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Add __repr__ and __new__ to NoneType. #446

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Merged
merged 1 commit into from
Feb 12, 2019
Merged

Add __repr__ and __new__ to NoneType. #446

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4 changes: 4 additions & 0 deletions tests/snippets/none.py
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Original file line number Diff line number Diff line change
Expand Up @@ -14,3 +14,7 @@ def none2():
assert none() is x

assert none() is none2()

assert str(None) == 'None'
assert repr(None) == 'None'
assert type(None)() is None
1 change: 1 addition & 0 deletions vm/src/obj/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@ pub mod objiter;
pub mod objlist;
pub mod objmap;
pub mod objmemory;
pub mod objnone;
pub mod objobject;
pub mod objproperty;
pub mod objrange;
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23 changes: 23 additions & 0 deletions vm/src/obj/objnone.rs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,23 @@
use super::super::pyobject::{PyContext, PyFuncArgs, PyObjectRef, PyResult, TypeProtocol};
use super::super::vm::VirtualMachine;
use super::objtype;

pub fn init(context: &PyContext) {
let none_type = &context.none.typ();
context.set_attr(&none_type, "__new__", context.new_rustfunc(none_new));
context.set_attr(&none_type, "__repr__", context.new_rustfunc(none_repr));
}

fn none_new(vm: &mut VirtualMachine, args: PyFuncArgs) -> PyResult {
arg_check!(
vm,
args,
required = [(_zelf, Some(vm.ctx.type_type.clone()))]
);
Ok(vm.get_none())
}

fn none_repr(vm: &mut VirtualMachine, args: PyFuncArgs) -> PyResult {
arg_check!(vm, args, required = [(_zelf, Some(vm.ctx.none().typ()))]);
Ok(vm.ctx.new_str("None".to_string()))
}
2 changes: 2 additions & 0 deletions vm/src/pyobject.rs
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Expand Up @@ -18,6 +18,7 @@ use super::obj::objiter;
use super::obj::objlist;
use super::obj::objmap;
use super::obj::objmemory;
use super::obj::objnone;
use super::obj::objobject;
use super::obj::objproperty;
use super::obj::objrange;
Expand Down Expand Up @@ -318,6 +319,7 @@ impl PyContext {
objbool::init(&context);
objcode::init(&context);
objframe::init(&context);
objnone::init(&context);
exceptions::init(&context);
context
}
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