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DanielRosenwasserDanielRosenwasser
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Rephrase error messages on backrererences. (#58310)
1 parent 501fa6e commit ed87791

15 files changed

+671
-546
lines changed

‎src/compiler/diagnosticMessages.json‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -1785,11 +1785,11 @@
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"category": "Error",
17861786
"code": 1532
17871787
},
1788-
"A decimal escape must refer to an existent capturing group. There are only {0} capturing groups in this regular expression.": {
1788+
"This backreference refers to a group that does not exist. There are only {0} capturing groups in this regular expression.": {
17891789
"category": "Error",
17901790
"code": 1533
17911791
},
1792-
"Decimal escapes are invalid when there are no capturing groups in a regular expression.": {
1792+
"This backreference is invalid because the containing regular expression contains no capturing groups.": {
17931793
"category": "Error",
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"code": 1534
17951795
},

‎src/compiler/scanner.ts‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -3438,10 +3438,10 @@ export function createScanner(languageVersion: ScriptTarget, skipTrivia: boolean
34383438
// either a LegacyOctalEscapeSequence or IdentityEscape
34393439
if (!annexB && escape.value > numberOfCapturingGroups) {
34403440
if (numberOfCapturingGroups) {
3441-
error(Diagnostics.A_decimal_escape_must_refer_to_an_existent_capturing_group_There_are_only_0_capturing_groups_in_this_regular_expression, escape.pos, escape.end - escape.pos, numberOfCapturingGroups);
3441+
error(Diagnostics.This_backreference_refers_to_a_group_that_does_not_exist_There_are_only_0_capturing_groups_in_this_regular_expression, escape.pos, escape.end - escape.pos, numberOfCapturingGroups);
34423442
}
34433443
else {
3444-
error(Diagnostics.Decimal_escapes_are_invalid_when_there_are_no_capturing_groups_in_a_regular_expression, escape.pos, escape.end - escape.pos);
3444+
error(Diagnostics.This_backreference_is_invalid_because_the_containing_regular_expression_contains_no_capturing_groups, escape.pos, escape.end - escape.pos);
34453445
}
34463446
}
34473447
});

‎tests/baselines/reference/regularExpressionScanning(target=es2015).errors.txt‎

Lines changed: 189 additions & 184 deletions
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‎tests/baselines/reference/regularExpressionScanning(target=es2015).js‎

Lines changed: 10 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -7,6 +7,11 @@ const regexes: RegExp[] = [
77
// Pattern modifiers
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/(?med-ium:bar)/,
99
// Capturing groups
10+
/\0/,
11+
/\1/,
12+
/\2/,
13+
/(hi)\1/,
14+
/(hi) (hello) \2/,
1015
/\2()(\12)(foo)\1\0[\0\1\01\123](\3\03)\5\005/,
1116
/\2()(\12)(foo)\1\0[\0\1\01\123](\3\03)\5\005/u,
1217
/(?<foo>)((?<bar>bar)bar)(?<baz>baz)|(foo(?<foo>foo))(?<baz>)/,
@@ -53,6 +58,11 @@ const regexes = [
5358
// Pattern modifiers
5459
/(?med-ium:bar)/,
5560
// Capturing groups
61+
/\0/,
62+
/\1/,
63+
/\2/,
64+
/(hi)\1/,
65+
/(hi) (hello) \2/,
5666
/\2()(\12)(foo)\1\0[\0\1\01\123](\3\03)\5\005/,
5767
/\2()(\12)(foo)\1\0[\0\1\01\123](\3\03)\5\005/u,
5868
/(?<foo>)((?<bar>bar)bar)(?<baz>baz)|(foo(?<foo>foo))(?<baz>)/,

‎tests/baselines/reference/regularExpressionScanning(target=es2015).symbols‎

Lines changed: 5 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -10,6 +10,11 @@ const regexes: RegExp[] = [
1010
// Pattern modifiers
1111
/(?med-ium:bar)/,
1212
// Capturing groups
13+
/\0/,
14+
/\1/,
15+
/\2/,
16+
/(hi)\1/,
17+
/(hi) (hello) \2/,
1318
/\2()(\12)(foo)\1\0[\0\1\01\123](\3\03)\5\005/,
1419
/\2()(\12)(foo)\1\0[\0\1\01\123](\3\03)\5\005/u,
1520
/(?<foo>)((?<bar>bar)bar)(?<baz>baz)|(foo(?<foo>foo))(?<baz>)/,

‎tests/baselines/reference/regularExpressionScanning(target=es2015).types‎

Lines changed: 22 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -4,8 +4,8 @@
44
const regexes: RegExp[] = [
55
>regexes : RegExp[]
66
> : ^^^^^^^^
7-
>[ // Flags /foo/visualstudiocode, // Pattern modifiers /(?med-ium:bar)/, // Capturing groups /\2()(\12)(foo)\1\0[\0\1\01\123](\3\03)\5\005/, /\2()(\12)(foo)\1\0[\0\1\01\123](\3\03)\5\005/u, /(?<foo>)((?<bar>bar)bar)(?<baz>baz)|(foo(?<foo>foo))(?<baz>)/, /(\k<bar>)\k<absent>(?<foo>foo)|(?<bar>)((?<foo>)|(bar(?<bar>bar)))/, // Quantifiers /{}{1,2}_{3}.{4,}?(foo){008}${32,16}\b{064,128}.+&*?\???\n{,256}{\\{,/, // Character classes /[-A-Za-z-z-aZ-A\d_-\d-.-.\r-\n\w-\W]/, /\p{L}\p{gc=L}\p{ASCII}\p{Invalid}[\p{L}\p{gc=L}\P{ASCII}\p{Invalid}]/, /\p{L}\p{gc=L}\p{ASCII}\p{Invalid}[\p{L}\p{gc=L}\P{ASCII}\p{Invalid}]/u, /\p{L}\p{gc=L}\p{ASCII}\p{Invalid}[\p{L}\p{gc=L}\P{ASCII}\p{Invalid}]/v, /\p{InvalidProperty=Value}\p{=}\p{sc=}\P{=foo}[\p{}\p\\\P\P{]\p{/, /\p{InvalidProperty=Value}\p{=}\p{sc=}\P{=foo}[\p{}\p\\\P\P{]\p{/u, /\p{InvalidProperty=Value}\p{=}\p{sc=}\P{=foo}[\p{}\p\\\P\P{]\p{/v, /\p{RGI_Emoji}\P{RGI_Emoji}[^\p{RGI_Emoji}\P{RGI_Emoji}]/, /\p{RGI_Emoji}\P{RGI_Emoji}[^\p{RGI_Emoji}\P{RGI_Emoji}]/u, /\p{RGI_Emoji}\P{RGI_Emoji}[^\p{RGI_Emoji}\P{RGI_Emoji}]/v, // Character escapes /\c[\c0\ca\cQ\c\C]\c1\C/, /\c[\c0\ca\cQ\c\C]\c1\C/u, /\q\\\`[\q\\\`[\Q\\\Q{\q{foo|bar|baz]\q{]\q{/, /\q\\\`[\q\\\`[\Q\\\Q{\q{foo|bar|baz]\q{]\q{/u, /\q\\\`[\q\\\`[\Q\\\Q{\q{foo|bar|baz]\q{]\q{/v, // Unicode sets notation /[a--b[--][\d++[]]&&[[&0-9--]&&[\p{L}]--\P{L}-_-]]&&&\q{foo}[0---9][&&q&&&\q{bar}&&]/, /[a--b[--][\d++[]]&&[[&0-9--]&&[\p{L}]--\P{L}-_-]]&&&\q{foo}[0---9][&&q&&&\q{bar}&&]/u, /[a--b[--][\d++[]]&&[[&0-9--]&&[\p{L}]--\P{L}-_-]]&&&\q{foo}[0---9][&&q&&&\q{bar}&&]/v, /[[^\P{Decimal_Number}&&[0-9]]&&\p{L}&&\p{ID_Continue}--\p{ASCII}\p{CWCF}]/v, /[^\p{Emoji}\p{RGI_Emoji}][^\p{Emoji}--\p{RGI_Emoji}][^\p{Emoji}&&\p{RGI_Emoji}]/v, /[^\p{RGI_Emoji}\p{Emoji}][^\p{RGI_Emoji}--\p{Emoji}][^\p{RGI_Emoji}&&\p{Emoji}]/v, /[^\p{RGI_Emoji}\q{foo}][^\p{RGI_Emoji}--\q{foo}][^\p{RGI_Emoji}&&\q{foo}]/v, /[^\p{Emoji}[[\p{RGI_Emoji}]]][^\p{Emoji}--[[\p{RGI_Emoji}]]][^\p{Emoji}&&[[\p{RGI_Emoji}]]]/v, /[^[[\p{RGI_Emoji}]]\p{Emoji}][^[[\p{RGI_Emoji}]]--\p{Emoji}][^[[\p{RGI_Emoji}]]&&\p{Emoji}]/v, /[^[[\p{RGI_Emoji}]]\q{foo}][^[[\p{RGI_Emoji}]]--\q{foo}][^[[\p{RGI_Emoji}]]&&\q{foo}]/v, /[^\q{foo|bar|baz}--\q{foo}--\q{bar}--\q{baz}][^\p{L}--\q{foo}--[\q{bar}]--[^[\q{baz}]]]/v, /[^[[\q{foo|bar|baz}]]--\q{foo}--\q{bar}--\q{baz}][^[^[^\p{L}]]--\q{foo}--[\q{bar}]--[^[\q{baz}]]]/v,] : RegExp[]
8-
> : ^^^^^^^^
7+
>[ // Flags /foo/visualstudiocode, // Pattern modifiers /(?med-ium:bar)/, // Capturing groups /\0/, /\1/, /\2/, /(hi)\1/, /(hi) (hello) \2/, /\2()(\12)(foo)\1\0[\0\1\01\123](\3\03)\5\005/, /\2()(\12)(foo)\1\0[\0\1\01\123](\3\03)\5\005/u, /(?<foo>)((?<bar>bar)bar)(?<baz>baz)|(foo(?<foo>foo))(?<baz>)/, /(\k<bar>)\k<absent>(?<foo>foo)|(?<bar>)((?<foo>)|(bar(?<bar>bar)))/, // Quantifiers /{}{1,2}_{3}.{4,}?(foo){008}${32,16}\b{064,128}.+&*?\???\n{,256}{\\{,/, // Character classes /[-A-Za-z-z-aZ-A\d_-\d-.-.\r-\n\w-\W]/, /\p{L}\p{gc=L}\p{ASCII}\p{Invalid}[\p{L}\p{gc=L}\P{ASCII}\p{Invalid}]/, /\p{L}\p{gc=L}\p{ASCII}\p{Invalid}[\p{L}\p{gc=L}\P{ASCII}\p{Invalid}]/u, /\p{L}\p{gc=L}\p{ASCII}\p{Invalid}[\p{L}\p{gc=L}\P{ASCII}\p{Invalid}]/v, /\p{InvalidProperty=Value}\p{=}\p{sc=}\P{=foo}[\p{}\p\\\P\P{]\p{/, /\p{InvalidProperty=Value}\p{=}\p{sc=}\P{=foo}[\p{}\p\\\P\P{]\p{/u, /\p{InvalidProperty=Value}\p{=}\p{sc=}\P{=foo}[\p{}\p\\\P\P{]\p{/v, /\p{RGI_Emoji}\P{RGI_Emoji}[^\p{RGI_Emoji}\P{RGI_Emoji}]/, /\p{RGI_Emoji}\P{RGI_Emoji}[^\p{RGI_Emoji}\P{RGI_Emoji}]/u, /\p{RGI_Emoji}\P{RGI_Emoji}[^\p{RGI_Emoji}\P{RGI_Emoji}]/v, // Character escapes /\c[\c0\ca\cQ\c\C]\c1\C/, /\c[\c0\ca\cQ\c\C]\c1\C/u, /\q\\\`[\q\\\`[\Q\\\Q{\q{foo|bar|baz]\q{]\q{/, /\q\\\`[\q\\\`[\Q\\\Q{\q{foo|bar|baz]\q{]\q{/u, /\q\\\`[\q\\\`[\Q\\\Q{\q{foo|bar|baz]\q{]\q{/v, // Unicode sets notation /[a--b[--][\d++[]]&&[[&0-9--]&&[\p{L}]--\P{L}-_-]]&&&\q{foo}[0---9][&&q&&&\q{bar}&&]/, /[a--b[--][\d++[]]&&[[&0-9--]&&[\p{L}]--\P{L}-_-]]&&&\q{foo}[0---9][&&q&&&\q{bar}&&]/u, /[a--b[--][\d++[]]&&[[&0-9--]&&[\p{L}]--\P{L}-_-]]&&&\q{foo}[0---9][&&q&&&\q{bar}&&]/v, /[[^\P{Decimal_Number}&&[0-9]]&&\p{L}&&\p{ID_Continue}--\p{ASCII}\p{CWCF}]/v, /[^\p{Emoji}\p{RGI_Emoji}][^\p{Emoji}--\p{RGI_Emoji}][^\p{Emoji}&&\p{RGI_Emoji}]/v, /[^\p{RGI_Emoji}\p{Emoji}][^\p{RGI_Emoji}--\p{Emoji}][^\p{RGI_Emoji}&&\p{Emoji}]/v, /[^\p{RGI_Emoji}\q{foo}][^\p{RGI_Emoji}--\q{foo}][^\p{RGI_Emoji}&&\q{foo}]/v, /[^\p{Emoji}[[\p{RGI_Emoji}]]][^\p{Emoji}--[[\p{RGI_Emoji}]]][^\p{Emoji}&&[[\p{RGI_Emoji}]]]/v, /[^[[\p{RGI_Emoji}]]\p{Emoji}][^[[\p{RGI_Emoji}]]--\p{Emoji}][^[[\p{RGI_Emoji}]]&&\p{Emoji}]/v, /[^[[\p{RGI_Emoji}]]\q{foo}][^[[\p{RGI_Emoji}]]--\q{foo}][^[[\p{RGI_Emoji}]]&&\q{foo}]/v, /[^\q{foo|bar|baz}--\q{foo}--\q{bar}--\q{baz}][^\p{L}--\q{foo}--[\q{bar}]--[^[\q{baz}]]]/v, /[^[[\q{foo|bar|baz}]]--\q{foo}--\q{bar}--\q{baz}][^[^[^\p{L}]]--\q{foo}--[\q{bar}]--[^[\q{baz}]]]/v,] : RegExp[]
8+
> : ^^^^^^^^
99

1010
// Flags
1111
/foo/visualstudiocode,
@@ -18,6 +18,26 @@ const regexes: RegExp[] = [
1818
> : ^^^^^^
1919

2020
// Capturing groups
21+
/\0/,
22+
>/\0/ : RegExp
23+
> : ^^^^^^
24+
25+
/\1/,
26+
>/\1/ : RegExp
27+
> : ^^^^^^
28+
29+
/\2/,
30+
>/\2/ : RegExp
31+
> : ^^^^^^
32+
33+
/(hi)\1/,
34+
>/(hi)\1/ : RegExp
35+
> : ^^^^^^
36+
37+
/(hi) (hello) \2/,
38+
>/(hi) (hello) \2/ : RegExp
39+
> : ^^^^^^
40+
2141
/\2()(\12)(foo)\1\0[\0\1\01\123](\3\03)\5\005/,
2242
>/\2()(\12)(foo)\1\0[\0\1\01\123](\3\03)\5\005/ : RegExp
2343
> : ^^^^^^

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