// method:
internal RubyMethodInfo(RubyMethodBody/*!*/ body, RubyScope/*!*/ declaringScope, RubyModule/*!*/ declaringModule, RubyMemberFlags flags)
: base(flags, declaringModule) {
Assert.NotNull(body, declaringModule);
_body = body;
_declaringScope = declaringScope;
}
// method:
internal RubyMethodInfo(RubyMethodBody /*!*/ body, RubyScope /*!*/ declaringScope, RubyModule /*!*/ declaringModule, RubyMemberFlags flags)
: base(flags, declaringModule)
{
Assert.NotNull(body, declaringModule);
_body = body;
_declaringScope = declaringScope;
}
[Emitted] // MethodDeclaration:
public static object DefineMethod(object targetOrSelf, RubyScope/*!*/ scope, RubyMethodBody/*!*/ body) {
Assert.NotNull(body, scope);
RubyModule instanceOwner, singletonOwner;
RubyMemberFlags instanceFlags, singletonFlags;
bool moduleFunction = false;
if (body.HasTarget) {
if (!RubyUtils.CanCreateSingleton(targetOrSelf)) {
throw RubyExceptions.CreateTypeError("can't define singleton method for literals");
}
instanceOwner = null;
instanceFlags = RubyMemberFlags.Invalid;
singletonOwner = scope.RubyContext.CreateSingletonClass(targetOrSelf);
singletonFlags = RubyMemberFlags.Public;
} else {
var attributesScope = scope.GetMethodAttributesDefinitionScope();
if ((attributesScope.MethodAttributes & RubyMethodAttributes.ModuleFunction) == RubyMethodAttributes.ModuleFunction) {
// Singleton module-function's scope points to the instance method's RubyMemberInfo.
// This affects:
// 1) super call
// Super call is looking for Method.DeclaringModule while searching MRO, which would fail if the singleton module-function
// was in MRO. Since module-function can only be used on module the singleton method could only be on module's singleton.
// Module's singleton is never part of MRO so we are safe.
// 2) trace
// Method call trace reports non-singleton module.
// MRI 1.8: instance method owner is self -> it is possible (via define_method) to define m.f. on a class (bug)
// MRI 1.9: instance method owner GetMethodDefinitionOwner
// MRI allows to define m.f. on classes but then doesn't work correctly with it.
instanceOwner = scope.GetMethodDefinitionOwner();
if (instanceOwner.IsClass) {
throw RubyExceptions.CreateTypeError("A module function cannot be defined on a class.");
}
instanceFlags = RubyMemberFlags.Private;
singletonOwner = instanceOwner.SingletonClass;
singletonFlags = RubyMemberFlags.Public;
moduleFunction = true;
} else {
instanceOwner = scope.GetMethodDefinitionOwner();
instanceFlags = (RubyMemberFlags)RubyUtils.GetSpecialMethodVisibility(attributesScope.Visibility, body.Name);
singletonOwner = null;
singletonFlags = RubyMemberFlags.Invalid;
}
}
RubyMethodInfo instanceMethod = null, singletonMethod = null;
if (instanceOwner != null) {
SetMethod(scope.RubyContext, instanceMethod =
new RubyMethodInfo(body, scope, instanceOwner, instanceFlags)
);
}
if (singletonOwner != null) {
SetMethod(scope.RubyContext, singletonMethod =
new RubyMethodInfo(body, scope, singletonOwner, singletonFlags)
);
}
// the method's scope saves the result => singleton module-function uses instance-method
var method = instanceMethod ?? singletonMethod;
method.DeclaringModule.MethodAdded(body.Name);
if (moduleFunction) {
Debug.Assert(!method.DeclaringModule.IsClass);
method.DeclaringModule.SingletonClass.MethodAdded(body.Name);
}
return null;
}