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add hex support

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This commit is contained in:
blueloveTH 2022-11-13 18:48:30 +08:00
parent dcc899a884
commit 80c8c837c4
1 changed files with 14 additions and 5 deletions
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19
src/compiler.h
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@ -140,26 +140,35 @@ public:
}
void eatNumber() {
static const std::regex pattern("^([0-9]+)(\\.[0-9]+)?");
static const std::regex pattern("^(0x)?[0-9a-f]+(\\.[0-9]+)?");
std::smatch m;
const char* i = parser->token_start;
while(*i != '\n' && *i != '\0') i++;
std::string s = std::string(parser->token_start, i);
size_t* size = new size_t;
try{
if (std::regex_search(s, m, pattern)) {
// here is m.length()-1, since the first char is eaten by lexToken()
for(int j=0; j<m.length()-1; j++) parser->eatChar();
int base = 10;
if (m[1].matched) base = 16;
if (m[2].matched) {
parser->setNextToken(TK("@num"), vm->PyFloat(std::stod(m[0])));
if(base == 16) syntaxError("hex literal should not contain a dot");
parser->setNextToken(TK("@num"), vm->PyFloat(std::stod(m[0], size)));
} else {
parser->setNextToken(TK("@num"), vm->PyInt(std::stoll(m[0])));
}
parser->setNextToken(TK("@num"), vm->PyInt(std::stoll(m[0], size, base)));
}
if (*size != m.length()) throw std::runtime_error("length mismatch");
delete size;
}
}catch(std::exception& e){
delete size;
syntaxError("invalid number literal");
}
}
}
// Lex the next token and set it as the next token.