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Recursively expand items, and keep expansion stack, per Paul's code review comments.

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This commit is contained in:
Eric Holk 2012-07-05 16:46:32 -07:00
parent d09bcc0131
commit 84434bc084
1 changed files with 10 additions and 3 deletions
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13
src/libsyntax/ext/expand.rs
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@ -139,7 +139,7 @@ fn expand_item(exts: hashmap<str, syntax_extension>,
};
let it = alt it.node {
ast::item_mac(*) {
expand_item_mac(exts, cx, it)
expand_item_mac(exts, cx, it, fld)
}
_ { it }
};
@ -150,7 +150,8 @@ fn expand_item(exts: hashmap<str, syntax_extension>,
}
fn expand_item_mac(exts: hashmap<str, syntax_extension>,
cx: ext_ctxt, &&it: @ast::item) -> @ast::item {
cx: ext_ctxt, &&it: @ast::item,
fld: ast_fold) -> @ast::item {
alt it.node {
item_mac({node: mac_invoc_tt(pth, tt), span}) {
let extname = pth.idents[0];
@ -160,7 +161,13 @@ fn expand_item_mac(exts: hashmap<str, syntax_extension>,
#fmt("macro undefined: '%s'", *extname))
}
some(item_tt(expand)) {
expand.expander(cx, it.span, it.ident, tt)
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));
cx.bt_pop();
ret it
}
_ { cx.span_fatal(it.span,
#fmt("%s is not a legal here", *extname)) }