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Added example of static inline member variables to #inline varibles (#77)

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* Added example of static inline member variables to #inline varibles
This commit is contained in:
Frede
2020-01-26 20:00:18 +01:00
committed by Anthony Calandra
parent 1c53669d1f
commit 31cc7ac850
2 changed files with 23 additions and 3 deletions
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12
CPP17.md
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@@ -150,6 +150,16 @@ S x2 = S{123}; // mov eax, dword ptr [.L_ZZ4mainE2x2]
// .L_ZZ4mainE2x2: .long 123 // .L_ZZ4mainE2x2: .long 123
``` ```
It can also be used to declare and define a static member variable, such that it does not need to be initialized in the source file.
```c++
struct S {
S() : id(count++) {}
~S() {count--;}
int id;
static inline int count{0}; // declare and initialize count to 0 within the class
};
```
### Nested namespaces ### Nested namespaces
Using the namespace resolution operator to create nested namespace definitions. Using the namespace resolution operator to create nested namespace definitions.
```c++ ```c++
@@ -393,7 +403,7 @@ The new `std::filesystem` library provides a standard way to manipulate files, d
Here, a big file is copied to a temporary path if there is available space: Here, a big file is copied to a temporary path if there is available space:
```c++ ```c++
const auto bigFilePath {"bigFileToCopy"}; const auto bigFilePath {"bigFileToCopy"};
if (std::filesystem::exists(bigFilePath)) { if (std::filesystem::exists(bigFilePath)) {
const auto bigFileSize {std::filesystem::file_size(bigFilePath)}; const auto bigFileSize {std::filesystem::file_size(bigFilePath)};
std::filesystem::path tmpPath {"/tmp"}; std::filesystem::path tmpPath {"/tmp"};
if (std::filesystem::space(tmpPath).available > bigFileSize) { if (std::filesystem::space(tmpPath).available > bigFileSize) {

14
README.md
View File

@@ -435,6 +435,16 @@ S x2 = S{123}; // mov eax, dword ptr [.L_ZZ4mainE2x2]
// .L_ZZ4mainE2x2: .long 123 // .L_ZZ4mainE2x2: .long 123
``` ```
It can also be used to declare and define a static member variable, such that it does not need to be initialized in the source file.
```c++
struct S {
S() : id(count++) {}
~S() {count--;}
int id;
static inline int count{0}; // declare and initialize count to 0 within the class
};
```
### Nested namespaces ### Nested namespaces
Using the namespace resolution operator to create nested namespace definitions. Using the namespace resolution operator to create nested namespace definitions.
```c++ ```c++
@@ -678,7 +688,7 @@ The new `std::filesystem` library provides a standard way to manipulate files, d
Here, a big file is copied to a temporary path if there is available space: Here, a big file is copied to a temporary path if there is available space:
```c++ ```c++
const auto bigFilePath {"bigFileToCopy"}; const auto bigFilePath {"bigFileToCopy"};
if (std::filesystem::exists(bigFilePath)) { if (std::filesystem::exists(bigFilePath)) {
const auto bigFileSize {std::filesystem::file_size(bigFilePath)}; const auto bigFileSize {std::filesystem::file_size(bigFilePath)};
std::filesystem::path tmpPath {"/tmp"}; std::filesystem::path tmpPath {"/tmp"};
if (std::filesystem::space(tmpPath).available > bigFileSize) { if (std::filesystem::space(tmpPath).available > bigFileSize) {
@@ -1624,7 +1634,7 @@ void foo(bool clause) { /* do something... */ }
std::vector<std::thread> threadsVector; std::vector<std::thread> threadsVector;
threadsVector.emplace_back([]() { threadsVector.emplace_back([]() {
// Lambda function that will be invoked // Lambda function that will be invoked
}); });
threadsVector.emplace_back(foo, true); // thread will run foo(true) threadsVector.emplace_back(foo, true); // thread will run foo(true)
for (auto& thread : threadsVector) { for (auto& thread : threadsVector) {