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Safer errors

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This commit is contained in:
Aleksey Kladov 2018-08-13 18:30:56 +03:00
parent c1a7b72fb7
commit 51f7f937a5
3 changed files with 22 additions and 21 deletions
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4
crates/libsyntax2/src/grammar/mod.rs
View file

@ -129,7 +129,7 @@ fn name(p: &mut Parser) {
p.bump();
m.complete(p, NAME);
} else {
p.error("expected a name");
p.err_and_bump("expected a name");
}
}
@ -139,7 +139,7 @@ fn name_ref(p: &mut Parser) {
p.bump();
m.complete(p, NAME_REF);
} else {
p.error("expected identifier");
p.err_and_bump("expected identifier");
}
}

5
crates/libsyntax2/src/grammar/patterns.rs
View file

@ -117,11 +117,8 @@ fn struct_pat_fields(p: &mut Parser) {
p.bump();
pattern(p);
}
REF_KW | MUT_KW | IDENT => {
bind_pat(p, false);
},
_ => {
p.err_and_bump("expected ident");
bind_pat(p, false);
}
}
if !p.at(R_CURLY) {

34
crates/libsyntax2/tests/data/parser/ok/0030_traits.txt
View file

@ -97,19 +97,21 @@ FILE@[0; 164)
WHITESPACE@[125; 126)
L_CURLY@[126; 127)
WHITESPACE@[127; 132)
err: `expected ident`
ERROR@[132; 134)
FN_KW@[132; 134)
err: `expected COMMA`
err: `expected a name`
BIND_PAT@[132; 134)
ERROR@[132; 134)
FN_KW@[132; 134)
err: `expected COMMA`
WHITESPACE@[134; 135)
BIND_PAT@[135; 147)
NAME@[135; 147)
IDENT@[135; 147) "fn_with_expr"
err: `expected COMMA`
err: `expected ident`
ERROR@[147; 148)
L_PAREN@[147; 148)
err: `expected COMMA`
err: `expected a name`
BIND_PAT@[147; 148)
ERROR@[147; 148)
L_PAREN@[147; 148)
err: `expected COMMA`
IDENT@[148; 149) "x"
COLON@[149; 150)
WHITESPACE@[150; 151)
@ -128,13 +130,15 @@ FILE@[0; 164)
INT_NUMBER@[157; 158) "1"
R_BRACK@[158; 159)
err: `expected COMMA`
err: `expected ident`
ERROR@[159; 160)
R_PAREN@[159; 160)
err: `expected COMMA`
err: `expected ident`
ERROR@[160; 161)
SEMI@[160; 161)
err: `expected a name`
BIND_PAT@[159; 160)
ERROR@[159; 160)
R_PAREN@[159; 160)
err: `expected COMMA`
err: `expected a name`
BIND_PAT@[160; 161)
ERROR@[160; 161)
SEMI@[160; 161)
WHITESPACE@[161; 162)
R_CURLY@[162; 163)
err: `expected COLON`