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Implement character escape sequences

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This commit is contained in:
Eugen Wissner
2025-01-22 20:19:26 +01:00
parent 156506e8fa
commit 0dc95d4466
7 changed files with 83 additions and 52 deletions
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45
source/lexer.ll
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@@ -112,13 +112,50 @@ return {
[0-9]+\.[0-9] {
return yy::parser::make_FLOAT(strtof(yytext, NULL), this->location);
}
'[^']' {
return yy::parser::make_CHARACTER(
std::string(yytext, 1, strlen(yytext) - 2), this->location);
'[[:print:]]' {
if (yytext[1] == '\\')
{
REJECT;
}
else
{
return yy::parser::make_CHARACTER(std::string(yytext, 1, 1), this->location);
}
}
'\\[0nabtfrv\\'"?]' {
switch (yytext[2])
{
case 'n':
return yy::parser::make_CHARACTER(std::string("\n"), this->location);
case 'a':
return yy::parser::make_CHARACTER(std::string("\a"), this->location);
case 'b':
return yy::parser::make_CHARACTER(std::string("\b"), this->location);
case 't':
return yy::parser::make_CHARACTER(std::string("\t"), this->location);
case 'f':
return yy::parser::make_CHARACTER(std::string("\f"), this->location);
case 'r':
return yy::parser::make_CHARACTER(std::string("\r"), this->location);
case 'v':
return yy::parser::make_CHARACTER(std::string("\v"), this->location);
case '\\':
return yy::parser::make_CHARACTER(std::string("\\"), this->location);
case '\'':
return yy::parser::make_CHARACTER(std::string("'"), this->location);
case '"':
return yy::parser::make_CHARACTER(std::string("\""), this->location);
case '?':
return yy::parser::make_CHARACTER(std::string("\?"), this->location);
case '0':
return yy::parser::make_CHARACTER(std::string("\0", 1), this->location);
default:
REJECT;
}
}
\"[^\"]*\" {
return yy::parser::make_STRING(
std::string(yytext, 1, strlen(yytext) - 2), this->location);
std::string(yytext, 1, strlen(yytext) - 2), this->location);
}
\( {
return yy::parser::make_LEFT_PAREN(this->location);