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syntax: Use UFCS in the expansion of #[deriving(Clone)]

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This commit is contained in:
Jorge Aparicio 2014-11-03 10:53:49 -05:00
parent b11b706545
commit 2a7fb3584c
1 changed files with 11 additions and 3 deletions
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14
src/libsyntax/ext/deriving/clone.rs
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@ -52,11 +52,19 @@ fn cs_clone(
name: &str,
cx: &mut ExtCtxt, trait_span: Span,
substr: &Substructure) -> P<Expr> {
let clone_ident = substr.method_ident;
let ctor_ident;
let all_fields;
let subcall = |field: &FieldInfo|
cx.expr_method_call(field.span, field.self_.clone(), clone_ident, Vec::new());
let fn_path = vec![
cx.ident_of("std"),
cx.ident_of("clone"),
cx.ident_of("Clone"),
cx.ident_of("clone"),
];
let subcall = |field: &FieldInfo| {
let args = vec![cx.expr_addr_of(field.span, field.self_.clone())];
cx.expr_call_global(field.span, fn_path.clone(), args)
};
match *substr.fields {
Struct(ref af) => {