @@ impl Parser {
         hms_idx
     }
 
+    #[allow(clippy::unnecessary_unwrap)]
     fn parse_hms(
         &self,
         idx: usize,
-        tokens: &Vec<String>,
+        tokens: &[String],
         info: &ParserInfo,
         hms_index: Option<usize>,
     ) -> (usize, Option<usize>) {
@@ -1199,11 +1271,11 @@ impl Parser {
         }
     }
 
-    fn assign_hms(&self, res: &mut ParsingResult, value_repr: &str, hms: usize) {
-        let value = self.to_decimal(value_repr);
+    fn assign_hms(&self, res: &mut ParsingResult, value_repr: &str, hms: usize) -> ParseResult<()> {
+        let value = self.to_decimal(value_repr)?;
 
         if hms == 0 {
-            res.hour = Some(value.to_i64().unwrap() as i32);
+            res.hour = value.to_i32();
             if !close_to_integer(&value) {
                 res.minute = Some((*SIXTY * (value % *ONE)).to_i64().unwrap() as i32);
             }
@@ -1214,13 +1286,14 @@ impl Parser {
         } else if hms == 2 {
             let (sec, micro) = self.parsems(value_repr).unwrap();
             res.second = Some(sec);
-            res.microsecond = Some(micro);
+            res.nanosecond = Some(micro);
         }
+
+        Ok(())
     }
 
-    fn to_decimal(&self, value: &str) -> Decimal {
-        // TODO: Justify unwrap
-        Decimal::from_str(value).unwrap()
+    fn to_decimal(&self, value: &str) -> ParseResult<Decimal> {
+        Decimal::from_str(value).or_else(|_| Err(ParseError::InvalidNumeric(value.to_owned())))
     }
 
     fn parse_min_sec(&self, value: Decimal) -> (i32, Option<i32>) {
@@ -1246,10 +1319,10 @@ impl Parser {
             if i > 0 && idx - 1 == skipped_idxs[i - 1] {
                 // UNWRAP: Having an initial value and unconditional push at end guarantees value
                 let mut t = skipped_tokens.pop().unwrap();
-                t.push_str(tokens[idx.clone()].as_ref());
+                t.push_str(tokens[*idx].as_ref());
                 skipped_tokens.push(t);
             } else {
-                skipped_tokens.push(tokens[idx.clone()].to_owned());
+                skipped_tokens.push(tokens[*idx].to_owned());
             }
         }
 
@@ -1272,11 +1345,11 @@ fn ljust(s: &str, chars: usize, replace: char) -> String {
 /// Main entry point for using `dtparse`. The parse function is responsible for
 /// taking in a string representing some time value, and turning it into
 /// a timestamp with optional timezone information if it can be identified.
-/// 
+///
 /// The default implementation assumes English values for names of months,
 /// days of the week, etc. It is equivalent to Python's `dateutil.parser.parse()`
 pub fn parse(timestr: &str) -> ParseResult<(NaiveDateTime, Option<FixedOffset>)> {
-    let res = Parser::default().parse(
+    let res = DEFAULT_PARSER.parse(
         timestr,
         None,
         None,

src/tests/fuzzing.rs

@@ -1,5 +1,8 @@
+use base64::Engine;
+use base64::engine::general_purpose::STANDARD;
 use chrono::NaiveDate;
 use std::collections::HashMap;
+use std::str;
 
 use parse;
 use ParseError;
@@ -7,18 +10,97 @@ use Parser;
 
 #[test]
 fn test_fuzz() {
-
-    assert_eq!(parse("\x2D\x38\x31\x39\x34\x38\x34"), Err(ParseError::ImpossibleTimestamp("Invalid month")));
+    assert_eq!(
+        parse("\x2D\x38\x31\x39\x34\x38\x34"),
+        Err(ParseError::ImpossibleTimestamp("Invalid month"))
+    );
 
     // Garbage in the third delimited field
-    assert_eq!(parse("2..\x00\x000d\x00+\x010d\x01\x00\x00\x00+"),
-               Err(ParseError::UnrecognizedFormat));
-    // OverflowError: Python int too large to convert to C long
-    // assert_eq!(parse("8888884444444888444444444881"), Err(ParseError::AmPmWithoutHour));
-    let default = NaiveDate::from_ymd(2016, 6, 29).and_hms(0, 0, 0);
-    let mut p = Parser::default();
-    let res = p.parse("\x0D\x31", None, None, false, false, Some(&default), false, &HashMap::new()).unwrap();
-    assert_eq!(res.0, default);
+    assert_eq!(
+        parse("2..\x00\x000d\x00+\x010d\x01\x00\x00\x00+"),
+        Err(ParseError::UnrecognizedFormat)
+    );
 
-    assert_eq!(parse("\x2D\x2D\x32\x31\x38\x6D"), Err(ParseError::ImpossibleTimestamp("Invalid minute")));
+    let default = NaiveDate::from_ymd_opt(2016, 6, 29).unwrap().and_hms_opt(0, 0, 0).unwrap();
+    let p = Parser::default();
+    let res = p.parse(
+        "\x0D\x31",
+        None,
+        None,
+        false,
+        false,
+        Some(&default),
+        false,
+        &HashMap::new(),
+    );
+    assert_eq!(res, Err(ParseError::NoDate));
+
+    assert_eq!(
+        parse("\x2D\x2D\x32\x31\x38\x6D"),
+        Err(ParseError::ImpossibleTimestamp("Invalid minute"))
+    );
 }
+
+#[test]
+fn large_int() {
+    let parse_result = parse("1412409095009.jpg");
+    assert!(parse_result.is_err());
+}
+
+#[test]
+fn another_large_int() {
+    let parse_result = parse("1412409095009");
+    assert!(parse_result.is_err());
+}
+
+#[test]
+fn an_even_larger_int() {
+    let parse_result = parse("1566997680962280");
+    assert!(parse_result.is_err());
+}
+
+#[test]
+fn empty_string() {
+    assert_eq!(parse(""), Err(ParseError::NoDate))
+}
+
+#[test]
+fn github_33() {
+    assert_eq!(parse("66:'"), Err(ParseError::InvalidNumeric("'".to_owned())))
+}
+
+#[test]
+fn github_32() {
+    assert_eq!(parse("99999999999999999999999"), Err(ParseError::InvalidNumeric("99999999999999999999999".to_owned())))
+}
+
+#[test]
+fn github_34() {
+    let parse_vec = STANDARD.decode("KTMuLjYpGDYvLjZTNiouNjYuHzZpLjY/NkwuNh42Ry42PzYnKTMuNk02NjY2NjA2NjY2NjY2NjYTNjY2Ni82NjY2NlAuNlAuNlNI").unwrap();
+    let parse_str = str::from_utf8(&parse_vec).unwrap();
+    let parse_result = parse(parse_str);
+    assert!(parse_result.is_err());
+}
+
+#[test]
+fn github_35() {
+    let parse_vec = STANDARD.decode("KTY6LjYqNio6KjYn").unwrap();
+    let parse_str = str::from_utf8(&parse_vec).unwrap();
+    let parse_result = parse(parse_str);
+    assert!(parse_result.is_err());
+}
+
+#[test]
+fn github_36() {
+    let parse_vec = STANDARD.decode("KTYuLg==").unwrap();
+    let parse_str = str::from_utf8(&parse_vec).unwrap();
+    let parse_result = parse(parse_str);
+    assert!(parse_result.is_err());
+}
+
+#[test]
+fn github_45() {
+    assert!(parse("/2018-fifa-").is_err());
+    assert!(parse("/2009/07/").is_err());
+    assert!(parse("2021-09-").is_err());
+}

src/tests/mod.rs

@@ -1,3 +1,14 @@
 mod fuzzing;
 mod pycompat_parser;
 mod pycompat_tokenizer;
+
+use chrono::NaiveDate;
+use crate::parse;
+
+#[test]
+fn nanosecond_precision() {
+    assert_eq!(
+        parse("2008.12.29T08:09:10.123456789").unwrap(),
+        (NaiveDate::from_ymd_opt(2008, 12, 29).unwrap().and_hms_nano_opt(8, 9, 10, 123_456_789).unwrap(), None)
+    )
+}

src/tests/pycompat_parser.rs

@@ -39,7 +39,7 @@ fn parse_and_assert(
     tzinfos: &HashMap<String, i32>,
 ) {
 
-    let mut parser = Parser::new(info);
+    let parser = Parser::new(info);
     let rs_parsed = parser.parse(
         s,
         dayfirst,
@@ -89,7 +89,7 @@ fn parse_fuzzy_and_assert(
     tzinfos: &HashMap<String, i32>,
 ) {
 
-    let mut parser = Parser::new(info);
+    let parser = Parser::new(info);
     let rs_parsed = parser.parse(
         s,
         dayfirst,
@@ -122,7 +122,7 @@ macro_rules! rs_tzinfo_map {
 #[test]
 fn test_parse_default0() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 10, minute: 36, second: 28,
@@ -135,7 +135,7 @@ fn test_parse_default0() {
 #[test]
 fn test_parse_default1() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 10, minute: 36, second: 28,
@@ -148,7 +148,7 @@ fn test_parse_default1() {
 #[test]
 fn test_parse_default2() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 10, minute: 36, second: 28,
@@ -161,7 +161,7 @@ fn test_parse_default2() {
 #[test]
 fn test_parse_default3() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 10, minute: 36, second: 0,
@@ -174,7 +174,7 @@ fn test_parse_default3() {
 #[test]
 fn test_parse_default4() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 0, minute: 0, second: 0,
@@ -187,7 +187,7 @@ fn test_parse_default4() {
 #[test]
 fn test_parse_default5() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 0, minute: 0, second: 0,
@@ -200,7 +200,7 @@ fn test_parse_default5() {
 #[test]
 fn test_parse_default6() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 0, minute: 0, second: 0,
@@ -213,7 +213,7 @@ fn test_parse_default6() {
 #[test]
 fn test_parse_default7() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 10, minute: 36, second: 28,
@@ -226,7 +226,7 @@ fn test_parse_default7() {
 #[test]
 fn test_parse_default8() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 10, minute: 36, second: 28,
@@ -239,7 +239,7 @@ fn test_parse_default8() {
 #[test]
 fn test_parse_default9() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 10, minute: 36, second: 0,
@@ -252,7 +252,7 @@ fn test_parse_default9() {
 #[test]
 fn test_parse_default10() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 10, minute: 0, second: 0,
@@ -265,7 +265,7 @@ fn test_parse_default10() {
 #[test]
 fn test_parse_default11() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 10, minute: 36, second: 0,
@@ -278,7 +278,7 @@ fn test_parse_default11() {
 #[test]
 fn test_parse_default12() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 10, minute: 36, second: 30,
@@ -291,7 +291,7 @@ fn test_parse_default12() {
 #[test]
 fn test_parse_default13() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 0, minute: 36, second: 5,
@@ -304,7 +304,7 @@ fn test_parse_default13() {
 #[test]
 fn test_parse_default14() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 0, minute: 36, second: 5,
@@ -317,7 +317,7 @@ fn test_parse_default14() {
 #[test]
 fn test_parse_default15() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 0, minute: 36, second: 5,
@@ -330,7 +330,7 @@ fn test_parse_default15() {
 #[test]
 fn test_parse_default16() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 0, minute: 36, second: 5,
@@ -343,7 +343,7 @@ fn test_parse_default16() {
 #[test]
 fn test_parse_default17() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 10, minute: 0, second: 0,
@@ -356,7 +356,7 @@ fn test_parse_default17() {
 #[test]
 fn test_parse_default18() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 22, minute: 0, second: 0,
@@ -369,7 +369,7 @@ fn test_parse_default18() {
 #[test]
 fn test_parse_default19() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 10, minute: 0, second: 0,
@@ -382,7 +382,7 @@ fn test_parse_default19() {
 #[test]
 fn test_parse_default20() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 22, minute: 0, second: 0,
@@ -395,7 +395,7 @@ fn test_parse_default20() {
 #[test]
 fn test_parse_default21() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 10, minute: 0, second: 0,
@@ -408,7 +408,7 @@ fn test_parse_default21() {
 #[test]
 fn test_parse_default22() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 22, minute: 0, second: 0,
@@ -421,7 +421,7 @@ fn test_parse_default22() {
 #[test]
 fn test_parse_default23() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 10, minute: 0, second: 0,
@@ -434,7 +434,7 @@ fn test_parse_default23() {
 #[test]
 fn test_parse_default24() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 22, minute: 0, second: 0,
@@ -447,7 +447,7 @@ fn test_parse_default24() {
 #[test]
 fn test_parse_default25() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 10, minute: 0, second: 0,
@@ -460,7 +460,7 @@ fn test_parse_default25() {
 #[test]
 fn test_parse_default26() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 22, minute: 0, second: 0,
@@ -473,7 +473,7 @@ fn test_parse_default26() {
 #[test]
 fn test_parse_default27() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 10, minute: 0, second: 0,
@@ -486,7 +486,7 @@ fn test_parse_default27() {
 #[test]
 fn test_parse_default28() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 22, minute: 0, second: 0,
@@ -499,7 +499,7 @@ fn test_parse_default28() {
 #[test]
 fn test_parse_default29() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 10, day: 25,
         hour: 0, minute: 0, second: 0,
@@ -512,7 +512,7 @@ fn test_parse_default29() {
 #[test]
 fn test_parse_default30() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2000, month: 12, day: 31,
         hour: 0, minute: 0, second: 0,
@@ -525,7 +525,7 @@ fn test_parse_default30() {
 #[test]
 fn test_parse_default31() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 0, minute: 1, second: 2,
@@ -538,7 +538,7 @@ fn test_parse_default31() {
 #[test]
 fn test_parse_default32() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 0, minute: 1, second: 2,
@@ -551,7 +551,7 @@ fn test_parse_default32() {
 #[test]
 fn test_parse_default33() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 12, minute: 8, second: 0,
@@ -564,7 +564,7 @@ fn test_parse_default33() {
 #[test]
 fn test_parse_default34() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 1, minute: 2, second: 3,
@@ -577,7 +577,7 @@ fn test_parse_default34() {
 #[test]
 fn test_parse_default35() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 1, minute: 2, second: 0,
@@ -590,7 +590,7 @@ fn test_parse_default35() {
 #[test]
 fn test_parse_default36() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 1, minute: 0, second: 2,
@@ -603,7 +603,7 @@ fn test_parse_default36() {
 #[test]
 fn test_parse_default37() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 0, minute: 1, second: 2,
@@ -616,7 +616,7 @@ fn test_parse_default37() {
 #[test]
 fn test_parse_default38() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 2, minute: 1, second: 0,
@@ -629,7 +629,7 @@ fn test_parse_default38() {
 #[test]
 fn test_parse_default39() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2004, month: 4, day: 10,
         hour: 11, minute: 30, second: 0,
@@ -642,7 +642,7 @@ fn test_parse_default39() {
 #[test]
 fn test_parse_default40() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 3,
         hour: 0, minute: 0, second: 0,
@@ -655,7 +655,7 @@ fn test_parse_default40() {
 #[test]
 fn test_parse_default41() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 0, minute: 0, second: 0,
@@ -668,7 +668,7 @@ fn test_parse_default41() {
 #[test]
 fn test_parse_default42() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2017, month: 11, day: 25,
         hour: 2, minute: 17, second: 0,
@@ -681,7 +681,7 @@ fn test_parse_default42() {
 #[test]
 fn test_parse_default43() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 10, minute: 36, second: 28,
@@ -694,7 +694,7 @@ fn test_parse_default43() {
 #[test]
 fn test_parse_default44() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 9, day: 25,
         hour: 10, minute: 36, second: 28,
@@ -707,7 +707,7 @@ fn test_parse_default44() {
 #[test]
 fn test_parse_default45() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 10, day: 1,
         hour: 0, minute: 0, second: 0,
@@ -720,7 +720,7 @@ fn test_parse_default45() {
 #[test]
 fn test_parse_default46() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2003, 9, 25).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2003, 9, 25).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2003, month: 10, day: 1,
         hour: 0, minute: 0, second: 0,
@@ -1434,6 +1434,42 @@ fn test_parse_offset4() {
                      None, false, &HashMap::new());
 }
 
+#[test]
+fn test_parse_offset5() {
+    let info = ParserInfo::default();
+    let pdt = PyDateTime {
+        year: 2018, month: 8, day: 10,
+        hour: 10, minute: 0, second: 0,
+        micros: 0, tzo: Some(-10800),
+    };
+    parse_and_assert(pdt, info, "2018-08-10 10:00:00 UTC+3", None, None, false, false,
+                     None, false, &HashMap::new());
+}
+
+#[test]
+fn test_parse_offset6() {
+    let info = ParserInfo::default();
+    let pdt = PyDateTime {
+        year: 2018, month: 8, day: 10,
+        hour: 15, minute: 36, second: 47,
+        micros: 0, tzo: Some(14400),
+    };
+    parse_and_assert(pdt, info, "2018-08-10 03:36:47 PM GMT-4", None, None, false, false,
+                     None, false, &HashMap::new());
+}
+
+#[test]
+fn test_parse_offset7() {
+    let info = ParserInfo::default();
+    let pdt = PyDateTime {
+        year: 2018, month: 8, day: 10,
+        hour: 4, minute: 15, second: 0,
+        micros: 0, tzo: Some(7200),
+    };
+    parse_and_assert(pdt, info, "2018-08-10 04:15:00 AM Z-02:00", None, None, false, false,
+                     None, false, &HashMap::new());
+}
+
 #[test]
 fn test_parse_dayfirst0() {
     let info = ParserInfo::default();
@@ -1605,7 +1641,7 @@ fn test_parse_dfyf1() {
 #[test]
 fn test_unspecified_fallback0() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2010, 1, 31).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2010, 1, 31).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2009, month: 4, day: 30,
         hour: 0, minute: 0, second: 0,
@@ -1618,7 +1654,7 @@ fn test_unspecified_fallback0() {
 #[test]
 fn test_unspecified_fallback1() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2010, 1, 31).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2010, 1, 31).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2007, month: 2, day: 28,
         hour: 0, minute: 0, second: 0,
@@ -1631,7 +1667,7 @@ fn test_unspecified_fallback1() {
 #[test]
 fn test_unspecified_fallback2() {
     let info = ParserInfo::default();
-    let default_rsdate = &NaiveDate::from_ymd(2010, 1, 31).and_hms(0, 0, 0);
+    let default_rsdate = &NaiveDate::from_ymd_opt(2010, 1, 31).unwrap().and_hms_opt(0, 0, 0).unwrap();
     let pdt = PyDateTime {
         year: 2008, month: 2, day: 29,
         hour: 0, minute: 0, second: 0,
@@ -1727,6 +1763,18 @@ fn test_parse_ignoretz6() {
 
 #[test]
 fn test_parse_ignoretz7() {
+    let info = ParserInfo::default();
+    let pdt = PyDateTime {
+        year: 1986, month: 7, day: 5,
+        hour: 8, minute: 15, second: 30,
+        micros: 0, tzo: None
+    };
+    parse_and_assert(pdt, info, "1986-07-05T08:15:30z", None, None, false, false,
+                     None, true, &HashMap::new());
+}
+
+#[test]
+fn test_parse_ignoretz8() {
     let info = ParserInfo::default();
     let pdt = PyDateTime {
         year: 1995, month: 4, day: 4,

src/tests/pycompat_tokenizer.rs

@@ -1,4 +1,3 @@
-
 //! This code has been generated by running the `build_pycompat_tokenizer.py` script
 //! in the repository root. Please do not edit it, as your edits will be destroyed
 //! upon re-running code generation.
@@ -12,7 +11,9 @@ fn tokenize_assert(test_str: &str, comparison: Vec<&str>) {
 
 #[test]
 fn test_tokenize0() {
-    let comp = vec!["Thu", " ", "Sep", " ", "25", " ", "10", ":", "36", ":", "28"];
+    let comp = vec![
+        "Thu", " ", "Sep", " ", "25", " ", "10", ":", "36", ":", "28",
+    ];
     tokenize_assert("Thu Sep 25 10:36:28", comp);
 }
 
@@ -294,7 +295,9 @@ fn test_tokenize46() {
 
 #[test]
 fn test_tokenize47() {
-    let comp = vec!["Thu", " ", "Sep", " ", "25", " ", "10", ":", "36", ":", "28", " ", "2003"];
+    let comp = vec![
+        "Thu", " ", "Sep", " ", "25", " ", "10", ":", "36", ":", "28", " ", "2003",
+    ];
     tokenize_assert("Thu Sep 25 10:36:28 2003", comp);
 }
 
@@ -306,7 +309,9 @@ fn test_tokenize48() {
 
 #[test]
 fn test_tokenize49() {
-    let comp = vec!["2003", "-", "09", "-", "25", "T", "10", ":", "49", ":", "41"];
+    let comp = vec![
+        "2003", "-", "09", "-", "25", "T", "10", ":", "49", ":", "41",
+    ];
     tokenize_assert("2003-09-25T10:49:41", comp);
 }
 
@@ -354,7 +359,9 @@ fn test_tokenize56() {
 
 #[test]
 fn test_tokenize57() {
-    let comp = vec!["2003", "-", "09", "-", "25", " ", "10", ":", "49", ":", "41.502"];
+    let comp = vec![
+        "2003", "-", "09", "-", "25", " ", "10", ":", "49", ":", "41.502",
+    ];
     tokenize_assert("2003-09-25 10:49:41,502", comp);
 }
 
@@ -510,7 +517,10 @@ fn test_tokenize82() {
 
 #[test]
 fn test_tokenize83() {
-    let comp = vec![" ", " ", "July", " ", " ", " ", "4", " ", ",", " ", " ", "1976", " ", " ", " ", "12", ":", "01", ":", "02", " ", " ", " ", "am", " ", " "];
+    let comp = vec![
+        " ", " ", "July", " ", " ", " ", "4", " ", ",", " ", " ", "1976", " ", " ", " ", "12", ":",
+        "01", ":", "02", " ", " ", " ", "am", " ", " ",
+    ];
     tokenize_assert("  July   4 ,  1976   12:01:02   am  ", comp);
 }
 
@@ -522,7 +532,9 @@ fn test_tokenize84() {
 
 #[test]
 fn test_tokenize85() {
-    let comp = vec!["1996", ".", "July", ".", "10", " ", "AD", " ", "12", ":", "08", " ", "PM"];
+    let comp = vec![
+        "1996", ".", "July", ".", "10", " ", "AD", " ", "12", ":", "08", " ", "PM",
+    ];
     tokenize_assert("1996.July.10 AD 12:08 PM", comp);
 }
 
@@ -558,25 +570,33 @@ fn test_tokenize90() {
 
 #[test]
 fn test_tokenize91() {
-    let comp = vec!["0", ":", "01", ":", "02", " ", "on", " ", "July", " ", "4", ",", " ", "1976"];
+    let comp = vec![
+        "0", ":", "01", ":", "02", " ", "on", " ", "July", " ", "4", ",", " ", "1976",
+    ];
     tokenize_assert("0:01:02 on July 4, 1976", comp);
 }
 
 #[test]
 fn test_tokenize92() {
-    let comp = vec!["0", ":", "01", ":", "02", " ", "on", " ", "July", " ", "4", ",", " ", "1976"];
+    let comp = vec![
+        "0", ":", "01", ":", "02", " ", "on", " ", "July", " ", "4", ",", " ", "1976",
+    ];
     tokenize_assert("0:01:02 on July 4, 1976", comp);
 }
 
 #[test]
 fn test_tokenize93() {
-    let comp = vec!["July", " ", "4", ",", " ", "1976", " ", "12", ":", "01", ":", "02", " ", "am"];
+    let comp = vec![
+        "July", " ", "4", ",", " ", "1976", " ", "12", ":", "01", ":", "02", " ", "am",
+    ];
     tokenize_assert("July 4, 1976 12:01:02 am", comp);
 }
 
 #[test]
 fn test_tokenize94() {
-    let comp = vec!["Mon", " ", "Jan", " ", " ", "2", " ", "04", ":", "24", ":", "27", " ", "1995"];
+    let comp = vec![
+        "Mon", " ", "Jan", " ", " ", "2", " ", "04", ":", "24", ":", "27", " ", "1995",
+    ];
     tokenize_assert("Mon Jan  2 04:24:27 1995", comp);
 }
 
@@ -588,7 +608,9 @@ fn test_tokenize95() {
 
 #[test]
 fn test_tokenize96() {
-    let comp = vec!["Jan", " ", "1", " ", "1999", " ", "11", ":", "23", ":", "34.578"];
+    let comp = vec![
+        "Jan", " ", "1", " ", "1999", " ", "11", ":", "23", ":", "34.578",
+    ];
     tokenize_assert("Jan 1 1999 11:23:34.578", comp);
 }
 
@@ -618,13 +640,17 @@ fn test_tokenize100() {
 
 #[test]
 fn test_tokenize101() {
-    let comp = vec!["0099", "-", "01", "-", "01", "T", "00", ":", "00", ":", "00"];
+    let comp = vec![
+        "0099", "-", "01", "-", "01", "T", "00", ":", "00", ":", "00",
+    ];
     tokenize_assert("0099-01-01T00:00:00", comp);
 }
 
 #[test]
 fn test_tokenize102() {
-    let comp = vec!["0031", "-", "01", "-", "01", "T", "00", ":", "00", ":", "00"];
+    let comp = vec![
+        "0031", "-", "01", "-", "01", "T", "00", ":", "00", ":", "00",
+    ];
     tokenize_assert("0031-01-01T00:00:00", comp);
 }
 
@@ -666,31 +692,42 @@ fn test_tokenize108() {
 
 #[test]
 fn test_tokenize109() {
-    let comp = vec!["Thu", " ", "Sep", " ", "25", " ", "10", ":", "36", ":", "28", " ", "BRST", " ", "2003"];
+    let comp = vec![
+        "Thu", " ", "Sep", " ", "25", " ", "10", ":", "36", ":", "28", " ", "BRST", " ", "2003",
+    ];
     tokenize_assert("Thu Sep 25 10:36:28 BRST 2003", comp);
 }
 
 #[test]
 fn test_tokenize110() {
-    let comp = vec!["2003", " ", "10", ":", "36", ":", "28", " ", "BRST", " ", "25", " ", "Sep", " ", "Thu"];
+    let comp = vec![
+        "2003", " ", "10", ":", "36", ":", "28", " ", "BRST", " ", "25", " ", "Sep", " ", "Thu",
+    ];
     tokenize_assert("2003 10:36:28 BRST 25 Sep Thu", comp);
 }
 
 #[test]
 fn test_tokenize111() {
-    let comp = vec!["Thu", ",", " ", "25", " ", "Sep", " ", "2003", " ", "10", ":", "49", ":", "41", " ", "-", "0300"];
+    let comp = vec![
+        "Thu", ",", " ", "25", " ", "Sep", " ", "2003", " ", "10", ":", "49", ":", "41", " ", "-",
+        "0300",
+    ];
     tokenize_assert("Thu, 25 Sep 2003 10:49:41 -0300", comp);
 }
 
 #[test]
 fn test_tokenize112() {
-    let comp = vec!["2003", "-", "09", "-", "25", "T", "10", ":", "49", ":", "41.5", "-", "03", ":", "00"];
+    let comp = vec![
+        "2003", "-", "09", "-", "25", "T", "10", ":", "49", ":", "41.5", "-", "03", ":", "00",
+    ];
     tokenize_assert("2003-09-25T10:49:41.5-03:00", comp);
 }
 
 #[test]
 fn test_tokenize113() {
-    let comp = vec!["2003", "-", "09", "-", "25", "T", "10", ":", "49", ":", "41", "-", "03", ":", "00"];
+    let comp = vec![
+        "2003", "-", "09", "-", "25", "T", "10", ":", "49", ":", "41", "-", "03", ":", "00",
+    ];
     tokenize_assert("2003-09-25T10:49:41-03:00", comp);
 }
 
@@ -708,198 +745,346 @@ fn test_tokenize115() {
 
 #[test]
 fn test_tokenize116() {
+    let comp = vec![
+        "2018", "-", "08", "-", "10", " ", "10", ":", "00", ":", "00", " ", "UTC", "+", "3",
+    ];
+    tokenize_assert("2018-08-10 10:00:00 UTC+3", comp);
+}
+
+#[test]
+fn test_tokenize117() {
+    let comp = vec![
+        "2018", "-", "08", "-", "10", " ", "03", ":", "36", ":", "47", " ", "PM", " ", "GMT", "-",
+        "4",
+    ];
+    tokenize_assert("2018-08-10 03:36:47 PM GMT-4", comp);
+}
+
+#[test]
+fn test_tokenize118() {
+    let comp = vec![
+        "2018", "-", "08", "-", "10", " ", "04", ":", "15", ":", "00", " ", "AM", " ", "Z", "-",
+        "02", ":", "00",
+    ];
+    tokenize_assert("2018-08-10 04:15:00 AM Z-02:00", comp);
+}
+
+#[test]
+fn test_tokenize119() {
     let comp = vec!["10", "-", "09", "-", "2003"];
     tokenize_assert("10-09-2003", comp);
 }
 
 #[test]
-fn test_tokenize117() {
+fn test_tokenize120() {
     let comp = vec!["10", ".", "09", ".", "2003"];
     tokenize_assert("10.09.2003", comp);
 }
 
 #[test]
-fn test_tokenize118() {
+fn test_tokenize121() {
     let comp = vec!["10", "/", "09", "/", "2003"];
     tokenize_assert("10/09/2003", comp);
 }
 
 #[test]
-fn test_tokenize119() {
+fn test_tokenize122() {
     let comp = vec!["10", " ", "09", " ", "2003"];
     tokenize_assert("10 09 2003", comp);
 }
 
 #[test]
-fn test_tokenize120() {
+fn test_tokenize123() {
     let comp = vec!["090107"];
     tokenize_assert("090107", comp);
 }
 
 #[test]
-fn test_tokenize121() {
+fn test_tokenize124() {
     let comp = vec!["2015", " ", "09", " ", "25"];
     tokenize_assert("2015 09 25", comp);
 }
 
 #[test]
-fn test_tokenize122() {
+fn test_tokenize125() {
     let comp = vec!["10", "-", "09", "-", "03"];
     tokenize_assert("10-09-03", comp);
 }
 
 #[test]
-fn test_tokenize123() {
+fn test_tokenize126() {
     let comp = vec!["10", ".", "09", ".", "03"];
     tokenize_assert("10.09.03", comp);
 }
 
 #[test]
-fn test_tokenize124() {
+fn test_tokenize127() {
     let comp = vec!["10", "/", "09", "/", "03"];
     tokenize_assert("10/09/03", comp);
 }
 
 #[test]
-fn test_tokenize125() {
+fn test_tokenize128() {
     let comp = vec!["10", " ", "09", " ", "03"];
     tokenize_assert("10 09 03", comp);
 }
 
-#[test]
-fn test_tokenize126() {
-    let comp = vec!["090107"];
-    tokenize_assert("090107", comp);
-}
-
-#[test]
-fn test_tokenize127() {
-    let comp = vec!["2015", " ", "09", " ", "25"];
-    tokenize_assert("2015 09 25", comp);
-}
-
-#[test]
-fn test_tokenize128() {
-    let comp = vec!["090107"];
-    tokenize_assert("090107", comp);
-}
-
 #[test]
 fn test_tokenize129() {
-    let comp = vec!["2015", " ", "09", " ", "25"];
-    tokenize_assert("2015 09 25", comp);
+    let comp = vec!["090107"];
+    tokenize_assert("090107", comp);
 }
 
 #[test]
 fn test_tokenize130() {
+    let comp = vec!["2015", " ", "09", " ", "25"];
+    tokenize_assert("2015 09 25", comp);
+}
+
+#[test]
+fn test_tokenize131() {
+    let comp = vec!["090107"];
+    tokenize_assert("090107", comp);
+}
+
+#[test]
+fn test_tokenize132() {
+    let comp = vec!["2015", " ", "09", " ", "25"];
+    tokenize_assert("2015 09 25", comp);
+}
+
+#[test]
+fn test_tokenize133() {
     let comp = vec!["April", " ", "2009"];
     tokenize_assert("April 2009", comp);
 }
 
 #[test]
-fn test_tokenize131() {
+fn test_tokenize134() {
     let comp = vec!["Feb", " ", "2007"];
     tokenize_assert("Feb 2007", comp);
 }
 
 #[test]
-fn test_tokenize132() {
+fn test_tokenize135() {
     let comp = vec!["Feb", " ", "2008"];
     tokenize_assert("Feb 2008", comp);
 }
 
 #[test]
-fn test_tokenize133() {
-    let comp = vec!["Thu", " ", "Sep", " ", "25", " ", "10", ":", "36", ":", "28", " ", "BRST", " ", "2003"];
+fn test_tokenize136() {
+    let comp = vec![
+        "Thu", " ", "Sep", " ", "25", " ", "10", ":", "36", ":", "28", " ", "BRST", " ", "2003",
+    ];
     tokenize_assert("Thu Sep 25 10:36:28 BRST 2003", comp);
 }
 
 #[test]
-fn test_tokenize134() {
-    let comp = vec!["1996", ".", "07", ".", "10", " ", "AD", " ", "at", " ", "15", ":", "08", ":", "56", " ", "PDT"];
+fn test_tokenize137() {
+    let comp = vec![
+        "1996", ".", "07", ".", "10", " ", "AD", " ", "at", " ", "15", ":", "08", ":", "56", " ",
+        "PDT",
+    ];
     tokenize_assert("1996.07.10 AD at 15:08:56 PDT", comp);
 }
 
 #[test]
-fn test_tokenize135() {
-    let comp = vec!["Tuesday", ",", " ", "April", " ", "12", ",", " ", "1952", " ", "AD", " ", "3", ":", "30", ":", "42", "pm", " ", "PST"];
+fn test_tokenize138() {
+    let comp = vec![
+        "Tuesday", ",", " ", "April", " ", "12", ",", " ", "1952", " ", "AD", " ", "3", ":", "30",
+        ":", "42", "pm", " ", "PST",
+    ];
     tokenize_assert("Tuesday, April 12, 1952 AD 3:30:42pm PST", comp);
 }
 
 #[test]
-fn test_tokenize136() {
-    let comp = vec!["November", " ", "5", ",", " ", "1994", ",", " ", "8", ":", "15", ":", "30", " ", "am", " ", "EST"];
+fn test_tokenize139() {
+    let comp = vec![
+        "November", " ", "5", ",", " ", "1994", ",", " ", "8", ":", "15", ":", "30", " ", "am",
+        " ", "EST",
+    ];
     tokenize_assert("November 5, 1994, 8:15:30 am EST", comp);
 }
 
 #[test]
-fn test_tokenize137() {
-    let comp = vec!["1994", "-", "11", "-", "05", "T", "08", ":", "15", ":", "30", "-", "05", ":", "00"];
+fn test_tokenize140() {
+    let comp = vec![
+        "1994", "-", "11", "-", "05", "T", "08", ":", "15", ":", "30", "-", "05", ":", "00",
+    ];
     tokenize_assert("1994-11-05T08:15:30-05:00", comp);
 }
 
 #[test]
-fn test_tokenize138() {
-    let comp = vec!["1994", "-", "11", "-", "05", "T", "08", ":", "15", ":", "30", "Z"];
+fn test_tokenize141() {
+    let comp = vec![
+        "1994", "-", "11", "-", "05", "T", "08", ":", "15", ":", "30", "Z",
+    ];
     tokenize_assert("1994-11-05T08:15:30Z", comp);
 }
 
 #[test]
-fn test_tokenize139() {
-    let comp = vec!["1976", "-", "07", "-", "04", "T", "00", ":", "01", ":", "02", "Z"];
+fn test_tokenize142() {
+    let comp = vec![
+        "1976", "-", "07", "-", "04", "T", "00", ":", "01", ":", "02", "Z",
+    ];
     tokenize_assert("1976-07-04T00:01:02Z", comp);
 }
 
 #[test]
-fn test_tokenize140() {
-    let comp = vec!["Tue", " ", "Apr", " ", "4", " ", "00", ":", "22", ":", "12", " ", "PDT", " ", "1995"];
+fn test_tokenize143() {
+    let comp = vec![
+        "Tue", " ", "Apr", " ", "4", " ", "00", ":", "22", ":", "12", " ", "PDT", " ", "1995",
+    ];
     tokenize_assert("Tue Apr 4 00:22:12 PDT 1995", comp);
 }
 
-#[test]
-fn test_tokenize141() {
-    let comp = vec!["Today", " ", "is", " ", "25", " ", "of", " ", "September", " ", "of", " ", "2003", ",", " ", "exactly", " ", "at", " ", "10", ":", "49", ":", "41", " ", "with", " ", "timezone", " ", "-", "03", ":", "00", "."];
-    tokenize_assert("Today is 25 of September of 2003, exactly at 10:49:41 with timezone -03:00.", comp);
-}
-
-#[test]
-fn test_tokenize142() {
-    let comp = vec!["Today", " ", "is", " ", "25", " ", "of", " ", "September", " ", "of", " ", "2003", ",", " ", "exactly", " ", "at", " ", "10", ":", "49", ":", "41", " ", "with", " ", "timezone", " ", "-", "03", ":", "00", "."];
-    tokenize_assert("Today is 25 of September of 2003, exactly at 10:49:41 with timezone -03:00.", comp);
-}
-
-#[test]
-fn test_tokenize143() {
-    let comp = vec!["I", " ", "have", " ", "a", " ", "meeting", " ", "on", " ", "March", " ", "1", ",", " ", "1974"];
-    tokenize_assert("I have a meeting on March 1, 1974", comp);
-}
-
 #[test]
 fn test_tokenize144() {
-    let comp = vec!["On", " ", "June", " ", "8", "th", ",", " ", "2020", ",", " ", "I", " ", "am", " ", "going", " ", "to", " ", "be", " ", "the", " ", "first", " ", "man", " ", "on", " ", "Mars"];
-    tokenize_assert("On June 8th, 2020, I am going to be the first man on Mars", comp);
+    let comp = vec![
+        "Today",
+        " ",
+        "is",
+        " ",
+        "25",
+        " ",
+        "of",
+        " ",
+        "September",
+        " ",
+        "of",
+        " ",
+        "2003",
+        ",",
+        " ",
+        "exactly",
+        " ",
+        "at",
+        " ",
+        "10",
+        ":",
+        "49",
+        ":",
+        "41",
+        " ",
+        "with",
+        " ",
+        "timezone",
+        " ",
+        "-",
+        "03",
+        ":",
+        "00",
+        ".",
+    ];
+    tokenize_assert(
+        "Today is 25 of September of 2003, exactly at 10:49:41 with timezone -03:00.",
+        comp,
+    );
 }
 
 #[test]
 fn test_tokenize145() {
-    let comp = vec!["Meet", " ", "me", " ", "at", " ", "the", " ", "AM", "/", "PM", " ", "on", " ", "Sunset", " ", "at", " ", "3", ":", "00", " ", "AM", " ", "on", " ", "December", " ", "3", "rd", ",", " ", "2003"];
-    tokenize_assert("Meet me at the AM/PM on Sunset at 3:00 AM on December 3rd, 2003", comp);
+    let comp = vec![
+        "Today",
+        " ",
+        "is",
+        " ",
+        "25",
+        " ",
+        "of",
+        " ",
+        "September",
+        " ",
+        "of",
+        " ",
+        "2003",
+        ",",
+        " ",
+        "exactly",
+        " ",
+        "at",
+        " ",
+        "10",
+        ":",
+        "49",
+        ":",
+        "41",
+        " ",
+        "with",
+        " ",
+        "timezone",
+        " ",
+        "-",
+        "03",
+        ":",
+        "00",
+        ".",
+    ];
+    tokenize_assert(
+        "Today is 25 of September of 2003, exactly at 10:49:41 with timezone -03:00.",
+        comp,
+    );
 }
 
 #[test]
 fn test_tokenize146() {
-    let comp = vec!["Meet", " ", "me", " ", "at", " ", "3", ":", "00", " ", "AM", " ", "on", " ", "December", " ", "3", "rd", ",", " ", "2003", " ", "at", " ", "the", " ", "AM", "/", "PM", " ", "on", " ", "Sunset"];
-    tokenize_assert("Meet me at 3:00 AM on December 3rd, 2003 at the AM/PM on Sunset", comp);
+    let comp = vec![
+        "I", " ", "have", " ", "a", " ", "meeting", " ", "on", " ", "March", " ", "1", ",", " ",
+        "1974",
+    ];
+    tokenize_assert("I have a meeting on March 1, 1974", comp);
 }
 
 #[test]
 fn test_tokenize147() {
-    let comp = vec!["Jan", " ", "29", ",", " ", "1945", " ", "14", ":", "45", " ", "AM", " ", "I", " ", "going", " ", "to", " ", "see", " ", "you", " ", "there", "?"];
-    tokenize_assert("Jan 29, 1945 14:45 AM I going to see you there?", comp);
+    let comp = vec![
+        "On", " ", "June", " ", "8", "th", ",", " ", "2020", ",", " ", "I", " ", "am", " ",
+        "going", " ", "to", " ", "be", " ", "the", " ", "first", " ", "man", " ", "on", " ",
+        "Mars",
+    ];
+    tokenize_assert(
+        "On June 8th, 2020, I am going to be the first man on Mars",
+        comp,
+    );
 }
 
 #[test]
 fn test_tokenize148() {
+    let comp = vec![
+        "Meet", " ", "me", " ", "at", " ", "the", " ", "AM", "/", "PM", " ", "on", " ", "Sunset",
+        " ", "at", " ", "3", ":", "00", " ", "AM", " ", "on", " ", "December", " ", "3", "rd", ",",
+        " ", "2003",
+    ];
+    tokenize_assert(
+        "Meet me at the AM/PM on Sunset at 3:00 AM on December 3rd, 2003",
+        comp,
+    );
+}
+
+#[test]
+fn test_tokenize149() {
+    let comp = vec![
+        "Meet", " ", "me", " ", "at", " ", "3", ":", "00", " ", "AM", " ", "on", " ", "December",
+        " ", "3", "rd", ",", " ", "2003", " ", "at", " ", "the", " ", "AM", "/", "PM", " ", "on",
+        " ", "Sunset",
+    ];
+    tokenize_assert(
+        "Meet me at 3:00 AM on December 3rd, 2003 at the AM/PM on Sunset",
+        comp,
+    );
+}
+
+#[test]
+fn test_tokenize150() {
+    let comp = vec![
+        "Jan", " ", "29", ",", " ", "1945", " ", "14", ":", "45", " ", "AM", " ", "I", " ",
+        "going", " ", "to", " ", "see", " ", "you", " ", "there", "?",
+    ];
+    tokenize_assert("Jan 29, 1945 14:45 AM I going to see you there?", comp);
+}
+
+#[test]
+fn test_tokenize151() {
     let comp = vec!["2017", "-", "07", "-", "17", " ", "06", ":", "15", ":"];
     tokenize_assert("2017-07-17 06:15:", comp);
 }

src/tokenize.rs

@@ -14,7 +14,6 @@ pub(crate) enum ParseState {
 }
 
 impl Tokenizer {
-
     pub(crate) fn new(parse_string: &str) -> Self {
         Tokenizer {
             token_stack: vec![],
@@ -92,7 +91,7 @@ impl Iterator for Tokenizer {
                     } else {
                         break;
                     }
-                },
+                }
                 ParseState::Alpha => {
                     seenletters = true;
                     if self.isword(nextchar) {
@@ -105,19 +104,21 @@ impl Iterator for Tokenizer {
                         self.parse_string.push(nextchar);
                         break;
                     }
-                },
+                }
                 ParseState::Numeric => {
                     if self.isnum(nextchar) {
                         // UNWRAP: Because we're in non-empty parse state, we're guaranteed to have a token
                         token.as_mut().unwrap().push(nextchar);
-                    } else if nextchar == '.' || (nextchar == ',' && token.as_ref().unwrap().len() >= 2) {
+                    } else if nextchar == '.'
+                        || (nextchar == ',' && token.as_ref().unwrap().len() >= 2)
+                    {
                         token.as_mut().unwrap().push(nextchar);
                         state = ParseState::NumericDecimal;
                     } else {
                         self.parse_string.push(nextchar);
                         break;
                     }
-                },
+                }
                 ParseState::AlphaDecimal => {
                     seenletters = true;
                     if nextchar == '.' || self.isword(nextchar) {
@@ -130,7 +131,7 @@ impl Iterator for Tokenizer {
                         self.parse_string.push(nextchar);
                         break;
                     }
-                },
+                }
                 ParseState::NumericDecimal => {
                     if nextchar == '.' || self.isnum(nextchar) {
                         // UNWRAP: Because we're in non-empty parse state, we're guaranteed to have a token
@@ -150,20 +151,25 @@ impl Iterator for Tokenizer {
         // We do something slightly different to express the same logic
         if state == ParseState::AlphaDecimal || state == ParseState::NumericDecimal {
             // UNWRAP: The state check guarantees that we have a value
-            let dot_count = token.as_ref().unwrap().chars().filter(|c| *c == '.').count();
+            let dot_count = token
+                .as_ref()
+                .unwrap()
+                .chars()
+                .filter(|c| *c == '.')
+                .count();
             let last_char = token.as_ref().unwrap().chars().last();
             let last_splittable = last_char == Some('.') || last_char == Some(',');
-    
+
             if seenletters || dot_count > 1 || last_splittable {
                 let mut l = self.decimal_split(token.as_ref().unwrap());
                 let remaining = l.split_off(1);
-    
+
                 token = Some(l[0].clone());
                 for t in remaining {
                     self.token_stack.push(t);
                 }
             }
-    
+
             if state == ParseState::NumericDecimal && dot_count == 0 {
                 token = Some(token.unwrap().replace(',', "."));
             }

src/weekday.rs

@@ -1,5 +1,5 @@
-use ParseResult;
 use ParseError;
+use ParseResult;
 
 #[derive(Debug, PartialEq)]
 pub enum DayOfWeek {
@@ -9,13 +9,12 @@ pub enum DayOfWeek {
     Wednesday,
     Thursday,
     Friday,
-    Saturday
+    Saturday,
 }
 
 impl DayOfWeek {
-
     pub fn to_numeral(&self) -> u32 {
-        match self {
+        match *self {
             DayOfWeek::Sunday => 0,
             DayOfWeek::Monday => 1,
             DayOfWeek::Tuesday => 2,
@@ -35,12 +34,12 @@ impl DayOfWeek {
             4 => DayOfWeek::Thursday,
             5 => DayOfWeek::Friday,
             6 => DayOfWeek::Saturday,
-            _ => panic!("Unreachable.")
+            _ => panic!("Unreachable."),
         }
     }
 
     /// Given the current day of the week, how many days until the next day?
-    pub fn difference(&self, other: DayOfWeek) -> u32 {
+    pub fn difference(&self, other: &DayOfWeek) -> u32 {
         // Have to use i32 because of wraparound issues
         let s_num = self.to_numeral() as i32;
         let o_num = other.to_numeral() as i32;
@@ -59,12 +58,12 @@ pub fn day_of_week(year: u32, month: u32, day: u32) -> ParseResult<DayOfWeek> {
         3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 => {
             let c = year / 100;
             (c, year - 100 * c)
-        },
+        }
         1 | 2 => {
             let c = (year - 1) / 100;
             (c, year - 1 - 100 * c)
-        },
-        _ => return Err(ParseError::ImpossibleTimestamp("Invalid month"))
+        }
+        _ => return Err(ParseError::ImpossibleTimestamp("Invalid month")),
     };
 
     let e = match month {
@@ -75,7 +74,7 @@ pub fn day_of_week(year: u32, month: u32, day: u32) -> ParseResult<DayOfWeek> {
         8 => 1,
         9 | 12 => 4,
         10 => 6,
-        _ => panic!("Unreachable.")
+        _ => panic!("Unreachable."),
     };
 
     // This implementation is Gregorian-only.
@@ -84,7 +83,7 @@ pub fn day_of_week(year: u32, month: u32, day: u32) -> ParseResult<DayOfWeek> {
         1 => 5,
         2 => 3,
         3 => 1,
-        _ => panic!("Unreachable.")
+        _ => panic!("Unreachable."),
     };
 
     match (day + e + f + g + g / 4) % 7 {
@@ -95,7 +94,7 @@ pub fn day_of_week(year: u32, month: u32, day: u32) -> ParseResult<DayOfWeek> {
         4 => Ok(DayOfWeek::Thursday),
         5 => Ok(DayOfWeek::Friday),
         6 => Ok(DayOfWeek::Saturday),
-        _ => panic!("Unreachable.")
+        _ => panic!("Unreachable."),
     }
 }
 
@@ -114,19 +113,18 @@ mod test {
 
     #[test]
     fn weekday_difference() {
-
-        assert_eq!(DayOfWeek::Sunday.difference(DayOfWeek::Sunday), 0);
-        assert_eq!(DayOfWeek::Sunday.difference(DayOfWeek::Monday), 1);
-        assert_eq!(DayOfWeek::Sunday.difference(DayOfWeek::Tuesday), 2);
-        assert_eq!(DayOfWeek::Sunday.difference(DayOfWeek::Wednesday), 3);
-        assert_eq!(DayOfWeek::Sunday.difference(DayOfWeek::Thursday), 4);
-        assert_eq!(DayOfWeek::Sunday.difference(DayOfWeek::Friday), 5);
-        assert_eq!(DayOfWeek::Sunday.difference(DayOfWeek::Saturday), 6);
-        assert_eq!(DayOfWeek::Monday.difference(DayOfWeek::Sunday), 6);
-        assert_eq!(DayOfWeek::Tuesday.difference(DayOfWeek::Sunday), 5);
-        assert_eq!(DayOfWeek::Wednesday.difference(DayOfWeek::Sunday), 4);
-        assert_eq!(DayOfWeek::Thursday.difference(DayOfWeek::Sunday), 3);
-        assert_eq!(DayOfWeek::Friday.difference(DayOfWeek::Sunday), 2);
-        assert_eq!(DayOfWeek::Saturday.difference(DayOfWeek::Sunday), 1);
+        assert_eq!(DayOfWeek::Sunday.difference(&DayOfWeek::Sunday), 0);
+        assert_eq!(DayOfWeek::Sunday.difference(&DayOfWeek::Monday), 1);
+        assert_eq!(DayOfWeek::Sunday.difference(&DayOfWeek::Tuesday), 2);
+        assert_eq!(DayOfWeek::Sunday.difference(&DayOfWeek::Wednesday), 3);
+        assert_eq!(DayOfWeek::Sunday.difference(&DayOfWeek::Thursday), 4);
+        assert_eq!(DayOfWeek::Sunday.difference(&DayOfWeek::Friday), 5);
+        assert_eq!(DayOfWeek::Sunday.difference(&DayOfWeek::Saturday), 6);
+        assert_eq!(DayOfWeek::Monday.difference(&DayOfWeek::Sunday), 6);
+        assert_eq!(DayOfWeek::Tuesday.difference(&DayOfWeek::Sunday), 5);
+        assert_eq!(DayOfWeek::Wednesday.difference(&DayOfWeek::Sunday), 4);
+        assert_eq!(DayOfWeek::Thursday.difference(&DayOfWeek::Sunday), 3);
+        assert_eq!(DayOfWeek::Friday.difference(&DayOfWeek::Sunday), 2);
+        assert_eq!(DayOfWeek::Saturday.difference(&DayOfWeek::Sunday), 1);
     }
-}
+}