bjoernager/rust
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Enable item macros to define macros.

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This commit is contained in:
Paul Stansifer 2012-07-06 14:29:50 -07:00
parent 579768baa5
commit cabee6391d
3 changed files with 17 additions and 6 deletions
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12
src/libsyntax/ext/expand.rs
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@ -170,10 +170,16 @@ fn expand_item_mac(exts: hashmap<str, syntax_extension>,
cx.bt_push(expanded_from({call_site: it.span,
callie: {name: *extname,
span: expand.span}}));
let it = fld.fold_item(
expand.expander(cx, it.span, it.ident, tt));
let maybe_it =
alt expand.expander(cx, it.span, it.ident, tt) {
mr_item(it) { fld.fold_item(it) }
mr_def(mdef) {
exts.insert(*mdef.ident, mdef.ext);
none
}
};
cx.bt_pop();
ret it
ret maybe_it
}
_ { cx.span_fatal(it.span,
#fmt("%s is not a legal here", *extname)) }