tw_merge 0.1.21

Macros for merging Tailwind CSS v4 classes or creating variants.
Documentation 
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use std::sync::OnceLock;

/// Configuration for merging Tailwind classes.
/// If you want to set global options use [`set_merge_options`].
#[derive(Clone, Copy, Debug)]
pub struct MergeOptions {
    /// Custom prefix for modifiers in Tailwind classes
    ///
    /// Default is empty string
    ///
    /// <https://tailwindcss.com/docs/configuration#prefix>
    pub prefix: &'static str,
    /// Custom separator for modifiers in Tailwind classes
    ///
    /// Default is `:`
    ///
    /// <https://tailwindcss.com/docs/configuration#separator>
    pub separator: &'static str,
}

impl Default for MergeOptions {
    fn default() -> Self {
        MERGE_OVERRIDE.get().copied().unwrap_or(DEFAULT_MERGE_OPTIONS)
    }
}

const DEFAULT_MERGE_OPTIONS: MergeOptions = MergeOptions { prefix: "", separator: ":" };

impl From<MergeOptions> for crate::ast::AstParseOptions<'static> {
    fn from(options: MergeOptions) -> Self {
        crate::ast::AstParseOptions { prefix: options.prefix, separator: options.separator }
    }
}

pub(crate) static MERGE_OVERRIDE: OnceLock<MergeOptions> = OnceLock::new();

/// Set global options for merging Tailwind classes.
/// Useful for getting all the macros to work with custom options.
pub fn set_merge_options(options: MergeOptions) {
    let _ = MERGE_OVERRIDE.set(options);
}