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#ifndef WILLOWC_INCLUDE_TOKENIZER_HPP
#define WILLOWC_INCLUDE_TOKENIZER_HPP
#include <willow/IR/Location.h>
namespace willowc {
enum class TokenKind {
Function,
Variable,
Constant,
Type,
Label,
Inst,
Comma,
Semicolon,
LParen,
RParen,
LCurly,
RCurly,
Equals,
RArrow,
Comment,
FuncKW,
Eof,
Invalid,
};
struct Token {
std::size_t start, end;
TokenKind kind;
};
class Tokenizer {
std::string_view buf;
std::size_t offset;
void skip(std::size_t idx = 1) { offset += idx; }
char eat(std::size_t num = 1) {
if (offset >= buf.length())
return '\0';
char c = buf[offset];
offset += num;
return c;
}
char peek(std::size_t idx = 0) {
if (offset + idx >= buf.length())
return '\0';
return buf[offset + idx];
}
bool scan_id(bool accept_digits);
bool scan_dec();
bool scan_hex();
bool scan_constant();
public:
explicit Tokenizer(std::string_view buf, std::size_t offset = 0)
: buf{buf}, offset{offset} {}
Token scan();
void seek(uint64_t offset);
};
} // namespace willowc
#endif // WILLOWC_INCLUDE_TOKENIZER_HPP
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