A function declaration.
Because some functions have type parameters, getting a model requires applying type arguments to the function declaration with apply in order to be able to invoke that function. For example, here is how you would obtain a function model that you can invoke from a toplevel function declaration:
String foo<T>(){ return "Hello, our T is: ``typeLiteral<T>()``"; } void test(){ // We need to apply the Integer closed type to the foo declaration in order to get the foo<Integer> function model Function<String,[]> functionModel = `function foo`.apply<String,[]>(`Integer`); // This will print: Hello, our T is: ceylon.language::Integer print(functionModel()); }
For methods it is a bit longer, because methods need to be applied not only their type arguments but also the containing type, so you should use memberApply and start by giving the containing closed type:
class Outer(){ shared String hello() => "Hello"; } void test(){ // apply the containing closed type `Outer` to the method declaration `Outer.hello` Method<Outer,String,[]> methodModel = `function Outer.hello`.memberApply<Outer,String,[]>(`Outer`); // We now have a Method, which needs to be applied to a containing instance in order to become an // invokable function: Function<String,[]> boundMethodModel = methodModel(Outer()); // This will print: Hello print(boundMethodModel()); }
Inherited Attributes |
Attributes inherited from: Object |
Attributes inherited from: Declaration |
Attributes inherited from: FunctionOrValueDeclaration |
Attributes inherited from: FunctionalDeclaration |
Attributes inherited from: GenericDeclaration |
Attributes inherited from: NestableDeclaration |
Attributes inherited from: TypedDeclaration |
Methods | |
apply | Source Code shared formal Function<Return,Arguments> apply<Return = Anything, Arguments = Nothing>(Type<Anything>[] typeArguments) Applies the given closed type arguments to this function declaration in order to obtain a function model. See this code sample for an example on how to use this. Throws:
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invoke | Source Code Invokes the underlying toplevel function, by applying the specified type arguments and value arguments. Parameters:
Throws:
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memberApply | Source Code shared formal Method<Container,Return,Arguments> memberApply<Container = Nothing, Return = Anything, Arguments = Nothing>(Type<Container> containerType, Type<Anything>[] typeArguments) Applies the given closed container type and type arguments to this method declaration in order to obtain a method model. See this code sample for an example on how to use this. Throws:
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memberInvoke | Source Code shared default Anything memberInvoke(Object container, Type<Anything>[] typeArguments = [], Anything[] arguments) Invokes the underlying method, by applying the specified type arguments and value arguments. Parameters:
Throws:
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Inherited Methods |
Methods inherited from: Object |
Methods inherited from: AnnotatedDeclaration |
Methods inherited from: FunctionalDeclaration |
Methods inherited from: GenericDeclaration |