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implemented optional arguments

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This commit is contained in:
Marc Zinnschlag 2010-08-22 12:47:56 +02:00
parent 17135a6403
commit f4e79a48f0
7 changed files with 344 additions and 239 deletions
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48
components/compiler/parser.cpp
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@ -57,15 +57,15 @@ namespace Compiler
std::string Parser::toLower (const std::string& name)
{
std::string lowerCase;
std::transform (name.begin(), name.end(), std::back_inserter (lowerCase),
(int(*)(int)) std::tolower);
return lowerCase;
}
Parser::Parser (ErrorHandler& errorHandler, Context& context)
: mErrorHandler (errorHandler), mContext (context)
: mErrorHandler (errorHandler), mContext (context), mOptional (false), mEmpty (true)
{}
// destructor
@ -79,7 +79,9 @@ namespace Compiler
bool Parser::parseInt (int value, const TokenLoc& loc, Scanner& scanner)
{
reportSeriousError ("Unexpected numeric value", loc);
if (!(mOptional && mEmpty))
reportSeriousError ("Unexpected numeric value", loc);
return false;
}
@ -90,7 +92,9 @@ namespace Compiler
bool Parser::parseFloat (float value, const TokenLoc& loc, Scanner& scanner)
{
reportSeriousError ("Unexpected floating point value", loc);
if (!(mOptional && mEmpty))
reportSeriousError ("Unexpected floating point value", loc);
return false;
}
@ -102,7 +106,9 @@ namespace Compiler
bool Parser::parseName (const std::string& name, const TokenLoc& loc,
Scanner& scanner)
{
reportSeriousError ("Unexpected name", loc);
if (!(mOptional && mEmpty))
reportSeriousError ("Unexpected name", loc);
return false;
}
@ -113,7 +119,9 @@ namespace Compiler
bool Parser::parseKeyword (int keyword, const TokenLoc& loc, Scanner& scanner)
{
reportSeriousError ("Unexpected keyword", loc);
if (!(mOptional && mEmpty))
reportSeriousError ("Unexpected keyword", loc);
return false;
}
@ -124,7 +132,9 @@ namespace Compiler
bool Parser::parseSpecial (int code, const TokenLoc& loc, Scanner& scanner)
{
reportSeriousError ("Unexpected special token", loc);
if (!(mOptional && mEmpty))
reportSeriousError ("Unexpected special token", loc);
return false;
}
@ -136,5 +146,25 @@ namespace Compiler
{
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;
}
}