// return true if an argument exists as a param or variable
internal Nullable <bool> ParamOrVariableExists(string paramOrVariable)
{
// do not check the snippet
if (CompilableType.IsViewOrSnippet())
{
return(null);
}
// check params
bool exists = ParamExists(paramOrVariable);
if (exists)
{
return(true);
}
// check variables
exists = VariableExists(paramOrVariable) == true;
if (exists)
{
return(true);
}
// neither param nor variable
return(false);
}
// general lookup method for checking the variable existence
// returns:
// true : it exists
// false: not exists
// null : check not needed (it is a snippet)
internal Nullable <bool> VariableExists(string variable)
{
// do not check the snippet neither the view
if (CompilableType.IsViewOrSnippet())
{
return(null);
}
return(_variables.Where(v => v.Name.EqualsCS(variable)).Any());
}