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Auto merge of #7395 - Manishearth:doc-inherit, r=nox

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Document InheritTypes



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This commit is contained in:
bors-servo 2015-08-26 20:56:02 -06:00
commit 98728a6c75
1 changed files with 11 additions and 3 deletions
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14
components/script/dom/bindings/codegen/CodegenRust.py
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@ -5773,12 +5773,17 @@ class GlobalGenRoots():
CGGeneric("use std::mem;\n\n")] CGGeneric("use std::mem;\n\n")]
for descriptor in descriptors: for descriptor in descriptors:
name = descriptor.name name = descriptor.name
protos = [CGGeneric('pub trait %s : Sized {}\n' % (name + 'Base'))] protos = [CGGeneric("""\
/// Types which are derived from `%(name)s` and can be freely converted
/// to `%(name)s`
pub trait %(name)sBase : Sized {}\n""" % {'name': name})]
for proto in descriptor.prototypeChain: for proto in descriptor.prototypeChain:
protos += [CGGeneric('impl %s for %s {}\n' % (proto + 'Base', protos += [CGGeneric('impl %s for %s {}\n' % (proto + 'Base',
descriptor.concreteType))] descriptor.concreteType))]
derived = [CGGeneric('pub trait %s : Sized { fn %s(&self) -> bool; }\n' % derived = [CGGeneric("""\
(name + 'Derived', 'is_' + name.lower()))] /// Types which `%(name)s` derives from
pub trait %(name)sDerived : Sized { fn %(method)s(&self) -> bool; }\n""" %
{'name': name, 'method': 'is_' + name.lower()})]
for protoName in descriptor.prototypeChain[1:-1]: for protoName in descriptor.prototypeChain[1:-1]:
protoDescriptor = config.getDescriptor(protoName) protoDescriptor = config.getDescriptor(protoName)
delegate = string.Template("""\ delegate = string.Template("""\
@ -5800,6 +5805,8 @@ impl ${selfName} for ${baseName} {
pub struct ${name}Cast; pub struct ${name}Cast;
impl ${name}Cast { impl ${name}Cast {
#[inline] #[inline]
/// Downcast an instance of a base class of `${name}` to an instance of
/// `${name}`, if it internally is an instance of `${name}`
pub fn to_ref<'a, T: ${toBound}+Reflectable>(base: &'a T) -> Option<&'a ${name}> { pub fn to_ref<'a, T: ${toBound}+Reflectable>(base: &'a T) -> Option<&'a ${name}> {
match base.${checkFn}() { match base.${checkFn}() {
true => Some(unsafe { mem::transmute(base) }), true => Some(unsafe { mem::transmute(base) }),
@ -5827,6 +5834,7 @@ impl ${name}Cast {
} }
#[inline] #[inline]
/// Upcast an instance of a derived class of `${name}` to `${name}`
pub fn from_ref<'a, T: ${fromBound}+Reflectable>(derived: &'a T) -> &'a ${name} { pub fn from_ref<'a, T: ${fromBound}+Reflectable>(derived: &'a T) -> &'a ${name} {
unsafe { mem::transmute(derived) } unsafe { mem::transmute(derived) }
} }