/// <summary>
/// Creates a new declarative scope for use inside a function body.
/// </summary>
/// <param name="parentScope"> A reference to the parent scope. Can not be <c>null</c>. </param>
/// <param name="functionName"> The name of the function. Can be empty for an anonymous function. </param>
/// <param name="argumentNames"> The names of each of the function arguments. </param>
/// <returns> A new DeclarativeScope instance. </returns>
internal static DeclarativeScope CreateFunctionScope(Scope parentScope, string functionName, List <ArgVariable> args)
{
if (functionName == null)
{
throw new ArgumentNullException("functionName");
}
if (args == null)
{
throw new ArgumentNullException("args");
}
DeclarativeScope result = new DeclarativeScope(parentScope, 0);
if (string.IsNullOrEmpty(functionName) == false)
{
result.AddVariable(functionName);
}
// At this point, the 'this' keyword is already in args.
result.AddVariable("arguments");
foreach (ArgVariable arg in args)
{
result.Declare(arg);
arg.Scope = result;
}
return(result);
}
/// <summary>
/// Creates a new declarative scope for use inside a catch statement.
/// </summary>
/// <param name="parentScope"> A reference to the parent scope. Can not be <c>null</c>. </param>
/// <param name="catchVariableName"> The name of the catch variable. </param>
/// <returns> A new DeclarativeScope instance. </returns>
internal static DeclarativeScope CreateCatchScope(Scope parentScope, string catchVariableName)
{
if (parentScope == null)
{
throw new ArgumentNullException("parentScope", "Catch scopes must have a parent scope.");
}
if (catchVariableName == null)
{
throw new ArgumentNullException("catchVariableName");
}
DeclarativeScope result = new DeclarativeScope(parentScope, 0);
result.AddVariable(catchVariableName);
result.CanDeclareVariables = false; // Only the catch variable can be declared in this scope.
return(result);
}
