/// <summary>
/// http://www.ecma-international.org/ecma-262/5.1/#sec-13.2
/// </summary>
/// <param name="functionDeclaration"></param>
/// <returns></returns>
public FunctionInstance CreateFunctionObject(FunctionDeclaration functionDeclaration)
{
var functionObject = new ScriptFunctionInstance(
Engine,
functionDeclaration,
LexicalEnvironment.NewDeclarativeEnvironment(Engine, Engine.ExecutionContext.LexicalEnvironment),
functionDeclaration.Strict
)
{
Extensible = true
};
return(functionObject);
}
public ObjectInstance Construct(JsValue[] arguments)
{
var argCount = arguments.Length;
string p = "";
string body = "";
if (argCount == 1)
{
body = TypeConverter.ToString(arguments[0]);
}
else if (argCount > 1)
{
var firstArg = arguments[0];
p = TypeConverter.ToString(firstArg);
for (var k = 1; k < argCount - 1; k++)
{
var nextArg = arguments[k];
p += "," + TypeConverter.ToString(nextArg);
}
body = TypeConverter.ToString(arguments[argCount - 1]);
}
var parameters = this.ParseArgumentNames(p);
var parser = new JavaScriptParser();
FunctionExpression function;
try
{
var functionExpression = "function(" + p + ") { " + body + "}";
function = parser.ParseFunctionExpression(functionExpression);
}
catch (ParserException)
{
throw new JavaScriptException(Engine.SyntaxError);
}
// todo: check if there is not a way to use the FunctionExpression directly instead of creating a FunctionDeclaration
var functionObject = new ScriptFunctionInstance(
Engine,
new FunctionDeclaration
{
Type = SyntaxNodes.FunctionDeclaration,
Body = new BlockStatement
{
Type = SyntaxNodes.BlockStatement,
Body = new [] { function.Body }
},
Parameters = parameters.Select(x => new Identifier
{
Type = SyntaxNodes.Identifier,
Name = x
}).ToArray(),
FunctionDeclarations = function.FunctionDeclarations,
VariableDeclarations = function.VariableDeclarations
},
LexicalEnvironment.NewDeclarativeEnvironment(Engine, Engine.ExecutionContext.LexicalEnvironment),
function.Strict
)
{
Extensible = true
};
return(functionObject);
}