Rockingcool/kleingrep
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Added case-insensitve flag

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This commit is contained in:
Aadhavan Srinivasan
2024-11-23 09:26:11 -05:00
parent 924e2a8dbc
commit c87a4b7136
1 changed files with 7 additions and 1 deletions

8
main.go

@@ -16,6 +16,7 @@ import (
const CONCAT rune = '~' const CONCAT rune = '~'
var notDotChars []rune var notDotChars []rune
var caseInsensitiveFlag *bool // Whether we are running in case-insensitive mode
func isOperator(c rune) bool { func isOperator(c rune) bool {
if c == '+' || c == '?' || c == '*' || c == '|' || c == CONCAT { if c == '+' || c == '?' || c == '*' || c == '|' || c == CONCAT {
@@ -155,7 +156,11 @@ func shuntingYard(re string) []postfixNode {
*/ */
c := re_postfix[i] c := re_postfix[i]
if isNormalChar(c) { if isNormalChar(c) {
outQueue = append(outQueue, newPostfixNode(c)) if *caseInsensitiveFlag {
outQueue = append(outQueue, newPostfixNode(allCases(c)...))
} else {
outQueue = append(outQueue, newPostfixNode(c))
}
continue continue
} }
// Escape character // Escape character
@@ -501,6 +506,7 @@ func main() {
lineFlag := flag.Bool("l", false, "Only print lines with a match (or with no matches, if -v is enabled). Similar to grep's default.") lineFlag := flag.Bool("l", false, "Only print lines with a match (or with no matches, if -v is enabled). Similar to grep's default.")
multiLineFlag := flag.Bool("t", false, "Multi-line mode. Treats newline just like any character.") multiLineFlag := flag.Bool("t", false, "Multi-line mode. Treats newline just like any character.")
printMatchesFlag := flag.Bool("p", false, "Prints start and end index of each match. Can only be used with '-t' for multi-line mode.") printMatchesFlag := flag.Bool("p", false, "Prints start and end index of each match. Can only be used with '-t' for multi-line mode.")
caseInsensitiveFlag = flag.Bool("i", false, "Case-insensitive. Disregard the case of all characters.")
flag.Parse() flag.Parse()
// In multi-line mode, 'dot' metacharacter also matches newline // In multi-line mode, 'dot' metacharacter also matches newline