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Make callers of ${Derived}::${base}() use casts instead.

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This commit is contained in:
Tetsuharu OHZEKI 2014-11-28 05:55:47 +09:00
parent 431644bfc8
commit 3681628936
1 changed files with 9 additions and 3 deletions
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12
components/script/dom/bindings/codegen/CodegenRust.py
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@ -5185,7 +5185,8 @@ class GlobalGenRoots():
CGGeneric("use dom::bindings::js::{JS, JSRef, Temporary};\n"),
CGGeneric("use dom::bindings::trace::JSTraceable;\n"),
CGGeneric("use dom::bindings::utils::Reflectable;\n"),
CGGeneric("use js::jsapi::JSTracer;\n\n")]
CGGeneric("use js::jsapi::JSTracer;\n\n"),
CGGeneric("use std::mem;\n\n")]
for descriptor in descriptors:
name = descriptor.name
protos = [CGGeneric('pub trait %s {}\n' % (name + 'Base'))]
@ -5199,13 +5200,13 @@ class GlobalGenRoots():
delegate = string.Template('''impl ${selfName} for ${baseName} {
#[inline]
fn ${fname}(&self) -> bool {
self.${parentName}().${fname}()
${parentName}Cast::from_actual(self).${fname}()
}
}
''').substitute({'fname': 'is_' + name.lower(),
'selfName': name + 'Derived',
'baseName': protoDescriptor.concreteType,
'parentName': protoDescriptor.prototypeChain[-2].lower()})
'parentName': protoDescriptor.prototypeChain[-2]})
derived += [CGGeneric(delegate)]
derived += [CGGeneric('\n')]
@ -5251,6 +5252,11 @@ class GlobalGenRoots():
fn from_temporary<T: ${fromBound}+Reflectable>(derived: Temporary<T>) -> Temporary<Self> {
unsafe { derived.transmute() }
}
#[inline(always)]
fn from_actual<'a, T: ${fromBound}+Reflectable>(derived: &T) -> &'a Self {
unsafe { mem::transmute(derived) }
}
}
''').substitute({'checkFn': 'is_' + name.lower(),
'castTraitName': name + 'Cast',