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Add support for character ranges in regex patterns

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This commit is contained in:
Max Brunsfeld 2014-01-30 18:54:39 -08:00
parent 60e2d00b4d
commit 0d3a941848
11 changed files with 174 additions and 156 deletions
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20
src/compiler/generate_code/c_code.cpp
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@ -102,28 +102,30 @@ namespace tree_sitter {
}
string condition_for_character_match(const rules::CharacterMatch &match) {
auto value = "LOOKAHEAD_CHAR()";
string lookahead("LOOKAHEAD_CHAR()");
auto value = match.value;
switch (match.type) {
case rules::CharacterMatchTypeClass:
switch (match.value.character_class) {
switch (value.character_class) {
case rules::CharClassDigit:
return string("isdigit(") + value + ")";
return string("isdigit(") + lookahead + ")";
case rules::CharClassWord:
return string("isalnum(") + value + ")";
return string("isalnum(") + lookahead + ")";
}
case rules::CharacterMatchTypeSpecific:
return string(value) + " == '" + character_code(match.value.character) + "'";
default:
return "";
return lookahead + " == '" + character_code(value.character) + "'";
case rules::CharacterMatchTypeRange:
return string("'") + value.range.min_character + string("' <= ") + lookahead +
" && " + lookahead + " <= '" + value.range.max_character + "'";
}
}
string condition_for_character_rule(const rules::Character &rule) {
vector<string> parts;
for (auto &match : rule.matches) {
parts.push_back(condition_for_character_match(match));
parts.push_back("(" + condition_for_character_match(match) + ")");
}
string result = join(parts, " || ");
string result = join(parts, " ||\n ");
if (!rule.sign) result = "!(" + result + ")";
return result;
}