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rustc: Introduce and parse additional meta_item forms

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Examples: #[test], #[link(name = "vers")]

Issue #487
This commit is contained in:
Brian Anderson 2011-06-21 14:23:16 -07:00
parent 64513808ca
commit adc18bb24a
8 changed files with 153 additions and 37 deletions
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31
src/comp/front/parser.rs
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@ -2113,26 +2113,41 @@ fn parse_inner_attrs(&parser p) -> vec[ast::attribute] {
fn parse_meta_item(&parser p) -> @ast::meta_item {
auto lo = p.get_lo_pos();
auto ident = parse_ident(p);
expect(p, token::EQ);
alt (p.peek()) {
case (token::LIT_STR(?s)) {
auto hi = p.get_hi_pos();
case (token::EQ) {
p.bump();
ret @spanned(lo, hi, rec(key=ident, value=p.get_str(s)));
alt (p.peek()) {
case (token::LIT_STR(?s)) {
p.bump();
auto value = p.get_str(s);
auto hi = p.get_hi_pos();
ret @spanned(lo, hi, ast::meta_key_value(ident, value));
}
case (_) {
p.fatal("Metadata items must be string literals");
}
}
}
case (token::LPAREN) {
auto inner_items = parse_meta_seq(p);
auto hi = p.get_hi_pos();
ret @spanned(lo, hi, ast::meta_list(ident, inner_items));
}
case (_) {
auto hi = p.get_hi_pos();
ret @spanned(lo, hi, ast::meta_word(ident));
}
case (_) { p.fatal("Metadata items must be string literals"); }
}
fail;
}
fn parse_meta(&parser p) -> vec[@ast::meta_item] {
fn parse_meta_seq(&parser p) -> vec[@ast::meta_item] {
ret parse_seq(token::LPAREN, token::RPAREN, some(token::COMMA),
parse_meta_item, p).node;
}
fn parse_optional_meta(&parser p) -> vec[@ast::meta_item] {
alt (p.peek()) {
case (token::LPAREN) { ret parse_meta(p); }
case (token::LPAREN) { ret parse_meta_seq(p); }
case (_) { let vec[@ast::meta_item] v = []; ret v; }
}
}