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[test] Add some additional regex parsing tests #41930

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Merged
merged 1 commit into from
Mar 22, 2022
Merged

[test] Add some additional regex parsing tests #41930

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8 changes: 8 additions & 0 deletions test/StringProcessing/Parse/regex.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -21,3 +21,11 @@ _ = re're\r\e\'\\'
_ = (#/[*/#, #/+]/#, #/.]/#)
// expected-error@-1 {{cannot parse regular expression: quantifier '+' must appear after expression}}
// expected-error@-2 {{cannot parse regular expression: expected ']'}}

// Make sure we can skip over `'` characters in the regex body.
_ = re'(?'xA0_-y1'x)'
_ = re'(?('xA0_')\')'
_ = re'\'(?('-20'))'
_ = re'\k'+2-1'\''
_ = re'\g'xA0_''
_ = re'(?C'9,3, pg(')'
39 changes: 36 additions & 3 deletions test/StringProcessing/Parse/regex_parse_error.swift
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Expand Up @@ -6,10 +6,43 @@ _ = re'(' // expected-error {{expected ')'}}
// FIXME: Should be 'group openings'
_ = re')' // expected-error {{closing ')' does not balance any groups openings}}

let s = #/\\/''/ // expected-error {{unterminated regex literal}}
_ = #/\\/''/ // expected-error {{unterminated regex literal}}
_ = #|\| // expected-error {{unterminated regex literal}}
_ = #// // expected-error {{unterminated regex literal}}
_ = re'x // expected-error {{unterminated regex literal}}

// expected-error@+1 {{unterminated regex literal}}
var unterminated = #/xy
_ = #/xy // expected-error {{unterminated regex literal}}

_ = re'(?' // expected-error {{expected group specifier}}

_ = re'(?'' // expected-error {{unterminated regex literal}}
// expected-error@-1 {{expected group name}}

_ = re'(?'abc' // expected-error {{unterminated regex literal}}
// expected-error@-1 {{expected ')'}}

// TODO: Maybe change "unterminated string literal" to "unterminated single quote"?
_ = re'(?'abc ' // expected-error {{unterminated string literal}}
// expected-error@-1 {{expected group specifier}}
// expected-error@-2 {{consecutive statements on a line must be separated by ';'}}

_ = re'(?'a // expected-error {{expected group specifier}}
// expected-error@-1 {{cannot find 'a' in scope}}
// expected-error@-2 {{consecutive statements on a line must be separated by ';'}}

_ = re'\(?'abc' // expected-error {{unterminated string literal}}
// expected-error@-1 {{consecutive statements on a line must be separated by ';'}}

_ = re'\
'
// expected-error@-2 {{unterminated regex literal}}
// expected-error@-3 {{expected escape sequence}}
// expected-error@-3 {{unterminated string literal}}

func foo<T>(_ x: T, _ y: T) {}
foo(re'(?', re'abc') // expected-error {{expected group specifier}}
foo(re'(?C', re'abc') // expected-error {{expected ')'}}

foo(re'(?'', re'abc') // expected-error {{expected group name}}
// expected-error@-1 {{unterminated string literal}}
// expected-error@-2 {{expected ',' separator}}