All Questions
2,382
questions
0
votes
1
answer
61
views
Get templated struct without knowing initial template arguments
I am looking for a way to get a specified templated struct from the custom Node classes I am building without having to static_cast or dynamic_cast when I get the pointers. What ways can I use to ...
-2
votes
0
answers
80
views
Are there objects for primitive data types? [duplicate]
If the object represents a data type, is the variable for a primitive data type like an integer also an object representing this type, or do objects not represent primitive data types?
// Let's assume ...
0
votes
1
answer
161
views
How to parameter pack pairs of types?
Here's an example usage of a parameter pack:
template <typename... T>
bool foo(A x) {
return (baz<T>(x) || ...);
}
I'd like to do something similar, but with pairs of types. Here's an ...
- 1,183
-2
votes
2
answers
94
views
Custom integer-like datatype with support for static casts without warnings
I'm writing my own little utility library, and I've opted to do something which I don't really see often (and there might be a reason) - I'm trying to implement a 'perfect' wrapper around C++ integer ...
- 69
1
vote
1
answer
87
views
Inherited functions returning self reference with derived type
I am trying to create a system where one base class has a bunch of functions, then derived classes can inherit it and add more functions. However, all of these functions return the this keyword and I ...
0
votes
0
answers
76
views
c++ warning: non-void function does not return a value in all control paths
warning: non-void function does not return a value in all control paths...
I know what it means, because the for loops don't return something when the data is empty.
How should I fix it?
template<...
0
votes
2
answers
68
views
Static variable and type: could there be another simpler way to implement a function that returns the same ID for each user-defined type?
I was working on creating an entity-component system on my own, and in doing this I have gotten help from a lot of YouTube videos, C++ references, recommended books, etc. While I was implementing a ...
0
votes
1
answer
81
views
Compile time map of type string name to types in C++
In C++ is it possible to generate a compile time map of stringified type names to types. I am aware types themselves can't be mapped but could we for example map to template metafunctions which expose ...
1
vote
1
answer
147
views
Calculating numbers that require greater than 16 byte data type in C++
I'm working on a function to calculate Fibonacci numbers and return the lowest value digit of that number in C++. I've found that in C++, the largest data type is __uint128_t, which gives me 16 bytes ...
0
votes
0
answers
36
views
Create Clamped Datatype [duplicate]
I want to create a c++ datatype that will always clamp it's value between 0.0 and 360.0. Other than that, it should behave exactly as a double. I would use it like this:
degree my_num1 = 3.5; //...
- 52
-1
votes
1
answer
105
views
Why is having two default constructors only an error if you construct an object of that type?
Here's an example:
#include <stdio.h>
struct C { ...
- 1,183
0
votes
3
answers
89
views
How to get the class type of an unnamed struct in a typedef inside the unnamed class?
This is a theoritcal question whether it is possible to get the type of the unnamed struct inside its definition.
int main() {
struct {
using ThisType = ???? //what do i put here?
} _;...
- 329
0
votes
2
answers
67
views
The underline type for uint_fast8_t may be wider than a single byte, so the uint_fast8_t b = 0xF0; b<<4; isn't determined across different compilers?
uint_fast8_t is intended to provide the fastest possible 8-bit (or wider) integer type on the target platform, while uint8_t is a fixed 8-bit unsigned integer type.
So the uint_fast8_t b = 0xF0; b<...
- 3,354
1
vote
2
answers
59
views
C++ class template: define a type used in superclass parameterization and value_type definition
I'm writing a small wrapper around iterators and my code ends up looking like this:
template <typename Iterator>
class Class: public Superclass<typename std::remove_reference<Iterator>::...
- 217
1
vote
2
answers
101
views
Similar types (`int16_t` and `short`) produce different behaviors during reference instantiation
I'm running into the following error depending on which type I choose for a variable.
/home/zak/Development/Arduino/generated_examples/ArduinoIoTCloud_Basic/thingProperties.h: In function 'void ...
- 12.5k