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Questions - const-reference

C++ const-reference loop over a vector containing map

#include <iostream> #include <vector> #include <string> #include <map> #include <unordered_map> #include <any> using namespace std; using MapAny = std::unordered_m...
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Huy Le

c++

vector

reference

auto

const-reference

Votes: 0

Answers: 0

Understanding const reference in assignment when constructing object

Today I see this piece of code and I'm wondering to know what it is exactly doing this const reference in an assignment where a new object is created. (I don't know how to name this kind of assignment...
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cbuchart

c++

c++14

variable-assignment

const-reference

Votes: 0

Answers: 2

Latest Answer

From std::string::c_str's documentation, it returns: a pointer to an array that contains a null-terminated sequence of characters (i.e., a C-string) representing the current value of the string objec...
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Jason

Difference between ordinary parameter, reference parameter and const reference parameter passed by ordinary object and object created temporary

Since I'm a beginner in c++, some questions don't quite understand. This question came across by accident while I was reading C++ primer 5th. I have a Cat class with 3 different constructors(named by...
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黄柏禧

c++

parameters

reference

constants

const-reference

Votes: 0

Answers: 1

Latest Answer

It's pretty simple: ctor 1 receives the argument by copy (pass by value); ctor 2 receives the argument by non-const lvalue reference, so it only supports non-const lvalues. ctor 3 receives argument b...
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digito_evo

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