62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
|
#pragma once
|
||
|
|
#ifndef LEXER_{{name}}_H
|
||
|
|
#define LEXER_{{name}}_H
|
||
|
|
|
||
|
|
#include <exception>
|
||
|
|
#include <istream>
|
||
|
|
#include <string>
|
||
|
|
|
||
|
|
class {{name}} {
|
||
|
|
public:
|
||
|
|
class NoMoreTokens : public std::exception {};
|
||
|
|
class NoMatch : public std::exception {};
|
||
|
|
|
||
|
|
enum TokenType {
|
||
|
|
nonmatching,
|
||
|
|
{{#token_types}}
|
||
|
|
{{type}},
|
||
|
|
{{/token_types}}
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Token {
|
||
|
|
TokenType type;
|
||
|
|
std::string content;
|
||
|
|
};
|
||
|
|
|
||
|
|
{{name}}(std::istream& in);
|
||
|
|
~{{name}}();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get the next token
|
||
|
|
*
|
||
|
|
* @throws NoMoreTokens if no more tokens are available
|
||
|
|
* @throws NoMatch if no match was found
|
||
|
|
*/
|
||
|
|
Token nextToken();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Skip the following `n` bytes.
|
||
|
|
*
|
||
|
|
* @param n The number of bytes to skip
|
||
|
|
*/
|
||
|
|
void skip(std::size_t n);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Peek at the current head of the input stream, useful in error reporting when a character mismatches for example
|
||
|
|
*
|
||
|
|
* @throws NoMoreTokens if the input stream is at an end
|
||
|
|
*/
|
||
|
|
char peek();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get the current byte offset
|
||
|
|
*/
|
||
|
|
std::size_t getByteOffset();
|
||
|
|
|
||
|
|
private:
|
||
|
|
std::size_t m_offset;
|
||
|
|
std::istream& m_input;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif //LEXER_{{name}}_H
|