Crate hexponent

Hexponent

Hexponent is a hexadecimal literal parser for Rust based on the C11 specification section 6.4.4.2.

use hexponent::FloatLiteral;
let float_repr: FloatLiteral = "0x3.4".parse().unwrap();
let value = float_repr.convert::<f32>().inner();
assert_eq!(value, 3.25);

Hexponent has a minimum supported rust version of 1.34.

Features

• No dependencies
• Non-UTF-8 parser
• Precision warnings
• no_std support (MSRV 1.36.0)

Differences from the specification

There are two places where hexponent differs from the C11 specificaiton.

• An exponent is not required. (0x1.2 is allowed)
• floating-suffix is not parsed. (0x1p4l is not allowed)

no_std support

no_std support can be enabled by disabling the default std feature for hexponent in your Cargo.toml.

hexponent = {version = "0.2", default-features = false}

no_std support is only possible in rustc version 1.36.0 and higher.

Disabling the std feature currently only disables the std::error::Error implementation for ParseError.

Structs

FloatLiteral

Represents a floating point literal

ParseError

Error type for parsing hexadecimal literals.

Enums

ConversionResult

Indicates the preicsision of a conversion

ParseErrorKind

Kind of parsing error.

Traits

FPFormat

Trait to describe conversion to floating point formats.