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docs: update the comment and add a test to half_open_range_pat

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This commit is contained in:
Dezhi Wu 2022-12-16 10:44:25 +08:00
parent 6a295fcd3b
commit 258e532434
3 changed files with 55 additions and 0 deletions
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7
crates/parser/src/grammar/patterns.rs
View file

@ -126,6 +126,8 @@ fn pattern_single_r(p: &mut Parser<'_>, recovery_set: TokenSet) {
// ^
// `[0..]`
// ^
// `0 .. if`
// ^
if matches!(
p.current(),
T![=] | T![,] | T![:] | T![')'] | T!['}'] | T![']'] | T![if]
@ -134,6 +136,11 @@ fn pattern_single_r(p: &mut Parser<'_>, recovery_set: TokenSet) {
// fn f() {
// let 0 .. = 1u32;
// let 0..: _ = 1u32;
//
// match 42 {
// 0 .. if true => (),
// _ => (),
// }
// }
} else {
atom_pat(p, recovery_set);

43
crates/parser/test_data/parser/inline/ok/0166_half_open_range_pat.rast
View file

@ -46,6 +46,49 @@ SOURCE_FILE
LITERAL
INT_NUMBER "1u32"
SEMICOLON ";"
WHITESPACE "\n\n "
MATCH_EXPR
MATCH_KW "match"
WHITESPACE " "
LITERAL
INT_NUMBER "42"
WHITESPACE " "
MATCH_ARM_LIST
L_CURLY "{"
WHITESPACE "\n "
MATCH_ARM
RANGE_PAT
LITERAL_PAT
LITERAL
INT_NUMBER "0"
WHITESPACE " "
DOT2 ".."
WHITESPACE " "
MATCH_GUARD
IF_KW "if"
WHITESPACE " "
LITERAL
TRUE_KW "true"
WHITESPACE " "
FAT_ARROW "=>"
WHITESPACE " "
TUPLE_EXPR
L_PAREN "("
R_PAREN ")"
COMMA ","
WHITESPACE "\n "
MATCH_ARM
WILDCARD_PAT
UNDERSCORE "_"
WHITESPACE " "
FAT_ARROW "=>"
WHITESPACE " "
TUPLE_EXPR
L_PAREN "("
R_PAREN ")"
COMMA ","
WHITESPACE "\n "
R_CURLY "}"
WHITESPACE "\n"
R_CURLY "}"
WHITESPACE "\n"

5
crates/parser/test_data/parser/inline/ok/0166_half_open_range_pat.rs
View file

@ -1,4 +1,9 @@
fn f() {
let 0 .. = 1u32;
let 0..: _ = 1u32;
match 42 {
0 .. if true => (),
_ => (),
}
}