private DirectiveTriviaSyntax ParseLineDirective(
SyntaxToken hash,
SyntaxToken id,
bool isActive
)
{
SyntaxToken line;
SyntaxToken file = null;
bool sawLineButNotFile = false;
switch (this.CurrentToken.Kind)
{
case SyntaxKind.DefaultKeyword:
case SyntaxKind.HiddenKeyword:
line = this.EatToken();
break;
default:
line = this.EatToken(
SyntaxKind.NumericLiteralToken,
ErrorCode.ERR_InvalidLineNumber,
reportError: isActive
);
sawLineButNotFile = true; //assume this is the case until we (potentially) see the file name below
if (isActive && !line.IsMissing && line.Kind == SyntaxKind.NumericLiteralToken)
{
if ((int)line.Value < 1)
{
line = this.AddError(line, ErrorCode.ERR_InvalidLineNumber);
}
else if ((int)line.Value > 0xfeefed)
{
line = this.AddError(line, ErrorCode.WRN_TooManyLinesForDebugger);
}
}
if (
this.CurrentToken.Kind == SyntaxKind.StringLiteralToken &&
(
line.IsMissing ||
line.GetTrailingTriviaWidth() > 0 ||
this.CurrentToken.GetLeadingTriviaWidth() > 0
)
) //require separation between line number and file name
{
file = this.EatToken();
sawLineButNotFile = false;
}
break;
}
var end = this.ParseEndOfDirective(
ignoreErrors: line.IsMissing || !isActive,
afterLineNumber: sawLineButNotFile
);
return(SyntaxFactory.LineDirectiveTrivia(hash, id, line, file, end, isActive));
}