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Added backslash-capital-B support to regex parser

This commit is contained in:
Andrew S. Rightenburg 2023-08-23 22:07:33 -04:00
parent 5d9c26ffaa
commit 6fcc99ef02
Signed by: rail5
GPG Key ID: A0CB570AB6629159
1 changed files with 35 additions and 1 deletions
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36
shared/parse_regex.cpp
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@ -40,6 +40,9 @@ std::vector<std::string> parse_regex(std::string expression) {
// A flag to set when we hit backslash-b (\b), signifying "start of word"
bool backslash_b = false;
// A flag to set when we hit backslash-B (\B), signifying "NOT start of word"
bool backslash_capital_b = false;
// A flag to set when we're entering multiple characters into one element of the vector
bool multi_char_entry = false;
@ -60,7 +63,7 @@ std::vector<std::string> parse_regex(std::string expression) {
std::string part(1, c);
int current_index = parsed_expression.size()-1;
if (square_brackets_open || parentheses_level > 0 || escaped || caret || backslash_b) {
if (square_brackets_open || parentheses_level > 0 || escaped || caret || backslash_b || backslash_capital_b) {
multi_char_entry = true;
} else {
multi_char_entry = false;
@ -83,6 +86,7 @@ std::vector<std::string> parse_regex(std::string expression) {
caret = false;
backslash_b = false;
backslash_capital_b = false;
break;
case '[':
if (multi_char_entry) {
@ -98,6 +102,7 @@ std::vector<std::string> parse_regex(std::string expression) {
escaped = false;
caret = false;
backslash_b = false;
backslash_capital_b = false;
break;
case ']':
@ -114,6 +119,7 @@ std::vector<std::string> parse_regex(std::string expression) {
escaped = false;
caret = false;
backslash_b = false;
backslash_capital_b = false;
break;
case '(':
@ -130,6 +136,7 @@ std::vector<std::string> parse_regex(std::string expression) {
escaped = false;
caret = false;
backslash_b = false;
backslash_capital_b = false;
break;
case ')':
@ -146,6 +153,7 @@ std::vector<std::string> parse_regex(std::string expression) {
escaped = false;
caret = false;
backslash_b = false;
backslash_capital_b = false;
break;
case '{':
@ -163,6 +171,7 @@ std::vector<std::string> parse_regex(std::string expression) {
escaped = false;
caret = false;
backslash_b = false;
backslash_capital_b = false;
break;
case '}':
@ -186,6 +195,7 @@ std::vector<std::string> parse_regex(std::string expression) {
escaped = false;
caret = false;
backslash_b = false;
backslash_capital_b = false;
break;
case '+':
@ -194,6 +204,7 @@ std::vector<std::string> parse_regex(std::string expression) {
escaped = false;
caret = false;
backslash_b = false;
backslash_capital_b = false;
break;
case '*':
@ -202,6 +213,7 @@ std::vector<std::string> parse_regex(std::string expression) {
escaped = false;
caret = false;
backslash_b = false;
backslash_capital_b = false;
break;
case '?':
@ -210,6 +222,7 @@ std::vector<std::string> parse_regex(std::string expression) {
escaped = false;
caret = false;
backslash_b = false;
backslash_capital_b = false;
break;
case '^':
@ -225,6 +238,7 @@ std::vector<std::string> parse_regex(std::string expression) {
escaped = false;
backslash_b = false;
backslash_capital_b = false;
break;
case '$':
@ -233,6 +247,7 @@ std::vector<std::string> parse_regex(std::string expression) {
escaped = false;
caret = false;
backslash_b = false;
backslash_capital_b = false;
break;
case 'b':
@ -248,6 +263,24 @@ std::vector<std::string> parse_regex(std::string expression) {
parsed_expression.push_back(part);
}
escaped = false;
caret = false;
backslash_capital_b = false;
break;
case 'B':
if (escaped) {
backslash_capital_b = true;
} else {
backslash_capital_b = false;
}
if (multi_char_entry) {
parsed_expression[current_index] += part;
} else {
parsed_expression.push_back(part);
}
escaped = false;
caret = false;
break;
@ -306,6 +339,7 @@ std::vector<std::string> parse_regex(std::string expression) {
escaped = false;
caret = false;
backslash_b = false;
backslash_capital_b = false;
}
}