73 lines
2.2 KiB
C++
73 lines
2.2 KiB
C++
/*
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* This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
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*
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* 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
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*
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* 3. This notice may not be removed or altered from any source distribution.
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*/
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#pragma once
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#ifndef LEXER_{{name}}_H
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#define LEXER_{{name}}_H
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#include <exception>
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#include <istream>
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#include <string>
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class {{name}} {
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public:
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class NoMoreTokens : public std::exception {};
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class NoMatch : public std::exception {};
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enum TokenType {
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nonmatching,
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{{#token_types}}
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{{type}},
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{{/token_types}}
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};
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struct Token {
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TokenType type;
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std::string content;
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};
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{{name}}(std::istream& in);
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~{{name}}();
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/**
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* Get the next token
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*
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* @throws NoMoreTokens if no more tokens are available
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* @throws NoMatch if no match was found
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*/
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Token nextToken();
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/**
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* Skip the following `n` bytes.
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*
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* @param n The number of bytes to skip
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*/
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void skip(std::size_t n);
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/**
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* Peek at the current head of the input stream, useful in error reporting when a character mismatches for example
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*
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* @throws NoMoreTokens if the input stream is at an end
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*/
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char peek();
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/**
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* Get the current byte offset
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*/
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std::size_t getByteOffset();
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private:
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std::size_t m_offset;
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std::istream& m_input;
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};
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#endif //LEXER_{{name}}_H
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