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objfunction.rs
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154 lines (138 loc) · 4.57 KB
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use crate::pyobject::{
AttributeProtocol, IdProtocol, PyContext, PyFuncArgs, PyObjectPayload, PyResult, TypeProtocol,
};
use crate::vm::VirtualMachine;
pub fn init(context: &PyContext) {
let function_type = &context.function_type;
context.set_attr(&function_type, "__get__", context.new_rustfunc(bind_method));
context.set_attr(
&function_type,
"__code__",
context.new_member_descriptor(function_code),
);
let builtin_function_or_method_type = &context.builtin_function_or_method_type;
context.set_attr(
&builtin_function_or_method_type,
"__get__",
context.new_rustfunc(bind_method),
);
let member_descriptor_type = &context.member_descriptor_type;
context.set_attr(
&member_descriptor_type,
"__get__",
context.new_rustfunc(member_get),
);
let classmethod_type = &context.classmethod_type;
context.set_attr(
&classmethod_type,
"__get__",
context.new_rustfunc(classmethod_get),
);
context.set_attr(
&classmethod_type,
"__new__",
context.new_rustfunc(classmethod_new),
);
let staticmethod_type = &context.staticmethod_type;
context.set_attr(
staticmethod_type,
"__get__",
context.new_rustfunc(staticmethod_get),
);
context.set_attr(
staticmethod_type,
"__new__",
context.new_rustfunc(staticmethod_new),
);
}
fn bind_method(vm: &mut VirtualMachine, args: PyFuncArgs) -> PyResult {
arg_check!(
vm,
args,
required = [(function, None), (obj, None), (cls, None)]
);
if obj.is(&vm.get_none()) && !cls.is(&obj.typ()) {
Ok(function.clone())
} else {
Ok(vm.ctx.new_bound_method(function.clone(), obj.clone()))
}
}
fn function_code(vm: &mut VirtualMachine, args: PyFuncArgs) -> PyResult {
match args.args[0].payload {
PyObjectPayload::Function { ref code, .. } => Ok(code.clone()),
_ => Err(vm.new_type_error("no code".to_string())),
}
}
fn member_get(vm: &mut VirtualMachine, mut args: PyFuncArgs) -> PyResult {
match args.shift().get_attr("function") {
Some(function) => vm.invoke(function, args),
None => {
let attribute_error = vm.context().exceptions.attribute_error.clone();
Err(vm.new_exception(attribute_error, String::from("Attribute Error")))
7582
}
}
}
// Classmethod type methods:
fn classmethod_get(vm: &mut VirtualMachine, args: PyFuncArgs) -> PyResult {
trace!("classmethod.__get__ {:?}", args.args);
arg_check!(
vm,
args,
required = [
(cls, Some(vm.ctx.classmethod_type())),
(_inst, None),
(owner, None)
]
);
match cls.get_attr("function") {
Some(function) => {
let py_obj = owner.clone();
let py_method = vm.ctx.new_bound_method(function, py_obj);
Ok(py_method)
}
None => {
let attribute_error = vm.context().exceptions.attribute_error.clone();
Err(vm.new_exception(
attribute_error,
String::from("Attribute Error: classmethod must have 'function' attribute"),
))
}
}
}
fn classmethod_new(vm: &mut VirtualMachine, args: PyFuncArgs) -> PyResult {
trace!("classmethod.__new__ {:?}", args.args);
arg_check!(vm, args, required = [(cls, None), (callable, None)]);
let py_obj = vm.ctx.new_instance(cls.clone(), None);
vm.ctx.set_attr(&py_obj, "function", callable.clone());
Ok(py_obj)
}
// `staticmethod` methods.
fn staticmethod_get(vm: &mut VirtualMachine, args: PyFuncArgs) -> PyResult {
trace!("staticmethod.__get__ {:?}", args.args);
arg_check!(
vm,
args,
required = [
(cls, Some(vm.ctx.staticmethod_type())),
(_inst, None),
(_owner, None)
]
);
match cls.get_attr("function") {
Some(function) => Ok(function),
None => {
let attribute_error = vm.context().exceptions.attribute_error.clone();
Err(vm.new_exception(
attribute_error,
String::from("Attribute Error: staticmethod must have 'function' attribute"),
))
}
}
}
fn staticmethod_new(vm: &mut VirtualMachine, args: PyFuncArgs) -> PyResult {
trace!("staticmethod.__new__ {:?}", args.args);
arg_check!(vm, args, required = [(cls, None), (callable, None)]);
let py_obj = vm.ctx.new_instance(cls.clone(), None);
vm.ctx.set_attr(&py_obj, "function", callable.clone());
Ok(py_obj)
}