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-rw-r--r--crates/libsyntax2/src/grammar/expressions/atom.rs10
-rw-r--r--crates/libsyntax2/src/grammar/expressions/mod.rs4
-rw-r--r--crates/libsyntax2/src/grammar/params.rs2
-rw-r--r--crates/libsyntax2/src/grammar/patterns.rs2
-rw-r--r--crates/libsyntax2/src/parser_api.rs5
5 files changed, 14 insertions, 9 deletions
diff --git a/crates/libsyntax2/src/grammar/expressions/atom.rs b/crates/libsyntax2/src/grammar/expressions/atom.rs
index 1488e12a4..fdb4718ba 100644
--- a/crates/libsyntax2/src/grammar/expressions/atom.rs
+++ b/crates/libsyntax2/src/grammar/expressions/atom.rs
@@ -18,7 +18,7 @@ pub(crate) const LITERAL_FIRST: TokenSet =
18 STRING, RAW_STRING, BYTE_STRING, RAW_BYTE_STRING]; 18 STRING, RAW_STRING, BYTE_STRING, RAW_BYTE_STRING];
19 19
20pub(crate) fn literal(p: &mut Parser) -> Option<CompletedMarker> { 20pub(crate) fn literal(p: &mut Parser) -> Option<CompletedMarker> {
21 if !LITERAL_FIRST.contains(p.current()) { 21 if !p.at_ts(LITERAL_FIRST) {
22 return None; 22 return None;
23 } 23 }
24 let m = p.start(); 24 let m = p.start();
@@ -108,7 +108,7 @@ fn tuple_expr(p: &mut Parser) -> CompletedMarker {
108 let mut saw_expr = false; 108 let mut saw_expr = false;
109 while !p.at(EOF) && !p.at(R_PAREN) { 109 while !p.at(EOF) && !p.at(R_PAREN) {
110 saw_expr = true; 110 saw_expr = true;
111 if !EXPR_FIRST.contains(p.current()) { 111 if !p.at_ts(EXPR_FIRST) {
112 p.error("expected expression"); 112 p.error("expected expression");
113 break; 113 break;
114 } 114 }
@@ -147,7 +147,7 @@ fn array_expr(p: &mut Parser) -> CompletedMarker {
147 if p.at(R_BRACK) { 147 if p.at(R_BRACK) {
148 break; 148 break;
149 } 149 }
150 if !EXPR_FIRST.contains(p.current()) { 150 if !p.at_ts(EXPR_FIRST) {
151 p.error("expected expression"); 151 p.error("expected expression");
152 break; 152 break;
153 } 153 }
@@ -360,7 +360,7 @@ fn return_expr(p: &mut Parser) -> CompletedMarker {
360 assert!(p.at(RETURN_KW)); 360 assert!(p.at(RETURN_KW));
361 let m = p.start(); 361 let m = p.start();
362 p.bump(); 362 p.bump();
363 if EXPR_FIRST.contains(p.current()) { 363 if p.at_ts(EXPR_FIRST) {
364 expr(p); 364 expr(p);
365 } 365 }
366 m.complete(p, RETURN_EXPR) 366 m.complete(p, RETURN_EXPR)
@@ -395,7 +395,7 @@ fn break_expr(p: &mut Parser) -> CompletedMarker {
395 let m = p.start(); 395 let m = p.start();
396 p.bump(); 396 p.bump();
397 p.eat(LIFETIME); 397 p.eat(LIFETIME);
398 if EXPR_FIRST.contains(p.current()) { 398 if p.at_ts(EXPR_FIRST) {
399 expr(p); 399 expr(p);
400 } 400 }
401 m.complete(p, BREAK_EXPR) 401 m.complete(p, BREAK_EXPR)
diff --git a/crates/libsyntax2/src/grammar/expressions/mod.rs b/crates/libsyntax2/src/grammar/expressions/mod.rs
index f7b9f7086..d5ee91ad8 100644
--- a/crates/libsyntax2/src/grammar/expressions/mod.rs
+++ b/crates/libsyntax2/src/grammar/expressions/mod.rs
@@ -236,7 +236,7 @@ fn lhs(p: &mut Parser, r: Restrictions) -> Option<CompletedMarker> {
236 DOTDOT => { 236 DOTDOT => {
237 m = p.start(); 237 m = p.start();
238 p.bump(); 238 p.bump();
239 if EXPR_FIRST.contains(p.current()) { 239 if p.at_ts(EXPR_FIRST) {
240 expr_bp(p, r, 2); 240 expr_bp(p, r, 2);
241 } 241 }
242 return Some(m.complete(p, RANGE_EXPR)); 242 return Some(m.complete(p, RANGE_EXPR));
@@ -376,7 +376,7 @@ fn arg_list(p: &mut Parser) {
376 let m = p.start(); 376 let m = p.start();
377 p.bump(); 377 p.bump();
378 while !p.at(R_PAREN) && !p.at(EOF) { 378 while !p.at(R_PAREN) && !p.at(EOF) {
379 if !EXPR_FIRST.contains(p.current()) { 379 if !p.at_ts(EXPR_FIRST) {
380 p.error("expected expression"); 380 p.error("expected expression");
381 break; 381 break;
382 } 382 }
diff --git a/crates/libsyntax2/src/grammar/params.rs b/crates/libsyntax2/src/grammar/params.rs
index bc0cb44ba..903c25939 100644
--- a/crates/libsyntax2/src/grammar/params.rs
+++ b/crates/libsyntax2/src/grammar/params.rs
@@ -48,7 +48,7 @@ fn list_(p: &mut Parser, flavor: Flavor) {
48 opt_self_param(p); 48 opt_self_param(p);
49 } 49 }
50 while !p.at(EOF) && !p.at(ket) { 50 while !p.at(EOF) && !p.at(ket) {
51 if !VALUE_PARAMETER_FIRST.contains(p.current()) { 51 if !p.at_ts(VALUE_PARAMETER_FIRST) {
52 p.error("expected value parameter"); 52 p.error("expected value parameter");
53 break; 53 break;
54 } 54 }
diff --git a/crates/libsyntax2/src/grammar/patterns.rs b/crates/libsyntax2/src/grammar/patterns.rs
index aa20ae8e4..6dd3ab2fa 100644
--- a/crates/libsyntax2/src/grammar/patterns.rs
+++ b/crates/libsyntax2/src/grammar/patterns.rs
@@ -102,7 +102,7 @@ fn tuple_pat_fields(p: &mut Parser) {
102 match p.current() { 102 match p.current() {
103 DOTDOT => p.bump(), 103 DOTDOT => p.bump(),
104 _ => { 104 _ => {
105 if !PATTERN_FIRST.contains(p.current()) { 105 if !p.at_ts(PATTERN_FIRST) {
106 p.error("expected a pattern"); 106 p.error("expected a pattern");
107 break; 107 break;
108 } 108 }
diff --git a/crates/libsyntax2/src/parser_api.rs b/crates/libsyntax2/src/parser_api.rs
index c4753140e..7d97159dd 100644
--- a/crates/libsyntax2/src/parser_api.rs
+++ b/crates/libsyntax2/src/parser_api.rs
@@ -35,6 +35,11 @@ impl<'t> Parser<'t> {
35 self.current() == kind 35 self.current() == kind
36 } 36 }
37 37
38 /// Checks if the current token is `kind`.
39 pub(crate) fn at_ts(&self, kinds: TokenSet) -> bool {
40 kinds.contains(self.current())
41 }
42
38 pub(crate) fn next2(&self) -> Option<(SyntaxKind, SyntaxKind)> { 43 pub(crate) fn next2(&self) -> Option<(SyntaxKind, SyntaxKind)> {
39 self.0.next2() 44 self.0.next2()
40 } 45 }