public void SetDynamic( string identifier, Dynamic dynamic )
{
if ( !TrySetDynamic ( identifier, dynamic ) )
{
AddDynamic(identifier, dynamic);
}
}
/// <summary>
/// Adds the varible at this level of scope
/// </summary>
public void AddDynamic( string identifier, Dynamic dynamic )
{
if (dynamic == null)
_lookup.Remove ( identifier );
else
_lookup[identifier] = dynamic;
}
/// <summary>
/// Evaluate a block sticks it in a dynamic and returns it
/// for later execution.
/// </summary>
/// <param name="heap"></param>
/// <returns></returns>
public override Dynamic Evaluate()
{
var result = new Dynamic
{
Scope = Scope,
BlockValue = this
};
return result;
}
/// <summary>
/// Setting a variable with an indexer - the original variable must have already been set
/// </summary>
public void SetDynamic( string identifier, Dynamic indexer, Dynamic dynamic )
{
Dynamic variable = TryGetDynamic ( identifier );
if (variable == null) // TODO Better error
throw new Exception ("Indexing into non-existant array");
if (variable.Type != DynamicType.arrayType) // TODO Better error
throw new Exception ("Indexing into non-array");
variable.ArrayValue[(Int32)Math.Truncate(indexer.NumberValue)] = dynamic;
}
public Dynamic GetDynamic( string identifier )
{
Dynamic result = TryGetDynamic ( identifier );
if ( result != null )
return result;
Dynamic newDynamic = new Dynamic ()
{
Scope = this
};
_lookup.Add ( identifier, newDynamic );
return newDynamic;
}
private Dynamic EvaluateSub( Dynamic left, Dynamic right )
{
return new Dynamic ( )
{
NumberValue = left.NumberValue - right.NumberValue,
Scope = this.Scope
};
}
/// <summary>
/// Calls a block that this variable is assigned to.
/// Returns a Variable which holds a block if that was the
/// tail call of this block.
/// </summary>
public ITailCallExecution Execute( Variable variable, Dynamic parameters )
{
Dynamic dynamic = Scope.GetDynamic ( variable.Ident );
if (dynamic.Type == DynamicType.arrayType)
{
Dynamic index = variable.Indexer.Evaluate();
dynamic = dynamic.ArrayValue[(Int32)Math.Truncate (index.NumberValue)];
}
if ( dynamic.BlockValue != null )
{
_debug.PrintDebugInfo ( "Executing block : " + variable.Ident );
dynamic.BlockValue.Scope.AddDynamic ( "$", parameters );
ITailCallExecution tailCall = dynamic.BlockValue.ExecuteBlockWithTailCallElimination ();
if (tailCall != null)
_debug.PrintDebugInfo ( "Tail call returned : " + tailCall.ToString() );
return tailCall;
}
return null;
}
/// <summary>
/// Try to set the variable at a scope level that has this defined.
/// </summary>
/// <returns>
/// True if variable has been set.
/// False if variable has not been set <see cref="System.Boolean"/>
/// </returns>
public bool TrySetDynamic( string identifier, Dynamic dynamic )
{
if (_lookup.ContainsKey ( identifier ) )
{
_lookup[identifier] = dynamic;
return true;
}
else if ( _inheritedScope != null )
return _inheritedScope.TrySetDynamic( identifier, dynamic );
return false;
}