ruby​​中某個類方法的已定義超級方法列表

Question

我正在使用一些複雜的class/mixin層次結構的系統。由於分散在許多不同文件上的許多圖層，我想快速查看給定方法的超級調用鏈。

例如

module AAA 
    def to_s 
    "AAA " + super() 
    end 
end 

module BBB 
    def to_s 
    "BBB " + super() 
    end 
end 

class MyArray < Array 
    include AAA 
    include BBB 

    def to_s 
    "MyArray " + super() 
    end 
end 

> MyArray.new.to_s 
=> "MyArray BBB AAA []" 
> method_supers(MyArray,:to_s) 
=> ["MyArray#to_s", "BBB#to_s", "AAA#to_s", "Array#to_s", ...] 

Answer 1

也許這樣的事情？

class A 
    def foo; p :A; end 
end 

module B 
    def foo; p :B; super; end 
end 

module C; end 

class D < A 
    include B, C 
    def foo; p :D; super; end 
end 

p D.ancestors.keep_if { |c| c.instance_methods.include? :foo } # [D, B, A] 

如果這似乎是正確的，你可以相應地修改這個功能：

def Object.super_methods(method) 
    ancestors.keep_if { |c| c.instance_methods.include? method } 
end 

p D.super_methods(:foo) # [D, B, A] 

Answer 2

def method_supers(child_class,method_name) 
    ancestry = child_class.ancestors 

    methods = ancestry.map do |ancestor| 
    begin 
     ancestor.instance_method(method_name) 
    rescue 
     nil 
    end 
    end 

    methods.reject!(&:nil?) 

    methods.map {|m| m.owner.name + "#" + m.name.to_s} 
end