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made usage of comma as argument separator optional (largely untested, because we don't have anything that takes more than one argument)

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This commit is contained in:
Marc Zinnschlag 2010-07-01 11:07:21 +02:00
parent bf55880ce9
commit 1674d406dc
3 changed files with 116 additions and 20 deletions
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66
components/compiler/exprparser.cpp
View file

@ -197,8 +197,12 @@ namespace Compiler
mTokenLoc = loc;
return true;
}
return Parser::parseInt (value, loc, scanner);
else
{
// no comma was used between arguments
scanner.putbackInt (value, loc);
return false;
}
}
bool ExprParser::parseFloat (float value, const TokenLoc& loc, Scanner& scanner)
@ -211,8 +215,12 @@ namespace Compiler
mTokenLoc = loc;
return true;
}
return Parser::parseFloat (value, loc, scanner);
else
{
// no comma was used between arguments
scanner.putbackFloat (value, loc);
return false;
}
}
bool ExprParser::parseName (const std::string& name, const TokenLoc& loc,
@ -232,6 +240,12 @@ namespace Compiler
return true;
}
}
else
{
// no comma was used between arguments
scanner.putbackName (name, loc);
return false;
}
return Parser::parseName (name, loc, scanner);
}
@ -239,16 +253,25 @@ namespace Compiler
bool ExprParser::parseKeyword (int keyword, const TokenLoc& loc, Scanner& scanner)
{
mFirst = false;
if (keyword==Scanner::K_getsquareroot && mNextOperand)
{
mTokenLoc = loc;
parseArguments ("f", scanner);
Generator::squareRoot (mCode);
mNextOperand = false;
return true;
if (mNextOperand)
{
if (keyword==Scanner::K_getsquareroot)
{
mTokenLoc = loc;
parseArguments ("f", scanner);
Generator::squareRoot (mCode);
mNextOperand = false;
return true;
}
}
else
{
// no comma was used between arguments
scanner.putbackKeyword (keyword, loc);
return false;
}
return Parser::parseKeyword (keyword, loc, scanner);
@ -290,11 +313,20 @@ namespace Compiler
return true;
}
if (code==Scanner::S_open && mNextOperand)
if (code==Scanner::S_open)
{
mOperators.push_back ('(');
mTokenLoc = loc;
return true;
if (mNextOperand)
{
mOperators.push_back ('(');
mTokenLoc = loc;
return true;
}
else
{
// no comma was used between arguments
scanner.putbackKeyword (code, loc);
return false;
}
}
if (code==Scanner::S_close && !mNextOperand)

51
components/compiler/scanner.cpp
View file

@ -46,10 +46,29 @@ namespace Compiler
switch (mPutback)
{
case Putback_Special:
{
mPutback = Putback_None;
return parser.parseSpecial (mPutbackCode, mPutbackLoc, *this);
}
case Putback_Integer:
mPutback = Putback_None;
return parser.parseInt (mPutbackInteger, mPutbackLoc, *this);
case Putback_Float:
mPutback = Putback_None;
return parser.parseFloat (mPutbackFloat, mPutbackLoc, *this);
case Putback_Name:
mPutback = Putback_None;
return parser.parseName (mPutbackName, mPutbackLoc, *this);
case Putback_Keyword:
mPutback = Putback_None;
return parser.parseKeyword (mPutbackCode, mPutbackLoc, *this);
case Putback_None:
@ -441,5 +460,33 @@ namespace Compiler
mPutbackCode = code;
mPutbackLoc = loc;
}
void Scanner::putbackInt (int value, const TokenLoc& loc)
{
mPutback = Putback_Integer;
mPutbackInteger = value;
mPutbackLoc = loc;
}
void Scanner::putbackFloat (float value, const TokenLoc& loc)
{
mPutback = Putback_Float;
mPutbackFloat = value;
mPutbackLoc = loc;
}
void Scanner::putbackName (const std::string& name, const TokenLoc& loc)
{
mPutback = Putback_Name;
mPutbackName = name;
mPutbackLoc = loc;
}
void Scanner::putbackKeyword (int keyword, const TokenLoc& loc)
{
mPutback = Putback_Keyword;
mPutbackCode = keyword;
mPutbackLoc = loc;
}
}

19
components/compiler/scanner.hpp
View file

@ -20,7 +20,8 @@ namespace Compiler
{
enum putback_type
{
Putback_None, Putback_Special,
Putback_None, Putback_Special, Putback_Integer, Putback_Float,
Putback_Name, Putback_Keyword
};
ErrorHandler& mErrorHandler;
@ -29,6 +30,9 @@ namespace Compiler
std::istream& mStream;
putback_type mPutback;
int mPutbackCode;
int mPutbackInteger;
float mPutbackFloat;
std::string mPutbackName;
TokenLoc mPutbackLoc;
public:
@ -90,6 +94,19 @@ namespace Compiler
void putbackSpecial (int code, const TokenLoc& loc);
///< put back a special token
void putbackInt (int value, const TokenLoc& loc);
///< put back an integer token
void putbackFloat (float value, const TokenLoc& loc);
///< put back a float token
void putbackName (const std::string& name, const TokenLoc& loc);
///< put back a name toekn
void putbackKeyword (int keyword, const TokenLoc& loc);
///< put back a keyword token
};
}