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Parse const effect block

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This commit is contained in:
Lukas Wirth 2020-12-23 02:15:30 +01:00
parent 03a9bbacf2
commit 2c94c4964a
4 changed files with 38 additions and 2 deletions
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9
crates/parser/src/grammar/expressions/atom.rs
View file

@ -46,6 +46,7 @@ pub(super) const ATOM_EXPR_FIRST: TokenSet =
T![continue],
T![async],
T![try],
T![const],
T![loop],
T![for],
LIFETIME_IDENT,
@ -115,6 +116,14 @@ pub(super) fn atom_expr(p: &mut Parser, r: Restrictions) -> Option<(CompletedMar
block_expr(p);
m.complete(p, EFFECT_EXPR)
}
// test const_block
// fn f() { const { } }
T![const] if la == T!['{'] => {
let m = p.start();
p.bump(T![const]);
block_expr(p);
m.complete(p, EFFECT_EXPR)
}
T!['{'] => {
// test for_range_from
// fn foo() {

7
crates/parser/src/grammar/items.rs
View file

@ -96,7 +96,10 @@ pub(super) fn maybe_item(p: &mut Parser, m: Marker) -> Result<(), Marker> {
let mut has_mods = false;
// modifiers
has_mods |= p.eat(T![const]);
if p.at(T![const]) && p.nth(1) != T!['{'] {
p.eat(T![const]);
has_mods = true;
}
// test_err async_without_semicolon
// fn foo() { let _ = async {} }
@ -167,7 +170,7 @@ pub(super) fn maybe_item(p: &mut Parser, m: Marker) -> Result<(), Marker> {
m.complete(p, TRAIT);
}
T![const] => {
T![const] if p.nth(1) != T!['{'] => {
consts::konst(p, m);
}