Template meta-programming is a meta-programming technique in which templates are used by a compiler to generate temporary source code, which is merged by the compiler with the rest of the source code and then compiled.
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CRTP object counter to track accidental singleton instantiation
I have used CRTP to implement an object counter for singleton classes. This way I can keep track of accidental attempts to instantiate more than one object. It is a header only class:
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Template integer range
This is a follow-up of an old question by @LokiAstari, modified for the current community challenge. The idea is to provide a compile-time integer range. I applied all the modifications that I ...
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2answers
75 views
Function object passing for a task scheduler
Here is my full implementation of a generic Functor-like class:
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2answers
70 views
Providing const- and non-const overloads of a strstr() implementation
In a question about reimplementing strstr(), I posted an answer. I pointed out a need for const- and non-const versions of the function, and provided ...
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1answer
108 views
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1answer
62 views
std::tuple objects or rvalue references?
I have some small "plugin system" (not sure this is right name). It allow you to store objects (plugins), and then call some methods from each of them. With this approach we have absolutely no ...
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1answer
84 views
Test whether a type T is among the types of a tuple
In SO I asked for a way to do it without variadics. I also provided a typical "normal" implementation with variadics :
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1answer
55 views
Template function specialization with code duplication
I'm working on a libcurl binding for nodejs, and to get info from a curl handler, using curl_easy_getinfo, I've created a template function, the issue, is that the ...
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1answer
102 views
User defined literal for std::integral_constant
I created a user defined literal _c to convert an "integer" literal into an std::integral_constant. Basically, the goal is to ...
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54 views
Template container simulating SQL “select” and “where”
I want to simulate, in C+, the fact that in a form with drop down (or combo boxes), you can filter by selecting items and then projecting on a given set of properties for these item.
In a SQL-like ...
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1answer
115 views
Basic templating engine in F# using F# syntax
I've been working on a rough idea for a templating engine (mostly as a learning project) using the F# syntax. How "correct" is my code in terms of being idiomatic F#? Are there F# features which would ...
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2answers
667 views
Compile time decorator pattern in C++ with templates
I'm doing some high energy physics modelling in C++. I have written code that implements class that score interactions of particles with detector material.
Here is a base class:
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6
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1answer
80 views
Dynamically call lambda based on stream input: Try 3
Based on Dynamically call lambda based on stream input: Try 2
This fixes most of the points pointed out by @Morwenn.
It has been generalized so anybody can call it.
The only extra part needed by the ...
8
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4answers
217 views
n-dimensional Euclidean space calculation templates
I have been working with C++11 code that uses std::vector[] to store coordinates. Most often this code uses 2D or 3D but it occurred to me that it may be generally ...
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2answers
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Dynamically call lambda based on stream input: Try 2
Originally asked here: Dynamically call lambda based on stream input
The following version is based heavily on the answer provided by @iavr though I hope that I have done enough more to mkae it worth ...
7
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1answer
138 views
C++ template range
From a previous question I got an answer that included some template magic (that to be blunt was mind-boggling (as I could not understand it)).
So I have been trying to achieve the same results ...
5
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2answers
667 views
Unique type ID in C++
I need to have an unique ID for any type in C++ for a variant type. Is this code reliable for getting the ID? I don't care to have same ID for same type between multiple runs. Sorry for ...
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2answers
272 views
Very basic tuple implementation
I've been messing with metaprogramming and variadic templates in C++, and I came up with this very primitive implementation of a tuple:
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Clone of Boost Variant
As part of learning C++, with special emphasis on C++11, I wanted to implement the equivalent of Boost's Variant (located here). My code is available at variant.hpp, with the current version given ...
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116 views
C++ class “overload” using variadic templates and wrapped function pointers
I'm using C++11 and I have the following problem (pseudo C++):
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2answers
166 views
Functional composition of member function predicates
In C++11, it is en vogue to use small lambda expressions to produce ad-hoc predicates. However, sometimes it's fun to create predicates in a functional, "point-free" way. That way, no function bodies ...
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CRTP overload-set nightmare [closed]
I'm not sure if this belongs on CodeReview or StackOverflow, but we'll start with it here.
Here is an anonymized and simplified version of some code I have that uses the Curiously Recurring Template ...
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0answers
211 views
Building a good C++11 template library - compile-time checked enum array
The task is to add data or values to members of a given enum class. The compiler should check, if a value for each enum member is available, and not just default construct empty values. It is a tool ...
3
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2answers
111 views
lockbox (a boost-like container)
So I introduced myself to templates in C++11 and I have to say it's really confusing, but also very fascinating. I just need to get my head around what happens at compile time so that I don't wind up ...
3
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1answer
76 views
Should I use an object or type as trait?
Edit: Disclaimer: I am new to templates and traits.
I apologize in advance if this is a bad question.
I am refactoring two similar classes with small differences strewn all over them into one ...
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1answer
1k views
C++ compile-time checked switch 'statement'
In the project I work on there are several places where a switch statement is used on a type enum. (I know, better to use virtual functions or a visitor pattern or something, but sometimes switching ...
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1answer
313 views
Could this deferred execution scheme be any simpler?
I've created this scheme to preserve function calls until all the arguments are available. The stub_op classes will be replaced with classes that implement a ...
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1answer
152 views
Type to instance map
I needed a class where I could store an instance of any type. The goal was an interface as follows:
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1answer
511 views
Review of C++ singleton
Originally posted on Stack Overflow.
So far, I've used this in a few places and it seems solid.
This is what I usually do to make a singleton:
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JSON Serializer
Carrying on from:
Yet another C++ Json Parser
Yet another C++ Json Parser (Recursive)
All the code is available from git hub: ThorsSerializer but only reviewing a small section here.
The idea is ...
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1answer
267 views
How can I improve the design of this serialization mechanism?
I'm working on caching library which is intended to work with all types of values.
Values are represented as instances of value_type: ...
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1answer
336 views
Variadic function with restricted types
I am designing a class which (among other things) acts as a vertex in an undirected graph.
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1answer
340 views
D2.0 mixin and template-heavy code - building a Silverlight clone
I've made a mock version of Silverlight in D2. It is meant to output html but since I don't know HTML yet, it's current output is not valid. HTML is not the reason I'm here though. The goal of my ...
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1answer
497 views
Meta-program to find square numbers
I'm new to template meta-programming and wrote some code to determine if a number is a perfect square. For example, in my program, SQUARE<1>::value and ...
