Notation used in Ruby API documentation
Module: tl
Description: A generalization of script interpreters
The main purpose of this class is to provide cross-language call options. Using the Python interpreter, it is possible to execute Python code from Ruby for example.
The following example shows how to use the interpreter class to execute Python code from Ruby and how to pass values from Ruby to Python and back using the Value wrapper object:
pya = RBA::Interpreter::python_interpreter
out_param = RBA::Value::new(17)
pya.define_variable("out_param", out_param)
pya.eval_string(<<END)
print("This is Python now!")
out_param.value = out_param.value + 25
END
puts out_param.value # gives '42'This class was introduced in version 0.27.5.
| new Interpreter ptr | new | Creates a new object of this class |
| [const] | Interpreter ptr | _const_cast | Returns a non-const reference to self. | |
| void | _create | Ensures the C++ object is created | ||
| void | _destroy | Explicitly destroys the object | ||
| [const] | bool | _destroyed? | Returns a value indicating whether the object was already destroyed | |
| [const] | bool | _is_const_object? | Returns a value indicating whether the reference is a const reference | |
| void | _manage | Marks the object as managed by the script side. | ||
| void | _unmanage | Marks the object as no longer owned by the script side. | ||
| void | define_variable | (string name, variant value) | Defines a (global) variable with the given name and value | |
| variant | eval_expr | (string string, string filename = nil, int line = 1) | Executes the expression inside the given string and returns the result value | |
| void | eval_string | (string string, string filename = nil, int line = 1) | Executes the code inside the given string | |
| void | load_file | (string path) | Loads the given file into the interpreter |
| Interpreter ptr | python_interpreter | Gets the instance of the Python interpreter | ||
| Interpreter ptr | ruby_interpreter | Gets the instance of the Ruby interpreter |
| void | create | Use of this method is deprecated. Use _create instead | ||
| void | destroy | Use of this method is deprecated. Use _destroy instead | ||
| [const] | bool | destroyed? | Use of this method is deprecated. Use _destroyed? instead | |
| [const] | bool | is_const_object? | Use of this method is deprecated. Use _is_const_object? instead |
_const_cast | Signature: [const] Interpreter ptr _const_cast Description: Returns a non-const reference to self. Basically, this method allows turning a const object reference to a non-const one. This method is provided as last resort to remove the constness from an object. Usually there is a good reason for a const object reference, so using this method may have undesired side effects. This method has been introduced in version 0.29.6. |
_create | Signature: void _create Description: Ensures the C++ object is created Use this method to ensure the C++ object is created, for example to ensure that resources are allocated. Usually C++ objects are created on demand and not necessarily when the script object is created. |
_destroy | Signature: void _destroy Description: Explicitly destroys the object Explicitly destroys the object on C++ side if it was owned by the script interpreter. Subsequent access to this object will throw an exception. If the object is not owned by the script, this method will do nothing. |
_destroyed? | Signature: [const] bool _destroyed? Description: Returns a value indicating whether the object was already destroyed This method returns true, if the object was destroyed, either explicitly or by the C++ side. The latter may happen, if the object is owned by a C++ object which got destroyed itself. |
_is_const_object? | Signature: [const] bool _is_const_object? Description: Returns a value indicating whether the reference is a const reference This method returns true, if self is a const reference. In that case, only const methods may be called on self. |
_manage | Signature: void _manage Description: Marks the object as managed by the script side. After calling this method on an object, the script side will be responsible for the management of the object. This method may be called if an object is returned from a C++ function and the object is known not to be owned by any C++ instance. If necessary, the script side may delete the object if the script's reference is no longer required. Usually it's not required to call this method. It has been introduced in version 0.24. |
_unmanage | Signature: void _unmanage Description: Marks the object as no longer owned by the script side. Calling this method will make this object no longer owned by the script's memory management. Instead, the object must be managed in some other way. Usually this method may be called if it is known that some C++ object holds and manages this object. Technically speaking, this method will turn the script's reference into a weak reference. After the script engine decides to delete the reference, the object itself will still exist. If the object is not managed otherwise, memory leaks will occur. Usually it's not required to call this method. It has been introduced in version 0.24. |
create | Signature: void create Description: Ensures the C++ object is created Use of this method is deprecated. Use _create instead Use this method to ensure the C++ object is created, for example to ensure that resources are allocated. Usually C++ objects are created on demand and not necessarily when the script object is created. |
define_variable | Signature: void define_variable (string name, variant value) Description: Defines a (global) variable with the given name and value You can use the Value class to provide 'out' or 'inout' parameters which can be modified by code executed inside the interpreter and read back by the caller. |
destroy | Signature: void destroy Description: Explicitly destroys the object Use of this method is deprecated. Use _destroy instead Explicitly destroys the object on C++ side if it was owned by the script interpreter. Subsequent access to this object will throw an exception. If the object is not owned by the script, this method will do nothing. |
destroyed? | Signature: [const] bool destroyed? Description: Returns a value indicating whether the object was already destroyed Use of this method is deprecated. Use _destroyed? instead This method returns true, if the object was destroyed, either explicitly or by the C++ side. The latter may happen, if the object is owned by a C++ object which got destroyed itself. |
eval_expr | Signature: variant eval_expr (string string, string filename = nil, int line = 1) Description: Executes the expression inside the given string and returns the result value Use 'filename' and 'line' to indicate the original source for the error messages. |
eval_string | Signature: void eval_string (string string, string filename = nil, int line = 1) Description: Executes the code inside the given string Use 'filename' and 'line' to indicate the original source for the error messages. |
is_const_object? | Signature: [const] bool is_const_object? Description: Returns a value indicating whether the reference is a const reference Use of this method is deprecated. Use _is_const_object? instead This method returns true, if self is a const reference. In that case, only const methods may be called on self. |
load_file | Signature: void load_file (string path) Description: Loads the given file into the interpreter This will execute the code inside the file. |
new | Signature: [static] new Interpreter ptr new Description: Creates a new object of this class Python specific notes: |
python_interpreter | Signature: [static] Interpreter ptr python_interpreter Description: Gets the instance of the Python interpreter |
ruby_interpreter | Signature: [static] Interpreter ptr ruby_interpreter Description: Gets the instance of the Ruby interpreter |