Macro cssparser::ascii_case_insensitive_phf_map

macro_rules! ascii_case_insensitive_phf_map {
    ($Name: ident : Map<$ValueType: ty> = {
        $( $key: expr => $value: expr, )*
    }) => { ... };
}

Define a placeholder type $Name with a method fn get(input: &str) -> Option<&'static $ValueType>.

This method uses finds a match for the input string in a phf map. Matching is case-insensitive in the ASCII range.

Requirements:

• The phf and cssparser_macros crates must also be imported at the crate root
• The values must be given a strings that contain Rust syntax for a constant expression.

Example:

extern crate phf;
#[macro_use] extern crate cssparser;
#[macro_use] extern crate cssparser_macros;


fn color_rgb(input: &str) -> Option<(u8, u8, u8)> {
    ascii_case_insensitive_phf_map! {
        KEYWORDS: Map<(u8, u8, u8)> = {
            "red" => "(255, 0, 0)",
            "green" => "(0, 255, 0)",
            "blue" => "(0, 0, 255)",
        }
    }
    KEYWORDS::get(input).cloned()
}