45 lines
1 KiB
Rust
45 lines
1 KiB
Rust
use super::*;
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enum AttrKind {
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Inner, Outer
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}
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pub(super) fn inner_attributes(p: &mut Parser) {
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many(p, |p| attribute(p, AttrKind::Inner))
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}
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pub(super) fn outer_attributes(p: &mut Parser) {
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many(p, |p| attribute(p, AttrKind::Outer))
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}
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fn attribute(p: &mut Parser, kind: AttrKind) -> bool {
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fn attr_tail(p: &mut Parser) {
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meta_item(p) && p.expect(R_BRACK);
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}
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match kind {
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AttrKind::Inner => node_if(p, [POUND, EXCL, L_BRACK], ATTR, attr_tail),
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AttrKind::Outer => node_if(p, [POUND, L_BRACK], ATTR, attr_tail),
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}
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}
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fn meta_item(p: &mut Parser) -> bool {
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node_if(p, IDENT, META_ITEM, |p| {
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if p.eat(EQ) {
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if !expressions::literal(p) {
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p.error()
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.message("expected literal")
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.emit();
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}
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} else if p.eat(L_PAREN) {
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comma_list(p, R_PAREN, meta_item_inner);
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p.expect(R_PAREN);
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}
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})
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}
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fn meta_item_inner(p: &mut Parser) -> bool {
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meta_item(p) || expressions::literal(p)
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}
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