public DelegateCodeGen(CodeGenerator cg, DelegateBindingInfo delegateBindingInfo, int index)
{
this.cg = cg;
var nargs = delegateBindingInfo.parameters.Length;
var retName = this.cg.bindingManager.GetUniqueName(delegateBindingInfo.parameters, "ret");
var firstArgument = typeof(ScriptDelegate) + " fn";
var returnTypeName = this.cg.bindingManager.GetCSTypeFullName(delegateBindingInfo.returnType);
var delegateName = CodeGenerator.NameOfDelegates + index;
var arglist = this.cg.bindingManager.GetCSArglistDecl(delegateBindingInfo.parameters);
foreach (var target in delegateBindingInfo.types)
{
this.cg.cs.AppendLine("[{0}(typeof({1}))]",
this.cg.bindingManager.GetCSTypeFullName(typeof(JSDelegateAttribute)),
this.cg.bindingManager.GetCSTypeFullName(target));
this.cg.bindingManager.log.AppendLine("emitting delegate decl: {0}", target);
}
if (!string.IsNullOrEmpty(arglist))
{
arglist = ", " + arglist;
}
this.cg.cs.AppendLine($"public static unsafe {returnTypeName} {delegateName}({firstArgument}{arglist}) {{");
this.cg.cs.AddTabLevel();
this.cg.cs.AppendLine("var ctx = fn.ctx;");
if (nargs > 0)
{
this.cg.cs.AppendLine("var argv = stackalloc JSValue[{0}];", nargs);
for (var i = 0; i < nargs; i++)
{
var parameter = delegateBindingInfo.parameters[i];
var pusher = this.cg.AppendValuePusher(parameter.ParameterType, parameter.Name);
this.cg.cs.AppendLine("argv[{0}] = {1};", i, pusher);
this.cg.cs.AppendLine("if (argv[{0}].IsException())", i);
this.cg.cs.AppendLine("{");
this.cg.cs.AddTabLevel();
for (var j = 0; j < i; j++)
{
this.cg.cs.AppendLine("JSApi.JS_FreeValue(ctx, argv[{0}]);", j);
}
this.cg.cs.AppendLine("throw new Exception(ctx.GetExceptionString());");
this.cg.cs.DecTabLevel();
this.cg.cs.AppendLine("}");
}
this.cg.cs.AppendLine("var rval = fn.Invoke(ctx, {0}, argv);", nargs);
}
else
{
this.cg.cs.AppendLine("var rval = fn.Invoke(ctx);");
}
if (delegateBindingInfo.returnType != typeof(void))
{
this.cg.cs.AppendLine($"{this.cg.bindingManager.GetCSTypeFullName(delegateBindingInfo.returnType)} {retName};");
var getter = this.cg.bindingManager.GetScriptObjectGetter(delegateBindingInfo.returnType, "ctx", "rval", retName);
this.cg.cs.AppendLine("var succ = {0};", getter);
FreeArgs(nargs);
CheckReturnValue();
this.cg.cs.AppendLine("if (succ)");
this.cg.cs.AppendLine("{");
this.cg.cs.AddTabLevel();
this.cg.cs.AppendLine($"return {retName};");
this.cg.cs.DecTabLevel();
this.cg.cs.AppendLine("}");
this.cg.cs.AppendLine("else");
this.cg.cs.AppendLine("{");
this.cg.cs.AddTabLevel();
this.cg.cs.AppendLine($"throw new Exception(\"js exception caught\");");
this.cg.cs.DecTabLevel();
this.cg.cs.AppendLine("}");
}
else
{
FreeArgs(nargs);
CheckReturnValue();
}
}
public virtual void OnPostGenerateDelegate(BindingManager bindingManager, DelegateBindingInfo bindingInfo)
{
}