Method into_pattern

assert-struct-macros/src/pattern/regex.rs:33–49

Convert this PatternLike into a Pattern, optimizing string literals to PatternRegex. If the expression is a string literal, it will be converted to PatternRegex for compile-time regex compilation. Otherwise, it returns Pattern::Like for runtime pattern matching using the Like trait.

(self)

    /// compile-time regex compilation. Otherwise, it returns Pattern::Like for runtime
    /// pattern matching using the Like trait.
    pub(crate) fn into_pattern(self) -> crate::pattern::Pattern {
        if let syn::Expr::Lit(syn::ExprLit {
            lit: syn::Lit::Str(lit_str),
            ..
        }) = &self.expr
        {
            // String literal - compile regex at macro expansion time
            crate::pattern::Pattern::Regex(PatternRegex {
                node_id: self.node_id,
                pattern: lit_str.value(),
                span: lit_str.span(),
            })
        } else {
            // Expression - use Like trait at runtime
            crate::pattern::Pattern::Like(self)
        }
    }
}

#[cfg(feature = "regex")]