protected override Expression RewriteSet(AssignmentExtensionExpression node)
{
GlobalVariableExpression lvalue = (GlobalVariableExpression)node.Expression;
return(AstUtils.Convert(
Expression.Assign(
MapToExpression(lvalue),
AstUtils.Convert(Visit(node.Value), typeof(object))
),
node.Type
));
}
private Expression Rewrite(AssignmentExtensionExpression node)
{
Expression lvalue = node.Expression;
GlobalVariableExpression global = lvalue as GlobalVariableExpression;
if (global != null)
{
return(RewriteSet(node));
}
return(node);
}
protected override Expression RewriteSet(AssignmentExtensionExpression node)
{
GlobalVariableExpression lvalue = (GlobalVariableExpression)node.Expression;
EnsureUniqueName(lvalue);
return(AstUtils.Convert(
Expression.Call(
typeof(ScriptingRuntimeHelpers).GetMethod(lvalue.IsLocal ? "SetName" : "SetGlobalName"),
new Expression[] {
Context,
AstUtils.Constant(SymbolTable.StringToId(lvalue.Name)),
Visit(node.Value)
}
),
node.Type
));
}
protected override Expression VisitExtension(Expression node)
{
if (node is YieldExpression ||
node is GeneratorExpression ||
node is FinallyFlowControlExpression)
{
// These should be rewritten last, when doing finaly compilation
// for now, just walk them so we can find other nodes
return(base.VisitExtension(node));
}
GlobalVariableExpression global = node as GlobalVariableExpression;
if (global != null)
{
return(RewriteGet(global));
}
CodeContextExpression cc = node as CodeContextExpression;
if (cc != null)
{
return(_context);
}
CodeContextScopeExpression ccs = node as CodeContextScopeExpression;
if (ccs != null)
{
return(Rewrite(ccs));
}
AssignmentExtensionExpression aee = node as AssignmentExtensionExpression;
if (aee != null)
{
return(Rewrite(aee));
}
// Must remove extension nodes because they could contain
// one of the above node types. See, e.g. DeleteUnboundExpression
return(Visit(node.ReduceExtensions()));
}
protected abstract Expression RewriteSet(AssignmentExtensionExpression node);
