Function expand_enum_assertion

assert-struct-macros/src/expand.rs:444–479

Generate assertion for enum tuple variants with error collection

(value_expr: &TokenStream, pattern: &PatternEnum)

/// Generate assertion for enum tuple variants with error collection
fn expand_enum_assertion(value_expr: &TokenStream, pattern: &PatternEnum) -> TokenStream {
    let variant_path = &pattern.path;
    let elements = &pattern.elements;
    let span = variant_path.span();

    let error_push = generate_error_push(
        span,
        quote!(format!("{:?}", #value_expr)),
        quote!(None),
        pattern.node_id,
    );

    // Special handling for unit variants (empty elements)
    if elements.is_empty() {
        quote_spanned! {span=>
            if !matches!(#value_expr, #variant_path) {
                #error_push
            }
        }
    } else {
        // Use helper to process elements with appropriate path
        let (match_patterns, element_assertions) = process_tuple_elements(elements, "__elem_");

        quote_spanned! {span=>
            #[allow(unreachable_patterns)]
            match &#value_expr {
                #variant_path(#(#match_patterns),*) => {
                    #(#element_assertions)*
                },
                _ => {
                    #error_push
                }
            }
        }
    }
}

/// Generate range assertion with error collection
fn expand_range_assertion(value_expr: &TokenStream, pattern: &PatternRange) -> TokenStream {