diff --git a/doc/classes/Callable.xml b/doc/classes/Callable.xml index dd48ee67903..1fb4f919207 100644 --- a/doc/classes/Callable.xml +++ b/doc/classes/Callable.xml @@ -1,10 +1,10 @@ - An object representing a method in a certain object that can be called. + Built-in type representing a method in an object instance or a standalone function. - [Callable] is a first class object which can be held in variables and passed to functions. It represents a given method in an [Object], and is typically used for signal callbacks. + [Callable] is a built-in [Variant] type that represents a function. It can either be a method within an [Object] instance, or a standalone function not related to any object, like a lambda function. Like all [Variant] types, it can be stored in variables and passed to other functions. It is most commonly used for signal callbacks. [b]Example:[/b] [codeblocks] [gdscript] @@ -32,6 +32,18 @@ } [/csharp] [/codeblocks] + In GDScript, it's possible to create lambda functions within a method. Lambda functions are custom callables that are not associated with an [Object] instance. Optionally, lambda functions can also be named. The name will be displayed in the debugger, or when calling [method get_method]. + [codeblock] + func _init(): + var my_lambda = func (message): + print(message) + + # Prints Hello everyone! + my_lambda.call("Hello everyone!") + + # Prints "Attack!", when the button_pressed signal is emitted. + button_pressed.connect(func(): print("Attack!")) + [/codeblock] @@ -39,7 +51,7 @@ - Constructs a null [Callable] with no object nor method bound. + Constructs an empty [Callable], with no object nor method bound. @@ -54,7 +66,7 @@ - Creates a new [Callable] for the method called [param method] in the specified [param object]. + Creates a new [Callable] for the method named [param method] in the specified [param object]. @@ -62,7 +74,7 @@ - Returns a copy of this [Callable] with the arguments bound. Bound arguments are passed after the arguments supplied by [method call]. + Returns a copy of this [Callable] with one or more arguments bound. When called, the bound arguments are passed [i]after[/i] the arguments supplied by [method call]. @@ -85,13 +97,13 @@ - Calls the method represented by this [Callable]. Contrary to [method call], this method does not take a variable number of arguments but expects all arguments to be passed via a single [Array]. + Calls the method represented by this [Callable]. Unlike [method call], this method expects all arguments to be contained inside the [param arguments] [Array]. - Returns the name of the method represented by this [Callable]. + Returns the name of the method represented by this [Callable]. If the callable is a lambda function, returns the function's name. @@ -116,7 +128,7 @@ - Returns [code]true[/code] if this [Callable] is a custom callable whose behavior differs based on implementation details. Custom callables are used in the engine for various reasons. If [code]true[/code], you can't use [method get_method]. + Returns [code]true[/code] if this [Callable] is a custom callable. Custom callables are created from [method bind] or [method unbind]. In GDScript, lambda functions are also custom callables. @@ -128,33 +140,33 @@ - Returns [code]true[/code] if this [Callable] is a standard callable, referencing an object and a method using a [StringName]. + Returns [code]true[/code] if this [Callable] is a standard callable. This method is the opposite of [method is_custom]. Returns [code]false[/code] if this callable is a lambda function. - Returns [code]true[/code] if the object exists and has a valid function assigned, or is a custom callable. + Returns [code]true[/code] if the callable's object exists and has a valid method name assigned, or is a custom callable. - Perform an RPC (Remote Procedure Call). This is used for multiplayer and is normally not available unless the function being called has been marked as [i]RPC[/i]. Calling it on unsupported functions will result in an error. + Perform an RPC (Remote Procedure Call). This is used for multiplayer and is normally not available, unless the function being called has been marked as [i]RPC[/i]. Calling this method on unsupported functions will result in an error. - Perform an RPC (Remote Procedure Call) on a specific peer ID (see multiplayer documentation for reference). This is used for multiplayer and is normally not available unless the function being called has been marked as [i]RPC[/i]. Calling it on unsupported functions will result in an error. + Perform an RPC (Remote Procedure Call) on a specific peer ID (see multiplayer documentation for reference). This is used for multiplayer and is normally not available unless the function being called has been marked as [i]RPC[/i]. Calling this method on unsupported functions will result in an error. - Returns a copy of this [Callable] with the arguments unbound. Calling the returned [Callable] will call the method without the extra arguments that are supplied in the [Callable] on which you are calling this method. + Returns a copy of this [Callable] with the arguments unbound, as defined by [param argcount]. Calling the returned [Callable] will call the method without the extra arguments that are supplied in the [Callable] on which you are calling this method.