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#include "lexer.h"
#include <iostream>
namespace jinja2
{
bool Lexer::Preprocess()
{
bool result = true;
while (1)
{
lexertk::token token = m_tokenizer();
if (token.is_error())
{
result = false;
break;
}
Token newToken;
newToken.range.startOffset = token.position;
newToken.range.endOffset = newToken.range.startOffset + token.length;
if (token.type == lexertk::token::e_eof)
{
newToken.type = Token::Eof;
m_tokens.push_back(std::move(newToken));
break;
}
switch (token.type)
{
case lexertk::token::e_number:
result = ProcessNumber(token, newToken);
break;
case lexertk::token::e_symbol:
result = ProcessSymbolOrKeyword(token, newToken);
break;
case lexertk::token::e_string:
result = ProcessString(token, newToken);
break;
case lexertk::token::e_lte:
newToken.type = Token::LessEqual;
break;
case lexertk::token::e_ne:
newToken.type = Token::NotEqual;
break;
case lexertk::token::e_gte:
newToken.type = Token::GreaterEqual;
break;
case lexertk::token::e_eq:
newToken.type = Token::Equal;
break;
case lexertk::token::e_mulmul:
newToken.type = Token::MulMul;
break;
case lexertk::token::e_divdiv:
newToken.type = Token::DivDiv;
break;
default:
newToken.type = static_cast<Token::Type>(token.type);
break;
}
if (result)
m_tokens.push_back(std::move(newToken));
else
break;
}
return result;
}
bool Lexer::ProcessNumber(const lexertk::token&, Token& newToken)
{
newToken.type = Token::FloatNum;
newToken.value = m_helper->GetAsValue(newToken.range, newToken.type);
return true;
}
bool Lexer::ProcessSymbolOrKeyword(const lexertk::token&, Token& newToken)
{
Keyword kwType = m_helper->GetKeyword(newToken.range);
Token::Type tokType = Token::Unknown;
switch (kwType)
{
case Keyword::None:
tokType = Token::None;
break;
case Keyword::True:
tokType = Token::True;
break;
case Keyword::False:
tokType = Token::False;
break;
default:
tokType = Token::Unknown;
break;
}
if (tokType == Token::Unknown)
{
newToken.type = Token::Identifier;
auto id = m_helper->GetAsString(newToken.range);
newToken.value = InternalValue(id);
}
else
{
newToken.type = tokType;
}
return true;
}
bool Lexer::ProcessString(const lexertk::token&, Token& newToken)
{
newToken.type = Token::String;
newToken.value = m_helper->GetAsValue(newToken.range, newToken.type);
return true;
}
} // namespace jinja2
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