// http://www.ecma-international.org/ecma-262/5.1/#sec-10.5
public void DeclarationBindingInstantiation(DeclarationBindingType declarationBindingType, IList<FunctionDeclaration> functionDeclarations, IList<VariableDeclaration> variableDeclarations, FunctionInstance functionInstance, JsValue[] arguments)
{
var env = ExecutionContext.VariableEnvironment.Record;
bool configurableBindings = declarationBindingType == DeclarationBindingType.EvalCode;
var strict = StrictModeScope.IsStrictModeCode;
if (declarationBindingType == DeclarationBindingType.FunctionCode)
{
var argCount = arguments.Length;
var n = 0;
foreach (var argName in functionInstance.FormalParameters)
{
n++;
var v = n > argCount ? Undefined.Instance : arguments[n - 1];
var argAlreadyDeclared = env.HasBinding(argName);
if (!argAlreadyDeclared)
{
env.CreateMutableBinding(argName);
}
env.SetMutableBinding(argName, v, strict);
}
}
foreach (var f in functionDeclarations)
{
var fn = f.Id.Name;
var fo = Function.CreateFunctionObject(f);
var funcAlreadyDeclared = env.HasBinding(fn);
if (!funcAlreadyDeclared)
{
env.CreateMutableBinding(fn, configurableBindings);
}
else
{
if (env == GlobalEnvironment.Record)
{
var go = Global;
var existingProp = go.GetProperty(fn);
if (existingProp.Configurable.Value.AsBoolean())
{
go.DefineOwnProperty(fn,
new PropertyDescriptor(
value: Undefined.Instance,
writable: true,
enumerable: true,
configurable: configurableBindings
), true);
}
else
{
if (existingProp.IsAccessorDescriptor() || (!existingProp.Enumerable.Value.AsBoolean()))
{
throw new JavaScriptException(TypeError);
}
}
}
}
env.SetMutableBinding(fn, fo, strict);
}
var argumentsAlreadyDeclared = env.HasBinding("arguments");
if (declarationBindingType == DeclarationBindingType.FunctionCode && !argumentsAlreadyDeclared)
{
var argsObj = ArgumentsInstance.CreateArgumentsObject(this, functionInstance, functionInstance.FormalParameters, arguments, env, strict);
if (strict)
{
var declEnv = env as DeclarativeEnvironmentRecord;
if (declEnv == null)
{
throw new ArgumentException();
}
declEnv.CreateImmutableBinding("arguments");
declEnv.InitializeImmutableBinding("arguments", argsObj);
}
else
{
env.CreateMutableBinding("arguments");
env.SetMutableBinding("arguments", argsObj, false);
}
}
// process all variable declarations in the current parser scope
foreach (var d in variableDeclarations.SelectMany(x => x.Declarations))
{
var dn = d.Id.Name;
var varAlreadyDeclared = env.HasBinding(dn);
if (!varAlreadyDeclared)
{
env.CreateMutableBinding(dn, configurableBindings);
env.SetMutableBinding(dn, Undefined.Instance, strict);
}
}
}
// http://www.ecma-international.org/ecma-262/5.1/#sec-10.5
public void DeclarationBindingInstantiation(DeclarationBindingType declarationBindingType, IList <FunctionDeclaration> functionDeclarations, IList <VariableDeclaration> variableDeclarations, FunctionInstance functionInstance, JsValue[] arguments)
{
var env = ExecutionContext.VariableEnvironment.Record;
bool configurableBindings = declarationBindingType == DeclarationBindingType.EvalCode;
var strict = StrictModeScope.IsStrictModeCode;
if (declarationBindingType == DeclarationBindingType.FunctionCode)
{
var argCount = arguments.Length;
var n = 0;
for (int i = 0, len = functionInstance.FormalParameters.Length; i < len; i++)
{
var argName = functionInstance.FormalParameters[i];
n++;
var v = n > argCount ? Undefined.Instance : arguments[n - 1];
var argAlreadyDeclared = env.HasBinding(argName);
if (!argAlreadyDeclared)
{
env.CreateMutableBinding(argName);
}
env.SetMutableBinding(argName, v, strict);
}
}
for (int i = 0, len = functionDeclarations.Count; i < len; i++)
{
var f = functionDeclarations[i];
var fn = f.Id.Name;
var fo = Function.CreateFunctionObject(f);
var funcAlreadyDeclared = env.HasBinding(fn);
if (!funcAlreadyDeclared)
{
env.CreateMutableBinding(fn, configurableBindings);
}
else
{
if (env == GlobalEnvironment.Record)
{
var go = Global;
var existingProp = go.GetProperty(fn);
if (existingProp.Configurable.Value)
{
go.DefineOwnProperty(fn,
new PropertyDescriptor(
value: Undefined.Instance,
writable: true,
enumerable: true,
configurable: configurableBindings
), true);
}
else
{
if (existingProp.IsAccessorDescriptor() || (!existingProp.Enumerable.Value))
{
throw new JavaScriptException(TypeError);
}
}
}
}
env.SetMutableBinding(fn, fo, strict);
}
var argumentsAlreadyDeclared = env.HasBinding("arguments");
if (declarationBindingType == DeclarationBindingType.FunctionCode && !argumentsAlreadyDeclared)
{
var argsObj = ArgumentsInstance.CreateArgumentsObject(this, functionInstance, functionInstance.FormalParameters, arguments, env, strict);
if (strict)
{
var declEnv = env as DeclarativeEnvironmentRecord;
if (declEnv == null)
{
throw new ArgumentException();
}
declEnv.CreateImmutableBinding("arguments");
declEnv.InitializeImmutableBinding("arguments", argsObj);
}
else
{
env.CreateMutableBinding("arguments");
env.SetMutableBinding("arguments", argsObj, false);
}
}
// process all variable declarations in the current parser scope
for (int i = 0, ilen = variableDeclarations.Count; i < ilen; i++)
{
var varDeclations = variableDeclarations[i];
for (int j = 0, jlen = varDeclations.Declarations.Count; j < jlen; j++)
{
var d = varDeclations.Declarations[j];
var dn = d.Id.Name;
var varAlreadyDeclared = env.HasBinding(dn);
if (!varAlreadyDeclared)
{
env.CreateMutableBinding(dn, configurableBindings);
env.SetMutableBinding(dn, Undefined.Instance, strict);
}
}
}
}
// http://www.ecma-international.org/ecma-262/5.1/#sec-10.5
internal bool DeclarationBindingInstantiation(
DeclarationBindingType declarationBindingType,
List <FunctionDeclaration> functionDeclarations,
List <VariableDeclaration> variableDeclarations,
FunctionInstance functionInstance,
JsValue[] arguments)
{
var env = ExecutionContext.VariableEnvironment._record;
bool configurableBindings = declarationBindingType == DeclarationBindingType.EvalCode;
var strict = StrictModeScope.IsStrictModeCode;
var der = env as DeclarativeEnvironmentRecord;
bool canReleaseArgumentsInstance = false;
if (declarationBindingType == DeclarationBindingType.FunctionCode)
{
var argsObj = _argumentsInstancePool.Rent(functionInstance, functionInstance._formalParameters, arguments, env, strict);
canReleaseArgumentsInstance = true;
if (!ReferenceEquals(der, null))
{
der.AddFunctionParameters(functionInstance, arguments, argsObj);
}
else
{
// slow path
var parameters = functionInstance._formalParameters;
for (var i = 0; i < parameters.Length; i++)
{
var argName = parameters[i];
var v = i + 1 > arguments.Length ? Undefined.Instance : arguments[i];
var argAlreadyDeclared = env.HasBinding(argName);
if (!argAlreadyDeclared)
{
env.CreateMutableBinding(argName, v);
}
env.SetMutableBinding(argName, v, strict);
}
env.CreateMutableBinding("arguments", argsObj);
}
}
if (functionDeclarations.Count > 0)
{
AddFunctionDeclarations(functionDeclarations, env, configurableBindings, strict);
}
if (variableDeclarations.Count == 0)
{
return(canReleaseArgumentsInstance);
}
// process all variable declarations in the current parser scope
if (!ReferenceEquals(der, null))
{
der.AddVariableDeclarations(variableDeclarations);
}
else
{
// slow path
var variableDeclarationsCount = variableDeclarations.Count;
for (var i = 0; i < variableDeclarationsCount; i++)
{
var variableDeclaration = variableDeclarations[i];
var declarationsCount = variableDeclaration.Declarations.Count;
for (var j = 0; j < declarationsCount; j++)
{
var d = variableDeclaration.Declarations[j];
var dn = ((Identifier)d.Id).Name;
var varAlreadyDeclared = env.HasBinding(dn);
if (!varAlreadyDeclared)
{
env.CreateMutableBinding(dn, Undefined.Instance);
}
}
}
}
return(canReleaseArgumentsInstance);
}