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Merged
phorward merged 12 commits into from
Jul 20, 2026
Merged

Add parse_float facilities #1

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dbbf544
First naive parse_float() attempt
phorward Jul 9, 2022
0226351
Improved, mathematical attempt, incomplete
phorward Nov 1, 2022
fbf15fe
Added exponential notation parsing and rounding
phorward Mar 18, 2023
3e503a1
Updating documentation and meta data
phorward Mar 18, 2023
5696d12
Fixing Cargo.toml
phorward Mar 18, 2023
8e114dd
Some improvements for higher precisions
phorward Mar 21, 2023
adea892
Improving precision in exponential notation
phorward Mar 27, 2023
63d87e1
Updated testcases with precision fail
phorward Oct 2, 2024
fd7a9d5
cargo fmt
phorward Oct 2, 2024
ce0b39e
wip: Clean-up code and README.md
phorward Nov 2, 2024
dc08401
doc: Typo fix
phorward Jul 7, 2026
1a4afae
feat: Improve precision by complete rewrite
phorward Jul 20, 2026
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2 changes: 1 addition & 1 deletion Cargo.lock
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7 changes: 5 additions & 2 deletions Cargo.toml
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Original file line number Diff line number Diff line change
@@ -1,8 +1,8 @@
[package]
name = "num-parse"
version = "0.1.2"
version = "0.2.0"
edition = "2021"
description = "Generic, JavaScript-like parseInt() functions for Rust."
description = "parseInt() and parseFloat() as known from JavaScript, but generic, and in Rust"
authors = [
"Jan Max Meyer <jmm@phorward.de>"
]
Expand All @@ -13,6 +13,9 @@ categories = [
]
keywords = [
"parseint",
"parsefloat",
"javascript",
"ecmascript",
"numbers"
]

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2 changes: 1 addition & 1 deletion LICENSE
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@@ -1,4 +1,4 @@
Copyright © 2022 by Jan Max Meyer, Phorward Software Technologies.
Copyright © 2024 by Jan Max Meyer, Phorward Software Technologies.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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14 changes: 10 additions & 4 deletions README.md
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Expand Up @@ -5,11 +5,9 @@
[![crates.io](https://img.shields.io/crates/v/num-parse)](https://crates.io/crates/num-parse)
[![License: MIT](https://img.shields.io/badge/License-MIT-green.svg)](https://opensource.org/licenses/MIT)

Generic, JavaScript-like parseInt() functions for Rust.
Generic, JavaScript-style parseInt() and parseFloat() functions for Rust.

This crate is intended to provide a fast and generic `parseInt()`-like implementation for Rust, which mostly follows the specification described in the [MDN parseInt() documentation](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/parseInt).

Likewise in JavaScript, a `parseFloat()`-like implementation for float-types is planned as well, therefore the crate has been named `num-parse` already, althought it currently provides `parse_int()` and variative functions only.
This crate is intended to provide a fast and generic `parseInt()`- and `parseFloat()`-like implementation for Rust, which mostly follows the specification described in the MDN documentation for [parseInt()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/parseInt) and [parseFloat()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/parseFloat).

## parse_int(), parse_uint()

Expand All @@ -33,3 +31,11 @@ assert_eq!(
Some(3405691582usize)
);
```

## parse_float()

TODO

## PeekableIterator

This crate is required by and implemented together with the [Tokay programming language](https://tokay.dev) to parse and calculate numerical values from a `PeekableIterator`-trait, which is also defined here. A JavaScript-like numerical parsing was thought to be useful for other projects as well.
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