private PPNode ParsePreprocessorDirective()
{
PPNode result = null;
int startLine = lineCount;
inPPDirective = true;
Advance(); // over hash
IdentifierExpression ie = (IdentifierExpression)ParseIdentifierOrKeyword(false, false, false, false);
string ppKind = ie.Identifier;
PreprocessorID id = PreprocessorID.Empty;
if (preprocessor.ContainsKey(ppKind))
{
id = preprocessor[ppKind];
}
else
{
ReportError("Preprocessor directive must be valid identifier, rather than \"" + ppKind + "\".");
}
switch (id)
{
case PreprocessorID.Define:
// conditional-symbol pp-newline
IdentifierExpression def = (IdentifierExpression)ParseIdentifierOrKeyword(false, false, false, false);
if (!ppDefs.ContainsKey(def.Identifier))
{
ppDefs.Add(def.Identifier, PreprocessorID.Empty);
}
result = new PPDefineNode(def );
break;
case PreprocessorID.Undef:
// conditional-symbol pp-newline
IdentifierExpression undef = (IdentifierExpression)ParseIdentifierOrKeyword(false, false, false, false);
if(ppDefs.ContainsKey(undef.Identifier))
{
ppDefs.Remove(undef.Identifier);
}
result = new PPDefineNode(undef );
break;
case PreprocessorID.If:
// pp-expression pp-newline conditional-section(opt)
if (curtok.ID == TokenID.LParen)
{
Advance();
}
//int startCount = lineCount;
ppCondition = false;
// todo: account for true, false, ||, &&, ==, !=, !
//IdentifierExpression ifexpr = (IdentifierExpression)ParseIdentifierOrKeyword(false, false, false, false);
ExpressionNode ifexpr = ParseExpression(true);
// TODO : Parse and interpret identifier : mono file test-345.cs -> #if (!TEST && !DUNNO && !DUNNO)
if ( (ifexpr is IdentifierExpression)
&& ppDefs.ContainsKey(((IdentifierExpression)ifexpr).Identifier))
{
ppCondition = true;
}
//result = new PPIfNode(ParseExpressionToNewline());
if (curtok.ID == TokenID.RParen)
{
Advance();
}
if (ppCondition == false)
{
// skip this block
SkipToElseOrEndIf();
}
break;
case PreprocessorID.Elif:
// pp-expression pp-newline conditional-section(opt)
SkipToEOL(startLine);
break;
case PreprocessorID.Else:
// pp-newline conditional-section(opt)
if (ppCondition)
{
// skip this block
SkipToElseOrEndIf();
}
break;
case PreprocessorID.Endif:
// pp-newline
result = new PPEndIfNode(curtok);
ppCondition = false;
break;
case PreprocessorID.Line:
// line-indicator pp-newline
SkipToEOL(startLine);
break;
case PreprocessorID.Error:
// pp-message
SkipToEOL(startLine);
break;
case PreprocessorID.Warning:
// pp-message
SkipToEOL(startLine);
break;
case PreprocessorID.Region:
// pp-message
SkipToEOL(startLine);
break;
case PreprocessorID.Endregion:
// pp-message
SkipToEOL(startLine);
break;
case PreprocessorID.Pragma:
// pp-message
//pragma-warning-body:
// warning whitespace warning-action
// warning whitespace warning-action whitespace warning-list
int start_line = curtok.Line;
result = new PPPragmaNode(curtok);
if (curtok.Line == start_line)
{
((PPPragmaNode)result).Identifier = (IdentifierExpression)ParseIdentifierOrKeyword(false, false, false, false);
}
if (curtok.Line == start_line)
{
string paction = ((IdentifierExpression)ParseIdentifierOrKeyword(false, false, false, false)).Identifier;
((PPPragmaNode)result).Action = (PragmaAction)Enum.Parse(typeof(PragmaAction), paction);
}
while (curtok.Line == start_line)
{
if (curtok.ID != TokenID.Comma)
{
if (curtok.ID == TokenID.IntLiteral)
{
((PPPragmaNode)result).Value.Add(new ConstantExpression(new IntegralPrimitive(strings[curtok.Data], IntegralType.Int, curtok) ));
}
else
{
if (curtok.ID == TokenID.UIntLiteral)
{
((PPPragmaNode)result).Value.Add(new ConstantExpression(new IntegralPrimitive(strings[curtok.Data], IntegralType.UInt,curtok) ));
}
else
{
if (curtok.ID == TokenID.LongLiteral)
{
((PPPragmaNode)result).Value.Add(new ConstantExpression(new IntegralPrimitive(strings[curtok.Data], IntegralType.Long, curtok) ));
}
else
{
if (curtok.ID == TokenID.ULongLiteral)
{
((PPPragmaNode)result).Value.Add(new ConstantExpression(new IntegralPrimitive(strings[curtok.Data], IntegralType.ULong, curtok) ));
}
else
{
RecoverFromError(TokenID.IntLiteral);
}
}
}
}
}
Advance();
}
ppCondition = true;
break;
default:
break;
}
inPPDirective = false;
return result;
}
private PPNode ParsePreprocessorDirective()
{
PPNode result = null;
int startLine = lineCount;
inPPDirective = true;
Advance(); // over hash
IdentifierExpression ie = (IdentifierExpression)ParseIdentifierOrKeyword(false, false, false, false, false);
string ppKind = ie.Identifier;
PreprocessorID id = PreprocessorID.Empty;
if (preprocessor.ContainsKey(ppKind))
{
id = preprocessor[ppKind];
}
else
{
ReportError("Preprocessor directive must be valid identifier, rather than \"" + ppKind + "\".");
}
switch (id)
{
case PreprocessorID.Define:
// conditional-symbol pp-newline
if (curtok.ID == TokenID.True || curtok.ID == TokenID.False)
{
ReportError("Conditional symbol may neither be true nor false");
Advance();
break;
}
IdentifierExpression def = (IdentifierExpression)ParseIdentifierOrKeyword(false, false, false, false, false);
if (!cu.PPDefs.ContainsKey(def.Identifier))
{
cu.PPDefs.Add(def.Identifier, PreprocessorID.Empty);
}
result = new PPDefineNode(def);
break;
case PreprocessorID.Undef:
// conditional-symbol pp-newline
IdentifierExpression undef = (IdentifierExpression)ParseIdentifierOrKeyword(false, false, false, false, false);
if (cu.PPDefs.ContainsKey(undef.Identifier))
{
cu.PPDefs.Remove(undef.Identifier);
}
// result = new PPDefineNode(undef );
break;
case PreprocessorID.If:
// pp-expression pp-newline conditional-section(opt)
ppCondition = EvalPPExpression(ParsePreprocessorExpression());
//result = new PPIfNode(ParseExpressionToNewline());
if (!ppCondition)
{
// skip this block
SkipToElseOrEndIf();
}
break;
case PreprocessorID.Elif:
// pp-expression pp-newline conditional-section(opt)
if (ppCondition) // a previous part was already true?
{
SkipToElseOrEndIf();
break;
}
ppCondition = EvalPPExpression(ParsePreprocessorExpression());
if (!ppCondition)
{
// skip this block
SkipToElseOrEndIf();
}
break;
case PreprocessorID.Else:
// pp-newline conditional-section(opt)
if (ppCondition)
{
// skip this block
SkipToElseOrEndIf();
}
break;
case PreprocessorID.Endif:
// pp-newline
result = new PPEndIfNode(curtok);
ppCondition = false;
break;
case PreprocessorID.Line:
// line-indicator pp-newline
SkipToEOL(startLine);
break;
case PreprocessorID.Error:
// pp-message
SkipToEOL(startLine);
break;
case PreprocessorID.Warning:
// pp-message
SkipToEOL(startLine);
break;
case PreprocessorID.Region:
// pp-message
SkipToEOL(startLine);
break;
case PreprocessorID.Endregion:
// pp-message
SkipToEOL(startLine);
break;
case PreprocessorID.Pragma:
{
// pp-message
//pragma-warning-body:
// warning whitespace warning-action
// warning whitespace warning-action whitespace warning-list
int start_line = curtok.Line;
PPPragmaNode pppnode = new PPPragmaNode(curtok);
result = pppnode;
if (curtok.Line == start_line)
{
pppnode.Identifier = (IdentifierExpression)ParseIdentifierOrKeyword(false, false, false, false, false);
}
if (curtok.Line == start_line)
{
string paction = ((IdentifierExpression)ParseIdentifierOrKeyword(false, false, false, false, false)).Identifier;
pppnode.Action = (PragmaAction)Enum.Parse(typeof(PragmaAction), paction);
}
while (curtok.Line == start_line)
{
if (curtok.ID != TokenID.Comma)
{
if (curtok.ID == TokenID.IntLiteral)
{
pppnode.Value.Add(new ConstantExpression(new IntegralPrimitive(strings[curtok.Data], IntegralType.Int, curtok)));
}
else
{
if (curtok.ID == TokenID.UIntLiteral)
{
pppnode.Value.Add(new ConstantExpression(new IntegralPrimitive(strings[curtok.Data], IntegralType.UInt, curtok)));
}
else
{
if (curtok.ID == TokenID.LongLiteral)
{
pppnode.Value.Add(new ConstantExpression(new IntegralPrimitive(strings[curtok.Data], IntegralType.Long, curtok)));
}
else
{
if (curtok.ID == TokenID.ULongLiteral)
{
pppnode.Value.Add(new ConstantExpression(new IntegralPrimitive(strings[curtok.Data], IntegralType.ULong, curtok)));
}
else
{
RecoverFromError(TokenID.IntLiteral);
}
}
}
}
}
Advance();
}
break;
}
default:
break;
}
inPPDirective = false;
return result;
}