override public void Visit(AST_expression_operand expression_operand)
{
base.Visit(expression_operand);
if (expression_operand.Expression != null)
{
expression_operand.DataType = expression_operand.Expression.DataType;
}
}
private AST_operand Parse_operand(TokenKind followSet)
{
IncrementDepth();
DebugPrint("opnd");
Token t = LookAheadToken();
AST_operand operand;
switch (t.Kind)
{
case int_Literal:
operand = Parse_integer_literal();
break;
case string_Literal:
operand = Parse_string_literal();
break;
case bool_Literal:
operand = Parse_bool_literal(followSet);
break;
case Identifier:
operand = Parse_identifier(followSet);
break;
case OpenParenthesis:
Match(OpenParenthesis);
operand = new AST_expression_operand(Parse_expression(followSet | CloseParenthesis));
if (LookAheadToken().Kind == CloseParenthesis)
{
Match(CloseParenthesis);
}
else
{
Error("')' expected, '" + LookAheadToken().ToString() + "' found.", LookAheadToken());
SkipUntilFollow(followSet | CloseParenthesis);
if (LookAheadToken().Kind == CloseParenthesis)
{
Match(CloseParenthesis);
}
}
break;
default:
Error("Operand expected. '" + t.ToString() + "' does not start an operand.", t);
SkipUntilFollow(followSet);
operand = new ASTDummy_operand();
break;
}
operand.Row = t.Row;
operand.Column = t.Column;
DecrementDepth();
return(operand);
}
public virtual void Visit(AST_expression_operand expression_operand)
{
if (expression_operand.Expression != null)
{
IncrementDepth();
expression_operand.Expression.Accept(this);
DecrementDepth();
}
}
override public void Visit(AST_expression_operand expression_operand)
{
expression_operand.Expression.Accept(this);
}
