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auto merge of #4515 : brunoabinader/servo/codegen-cleanup, r=Ms2ger

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Main changes:
- Whitespace (indent) fixes;
- CGIndent-related fixes;
- Removed consecutive empty lines;
- Removed empty lines before closing brackets;
- Codegen style fixes;

Tests:

We don't have a static code style analyzer yet, so I've checked using the following (together with manual lookup at some selected generated bindings):

1. Check for lines with wrong indentation (1 to 3 whitespaces at the beginning)
Command: ```$ pcregrep -r "^[ ]{1,3}[^ ]" components/script/dom/bindings/codegen/Bindings```
Expected: None
Actual: None

2. Check for lines with wrong indentation (5 to 7 whitespaces at the beginning)
Command: ```$ pcregrep -r "^[ ]{5,7}[^ ]" components/script/dom/bindings/codegen/Bindings```
Expected: None
Actual: None

3. Check for lonely semicolons
Command: ```$ pcregrep -r " \{0,\};" components/script/dom/bindings/codegen/Bindings```
Expected: None
Actual: None

4. Check for empty lines before closing brackets
Command: ```$ pcregrep -r -M "^$\n {0,}\}" components/script/dom/bindings/codegen/Bindings```
Expected: None
Actual: None

5. Check for consecutive empty lines
Command: ```$ pcregrep -r -M "^$\n^$\n" components/script/dom/bindings/codegen/Bindings```
Expected: None
Actual:
```components/script/dom/bindings/codegen/Bindings/ChildNodeBinding.rs
components/script/dom/bindings/codegen/Bindings/ElementCSSInlineStyleBinding.rs
components/script/dom/bindings/codegen/Bindings/ParentNodeBinding.rs
components/script/dom/bindings/codegen/Bindings/URLUtilsBinding.rs
components/script/dom/bindings/codegen/Bindings/URLUtilsReadOnlyBinding.rs
```
All of the above are ```[NoInterfaceObject]```, thus providing only imports. We shouldn’t, however, generate empty lines (investigate this later on).
This commit is contained in:
bors-servo 2014-12-30 09:51:45 -07:00
commit 37a97f3273
1 changed files with 442 additions and 435 deletions
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163
components/script/dom/bindings/codegen/CodegenRust.py
View file

@ -103,12 +103,12 @@ class CastableObjectUnwrapper():
def __init__(self, descriptor, source, codeOnFailure):
self.substitution = {
"source": source,
"codeOnFailure": CGIndenter(CGGeneric(codeOnFailure), 4).define(),
"codeOnFailure": CGIndenter(CGGeneric(codeOnFailure), 8).define(),
}
def __str__(self):
return string.Template(
"""match unwrap_jsmanaged(${source}) {
return string.Template("""\
match unwrap_jsmanaged(${source}) {
Ok(val) => val,
Err(()) => {
${codeOnFailure}
@ -374,7 +374,7 @@ class CGMethodCall(CGThing):
CGSwitch("argcount",
argCountCases,
CGGeneric("throw_type_error(cx, \"Not enough arguments to %s.\");\n"
"return 0;\n" % methodName)))
"return 0;" % methodName)))
#XXXjdm Avoid unreachable statement warnings
#overloadCGThings.append(
# CGGeneric('panic!("We have an always-returning default case");\n'
@ -509,9 +509,7 @@ def getJSToNativeConversionTemplate(type, descriptorProvider, failureCode=None,
return string[0].upper() + string[1:]
# Helper functions for dealing with failures due to the JS value being the
# wrong type of value
# Helper functions for dealing with failures due to the JS value being the
# wrong type of value
# wrong type of value.
def onFailureNotAnObject(failureCode):
return CGWrapper(
CGGeneric(
@ -532,9 +530,7 @@ def getJSToNativeConversionTemplate(type, descriptorProvider, failureCode=None,
CGGeneric(
failureCode or
('throw_type_error(cx, \"%s is not callable.\");\n'
'%s' % (firstCap(sourceDescription), exceptionCode))),
post="\n")
'%s' % (firstCap(sourceDescription), exceptionCode))))
# A helper function for handling null default values. Checks that the
# default value, if it exists, is null.
@ -565,8 +561,7 @@ def getJSToNativeConversionTemplate(type, descriptorProvider, failureCode=None,
templateBody += (
"} else {\n" +
CGIndenter(onFailureNotAnObject(failureCode)).define() +
"}\n")
"}")
return templateBody
assert not (isEnforceRange and isClamp) # These are mutually exclusive
@ -1017,7 +1012,10 @@ def wrapForType(jsvalRef, result='result', successCode='return 1;'):
* 'result': the name of the variable in which the Rust value is stored;
* 'successCode': the code to run once we have done the conversion.
"""
return "%s = (%s).to_jsval(cx);\n%s" % (jsvalRef, result, successCode)
wrap = "%s = (%s).to_jsval(cx);" % (jsvalRef, result)
if successCode:
wrap += "\n%s" % successCode
return wrap
def typeNeedsCx(type, retVal=False):
@ -1149,7 +1147,7 @@ class PropertyDefiner:
return (("const %s: &'static [%s] = &[\n" +
",\n".join(specs) + "\n" +
"];\n\n") % (name, specType))
"];\n") % (name, specType))
# The length of a method is the maximum of the lengths of the
# argument lists of all its overloads.
@ -1317,7 +1315,7 @@ class CGIndenter(CGThing):
A class that takes another CGThing and generates code that indents that
CGThing by some number of spaces. The default indent is two spaces.
"""
def __init__(self, child, indentLevel=2):
def __init__(self, child, indentLevel=4):
CGThing.__init__(self)
self.child = child
self.indent = " " * indentLevel
@ -1400,7 +1398,7 @@ class CGTemplatedType(CGWrapper):
class CGNamespace(CGWrapper):
def __init__(self, namespace, child, public=False):
pre = "%smod %s {\n" % ("pub " if public else "", namespace)
post = "} // mod %s\n" % namespace
post = "} // mod %s" % namespace
CGWrapper.__init__(self, child, pre=pre, post=post)
@staticmethod
@ -1421,7 +1419,8 @@ def DOMClass(descriptor):
# padding.
protoList.extend(['PrototypeList::ID::Count'] * (descriptor.config.maxProtoChainLength - len(protoList)))
prototypeChainString = ', '.join(protoList)
return """DOMClass {
return """\
DOMClass {
interface_chain: [ %s ],
native_hooks: &sNativePropertyHooks,
}""" % prototypeChainString
@ -1442,7 +1441,7 @@ class CGDOMJSClass(CGThing):
else:
flags = "0"
slots = "1"
return """
return """\
const Class_name: [u8, ..%i] = %s;
static Class: DOMJSClass = DOMJSClass {
base: js::Class {
@ -1526,7 +1525,7 @@ class CGPrototypeJSClass(CGThing):
self.descriptor = descriptor
def define(self):
return """
return """\
const PrototypeClassName__: [u8, ..%s] = %s;
static PrototypeClass: JSClass = JSClass {
name: &PrototypeClassName__ as *const u8 as *const libc::c_char,
@ -1559,7 +1558,7 @@ class CGInterfaceObjectJSClass(CGThing):
return ""
ctorname = "0 as *const u8" if not self.descriptor.interface.ctor() else CONSTRUCT_HOOK_NAME
hasinstance = HASINSTANCE_HOOK_NAME
return """
return """\
const InterfaceObjectClass: JSClass = {
%s, 0,
JS_PropertyStub,
@ -1620,7 +1619,8 @@ class CGGeneric(CGThing):
class CGCallbackTempRoot(CGGeneric):
def __init__(self, name):
val = "%s::new(tempRoot)" % name
define = """{
define = """\
{
let tempRoot = ${val}.to_object();
%s
}""" % val
@ -1778,7 +1778,7 @@ class CGAbstractMethod(CGThing):
def define(self):
body = self.definition_body()
if self.unsafe:
body = CGWrapper(body, pre="unsafe {\n", post="\n}")
body = CGWrapper(CGIndenter(body), pre="unsafe {\n", post="\n}")
return CGWrapper(CGIndenter(body),
pre=self.definition_prologue(),
@ -1805,8 +1805,7 @@ let obj = with_compartment(aCx, proto, || {
proto, %s,
ptr::null_mut(), ptr::null_mut())
});
assert!(obj.is_not_null());
assert!(obj.is_not_null());\
""" % (descriptor.name, parent)
else:
if descriptor.isGlobal():
@ -1815,11 +1814,11 @@ assert!(obj.is_not_null());
create += ("let obj = with_compartment(aCx, proto, || {\n"
" JS_NewObject(aCx, &Class.base as *const js::Class as *const JSClass, &*proto, &*%s)\n"
"});\n" % parent)
create += """assert!(obj.is_not_null());
create += """\
assert!(obj.is_not_null());
JS_SetReservedSlot(obj, DOM_OBJECT_SLOT as u32,
PrivateValue(squirrel_away_unique(aObject) as *const libc::c_void));
"""
PrivateValue(squirrel_away_unique(aObject) as *const libc::c_void));"""
return create
class CGWrapMethod(CGAbstractMethod):
@ -1881,7 +1880,7 @@ class CGIDLInterface(CGThing):
'type': self.descriptor.name,
'depth': self.descriptor.interface.inheritanceDepth(),
}
return string.Template("""
return string.Template("""\
impl IDLInterface for ${type} {
fn get_prototype_id(_: Option<${type}>) -> PrototypeList::ID {
PrototypeList::ID::${type}
@ -1999,7 +1998,8 @@ class CGCreateInterfaceObjectsMethod(CGAbstractMethod):
else:
constructor = 'None'
call = """return CreateInterfaceObjects2(aCx, aGlobal, aReceiver, parentProto,
call = """\
return CreateInterfaceObjects2(aCx, aGlobal, aReceiver, parentProto,
&PrototypeClass, %s,
%s,
&sNativeProperties);""" % (constructor, domClass)
@ -2127,13 +2127,12 @@ let traps = ProxyTraps {
trace: Some(%s)
};
CreateProxyHandler(&traps, &Class as *const _ as *const _)
CreateProxyHandler(&traps, &Class as *const _ as *const _)\
""" % (customDefineProperty, customDelete, FINALIZE_HOOK_NAME,
TRACE_HOOK_NAME)
return CGGeneric(body)
class CGDefineDOMInterfaceMethod(CGAbstractMethod):
"""
A method for resolve hooks to try to lazily define the interface object for
@ -2226,7 +2225,7 @@ class CGCallGenerator(CGThing):
" throw_dom_exception(cx, global.root_ref(), e);\n"
" return%s;\n"
" },\n"
"};\n" % (glob, errorResult)))
"};" % (glob, errorResult)))
if typeRetValNeedsRooting(returnType):
self.cgRoot.append(CGGeneric("let result = result.root();"))
@ -2552,7 +2551,7 @@ class CGGenericGetter(CGAbstractBindingMethod):
def generate_code(self):
return CGGeneric(
"let info: *const JSJitInfo = RUST_FUNCTION_VALUE_TO_JITINFO(JS_CALLEE(cx, vp));\n"
"return CallJitPropertyOp(info, cx, obj, this.unsafe_get() as *mut libc::c_void, vp);\n")
"return CallJitPropertyOp(info, cx, obj, this.unsafe_get() as *mut libc::c_void, vp);")
class CGSpecializedGetter(CGAbstractExternMethod):
"""
@ -2677,7 +2676,7 @@ class CGStaticSetter(CGAbstractStaticBindingMethod):
"if (argc == 0) {\n"
" throw_type_error(cx, \"Not enough arguments to %s setter.\");\n"
" return 0;\n"
"}\n" % self.attr.identifier.name)
"}" % self.attr.identifier.name)
call = CGSetterCall([], self.attr.type, nativeName, self.descriptor,
self.attr)
return CGList([checkForArg, call])
@ -2696,8 +2695,7 @@ class CGMemberJITInfo(CGThing):
protoID = "PrototypeList::ID::%s as u32" % self.descriptor.name
depth = self.descriptor.interface.inheritanceDepth()
failstr = "true" if infallible else "false"
return ("\n"
"const %s: JSJitInfo = JSJitInfo {\n"
return ("const %s: JSJitInfo = JSJitInfo {\n"
" op: %s as *const u8,\n"
" protoID: %s,\n"
" depth: %s,\n"
@ -2715,7 +2713,7 @@ class CGMemberJITInfo(CGThing):
setterinfo = ("%s_setterinfo" % self.member.identifier.name)
setter = ("set_%s" % self.member.identifier.name)
# Setters are always fallible, since they have to do a typed unwrap.
result += self.defineJitInfo(setterinfo, setter, False)
result += "\n" + self.defineJitInfo(setterinfo, setter, False)
return result
if self.member.isMethod():
methodinfo = ("%s_methodinfo" % self.member.identifier.name)
@ -2763,7 +2761,7 @@ class CGEnum(CGThing):
def __init__(self, enum):
CGThing.__init__(self)
decl = """
decl = """\
#[repr(uint)]
#[deriving(PartialEq)]
#[jstraceable]
@ -2772,7 +2770,7 @@ pub enum %s {
}
""" % (enum.identifier.name, ",\n ".join(map(getEnumValueName, enum.values())))
inner = """
inner = """\
use dom::bindings::conversions::ToJSValConvertible;
use js::jsapi::JSContext;
use js::jsval::JSVal;
@ -2890,7 +2888,8 @@ class CGUnionStruct(CGThing):
]
# XXXManishearth The following should be #[must_root],
# however we currently allow it till #2661 is fixed
return ("""#[allow(unrooted_must_root)]
return ("""\
#[allow(unrooted_must_root)]
pub enum %s {
%s
}
@ -3147,7 +3146,8 @@ class ClassUsingDeclaration(ClassItem):
ClassItem.__init__(self, name, visibility)
def declare(self, cgClass):
return string.Template("""using ${baseClass}::${name};
return string.Template("""\
using ${baseClass}::${name};
""").substitute({ 'baseClass': self.baseClass,
'name': self.name })
@ -3224,7 +3224,8 @@ class ClassConstructor(ClassItem):
body += '\n'
body = ' {\n' + body + '}'
return string.Template("""pub fn ${decorators}new(${args}) -> ${className}${body}
return string.Template("""\
pub fn ${decorators}new(${args}) -> ${className}${body}
""").substitute({ 'decorators': self.getDecorators(True),
'className': cgClass.getNameString(),
'args': args,
@ -3241,7 +3242,8 @@ class ClassConstructor(ClassItem):
if len(body) > 0:
body += '\n'
return string.Template("""${decorators}
return string.Template("""\
${decorators}
${className}::${className}(${args})${initializationList}
{${body}}
""").substitute({ 'decorators': self.getDecorators(False),
@ -3297,7 +3299,8 @@ class ClassDestructor(ClassItem):
else:
body = ';'
return string.Template("""${decorators}~${className}()${body}
return string.Template("""\
${decorators}~${className}()${body}
""").substitute({ 'decorators': self.getDecorators(True),
'className': cgClass.getNameString(),
'body': body })
@ -3311,7 +3314,8 @@ class ClassDestructor(ClassItem):
if len(body) > 0:
body += '\n'
return string.Template("""${decorators}
return string.Template("""\
${decorators}
${className}::~${className}()
{${body}}
""").substitute({ 'decorators': self.getDecorators(False),
@ -3444,7 +3448,7 @@ class CGClass(CGThing):
assert len(self.bases) == 1 #XXjdm Can we support multiple inheritance?
result += '{\n%s\n' % self.indent
result += ' {\n'
if self.bases:
self.members = [ClassMember("parent", self.bases[0].name, "pub")] + self.members
@ -3599,7 +3603,8 @@ class CGProxyUnwrap(CGAbstractMethod):
CGAbstractMethod.__init__(self, descriptor, "UnwrapProxy", '*const ' + descriptor.concreteType, args, alwaysInline=True)
def definition_body(self):
return CGGeneric("""/*if (xpc::WrapperFactory::IsXrayWrapper(obj)) {
return CGGeneric("""\
/*if (xpc::WrapperFactory::IsXrayWrapper(obj)) {
obj = js::UnwrapObject(obj);
}*/
//MOZ_ASSERT(IsProxy(obj));
@ -3683,7 +3688,8 @@ class CGDOMJSProxyHandler_getOwnPropertyDescriptor(CGAbstractExternMethod):
else:
namedGet = ""
return setOrIndexedGet + """let expando: *mut JSObject = GetExpandoObject(proxy);
return setOrIndexedGet + """\
let expando: *mut JSObject = GetExpandoObject(proxy);
//if (!xpc::WrapperFactory::IsXrayWrapper(proxy) && (expando = GetExpandoObject(proxy))) {
if expando.is_not_null() {
let flags = if set { JSRESOLVE_ASSIGNING } else { 0 } | JSRESOLVE_QUALIFIED;
@ -3696,7 +3702,7 @@ if expando.is_not_null() {
return true;
}
}
""" + namedGet + """
""" + namedGet + """\
(*desc).obj = ptr::null_mut();
return true;"""
@ -3741,7 +3747,7 @@ class CGDOMJSProxyHandler_defineProperty(CGAbstractExternMethod):
" let this = UnwrapProxy(proxy);\n" +
" let this = JS::from_raw(this);\n" +
" let this = this.root();\n" +
CGIndenter(CGProxyNamedSetter(self.descriptor)).define() + "\n" +
CGIndenter(CGProxyNamedSetter(self.descriptor)).define() +
"}\n")
elif self.descriptor.operations['NamedGetter']:
set += ("if RUST_JSID_IS_STRING(id) != 0 {\n" +
@ -3820,7 +3826,8 @@ class CGDOMJSProxyHandler_hasOwn(CGAbstractExternMethod):
else:
named = ""
return indexed + """let expando: *mut JSObject = GetExpandoObject(proxy);
return indexed + """\
let expando: *mut JSObject = GetExpandoObject(proxy);
if expando.is_not_null() {
let mut b: JSBool = 1;
let ok = JS_HasPropertyById(cx, expando, id, &mut b) != 0;
@ -3829,8 +3836,8 @@ if expando.is_not_null() {
return ok;
}
}
""" + named + """*bp = false;
""" + named + """\
*bp = false;
return true;"""
def definition_body(self):
@ -3844,7 +3851,8 @@ class CGDOMJSProxyHandler_get(CGAbstractExternMethod):
CGAbstractExternMethod.__init__(self, descriptor, "get", "bool", args)
self.descriptor = descriptor
def getBody(self):
getFromExpando = """let expando = GetExpandoObject(proxy);
getFromExpando = """\
let expando = GetExpandoObject(proxy);
if expando.is_not_null() {
let mut hasProp = 0;
if JS_HasPropertyById(cx, expando, id, &mut hasProp) == 0 {
@ -3870,7 +3878,7 @@ if expando.is_not_null() {
" let this = JS::from_raw(this);\n" +
" let this = this.root();\n" +
CGIndenter(CGProxyIndexedGetter(self.descriptor, templateValues)).define())
getIndexedOrExpando += """
getIndexedOrExpando += """\
// Even if we don't have this index, we don't forward the
// get on to our expando object.
} else {
@ -3892,7 +3900,8 @@ if expando.is_not_null() {
else:
getNamed = ""
return """//MOZ_ASSERT(!xpc::WrapperFactory::IsXrayWrapper(proxy),
return """\
//MOZ_ASSERT(!xpc::WrapperFactory::IsXrayWrapper(proxy),
//"Should not have a XrayWrapper here");
%s
@ -3931,8 +3940,7 @@ class CGDOMJSProxyHandler_obj_toString(CGAbstractExternMethod):
else:
error = None
call = CGCallGenerator(error, [], "", returnType, extendedAttributes, self.descriptor, nativeName, False, object="UnwrapProxy(proxy)")
return call.define() + """
return call.define() + """\
JSString* jsresult;
return xpc_qsStringToJsstring(cx, result, &jsresult) ? jsresult : NULL;"""
@ -3966,9 +3974,10 @@ let this: *const %s = unwrap::<%s>(obj);
assert(False)
def finalizeHook(descriptor, hookName, context):
release = """let value = unwrap::<%s>(obj);
release = """\
let value = unwrap::<%s>(obj);
let _: Box<%s> = mem::transmute(value);
debug!("%s finalize: {:p}", this);
debug!("%s finalize: {:p}", this);\
""" % (descriptor.concreteType, descriptor.concreteType, descriptor.concreteType)
return release
@ -4027,10 +4036,7 @@ class CGDOMJSProxyHandlerDOMClass(CGThing):
self.descriptor = descriptor
def define(self):
return """
static Class: DOMClass = """ + DOMClass(self.descriptor) + """;
"""
return "static Class: DOMClass = " + DOMClass(self.descriptor) + ";\n"
class CGInterfaceTrait(CGThing):
@ -4218,7 +4224,6 @@ class CGDescriptor(CGThing):
cgThings.append(CGInterfaceTrait(descriptor))
cgThings = CGList(cgThings, "\n")
cgThings = CGWrapper(cgThings, pre='\n', post='\n')
#self.cgRoot = CGWrapper(CGNamespace(toBindingNamespace(descriptor.name),
# cgThings),
# post='\n')
@ -4350,8 +4355,8 @@ class CGDictionary(CGThing):
" }\n"
"}").substitute({
"selfName": self.makeClassName(d),
"initParent": CGIndenter(CGGeneric(initParent), indentLevel=6).define(),
"initMembers": CGIndenter(memberInits, indentLevel=6).define(),
"initParent": CGIndenter(CGGeneric(initParent), indentLevel=12).define(),
"initMembers": CGIndenter(memberInits, indentLevel=12).define(),
})
@staticmethod
@ -4652,7 +4657,6 @@ class CGNativeMember(ClassMethod):
# have a non-void return type, as const.
const=(not member.isStatic() and member.isAttr() and
not signature[0].isVoid()),
breakAfterReturnDecl=" ",
breakAfterSelf=breakAfterSelf,
visibility=visibility)
@ -4785,7 +4789,8 @@ class CGCallbackFunction(CGCallback):
class CGCallbackFunctionImpl(CGGeneric):
def __init__(self, callback):
impl = string.Template("""impl CallbackContainer for ${type} {
impl = string.Template("""\
impl CallbackContainer for ${type} {
fn new(callback: *mut JSObject) -> ${type} {
${type}::new(callback)
}
@ -4799,7 +4804,7 @@ impl ToJSValConvertible for ${type} {
fn to_jsval(&self, cx: *mut JSContext) -> JSVal {
self.callback().to_jsval(cx)
}
}
}\
""").substitute({"type": callback.name})
CGGeneric.__init__(self, impl)
@ -4867,7 +4872,7 @@ class CallbackMember(CGNativeMember):
jsObjectsArePtr=True)
# We have to do all the generation of our body now, because
# the caller relies on us throwing if we can't manage it.
self.exceptionCode= "return Err(FailureUnknown);\n"
self.exceptionCode= "return Err(FailureUnknown);"
self.body = self.getImpl()
def getImpl(self):
@ -4959,7 +4964,7 @@ class CallbackMember(CGNativeMember):
conversion = string.Template(
"for idx in range(0, ${arg}.len()) {\n" +
CGIndenter(CGGeneric(conversion)).define() + "\n"
"}\n"
"}"
).substitute({ "arg": arg.identifier.name })
elif arg.optional and not arg.defaultValue:
conversion = (
@ -5064,7 +5069,7 @@ class CallCallback(CallbackMethod):
return "aThisObj"
def getCallableDecl(self):
return "let callable = ObjectValue(unsafe {&*self.parent.callback()});\n";
return "let callable = ObjectValue(unsafe {&*self.parent.callback()});\n"
class CallbackOperationBase(CallbackMethod):
"""
@ -5243,20 +5248,22 @@ class GlobalGenRoots():
(name + 'Derived', 'is_' + name.lower()))]
for protoName in descriptor.prototypeChain[1:-1]:
protoDescriptor = config.getDescriptor(protoName)
delegate = string.Template('''impl ${selfName} for ${baseName} {
delegate = string.Template("""\
impl ${selfName} for ${baseName} {
#[inline]
fn ${fname}(&self) -> bool {
${parentName}Cast::from_actual(self).${fname}()
}
}
''').substitute({'fname': 'is_' + name.lower(),
}\
""").substitute({'fname': 'is_' + name.lower(),
'selfName': name + 'Derived',
'baseName': protoDescriptor.concreteType,
'parentName': protoDescriptor.prototypeChain[-2]})
derived += [CGGeneric(delegate)]
derived += [CGGeneric('\n')]
cast = [CGGeneric(string.Template('''pub trait ${castTraitName} {
cast = [CGGeneric(string.Template("""\
pub trait ${castTraitName} {
#[inline(always)]
fn to_ref<'a, T: ${toBound}+Reflectable>(base: JSRef<'a, T>) -> Option<JSRef<'a, Self>> {
match base.${checkFn}() {
@ -5304,7 +5311,7 @@ class GlobalGenRoots():
unsafe { mem::transmute(derived) }
}
}
''').substitute({'checkFn': 'is_' + name.lower(),
""").substitute({'checkFn': 'is_' + name.lower(),
'castTraitName': name + 'Cast',
'fromBound': name + 'Base',
'toBound': name + 'Derived'})),