private DirectiveTriviaSyntax ParseDefineOrUndefDirective(
SyntaxToken hash,
SyntaxToken keyword,
bool isActive,
bool isFollowingToken
)
{
if (isFollowingToken)
{
keyword = this.AddError(keyword, ErrorCode.ERR_PPDefFollowsToken);
}
var name = this.EatToken(SyntaxKind.IdentifierToken, ErrorCode.ERR_IdentifierExpected);
name = TruncateIdentifier(name);
var end = this.ParseEndOfDirective(ignoreErrors: name.IsMissing);
if (keyword.Kind == SyntaxKind.DefineKeyword)
{
return(SyntaxFactory.DefineDirectiveTrivia(hash, keyword, name, end, isActive));
}
else
{
return(SyntaxFactory.UndefDirectiveTrivia(hash, keyword, name, end, isActive));
}
}