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Remove escaped chars, skip escaped {{ from expressions.

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This commit is contained in:
JonathanSteininger 2025-05-11 20:17:13 +12:00
parent 557241780c
commit 6cdd04cb86
1 changed files with 23 additions and 1 deletions
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24
src/config.cpp
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@ -645,7 +645,20 @@ CParseResult CConfig::parseLine(std::string line, bool dynamic) {
// parse expressions $(somevar + 2)
// We only support single expressions for now
while (RHS.contains("{{")) {
const auto BEGIN_EXPR = RHS.find("{{");
auto firstUnescaped = RHS.find("{{");
//keep searching until the escape char is not found.
while(RHS.at(firstUnescaped - 1) == '\\'){
firstUnescaped = RHS.find("{{", firstUnescaped + 1);
//escape if the next match is never found
if(firstUnescaped == std::string::npos)
break;
}
//real match was never found.
if(firstUnescaped == std::string::npos){
break;
}
const auto BEGIN_EXPR = firstUnescaped;
// }} doesnt need escaping. it would be valid if escaped anyways.
const auto END_EXPR = RHS.find("}}", BEGIN_EXPR + 2);
if (END_EXPR != std::string::npos) {
// try to parse the expression
@ -669,6 +682,15 @@ CParseResult CConfig::parseLine(std::string line, bool dynamic) {
}
}
// Removing escape chars. -- in the future, maybe map all the chars that can be escaped.
// Right now only expression parsing has escapeable chars
for(long i = 0; i < (long)RHS.length()-(long)1; i++){
if(RHS.at(i) == '\\' && (RHS.at(i+1) == '{' || RHS.at(i+1) == '}')){
RHS.erase(i--, 1);
continue;
}
}
if (ISVARIABLE)
return parseVariable(LHS, RHS, dynamic);