Crate rust_cfg_parser

A very simple Rust library to parse rust cfg() expression.

Examples

use rust_cfg_parser::{parse, CfgValue};

let expr = parse("cfg(windows)").unwrap();

let matches = expr.matches(&[CfgValue::Name("linux".to_string())]);
assert_eq!(false, matches);

let matches = expr.matches(&[CfgValue::Name("windows".to_string())]);
assert_eq!(true, matches);

let expr = parse(
    "cfg(all(any(target_arch =\"x86_64\", target_arch = \"aarch64\"), target_os = \"hermit\"))",
)
.unwrap();
assert_eq!(
    true,
    expr.matches(&[
        CfgValue::KeyPair("target_arch".to_string(), "x86_64".to_string()),
        CfgValue::KeyPair("target_os".to_string(), "hermit".to_string())
    ])
);

Structs

Cfg

A struct to represent the parsed cfg string.

CfgParseError

Defines the parser error type.

Enums

CfgExpr

An enum type to represent the parsed cfg string.

CfgParseErrorKind

An enum type for errors when parsing the cfg string.

CfgValue

An enum type to represent the parsed values in a cfg string.

Functions

parse

Parses a string rust cfg attribute syntax to an expression that can be evaluated.