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Simplify NO_BLOCK testing

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This commit is contained in:
DJMcNab 2018-12-20 12:28:59 +00:00
parent 5205c016e9
commit 27e814e182
2 changed files with 3 additions and 11 deletions
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5
crates/ra_syntax/src/grammar/expressions.rs
View file

@ -5,7 +5,6 @@ pub(super) use self::atom::{literal, LITERAL_FIRST};
use super::*;
const EXPR_FIRST: TokenSet = LHS_FIRST;
const EXPR_FIRST_NO_BLOCK: TokenSet = LHS_FIRST_NO_BLOCK;
pub(super) fn expr(p: &mut Parser) -> BlockLike {
let r = Restrictions {
@ -210,10 +209,6 @@ const LHS_FIRST: TokenSet = token_set_union![
token_set![AMP, STAR, EXCL, DOTDOT, MINUS],
atom::ATOM_EXPR_FIRST,
];
const LHS_FIRST_NO_BLOCK: TokenSet = token_set_union![
token_set![AMP, STAR, EXCL, DOTDOT, MINUS],
atom::ATOM_EXPR_FIRST_NO_BLOCK,
];
fn lhs(p: &mut Parser, r: Restrictions) -> Option<(CompletedMarker, BlockLike)> {
let m;

9
crates/ra_syntax/src/grammar/expressions/atom.rs
View file

@ -36,10 +36,11 @@ pub(crate) fn literal(p: &mut Parser) -> Option<CompletedMarker> {
}
// E.g. for after the break in `if break {}`, this should not match
pub(super) const ATOM_EXPR_FIRST_NO_BLOCK: TokenSet = token_set_union![
pub(super) const ATOM_EXPR_FIRST: TokenSet = token_set_union![
LITERAL_FIRST,
token_set![
L_PAREN,
L_CURLY,
L_BRACK,
PIPE,
MOVE_KW,
@ -59,9 +60,6 @@ pub(super) const ATOM_EXPR_FIRST_NO_BLOCK: TokenSet = token_set_union![
],
];
pub(super) const ATOM_EXPR_FIRST: TokenSet =
token_set_union![ATOM_EXPR_FIRST_NO_BLOCK, token_set![L_CURLY],];
const EXPR_RECOVERY_SET: TokenSet = token_set![LET_KW];
pub(super) fn atom_expr(p: &mut Parser, r: Restrictions) -> Option<(CompletedMarker, BlockLike)> {
@ -442,8 +440,7 @@ fn break_expr(p: &mut Parser, r: Restrictions) -> CompletedMarker {
// for i in break {}
// match break {}
// }
if r.forbid_structs && p.at_ts(EXPR_FIRST_NO_BLOCK) || !r.forbid_structs && p.at_ts(EXPR_FIRST)
{
if p.at_ts(EXPR_FIRST) && !(r.forbid_structs && p.at(L_CURLY)) {
expr(p);
}
m.complete(p, BREAK_EXPR)