static ConstantValue CreateConstant(AST.GlobalConstUse expr)
{
if (expr.Name == QualifiedName.Null)
{
return(ConstantValue.Null);
}
if (expr.Name == QualifiedName.True)
{
return(ConstantValue.True);
}
if (expr.Name == QualifiedName.False)
{
return(ConstantValue.False);
}
return(null);
}
BoundExpression BindGlobalConstUse(AST.GlobalConstUse expr)
{
// translate built-in constants directly
if (expr.Name == QualifiedName.True)
{
return(new BoundLiteral(true));
}
if (expr.Name == QualifiedName.False)
{
return(new BoundLiteral(false));
}
if (expr.Name == QualifiedName.Null)
{
return(new BoundLiteral(null));
}
// bind constant
return(new BoundGlobalConst(expr.Name.ToString()));
}
virtual public void VisitGlobalConstUse(GlobalConstUse x)
{
VisitConstantUse(x);
}