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#include "parser.hpp"
#include "errorhandler.hpp"
#include "exception.hpp"
#include "scanner.hpp"
#include <components/misc/strings/lower.hpp>
namespace Compiler
{
// Report the error and throw an exception.
[[noreturn]] void Parser::reportSeriousError(const std::string& message, const TokenLoc& loc)
{
mErrorHandler.error(message, loc);
throw SourceException();
}
// Report the warning without throwing an exception.
void Parser::reportWarning(const std::string& message, const TokenLoc& loc)
{
mErrorHandler.warning(message, loc);
}
// Report an unexpected EOF condition.
[[noreturn]] void Parser::reportEOF()
{
mErrorHandler.endOfFile();
throw EOFException();
}
// Return error handler
ErrorHandler& Parser::getErrorHandler()
{
return mErrorHandler;
}
// Return context
const Context& Parser::getContext() const
{
return mContext;
}
std::string Parser::toLower(const std::string& name)
{
std::string lowerCase = Misc::StringUtils::lowerCase(name);
return lowerCase;
}
Parser::Parser(ErrorHandler& errorHandler, const Context& context)
: mErrorHandler(errorHandler)
, mContext(context)
, mOptional(false)
, mEmpty(true)
{
}
// destructor
Parser::~Parser() = default;
// Handle an int token.
// \return fetch another token?
//
// - Default-implementation: Report an error.
bool Parser::parseInt(int value, const TokenLoc& loc, Scanner& scanner)
{
if (!(mOptional && mEmpty))
reportSeriousError("Unexpected numeric value", loc);
else
scanner.putbackInt(value, loc);
return false;
}
// Handle a float token.
// \return fetch another token?
//
// - Default-implementation: Report an error.
bool Parser::parseFloat(float value, const TokenLoc& loc, Scanner& scanner)
{
if (!(mOptional && mEmpty))
reportSeriousError("Unexpected floating point value", loc);
else
scanner.putbackFloat(value, loc);
return false;
}
// Handle a name token.
// \return fetch another token?
//
// - Default-implementation: Report an error.
bool Parser::parseName(const std::string& name, const TokenLoc& loc, Scanner& scanner)
{
if (!(mOptional && mEmpty))
reportSeriousError("Unexpected name", loc);
else
scanner.putbackName(name, loc);
return false;
}
// Handle a keyword token.
// \return fetch another token?
//
// - Default-implementation: Report an error.
bool Parser::parseKeyword(int keyword, const TokenLoc& loc, Scanner& scanner)
{
if (!(mOptional && mEmpty))
reportSeriousError("Unexpected keyword", loc);
else
scanner.putbackKeyword(keyword, loc);
return false;
}
// Handle a special character token.
// \return fetch another token?
//
// - Default-implementation: Report an error.
bool Parser::parseSpecial(int code, const TokenLoc& loc, Scanner& scanner)
{
if (!(mOptional && mEmpty))
reportSeriousError("Unexpected special token", loc);
else
scanner.putbackSpecial(code, loc);
return false;
}
bool Parser::parseComment(const std::string& comment, const TokenLoc& loc, Scanner& scanner)
{
return true;
}
// Handle an EOF token.
//
// - Default-implementation: Report an error.
void Parser::parseEOF(Scanner& scanner)
{
reportEOF();
}
void Parser::reset()
{
mOptional = false;
mEmpty = true;
}
void Parser::setOptional(bool optional)
{
mOptional = optional;
}
void Parser::start()
{
mEmpty = false;
}
bool Parser::isEmpty() const
{
return mEmpty;
}
}
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