StringFromStringLexer.cpp

#include "StringFromStringLexer.h"

namespace string {

StringFromStringLexer::StringFromStringLexer(std::stringstream& in) : m_In(in) {
	m_Current.type = TokenType::ERROR;
	m_Current.value = "";
}

StringFromStringLexer& StringFromStringLexer::next() {
	char character;
	m_Current.value = "";

L0:
	character = m_In.get();
	if(m_In.eof()) {
		m_Current.type = TokenType::TEOF;
		return *this;
	} else if(character == ' ' || character == '\n' || character == '\t') {
		goto L0;
	} else if(character == '<') {
		m_Current.type = TokenType::LESS;
		m_Current.value += character;
		return *this;
	} else if(character == '>') {
		m_Current.type = TokenType::GREATER;
		m_Current.value += character;
		return *this;
	} else if(character == '"') {
		m_Current.type = TokenType::QUOTE;
		m_Current.value += character;
		return *this;
	} else {
		m_In.unget();
		m_Current.type = TokenType::ERROR;
		return *this;
	}
}

StringFromStringLexer::Token StringFromStringLexer::token() {
	return m_Current;
}

} /* namespace string */