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Allow hyphen to be escaped inside character class

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This commit is contained in:
Aadhavan Srinivasan
2025-01-24 14:58:07 -05:00
parent c26edcb0c4
commit 45827b5dd3
1 changed files with 7 additions and 0 deletions
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7
postfixNode.go
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@@ -116,6 +116,13 @@ func newEscapedNode(c rune, inCharClass bool) (postfixNode, error) {
case 'v': // Vertical tab case 'v': // Vertical tab
toReturn.nodetype = CHARACTER toReturn.nodetype = CHARACTER
toReturn.contents = append(toReturn.contents, rune(11)) toReturn.contents = append(toReturn.contents, rune(11))
case '-': // Literal hyphen - only in character class
if inCharClass {
toReturn.nodetype = CHARACTER
toReturn.contents = append(toReturn.contents, '-')
} else {
return postfixNode{}, fmt.Errorf("Invalid escape character.")
}
default: // None of the above - append it as a regular character default: // None of the above - append it as a regular character
if isNormalChar(c) { // Normal characters cannot be escaped if isNormalChar(c) { // Normal characters cannot be escaped
return postfixNode{}, fmt.Errorf("Invalid escape character.") return postfixNode{}, fmt.Errorf("Invalid escape character.")