Lexer.h

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// SPDX-License-Identifier: MIT
 
#pragma once
 
#include <exception>
#include <memory>
#include <optional>
#include <string>
#include <utility>
#include <vector>
 
#include "mini-llvm/ir_reader/Token.h"
#include "mini-llvm/utils/Compiler.h"
 
namespace mini_llvm::ir {
 
class LexException : public std::exception {
public:
    LexException(std::string message, const char *location)
        : message_(std::move(message)), location_(location) {}
 
    const std::string &message() const & {
        return message_;
    }
 
    std::string &&message() && {
        return std::move(message_);
    }
 
    const char *location() const {
        return location_;
    }
 
    const char *what() const noexcept override {
        return "LexException";
    }
 
private:
    std::string message_;
    const char *location_;
};
 
class MINI_LLVM_EXPORT Lexer {
public:
    explicit Lexer(const char *current);
 
    ~Lexer();
 
    Lexer(Lexer &&) noexcept;
    Lexer &operator=(Lexer &&) noexcept;
 
    std::optional<Token> lastToken();
    Token nextToken();
 
private:
    class Impl;
 
    std::unique_ptr<Impl> impl_;
};
 
MINI_LLVM_EXPORT std::vector<Token> lex(const char *source);
 
} // namespace mini_llvm::ir