metaprogramming

When might a dispatch table be as good as method_missing in Ruby?

Are there any situations where a dispatch table, implemented as a hash of lambdas, might be as good, if not better, than over-riding Ruby\'s method_missing?I\'m asking because I used this technique to[详细]

2023-04-13 07:10 分类：问答

Conversion operator template specialization

Here\'s a largely academic exercise in understanding conversion operators, templates and template specializations.The conversion operator template in the following code works for int, float, and doubl[详细]

2023-04-12 18:04 分类：问答

Preventing non-const lvalues from resolving to rvalue reference instead of const lvalue reference

I\'m having trouble overloading a function to take a value either by const reference or, if it is an rvalue, an rvalue reference. The problem is that my non-const lvalues are binding to the rvalue ver[详细]

2023-04-12 11:26 分类：问答

Doesn't Lua have something comparable to Ruby's method_missing?

I seem to recall Lu开发者_如何学运维a has something similar to Ruby\'s method_missing.Or am I remembering incorrectly?The __index and __newindex of a table\'s metatable can be used to the same effect[详细]

2023-04-12 03:11 分类：问答

Getting boolean from true_type/false_type typedef from dependent class in enable_if

I have a class template <typename T> struct Trait { typedef std::false_type IsGood; }; template <>[详细]

2023-04-12 00:34 分类：问答

Generate python code of a class from an python instance of this class

In my code, I generate new python classes at runtime. For some of them, I want to generate the python code, just as if I wrote these classes in a .py file.[详细]

2023-04-11 23:13 分类：问答

ruby - is there a way to add code to run after each method definition

I understand that def is a keyword and can\'t be ove开发者_Python百科rridden. But is there a way to call a method when a method gets registered with a class(passing in the name of the method being cr[详细]

2023-04-11 22:21 分类：问答

Dynamic Method Call within define_method

I\'m rather new to ruby, but am in a sit开发者_如何学编程uation where I have many repetitive methods. In attempting to DRY out my code I came up with something like the following:[详细]

2023-04-10 21:32 分类：问答

Use method in different context, instance_eval adds unwanted argument

I\'m trying to call a method of an object foo as if it was an method of object bar. I tried two approaches:[详细]

2023-04-10 05:01 分类：问答

Is metaprogramming a subset of reflection?

I used to think that metaprogramming involved modifying the program, and (as do some answers to What is reflection and why is it useful? ) that reflection merely consisted of introspection of a progra[详细]

2023-04-10 03:42 分类：问答