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Merge branch 'master' of github.com:TartanLlama/optional

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Simon Brand
2018-09-03 09:09:57 +01:00
parent aecb8fe6db 0d449821ca
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@ -8,7 +8,7 @@ MSVC: [![Windows Build Status](https://ci.appveyor.com/api/projects/status/k5x00
For example, instead of writing this code: For example, instead of writing this code:
``` ```c++
std::optional<image> get_cute_cat (const image& img) { std::optional<image> get_cute_cat (const image& img) {
auto cropped = crop_to_cat(img); auto cropped = crop_to_cat(img);
if (!cropped) { if (!cropped) {
@ -31,7 +31,7 @@ std::optional<image> get_cute_cat (const image& img) {
You can do this: You can do this:
``` ```c++
tl::optional<image> get_cute_cat (const image& img) { tl::optional<image> get_cute_cat (const image& img) {
return crop_to_cat(img) return crop_to_cat(img)
.and_then(add_bow_tie) .and_then(add_bow_tie)
@ -68,7 +68,7 @@ The interface is the same as `std::optional`, but the following member functions
In addition to those member functions, optional references are also supported: In addition to those member functions, optional references are also supported:
``` ```c++
int i = 42; int i = 42;
tl::optional<int&> o = i; tl::optional<int&> o = i;
*o == 42; //true *o == 42; //true
@ -79,7 +79,7 @@ i = 12;
Assignment has rebind semantics rather than assign-through semantics: Assignment has rebind semantics rather than assign-through semantics:
``` ```c++
int j = 8; int j = 8;
o = j; o = j;
@ -103,7 +103,7 @@ Tested on:
* g++ 8.0.1 * g++ 8.0.1
* g++ 7.3 * g++ 7.3
* g++ 6.4 * g++ 6.4
* g++ 5.5 * g++ 5.5
* g++ 4.9 * g++ 4.9
* g++ 4.8 * g++ 4.8
- Windows - Windows