private PreprocessorLine DoIf(PreprocessorIfLine ifLine)
{
PreprocessorLine line;
if (ifLine.Value)
{
line = LexBlock();
switch (line.Type)
{
case PreprocessorTokenType.Endif:
line = null;
break;
case PreprocessorTokenType.Elif:
line = SkipElifBlock();
break;
case PreprocessorTokenType.Else:
line = SkipElseBlock();
break;
case PreprocessorTokenType.EndOfLine:
ReportError(PreprocessorError.UnexpectedEndOfFile);
break;
case PreprocessorTokenType.EndRegion:
default:
ReportError(PreprocessorError.UnexpectedDirective);
break;
}
}
else
{
line = SkipBlock();
switch (line.Type)
{
case PreprocessorTokenType.Else:
line = DoElse();
break;
case PreprocessorTokenType.Elif:
return(DoIf((PreprocessorIfLine)line));
case PreprocessorTokenType.Endif:
line = null;
break;
case PreprocessorTokenType.EndOfLine:
ReportError(PreprocessorError.UnexpectedEndOfFile);
break;
case PreprocessorTokenType.EndRegion:
default:
ReportError(PreprocessorError.UnexpectedDirective);
break;
}
}
return(line);
}
private PreprocessorLine DoIf(PreprocessorIfLine ifLine) {
PreprocessorLine line;
if (ifLine.Value) {
line = LexBlock();
switch (line.Type) {
case PreprocessorTokenType.Endif:
line = null;
break;
case PreprocessorTokenType.Elif:
line = SkipElifBlock();
break;
case PreprocessorTokenType.Else:
line = SkipElseBlock();
break;
case PreprocessorTokenType.EndOfLine:
ReportError(PreprocessorError.UnexpectedEndOfFile);
break;
case PreprocessorTokenType.EndRegion:
default:
ReportError(PreprocessorError.UnexpectedDirective);
break;
}
}
else {
line = SkipBlock();
switch (line.Type) {
case PreprocessorTokenType.Else:
line = DoElse();
break;
case PreprocessorTokenType.Elif:
return DoIf((PreprocessorIfLine)line);
case PreprocessorTokenType.Endif:
line = null;
break;
case PreprocessorTokenType.EndOfLine:
ReportError(PreprocessorError.UnexpectedEndOfFile);
break;
case PreprocessorTokenType.EndRegion:
default:
ReportError(PreprocessorError.UnexpectedDirective);
break;
}
}
return line;
}