mirror of
https://github.com/simonbrunel/qtpromise.git
synced 2024-10-30 15:57:39 +08:00
Enhance the documentation and add markdown lint
- Add npm package.json to make easier maintaining dependencies. - Make markdown files consistent using remark. - Wrap markdown lines to 100 characters. - Better README.md layout and visual. - Enable VuePress landing/home page. - Upgrade to latest VuePress version. - Add link to the new Qt Marketplace.
This commit is contained in:
Simon Brunel
parent
815dc443b9
commit
3c1461b8d0
5
.gitignore
vendored
5
.gitignore
vendored
@ -1,8 +1,8 @@
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_book
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||||
dist
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||||
node_modules
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*.gcno
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*.gcda
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*.info
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||||
*.moc
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||||
*.o
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||||
*.obj
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||||
@ -11,6 +11,3 @@ node_modules
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||||
Makefile*
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||||
moc_*.cpp
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||||
moc_*.h
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||||
coverage.info
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||||
package-lock.json
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||||
target_wrapper.bat
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||||
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||||
5
.remarkrc.yml
Normal file
5
.remarkrc.yml
Normal file
@ -0,0 +1,5 @@
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||||
plugins:
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- frontmatter
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- preset-lint-recommended
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||||
- preset-lint-markdown-style-guide
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- [lint-maximum-line-length, 100]
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23
README.md
23
README.md
@ -1,8 +1,15 @@
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<a href="https://promisesaplus.com/" title="Promises/A+ 1.1"><img src="https://promisesaplus.com/assets/logo-small.png" alt="Promises/A+" align="right"/></a>
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<p align="center">
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<img width="256" src="docs/.vuepress/public/hero.svg?sanitize=true">
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</p>
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# QtPromise
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<p align="center">
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<a href="https://www.qpm.io/packages/com.github.simonbrunel.qtpromise/index.html"><img src="https://img.shields.io/github/release/simonbrunel/qtpromise.svg?style=flat-square&label=qpm&colorB=4CAF50&maxAge=600" alt="Install"></a>
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<a href="https://travis-ci.org/simonbrunel/qtpromise"><img src="https://img.shields.io/travis/simonbrunel/qtpromise/master.svg?style=flat-square&maxAge=600" alt="Builds"></a>
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<a href="https://codecov.io/gh/simonbrunel/qtpromise"><img src="https://img.shields.io/codecov/c/github/simonbrunel/qtpromise.svg?style=flat-square&maxAge=600" alt="Coverage"></a>
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<a href="https://marketplace.qt.io/products/qtpromise"><img src="https://img.shields.io/static/v1?style=flat-square&label=Qt&message=Marketplace&colorB=40cd52&maxAge=600" alt="Marketplace"></a>
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</p>
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[](https://www.qpm.io/packages/com.github.simonbrunel.qtpromise/index.html) [](https://travis-ci.org/simonbrunel/qtpromise) [](https://codecov.io/gh/simonbrunel/qtpromise)
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## Overview
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[Promises/A+](https://promisesaplus.com/) implementation for [Qt/C++](https://www.qt.io/).
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@ -10,11 +17,11 @@ Requires [Qt 5.6](https://www.qt.io/download/) (or later) with [C++11 support en
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## Documentation
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* [Getting Started](https://qtpromise.netlify.com/qtpromise/getting-started.html)
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* [Qt Concurrent](https://qtpromise.netlify.com/qtpromise/qtconcurrent.html)
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* [Qt Signals](https://qtpromise.netlify.com/qtpromise/qtsignals.html)
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* [Thread-Safety](https://qtpromise.netlify.com/qtpromise/thread-safety.html)
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* [API Reference](https://qtpromise.netlify.com/qtpromise/api-reference.html)
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- [Getting Started](https://qtpromise.netlify.com/qtpromise/getting-started.html)
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- [Qt Concurrent](https://qtpromise.netlify.com/qtpromise/qtconcurrent.html)
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- [Qt Signals](https://qtpromise.netlify.com/qtpromise/qtsignals.html)
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- [Thread-Safety](https://qtpromise.netlify.com/qtpromise/thread-safety.html)
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- [API Reference](https://qtpromise.netlify.com/qtpromise/api-reference.html)
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## License
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@ -1,6 +1,7 @@
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module.exports = {
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title: 'QtPromise',
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description: 'Promises/A+ implementation for Qt/C++',
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dest: 'dist/docs',
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ga: 'UA-113899811-1',
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head: [
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['link', { rel: 'icon', href: `/favicon.png` }],
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@ -8,61 +9,67 @@ module.exports = {
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themeConfig: {
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repo: 'simonbrunel/qtpromise',
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lastUpdated: 'Last Updated',
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smoothScroll: true,
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editLinks: true,
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docsDir: 'docs',
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algolia: {
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apiKey: '0e6e9cccb8c2c360a5543e28c4e31cb8',
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indexName: 'qtpromise'
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},
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nav: [
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{ text: 'Home', link: '/' },
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{ text: 'Guide', link: '/qtpromise/getting-started' },
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{ text: 'API Reference', link: '/qtpromise/api-reference' },
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],
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sidebar: [
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'qtpromise/getting-started',
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'qtpromise/qtconcurrent',
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'qtpromise/qtsignals',
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'qtpromise/thread-safety',
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'qtpromise/api-reference',
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'/qtpromise/getting-started',
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'/qtpromise/qtconcurrent',
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'/qtpromise/qtsignals',
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'/qtpromise/thread-safety',
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'/qtpromise/api-reference',
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{
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title: 'QPromise',
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children: [
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'qtpromise/qpromise/constructor',
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'qtpromise/qpromise/delay',
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'qtpromise/qpromise/each',
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'qtpromise/qpromise/fail',
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'qtpromise/qpromise/filter',
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'qtpromise/qpromise/finally',
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'qtpromise/qpromise/isfulfilled',
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'qtpromise/qpromise/ispending',
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'qtpromise/qpromise/isrejected',
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'qtpromise/qpromise/map',
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'qtpromise/qpromise/reduce',
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'qtpromise/qpromise/tap',
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'qtpromise/qpromise/tapfail',
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'qtpromise/qpromise/then',
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'qtpromise/qpromise/timeout',
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'qtpromise/qpromise/wait',
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'qtpromise/qpromise/reject.md',
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'qtpromise/qpromise/resolve.md'
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'/qtpromise/qpromise/constructor',
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'/qtpromise/qpromise/delay',
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'/qtpromise/qpromise/each',
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'/qtpromise/qpromise/fail',
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'/qtpromise/qpromise/filter',
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'/qtpromise/qpromise/finally',
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'/qtpromise/qpromise/isfulfilled',
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'/qtpromise/qpromise/ispending',
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'/qtpromise/qpromise/isrejected',
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'/qtpromise/qpromise/map',
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'/qtpromise/qpromise/reduce',
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'/qtpromise/qpromise/tap',
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'/qtpromise/qpromise/tapfail',
|
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'/qtpromise/qpromise/then',
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'/qtpromise/qpromise/timeout',
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'/qtpromise/qpromise/wait',
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'/qtpromise/qpromise/reject.md',
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'/qtpromise/qpromise/resolve.md'
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]
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},
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{
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title: 'Helpers',
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children: [
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'qtpromise/helpers/all',
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'qtpromise/helpers/attempt',
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'qtpromise/helpers/connect',
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'qtpromise/helpers/each',
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'qtpromise/helpers/filter',
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'qtpromise/helpers/map',
|
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'qtpromise/helpers/reduce',
|
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'qtpromise/helpers/resolve'
|
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'/qtpromise/helpers/all',
|
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'/qtpromise/helpers/attempt',
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'/qtpromise/helpers/connect',
|
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'/qtpromise/helpers/each',
|
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'/qtpromise/helpers/filter',
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'/qtpromise/helpers/map',
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'/qtpromise/helpers/reduce',
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'/qtpromise/helpers/resolve'
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]
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},
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{
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title: 'Exceptions',
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children: [
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'qtpromise/exceptions/canceled',
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'qtpromise/exceptions/context',
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'qtpromise/exceptions/timeout',
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'qtpromise/exceptions/undefined'
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'/qtpromise/exceptions/canceled',
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'/qtpromise/exceptions/context',
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'/qtpromise/exceptions/timeout',
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'/qtpromise/exceptions/undefined'
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]
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}
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]
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47
docs/.vuepress/public/hero.svg
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47
docs/.vuepress/public/hero.svg
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<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
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<svg version="1.0" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
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width="512px" height="512px" viewBox="0 0 512 512" enable-background="new 0 0 512 512" xml:space="preserve">
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After Width: | Height: | Size: 4.6 KiB |
@ -1,4 +0,0 @@
|
||||
@import 'override.styl'
|
||||
|
||||
.content a code
|
||||
color: $accentColor
|
||||
37
docs/.vuepress/styles/index.styl
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37
docs/.vuepress/styles/index.styl
Normal file
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|
||||
@import 'palette.styl'
|
||||
|
||||
a
|
||||
svg.icon.outbound
|
||||
margin-bottom -2px
|
||||
margin-left 2px
|
||||
|
||||
img + svg.icon.outbound
|
||||
display none
|
||||
|
||||
sup
|
||||
font-size 0.75em !important
|
||||
|
||||
.home .hero
|
||||
img
|
||||
margin 1.5rem auto !important
|
||||
.description
|
||||
display none !important
|
||||
#main-title
|
||||
display none !important
|
||||
|
||||
.content a code
|
||||
color $accentColor
|
||||
|
||||
.navbar
|
||||
-webkit-box-shadow 0 4px 4px -4px rgba(0,0,0,0.1)
|
||||
-moz-box-shadow 0 4px 4px -4px rgba(0,0,0,0.1)
|
||||
box-shadow 0 4px 4px -4px rgba(0,0,0,0.1)
|
||||
|
||||
.logo
|
||||
margin-right: 0.5rem;
|
||||
|
||||
.site-name
|
||||
font-size 1.25rem
|
||||
|
||||
.repo-link
|
||||
margin-left 1rem
|
||||
@ -1,9 +1,31 @@
|
||||
<a href="https://promisesaplus.com/" title="Promises/A+ 1.1"><img src="https://promisesaplus.com/assets/logo-small.png" alt="Promises/A+" align="right"/></a>
|
||||
---
|
||||
home: true
|
||||
heroImage: /hero.svg
|
||||
actionLink: /qtpromise/getting-started.md
|
||||
footer: MIT Licensed | Copyright © 2019 Simon Brunel
|
||||
---
|
||||
|
||||
<p align="center">
|
||||
<a href="https://www.qpm.io/packages/com.github.simonbrunel.qtpromise/index.html"><img src="https://img.shields.io/github/release/simonbrunel/qtpromise.svg?style=flat-square&label=qpm&colorB=4CAF50&maxAge=600" alt="Install"></a>
|
||||
<a href="https://travis-ci.org/simonbrunel/qtpromise"><img src="https://img.shields.io/travis/simonbrunel/qtpromise/master.svg?style=flat-square&maxAge=600" alt="Builds"></a>
|
||||
<a href="https://codecov.io/gh/simonbrunel/qtpromise"><img src="https://img.shields.io/codecov/c/github/simonbrunel/qtpromise.svg?style=flat-square&maxAge=600" alt="Coverage"></a>
|
||||
<a href="https://marketplace.qt.io/products/qtpromise"><img src="https://img.shields.io/static/v1?style=flat-square&label=Qt&message=Marketplace&colorB=40cd52&maxAge=600" alt="Marketplace"></a>
|
||||
</p>
|
||||
|
||||
## Overview
|
||||
|
||||
# QtPromise
|
||||
[Promises/A+](https://promisesaplus.com/) implementation for [Qt/C++](https://www.qt.io/).
|
||||
|
||||
Requires [Qt 5.6](https://www.qt.io/download/) (or later) with [C++11 support enabled](https://wiki.qt.io/How_to_use_C++11_in_your_Qt_Projects).
|
||||
|
||||
## Documentation
|
||||
|
||||
- [Getting Started](/qtpromise/getting-started.md)
|
||||
- [Qt Concurrent](/qtpromise/qtconcurrent.md)
|
||||
- [Qt Signals](/qtpromise/qtsignals.md)
|
||||
- [Thread-Safety](/qtpromise/thread-safety.md)
|
||||
- [API Reference](/qtpromise/api-reference.md)
|
||||
|
||||
## License
|
||||
|
||||
QtPromise is available under the [MIT license](https://github.com/simonbrunel/qtpromise/blob/master/LICENSE).
|
||||
|
||||
@ -2,48 +2,48 @@
|
||||
|
||||
## Functions
|
||||
|
||||
* [`QPromise<T>::QPromise`](qpromise/constructor.md)
|
||||
* [`QPromise<T>::delay`](qpromise/delay.md)
|
||||
* [`QPromise<T>::each`](qpromise/each.md)
|
||||
* [`QPromise<T>::fail`](qpromise/fail.md)
|
||||
* [`QPromise<T>::filter`](qpromise/filter.md)
|
||||
* [`QPromise<T>::finally`](qpromise/finally.md)
|
||||
* [`QPromise<T>::isFulfilled`](qpromise/isfulfilled.md)
|
||||
* [`QPromise<T>::isPending`](qpromise/ispending.md)
|
||||
* [`QPromise<T>::isRejected`](qpromise/isrejected.md)
|
||||
* [`QPromise<T>::map`](qpromise/map.md)
|
||||
* [`QPromise<T>::reduce`](qpromise/reduce.md)
|
||||
* [`QPromise<T>::tap`](qpromise/tap.md)
|
||||
* [`QPromise<T>::tapFail`](qpromise/tapfail.md)
|
||||
* [`QPromise<T>::then`](qpromise/then.md)
|
||||
* [`QPromise<T>::timeout`](qpromise/timeout.md)
|
||||
* [`QPromise<T>::wait`](qpromise/wait.md)
|
||||
- [`QPromise<T>::QPromise`](qpromise/constructor.md)
|
||||
- [`QPromise<T>::delay`](qpromise/delay.md)
|
||||
- [`QPromise<T>::each`](qpromise/each.md)
|
||||
- [`QPromise<T>::fail`](qpromise/fail.md)
|
||||
- [`QPromise<T>::filter`](qpromise/filter.md)
|
||||
- [`QPromise<T>::finally`](qpromise/finally.md)
|
||||
- [`QPromise<T>::isFulfilled`](qpromise/isfulfilled.md)
|
||||
- [`QPromise<T>::isPending`](qpromise/ispending.md)
|
||||
- [`QPromise<T>::isRejected`](qpromise/isrejected.md)
|
||||
- [`QPromise<T>::map`](qpromise/map.md)
|
||||
- [`QPromise<T>::reduce`](qpromise/reduce.md)
|
||||
- [`QPromise<T>::tap`](qpromise/tap.md)
|
||||
- [`QPromise<T>::tapFail`](qpromise/tapfail.md)
|
||||
- [`QPromise<T>::then`](qpromise/then.md)
|
||||
- [`QPromise<T>::timeout`](qpromise/timeout.md)
|
||||
- [`QPromise<T>::wait`](qpromise/wait.md)
|
||||
|
||||
## Static Functions
|
||||
|
||||
* [`[static] QPromise<T>::reject`](qpromise/reject.md)
|
||||
* [`[static] QPromise<T>::resolve`](qpromise/resolve.md)
|
||||
- [`(static) QPromise<T>::reject`](qpromise/reject.md)
|
||||
- [`(static) QPromise<T>::resolve`](qpromise/resolve.md)
|
||||
|
||||
## Helpers
|
||||
|
||||
* [`QtPromise::all`](helpers/all.md)
|
||||
* [`QtPromise::attempt`](helpers/attempt.md)
|
||||
* [`QtPromise::connect`](helpers/connect.md)
|
||||
* [`QtPromise::each`](helpers/each.md)
|
||||
* [`QtPromise::filter`](helpers/filter.md)
|
||||
* [`QtPromise::map`](helpers/map.md)
|
||||
* [`QtPromise::reduce`](helpers/reduce.md)
|
||||
* [`QtPromise::resolve`](helpers/resolve.md)
|
||||
- [`QtPromise::all`](helpers/all.md)
|
||||
- [`QtPromise::attempt`](helpers/attempt.md)
|
||||
- [`QtPromise::connect`](helpers/connect.md)
|
||||
- [`QtPromise::each`](helpers/each.md)
|
||||
- [`QtPromise::filter`](helpers/filter.md)
|
||||
- [`QtPromise::map`](helpers/map.md)
|
||||
- [`QtPromise::reduce`](helpers/reduce.md)
|
||||
- [`QtPromise::resolve`](helpers/resolve.md)
|
||||
|
||||
## Exceptions
|
||||
|
||||
* [`QPromiseCanceledException`](exceptions/canceled.md)
|
||||
* [`QPromiseContextException`](exceptions/context.md)
|
||||
* [`QPromiseTimeoutException`](exceptions/timeout.md)
|
||||
* [`QPromiseUndefinedException`](exceptions/undefined.md)
|
||||
- [`QPromiseCanceledException`](exceptions/canceled.md)
|
||||
- [`QPromiseContextException`](exceptions/context.md)
|
||||
- [`QPromiseTimeoutException`](exceptions/timeout.md)
|
||||
- [`QPromiseUndefinedException`](exceptions/undefined.md)
|
||||
|
||||
## Deprecations
|
||||
|
||||
* `[static] QPromise<T>::all`: use [`QtPromise::all`](helpers/all.md) instead (since 0.5.0)
|
||||
* `QtPromise::qPromise`: use [`QtPromise::resolve`](helpers/resolve.md) instead (since 0.5.0)
|
||||
* `QtPromise::qPromiseAll`: use [`QtPromise::all`](helpers/all.md) instead (since 0.5.0)
|
||||
- `(static) QPromise<T>::all`: use [`QtPromise::all`](helpers/all.md) instead (since 0.5.0)
|
||||
- `QtPromise::qPromise`: use [`QtPromise::resolve`](helpers/resolve.md) instead (since 0.5.0)
|
||||
- `QtPromise::qPromiseAll`: use [`QtPromise::all`](helpers/all.md) instead (since 0.5.0)
|
||||
|
||||
@ -1,12 +1,9 @@
|
||||
---
|
||||
title: QPromiseCanceledException
|
||||
---
|
||||
|
||||
# QPromiseCanceledException
|
||||
|
||||
*Since: 0.1.0*
|
||||
|
||||
This exception is thrown for promise created from a [`QFuture`](../qtconcurrent.md) which has been canceled (e.g. using [`QFuture::cancel()`](http://doc.qt.io/qt-5/qfuture.html#cancel)), for example:
|
||||
This exception is thrown for promise created from a [`QFuture`](../qtconcurrent.md) which has been
|
||||
canceled (e.g. using [`QFuture::cancel()`](http://doc.qt.io/qt-5/qfuture.html#cancel)), for example:
|
||||
|
||||
```cpp
|
||||
auto output = QtPromise::resolve(future)
|
||||
|
||||
@ -1,12 +1,9 @@
|
||||
---
|
||||
title: QPromiseContextException
|
||||
---
|
||||
|
||||
# QPromiseContextException
|
||||
|
||||
*Since: 0.5.0*
|
||||
|
||||
When a promise is created using [`QtPromise::connect()`](../helpers/connect.md), this exception is thrown when the `sender` object is destroyed, for example:
|
||||
When a promise is created using [`QtPromise::connect()`](../helpers/connect.md), this exception is
|
||||
thrown when the `sender` object is destroyed, for example:
|
||||
|
||||
```cpp
|
||||
auto promise = QtPromise::connect(sender, &Object::finished, &Object::error);
|
||||
|
||||
@ -1,12 +1,9 @@
|
||||
---
|
||||
title: QPromiseTimeoutException
|
||||
---
|
||||
|
||||
# QPromiseTimeoutException
|
||||
|
||||
*Since: 0.2.0*
|
||||
|
||||
This is the default exception thrown when reaching the time limit when using the [`QPromise::timeout()`](../qpromise/timeout.md) method, for example:
|
||||
This is the default exception thrown when reaching the time limit when using the
|
||||
[`QPromise::timeout()`](../qpromise/timeout.md) method, for example:
|
||||
|
||||
```cpp
|
||||
QPromise<int> input = {...}
|
||||
|
||||
@ -1,7 +1,3 @@
|
||||
---
|
||||
title: QPromiseUndefinedException
|
||||
---
|
||||
|
||||
# QPromiseUndefinedException
|
||||
|
||||
*Since: 0.5.0*
|
||||
|
||||
@ -2,11 +2,14 @@
|
||||
|
||||
## Installation
|
||||
|
||||
QtPromise is a [header-only](https://en.wikipedia.org/wiki/Header-only) library, simply download the [latest release](https://github.com/simonbrunel/qtpromise/releases/latest) (or [`git submodule`](https://git-scm.com/docs/git-submodule)) and include `qtpromise.pri` from your project `.pro`.
|
||||
QtPromise is a [header-only](https://en.wikipedia.org/wiki/Header-only) library, simply download the
|
||||
[latest release](https://github.com/simonbrunel/qtpromise/releases/latest) (or [`git submodule`](https://git-scm.com/docs/git-submodule))
|
||||
and include `qtpromise.pri` from your project `.pro`.
|
||||
|
||||
### qpm
|
||||
|
||||
Alternatively and **only** if your project relies on [qpm](https://www.qpm.io/), you can install QtPromise as follow:
|
||||
Alternatively and **only** if your project relies on [qpm](https://www.qpm.io/), you can install
|
||||
QtPromise as follow:
|
||||
|
||||
```bash
|
||||
qpm install com.github.simonbrunel.qtpromise
|
||||
@ -28,7 +31,8 @@ Let's first make the code more readable by using the library namespace:
|
||||
using namespace QtPromise;
|
||||
```
|
||||
|
||||
This `download` function creates a [promise from callbacks](qpromise/constructor.md) which will be resolved when the network request is finished:
|
||||
This `download` function creates a [promise from callbacks](qpromise/constructor.md) which will be
|
||||
resolved when the network request is finished:
|
||||
|
||||
```cpp
|
||||
QPromise<QByteArray> download(const QUrl& url)
|
||||
@ -71,6 +75,7 @@ QPromise<Entries> uncompress(const QByteArray& data)
|
||||
```
|
||||
|
||||
It's then easy to chain the whole asynchronous process using promises:
|
||||
|
||||
- initiate the promise chain by downloading a specific URL,
|
||||
- [`then`](qpromise/then.md) *and only if download succeeded*, uncompress received data,
|
||||
- [`then`](qpromise/then.md) validate and process the uncompressed entries,
|
||||
|
||||
@ -6,14 +6,18 @@ title: all
|
||||
|
||||
*Since: 0.5.0*
|
||||
|
||||
```
|
||||
```cpp
|
||||
QtPromise::all(Sequence<QPromise<T>> promises) -> QPromise<QVector<T>>
|
||||
QtPromise::all(Sequence<QPromise<void>> promises) -> QPromise<void>
|
||||
```
|
||||
|
||||
Returns a `QPromise<QVector<T>>` (or `QPromise<void>`) that fulfills when **all** `promises` of (the same) type `T` have been fulfilled. The `output` value is a vector containing all the values of `promises`, in the same order, i.e., at the respective positions to the original sequence, regardless of completion order.
|
||||
Returns a `QPromise<QVector<T>>` (or `QPromise<void>`) that fulfills when **all** `promises` of
|
||||
(the same) type `T` have been fulfilled. The `output` value is a vector containing all the values
|
||||
of `promises`, in the same order, i.e., at the respective positions to the original sequence,
|
||||
regardless of completion order.
|
||||
|
||||
If any of the given `promises` fail, `output` immediately rejects with the error of the promise that rejected, whether or not the other promises are resolved.
|
||||
If any of the given `promises` fail, `output` immediately rejects with the error of the promise that
|
||||
rejected, whether or not the other promises are resolved.
|
||||
|
||||
`Sequence` is any STL compatible container (eg. `QVector`, `QList`, `std::vector`, etc.)
|
||||
|
||||
|
||||
@ -13,9 +13,14 @@ QtPromise::attempt(Functor functor, Args...) -> QPromise<R>
|
||||
// - Functor: Function(Args...) -> R | QPromise<R>
|
||||
```
|
||||
|
||||
Calls `functor` immediately and returns a promise fulfilled with the value returned by `functor`. Any synchronous exceptions will be turned into rejections on the returned promise. This is a convenient method that can be used instead of handling both synchronous and asynchronous exception flows.
|
||||
Calls `functor` immediately and returns a promise fulfilled with the value returned by `functor`.
|
||||
Any synchronous exceptions will be turned into rejections on the returned promise. This is a
|
||||
convenient method that can be used instead of handling both synchronous and asynchronous exception
|
||||
flows.
|
||||
|
||||
The type `R` of the `output` promise depends on the type returned by the `functor` function. If `functor` returns a promise (or `QFuture`), the `output` promise is delayed and will be resolved by the returned promise.
|
||||
The type `R` of the `output` promise depends on the type returned by the `functor` function. If
|
||||
`functor` returns a promise (or `QFuture`), the `output` promise is delayed and will be resolved
|
||||
by the returned promise.
|
||||
|
||||
```cpp
|
||||
QPromise<QByteArray> download(const QUrl& url);
|
||||
|
||||
@ -12,11 +12,16 @@ title: connect
|
||||
(3) QtPromise::connect(QObject* sender, Signal(T) resolver, QObject* sender2, Signal(R) rejecter) -> QPromise<T>
|
||||
```
|
||||
|
||||
Creates a `QPromise<T>` that will be fulfilled with the `resolver` signal's first argument, or a `QPromise<void>` if `resolver` doesn't provide any argument.
|
||||
Creates a `QPromise<T>` that will be fulfilled with the `resolver` signal's first argument, or a
|
||||
`QPromise<void>` if `resolver` doesn't provide any argument.
|
||||
|
||||
The second `(2)` and third `(3)` variants of this method will reject the `output` promise when the `rejecter` signal is emitted. The rejection reason is the value of the `rejecter` signal's first argument or [`QPromiseUndefinedException`](../exceptions/undefined) if `rejected` doesn't provide any argument.
|
||||
The second `(2)` and third `(3)` variants of this method will reject the `output` promise when the
|
||||
`rejecter` signal is emitted. The rejection reason is the value of the `rejecter` signal's first
|
||||
argument or [`QPromiseUndefinedException`](../exceptions/undefined) if `rejected` doesn't provide
|
||||
any argument.
|
||||
|
||||
Additionally, the `output` promise will be automatically rejected with [`QPromiseContextException`](../exceptions/context.md) if `sender` is destroyed before the promise is resolved (that doesn't apply to `sender2`).
|
||||
Additionally, the `output` promise will be automatically rejected with [`QPromiseContextException`](../exceptions/context.md)
|
||||
if `sender` is destroyed before the promise is resolved (that doesn't apply to `sender2`).
|
||||
|
||||
```cpp
|
||||
class Sender : public QObject
|
||||
|
||||
@ -14,9 +14,12 @@ QtPromise::each(Sequence<T> values, Functor functor) -> QPromise<Sequence<T>>
|
||||
// - Functor: Function(T value, int index) -> void | QPromise<void>
|
||||
```
|
||||
|
||||
Calls the given `functor` on each element in `values` then resolves to the original sequence unmodified. If `functor` throws, `output` is rejected with the new exception.
|
||||
Calls the given `functor` on each element in `values` then resolves to the original sequence
|
||||
unmodified. If `functor` throws, `output` is rejected with the new exception.
|
||||
|
||||
If `functor` returns a promise (or `QFuture`), the `output` promise is delayed until all the promises are resolved. If any of the promises fail, `output` immediately rejects with the error of the promise that rejected, whether or not the other promises are resolved.
|
||||
If `functor` returns a promise (or `QFuture`), the `output` promise is delayed until all the
|
||||
promises are resolved. If any of the promises fail, `output` immediately rejects with the error
|
||||
of the promise that rejected, whether or not the other promises are resolved.
|
||||
|
||||
```cpp
|
||||
auto output = QtPromise::each(QVector<QUrl>{
|
||||
|
||||
@ -14,9 +14,14 @@ QtPromise::filter(Sequence<T> values, Filterer filterer) -> QPromise<Sequence<T>
|
||||
// - Filterer: Function(T value, int index) -> bool
|
||||
```
|
||||
|
||||
Iterates over `values` and [filters the sequence](https://en.wikipedia.org/wiki/Filter_%28higher-order_function%29) to another using the given `filterer` function. If `filterer` returns `true`, a copy of the item is put in the `output` sequence, otherwise, the item will not appear in `output`. If `filterer` throws, `output` is rejected with the new exception.
|
||||
Iterates over `values` and [filters the sequence](https://en.wikipedia.org/wiki/Filter_%28higher-order_function%29)
|
||||
to another using the given `filterer` function. If `filterer` returns `true`, a copy of the item
|
||||
is put in the `output` sequence, otherwise, the item will not appear in `output`. If `filterer`
|
||||
throws, `output` is rejected with the new exception.
|
||||
|
||||
If `filterer` returns a promise (or `QFuture`), the `output` promise is delayed until all the promises are resolved. If any of the promises fail, `output` immediately rejects with the error of the promise that rejected, whether or not the other promises are resolved.
|
||||
If `filterer` returns a promise (or `QFuture`), the `output` promise is delayed until all the
|
||||
promises are resolved. If any of the promises fail, `output` immediately rejects with the error
|
||||
of the promise that rejected, whether or not the other promises are resolved.
|
||||
|
||||
```cpp
|
||||
auto output = QtPromise::filter(QVector{
|
||||
@ -40,7 +45,8 @@ output.then([](const QVector<QUrl>& res) {
|
||||
```
|
||||
|
||||
::: tip NOTE
|
||||
The order of the output sequence values is guarantee to be the same as the original sequence, regardless of completion order of the promises returned by `filterer`.
|
||||
The order of the output sequence values is guarantee to be the same as the original sequence,
|
||||
regardless of completion order of the promises returned by `filterer`.
|
||||
:::
|
||||
|
||||
See also: [`QPromise<T>::filter`](../qpromise/filter.md)
|
||||
|
||||
@ -14,9 +14,13 @@ QtPromise::map(Sequence<T> values, Mapper mapper) -> QPromise<QVector<R>>
|
||||
// - Mapper: Function(T value, int index) -> R | QPromise<R>
|
||||
```
|
||||
|
||||
Iterates over `values` and [maps the sequence](https://en.wikipedia.org/wiki/Map_%28higher-order_function%29) to another using the given `mapper` function. The type returned by `mapper` determines the type of the `output` promise. If `mapper` throws, `output` is rejected with the new exception.
|
||||
Iterates over `values` and [maps the sequence](https://en.wikipedia.org/wiki/Map_%28higher-order_function%29)
|
||||
to another using the given `mapper` function. The type returned by `mapper` determines the type of
|
||||
the `output` promise. If `mapper` throws, `output` is rejected with the new exception.
|
||||
|
||||
If `mapper` returns a promise (or `QFuture`), the `output` promise is delayed until all the promises are resolved. If any of the promises fails, `output` immediately rejects with the error of the promise that rejected, whether or not the other promises are resolved.
|
||||
If `mapper` returns a promise (or `QFuture`), the `output` promise is delayed until all the promises
|
||||
are resolved. If any of the promises fails, `output` immediately rejects with the error of the
|
||||
promise that rejected, whether or not the other promises are resolved.
|
||||
|
||||
```cpp
|
||||
auto output = QtPromise::map(QVector{
|
||||
@ -40,7 +44,8 @@ output.then([](const QVector<QByteArray>& res) {
|
||||
```
|
||||
|
||||
::: tip NOTE
|
||||
The order of the output sequence values is guarantee to be the same as the original sequence, regardless of completion order of the promises returned by `mapper`.
|
||||
The order of the output sequence values is guarantee to be the same as the original sequence,
|
||||
regardless of completion order of the promises returned by `mapper`.
|
||||
:::
|
||||
|
||||
See also: [`QPromise<T>::map`](../qpromise/map.md)
|
||||
|
||||
@ -15,9 +15,15 @@ QPromise::reduce(Sequence<T|QPromise<T>> values, Reducer reducer, R|QPromise<R>
|
||||
// - Reducer: Function(T|R accumulator, T item, int index) -> R|QPromise<R>
|
||||
```
|
||||
|
||||
Iterates over `values` and [reduces the sequence to a single value](https://en.wikipedia.org/wiki/Fold_%28higher-order_function%29) using the given `reducer` function and an optional `initialValue`. The type returned by `reducer` determines the type of the `output` promise. If `reducer` throws, `output` is rejected with the new exception.
|
||||
Iterates over `values` and [reduces the sequence to a single value](https://en.wikipedia.org/wiki/Fold_%28higher-order_function%29)
|
||||
using the given `reducer` function and an optional `initialValue`. The type returned by `reducer`
|
||||
determines the type of the `output` promise. If `reducer` throws, `output` is rejected with the
|
||||
new exception.
|
||||
|
||||
If `reducer` returns a promise (or `QFuture`), then the result of the promise is awaited, before continuing with next iteration. If any promise in the `values` sequence is rejected or a promise returned by the `reducer` function is rejected, `output` immediately rejects with the error of the promise that rejected.
|
||||
If `reducer` returns a promise (or `QFuture`), then the result of the promise is awaited, before
|
||||
continuing with next iteration. If any promise in the `values` sequence is rejected or a promise
|
||||
returned by the `reducer` function is rejected, `output` immediately rejects with the error of
|
||||
the promise that rejected.
|
||||
|
||||
```cpp
|
||||
// Concatenate the content of the given files, read asynchronously
|
||||
@ -42,7 +48,8 @@ output.then([](const QString& res) {
|
||||
```
|
||||
|
||||
::: warning IMPORTANT
|
||||
The first time `reducer` is called, if no `initialValue` is provided, `accumulator` will be equal to the first value in the sequence, and `currentValue` to the second one (thus index will be `1`).
|
||||
The first time `reducer` is called, if no `initialValue` is provided, `accumulator` will be equal
|
||||
to the first value in the sequence, and `currentValue` to the second one (thus index will be `1`).
|
||||
:::
|
||||
|
||||
See also: [`QPromise<T>::reduce`](../qpromise/reduce.md)
|
||||
|
||||
@ -6,11 +6,12 @@ title: resolve
|
||||
|
||||
*Since: 0.5.0*
|
||||
|
||||
```
|
||||
```cpp
|
||||
QtPromise::resolve(T value) -> QPromise<R>
|
||||
```
|
||||
|
||||
Similar to the [`QPromise<T>::resolve`](../qpromise/resolve.md) static method, creates a promise resolved from a given `value` but without the extra typing:
|
||||
Similar to the [`QPromise<T>::resolve`](../qpromise/resolve.md) static method, creates a promise
|
||||
resolved from a given `value` but without the extra typing:
|
||||
|
||||
```cpp
|
||||
auto promise = QtPromise::resolve(); // QPromise<void>
|
||||
@ -18,4 +19,5 @@ auto promise = QtPromise::resolve(42); // QPromise<int>
|
||||
auto promise = QtPromise::resolve(QString("foo")); // QPromise<QString>
|
||||
```
|
||||
|
||||
This method also allows to convert `QFuture<T>` to `QPromise<T>`, delayed until the `QFuture` is finished ([read more](../qtconcurrent.md#convert)).
|
||||
This method also allows to convert `QFuture<T>` to `QPromise<T>`, delayed until the `QFuture` is
|
||||
finished ([read more](../qtconcurrent.md#convert)).
|
||||
|
||||
@ -1,34 +0,0 @@
|
||||
---
|
||||
title: ::all [static]
|
||||
---
|
||||
|
||||
# QPromise::all [static]
|
||||
|
||||
*Since: 0.1.0*
|
||||
|
||||
```
|
||||
[static] QPromise<T>::all(Sequence<QPromise<T>> promises) -> QPromise<QVector<T>>
|
||||
```
|
||||
|
||||
Returns a `QPromise<QVector<T>>` that fulfills when **all** `promises` of (the same) type `T` have been fulfilled. The `output` value is a vector containing all the values of `promises`, in the same order, i.e., at the respective positions to the original sequence, regardless of completion order.
|
||||
|
||||
If any of the given `promises` fail, `output` immediately rejects with the error of the promise that rejected, whether or not the other promises are resolved.
|
||||
|
||||
`Sequence` is any STL compatible container (eg. `QVector`, `QList`, `std::vector`, etc.)
|
||||
|
||||
```cpp
|
||||
QVector<QPromise<QByteArray> > promises{
|
||||
download(QUrl("http://a...")),
|
||||
download(QUrl("http://b...")),
|
||||
download(QUrl("http://c..."))
|
||||
};
|
||||
|
||||
auto output = QPromise<QByteArray>::all(promises);
|
||||
|
||||
// output type: QPromise<QVector<QByteArray>>
|
||||
output.then([](const QVector<QByteArray>& res) {
|
||||
// {...}
|
||||
});
|
||||
```
|
||||
|
||||
See also: [`QtPromise::all`](../helpers/all.md)
|
||||
@ -25,10 +25,11 @@ QPromise<int> promise([](const QPromiseResolve<int>& resolve, const QPromiseReje
|
||||
```
|
||||
|
||||
::: tip NOTE
|
||||
`QPromise<void>` is specialized to not contain any value, meaning that the `resolve` callback takes no argument.
|
||||
`QPromise<void>` is specialized to not contain any value, meaning that the `resolve` callback takes
|
||||
no argument.
|
||||
:::
|
||||
|
||||
**C++14**
|
||||
C++14 alternative:
|
||||
|
||||
```cpp
|
||||
QPromise<int> promise([](const auto& resolve, const auto& reject) {
|
||||
@ -36,11 +37,13 @@ QPromise<int> promise([](const auto& resolve, const auto& reject) {
|
||||
});
|
||||
```
|
||||
|
||||
**Undefined rejection reason**
|
||||
## Undefined rejection reason
|
||||
|
||||
*Since: 0.5.0*
|
||||
|
||||
While not recommended because it makes tracking errors more difficult, it's also possible to reject a promise without explicit reason, in which case, a built-in [`QPromiseUndefinedException`](../exceptions/undefined.md) is thrown:
|
||||
While not recommended because it makes tracking errors more difficult, it's also possible to reject
|
||||
a promise without explicit reason, in which case, a built-in [`QPromiseUndefinedException`](../exceptions/undefined.md)
|
||||
is thrown:
|
||||
|
||||
```cpp
|
||||
QPromise<int> promise([](const QPromiseResolve<int>& resolve, const QPromiseReject<int>& reject) {
|
||||
|
||||
@ -10,7 +10,9 @@ title: .delay
|
||||
QPromise<T>::delay(int msec) -> QPromise<T>
|
||||
```
|
||||
|
||||
This method returns a promise that will be fulfilled with the same value as the `input` promise and after at least `msec` milliseconds. If the `input` promise is rejected, the `output` promise is immediately rejected with the same reason.
|
||||
This method returns a promise that will be fulfilled with the same value as the `input` promise
|
||||
and after at least `msec` milliseconds. If the `input` promise is rejected, the `output` promise
|
||||
is immediately rejected with the same reason.
|
||||
|
||||
```cpp
|
||||
QPromise<int> input = {...}
|
||||
|
||||
@ -18,7 +18,9 @@ QPromise<Sequence<T>>::each(Functor functor) -> QPromise<Sequence<T>>
|
||||
This method only applies to promise with sequence value.
|
||||
:::
|
||||
|
||||
Calls the given `functor` on each element in the promise value (i.e. `Sequence<T>`), then resolves to the original sequence unmodified. If `functor` throws, `output` is rejected with the new exception.
|
||||
Calls the given `functor` on each element in the promise value (i.e. `Sequence<T>`), then resolves
|
||||
to the original sequence unmodified. If `functor` throws, `output` is rejected with the new
|
||||
exception.
|
||||
|
||||
```cpp
|
||||
QPromise<QList<QByteArray>> input = {...}
|
||||
@ -33,7 +35,9 @@ output.then([](const QList<QByteArray>& res) {
|
||||
});
|
||||
```
|
||||
|
||||
If `functor` returns a promise (or `QFuture`), the `output` promise is delayed until all the promises are resolved. If any of the promises fail, `output` immediately rejects with the error of the promise that rejected, whether or not the other promises are resolved.
|
||||
If `functor` returns a promise (or `QFuture`), the `output` promise is delayed until all the
|
||||
promises are resolved. If any of the promises fail, `output` immediately rejects with the error
|
||||
of the promise that rejected, whether or not the other promises are resolved.
|
||||
|
||||
```cpp
|
||||
QPromise<QList<QUrl>> input = {...}
|
||||
|
||||
@ -18,9 +18,14 @@ QPromise<Sequence<T>>::filter(Filter filterer) -> QPromise<Sequence<T>>
|
||||
This method only applies to promise with sequence value.
|
||||
:::
|
||||
|
||||
Iterates over all the promise values (i.e. `Sequence<T>`) and [filters the sequence](https://en.wikipedia.org/wiki/Filter_%28higher-order_function%29) to another using the given `filterer` function. If `filterer` returns `true`, a copy of the item is put in the `output` sequence, otherwise, the item will not appear in `output`. If `filterer` throws, `output` is rejected with the new exception.
|
||||
Iterates over all the promise values (i.e. `Sequence<T>`) and [filters the sequence](https://en.wikipedia.org/wiki/Filter_%28higher-order_function%29)
|
||||
to another using the given `filterer` function. If `filterer` returns `true`, a copy of the item
|
||||
is put in the `output` sequence, otherwise, the item will not appear in `output`. If `filterer`
|
||||
throws, `output` is rejected with the new exception.
|
||||
|
||||
If `filterer` returns a promise (or `QFuture`), the `output` promise is delayed until all the promises are resolved. If any of the promises fail, `output` immediately rejects with the error of the promise that rejected, whether or not the other promises are resolved.
|
||||
If `filterer` returns a promise (or `QFuture`), the `output` promise is delayed until all the
|
||||
promises are resolved. If any of the promises fail, `output` immediately rejects with the error
|
||||
of the promise that rejected, whether or not the other promises are resolved.
|
||||
|
||||
```cpp
|
||||
QPromise<QList<QUrl>> input = {...}
|
||||
@ -43,7 +48,8 @@ output.then([](const QList<QUrl>& res) {
|
||||
```
|
||||
|
||||
::: tip NOTE
|
||||
The order of the output sequence values is guarantee to be the same as the original sequence, regardless of completion order of the promises returned by `filterer`.
|
||||
The order of the output sequence values is guarantee to be the same as the original sequence,
|
||||
regardless of completion order of the promises returned by `filterer`.
|
||||
:::
|
||||
|
||||
See also: [`QtPromise::filter`](../helpers/filter.md)
|
||||
|
||||
@ -10,7 +10,10 @@ title: .finally
|
||||
QPromise<T>::finally(Function handler) -> QPromise<T>
|
||||
```
|
||||
|
||||
This `handler` is **always** called, without any argument and whatever the `input` promise state (fulfilled or rejected). The `output` promise has the same type as the `input` one but also the same value or error. The finally `handler` **can not modify the fulfilled value** (the returned value is ignored), however, if `handler` throws, `output` is rejected with the new exception.
|
||||
This `handler` is **always** called, without any argument and whatever the `input` promise state
|
||||
(fulfilled or rejected). The `output` promise has the same type as the `input` one but also the
|
||||
same value or error. The finally `handler` **can not modify the fulfilled value** (the returned
|
||||
value is ignored), however, if `handler` throws, `output` is rejected with the new exception.
|
||||
|
||||
```cpp
|
||||
auto output = input.finally([]() {
|
||||
@ -18,4 +21,6 @@ auto output = input.finally([]() {
|
||||
});
|
||||
```
|
||||
|
||||
If `handler` returns a promise (or QFuture), the `output` promise is delayed until the returned promise is resolved and under the same conditions: the delayed value is ignored, the error transmitted to the `output` promise.
|
||||
If `handler` returns a promise (or QFuture), the `output` promise is delayed until the returned
|
||||
promise is resolved and under the same conditions: the delayed value is ignored, the error
|
||||
transmitted to the `output` promise.
|
||||
|
||||
@ -11,4 +11,3 @@ QPromise<T>::isRejected() -> bool
|
||||
```
|
||||
|
||||
Returns `true` if the promise is rejected, otherwise returns `false`.
|
||||
|
||||
|
||||
@ -18,9 +18,13 @@ QPromise<Sequence<T>>::map(Mapper mapper) -> QPromise<QVector<R>>
|
||||
This method only applies to promise with sequence value.
|
||||
:::
|
||||
|
||||
Iterates over all the promise values (i.e. `Sequence<T>`) and [maps the sequence](https://en.wikipedia.org/wiki/Map_%28higher-order_function%29) to another using the given `mapper` function. The type returned by `mapper` determines the type of the `output` promise. If `mapper` throws, `output` is rejected with the new exception.
|
||||
Iterates over all the promise values (i.e. `Sequence<T>`) and [maps the sequence](https://en.wikipedia.org/wiki/Map_%28higher-order_function%29)
|
||||
to another using the given `mapper` function. The type returned by `mapper` determines the type of
|
||||
the `output` promise. If `mapper` throws, `output` is rejected with the new exception.
|
||||
|
||||
If `mapper` returns a promise (or `QFuture`), the `output` promise is delayed until all the promises are resolved. If any of the promises fails, `output` immediately rejects with the error of the promise that rejected, whether or not the other promises are resolved.
|
||||
If `mapper` returns a promise (or `QFuture`), the `output` promise is delayed until all the promises
|
||||
are resolved. If any of the promises fails, `output` immediately rejects with the error of the
|
||||
promise that rejected, whether or not the other promises are resolved.
|
||||
|
||||
```cpp
|
||||
QPromise<QList<QUrl>> input = {...}
|
||||
@ -46,7 +50,8 @@ output.then([](const QVector<DownloadResult>& res) {
|
||||
```
|
||||
|
||||
::: tip NOTE
|
||||
The order of the output sequence values is guarantee to be the same as the original sequence, regardless of completion order of the promises returned by `mapper`.
|
||||
The order of the output sequence values is guarantee to be the same as the original sequence,
|
||||
regardless of completion order of the promises returned by `mapper`.
|
||||
:::
|
||||
|
||||
This function is provided for convenience and is similar to:
|
||||
|
||||
@ -19,9 +19,12 @@ QPromise<Sequence<T>>::reduce(Reducer reducer, R|QPromise<R> initialValue) -> QP
|
||||
This method only applies to promise with sequence value.
|
||||
:::
|
||||
|
||||
Iterates over all the promise values (i.e. `Sequence<T>`) and [reduces the sequence to a single value](https://en.wikipedia.org/wiki/Fold_%28higher-order_function%29) using the given `reducer` function and an optional `initialValue`. The type returned by `reducer` determines the type of the `output` promise.
|
||||
Iterates over all the promise values (i.e. `Sequence<T>`) and [reduces the sequence](https://en.wikipedia.org/wiki/Fold_%28higher-order_function%29)
|
||||
to a single value using the given `reducer` function and an optional `initialValue`. The type
|
||||
returned by `reducer` determines the type of the `output` promise.
|
||||
|
||||
See [`QtPromise::reduce`](../helpers/reduce.md) for details, this method is provided for convenience and is similar to:
|
||||
See [`QtPromise::reduce`](../helpers/reduce.md) for details, this method is provided for convenience
|
||||
and is similar to:
|
||||
|
||||
```cpp
|
||||
promise.then([](const T& values) {
|
||||
|
||||
@ -1,13 +1,13 @@
|
||||
---
|
||||
title: ::reject [static]
|
||||
title: ::reject (static)
|
||||
---
|
||||
|
||||
# QPromise::reject [static]
|
||||
# QPromise::reject (static)
|
||||
|
||||
*Since: 0.1.0*
|
||||
|
||||
```cpp
|
||||
[static] QPromise<T>::reject(any reason) -> QPromise<T>
|
||||
(static) QPromise<T>::reject(any reason) -> QPromise<T>
|
||||
```
|
||||
|
||||
Creates a `QPromise<T>` that is rejected with the given `reason` of *whatever type*:
|
||||
|
||||
@ -1,13 +1,13 @@
|
||||
---
|
||||
title: ::resolve [static]
|
||||
title: ::resolve (static)
|
||||
---
|
||||
|
||||
# QPromise::resolve [static]
|
||||
# QPromise::resolve (static)
|
||||
|
||||
*Since: 0.1.0*
|
||||
|
||||
```
|
||||
[static] QPromise<T>::resolve(T value) -> QPromise<T>
|
||||
```cpp
|
||||
(static) QPromise<T>::resolve(T value) -> QPromise<T>
|
||||
```
|
||||
|
||||
Creates a `QPromise<T>` that is fulfilled with the given `value` of type `T`:
|
||||
|
||||
@ -10,7 +10,10 @@ title: .tap
|
||||
QPromise<T>::tap(Function handler) -> QPromise<T>
|
||||
```
|
||||
|
||||
This `handler` allows to observe the value of the `input` promise, without changing the propagated value. The `output` promise will be resolved with the same value as the `input` promise (the `handler` returned value will be ignored). However, if `handler` throws, `output` is rejected with the new exception. Unlike [`finally`](finally.md), this handler is **not** called for rejections.
|
||||
This `handler` allows to observe the value of the `input` promise, without changing the propagated
|
||||
value. The `output` promise will be resolved with the same value as the `input` promise (the `handler`
|
||||
returned value will be ignored). However, if `handler` throws, `output` is rejected with the new
|
||||
exception. Unlike [`finally`](finally.md), this handler is **not** called for rejections.
|
||||
|
||||
```cpp
|
||||
QPromise<int> input = {...}
|
||||
@ -21,4 +24,6 @@ auto output = input.tap([](int res) {
|
||||
});
|
||||
```
|
||||
|
||||
If `handler` returns a promise (or QFuture), the `output` promise is delayed until the returned promise is resolved and under the same conditions: the delayed value is ignored, the error transmitted to the `output` promise.
|
||||
If `handler` returns a promise (or QFuture), the `output` promise is delayed until the returned
|
||||
promise is resolved and under the same conditions: the delayed value is ignored, the error
|
||||
transmitted to the `output` promise.
|
||||
|
||||
@ -10,7 +10,10 @@ title: .tapFail
|
||||
QPromise<T>::tapFail(Function handler) -> QPromise<T>
|
||||
```
|
||||
|
||||
This `handler` allows to observe errors of the `input` promise without handling them - similar to [`finally`](finally.md) but **only** called on rejections. The `output` promise has the same type as the `input` one but also the same value or error. However, if `handler` throws, `output` is rejected with the new exception.
|
||||
This `handler` allows to observe errors of the `input` promise without handling them - similar to
|
||||
[`finally`](finally.md) but **only** called on rejections. The `output` promise has the same type
|
||||
as the `input` one but also the same value or error. However, if `handler` throws, `output` is
|
||||
rejected with the new exception.
|
||||
|
||||
```cpp
|
||||
QPromise<int> input = {...}
|
||||
@ -24,4 +27,6 @@ auto output = input.tapFail([](Error err) {
|
||||
});
|
||||
```
|
||||
|
||||
If `handler` returns a promise (or QFuture), the `output` promise is delayed until the returned promise is resolved and under the same conditions: the delayed value is ignored, the error transmitted to the `output` promise.
|
||||
If `handler` returns a promise (or QFuture), the `output` promise is delayed until the returned
|
||||
promise is resolved and under the same conditions: the delayed value is ignored, the error
|
||||
transmitted to the `output` promise.
|
||||
|
||||
@ -24,7 +24,8 @@ auto output = input.then([](int res) {
|
||||
```
|
||||
|
||||
::: tip NOTE
|
||||
`onRejected` handler is optional, in which case `output` will be rejected with the same reason as `input`. Also note that it's recommended to use the [`fail`](fail.md) shorthand to handle errors.
|
||||
`onRejected` handler is optional, in which case `output` will be rejected with the same reason as
|
||||
`input`. Also note that it's recommended to use the [`fail`](fail.md) shorthand to handle errors.
|
||||
:::
|
||||
|
||||
The type `<R>` of the `output` promise depends on the return type of the `onFulfilled` handler:
|
||||
@ -42,7 +43,9 @@ output.then([](const QString& res) {
|
||||
```
|
||||
|
||||
::: tip NOTE
|
||||
Only `onFulfilled` can change the promise type, `onRejected` **must** return the same type as `onFulfilled`. That also means if `onFulfilled` is `nullptr`, `onRejected` must return the same type as the `input` promise.
|
||||
Only `onFulfilled` can change the promise type, `onRejected` **must** return the same type as
|
||||
`onFulfilled`. That also means if `onFulfilled` is `nullptr`, `onRejected` must return the same
|
||||
type as the `input` promise.
|
||||
:::
|
||||
|
||||
```cpp
|
||||
@ -92,4 +95,5 @@ auto output = input.then([](int res) {
|
||||
// output.isRejected() is true
|
||||
```
|
||||
|
||||
If an handler returns a promise (or QFuture), the `output` promise is delayed and will be resolved by the returned promise.
|
||||
If an handler returns a promise (or QFuture), the `output` promise is delayed and will be resolved
|
||||
by the returned promise.
|
||||
|
||||
@ -10,7 +10,10 @@ title: .timeout
|
||||
QPromise<T>::timeout(int msec, any error = QPromiseTimeoutException) -> QPromise<T>
|
||||
```
|
||||
|
||||
This method returns a promise that will be resolved with the `input` promise's fulfillment value or rejection reason. However, if the `input` promise is not fulfilled or rejected within `msec` milliseconds, the `output` promise is rejected with `error` as the reason ([`QPromiseTimeoutException`](../exceptions/timeout.md) by default).
|
||||
This method returns a promise that will be resolved with the `input` promise's fulfillment value
|
||||
or rejection reason. However, if the `input` promise is not fulfilled or rejected within `msec`
|
||||
milliseconds, the `output` promise is rejected with `error` as the reason ([`QPromiseTimeoutException`](../exceptions/timeout.md)
|
||||
by default).
|
||||
|
||||
```cpp
|
||||
QPromise<int> input = {...}
|
||||
|
||||
@ -10,7 +10,8 @@ title: .wait
|
||||
QPromise<T>::wait() -> QPromise<T>
|
||||
```
|
||||
|
||||
This method holds the execution of the remaining code until the `input` promise is resolved (either fulfilled or rejected), **without** blocking the event loop of the current thread:
|
||||
This method holds the execution of the remaining code until the `input` promise is resolved (either
|
||||
fulfilled or rejected), **without** blocking the event loop of the current thread:
|
||||
|
||||
```cpp
|
||||
int result = -1;
|
||||
|
||||
@ -1,10 +1,12 @@
|
||||
# Qt Concurrent
|
||||
|
||||
QtPromise integrates with [QtConcurrent](https://doc.qt.io/qt-5/qtconcurrent-index.html) to make easy chaining QFuture with QPromise.
|
||||
QtPromise integrates with [QtConcurrent](https://doc.qt.io/qt-5/qtconcurrent-index.html) to simplify
|
||||
chaining QFuture with QPromise.
|
||||
|
||||
## <a name="qtconcurrent-convert"></a> Convert
|
||||
## Convert
|
||||
|
||||
Converting `QFuture<T>` to `QPromise<T>` is done using the [`QtPromise::resolve`](helpers/resolve.md) helper:
|
||||
Converting `QFuture<T>` to `QPromise<T>` is done using the [`QtPromise::resolve`](helpers/resolve.md)
|
||||
helper:
|
||||
|
||||
```cpp
|
||||
QFuture<int> future = QtConcurrent::run([]() {
|
||||
@ -25,7 +27,8 @@ auto promise = QtPromise::resolve(QtConcurrent::run([]() {
|
||||
|
||||
## Chain
|
||||
|
||||
Returning a `QFuture<T>` in [`then`](qpromise/then.md) or [`fail`](qpromise/fail.md) automatically translate to `QPromise<T>`:
|
||||
Returning a `QFuture<T>` in [`then`](qpromise/then.md) or [`fail`](qpromise/fail.md) automatically
|
||||
translate to `QPromise<T>`:
|
||||
|
||||
```cpp
|
||||
QPromise<int> input = ...
|
||||
@ -46,7 +49,11 @@ The `output` promise is resolved when the `QFuture` is [finished](https://doc.qt
|
||||
|
||||
## Error
|
||||
|
||||
Exceptions thrown from a QtConcurrent thread reject the associated promise with the exception as the reason. Note that if you throw an exception that is not a subclass of `QException`, the promise will be rejected with [`QUnhandledException`](https://doc.qt.io/qt-5/qunhandledexception.html#details) (this restriction only applies to exceptions thrown from a QtConcurrent thread, [read more](https://doc.qt.io/qt-5/qexception.html#details)).
|
||||
Exceptions thrown from a QtConcurrent thread reject the associated promise with the exception as the
|
||||
reason. Note that if you throw an exception that is not a subclass of `QException`, the promise will
|
||||
be rejected with [`QUnhandledException`](https://doc.qt.io/qt-5/qunhandledexception.html#details)
|
||||
(this restriction only applies to exceptions thrown from a QtConcurrent thread,
|
||||
[read more](https://doc.qt.io/qt-5/qexception.html#details)).
|
||||
|
||||
```cpp
|
||||
QPromise<int> promise = ...
|
||||
|
||||
@ -3,12 +3,15 @@
|
||||
QtPromise supports creating promises that are resolved or rejected by regular [Qt signals](https://doc.qt.io/qt-5/signalsandslots.html).
|
||||
|
||||
::: warning IMPORTANT
|
||||
A promise connected to a signal will be resolved (fulfilled or rejected) **only one time**, no matter if the signals are emitted multiple times. Internally, the promise is disconnected from all signals as soon as one signal is emitted.
|
||||
A promise connected to a signal will be resolved (fulfilled or rejected) **only one time**, no
|
||||
matter if the signals are emitted multiple times. Internally, the promise is disconnected from
|
||||
all signals as soon as one signal is emitted.
|
||||
:::
|
||||
|
||||
## Resolve Signal
|
||||
|
||||
The [`QtPromise::connect()`](helpers/connect.md) helper allows to create a promise resolved from a single signal:
|
||||
The [`QtPromise::connect()`](helpers/connect.md) helper allows to create a promise resolved from
|
||||
a single signal:
|
||||
|
||||
```cpp
|
||||
// [signal] Object::finished(const QByteArray&)
|
||||
@ -33,12 +36,14 @@ output.then([]() {
|
||||
```
|
||||
|
||||
::: tip NOTE
|
||||
QtPromise currently only supports single argument signals, which means that only the first argument is used to fulfill or reject the connected promise, other arguments being ignored.
|
||||
QtPromise currently only supports single argument signals, which means that only the first argument
|
||||
is used to fulfill or reject the connected promise, other arguments being ignored.
|
||||
:::
|
||||
|
||||
## Reject Signal
|
||||
|
||||
The [`QtPromise::connect()`](helpers/connect.md) helper also allows to reject the promise from another signal:
|
||||
The [`QtPromise::connect()`](helpers/connect.md) helper also allows to reject the promise from
|
||||
another signal:
|
||||
|
||||
```cpp
|
||||
// [signal] Object::finished(const QByteArray& data)
|
||||
@ -53,8 +58,8 @@ output.then([](const QByteArray& data) {
|
||||
});
|
||||
```
|
||||
|
||||
If the rejection signal doesn't provide any argument, the promise will be rejected
|
||||
with [`QPromiseUndefinedException`](../exceptions/undefined), for example:
|
||||
If the rejection signal doesn't provide any argument, the promise will be rejected with
|
||||
[`QPromiseUndefinedException`](../exceptions/undefined), for example:
|
||||
|
||||
```cpp
|
||||
// [signal] Object::finished()
|
||||
@ -84,6 +89,8 @@ output.then([](const QByteArray& data) {
|
||||
});
|
||||
```
|
||||
|
||||
Additionally to the rejection signal, promises created using [`QtPromise::connect()`](helpers/connect.md) are automatically rejected with [`QPromiseContextException`](exceptions/context.md) if the sender is destroyed before fulfilling the promise.
|
||||
Additionally to the rejection signal, promises created using [`QtPromise::connect()`](helpers/connect.md)
|
||||
are automatically rejected with [`QPromiseContextException`](exceptions/context.md) if the sender is
|
||||
destroyed before fulfilling the promise.
|
||||
|
||||
See [`QtPromise::connect()`](helpers/connect.md) for more details.
|
||||
|
||||
@ -1,7 +1,12 @@
|
||||
# Thread-Safety
|
||||
|
||||
QPromise is thread-safe and can be copied and accessed across different threads. QPromise relies on [explicitly data sharing](https://doc.qt.io/qt-5/qexplicitlyshareddatapointer.html#details) and thus `auto p2 = p1` represents the same promise: when `p1` resolves, handlers registered on `p1` and `p2` are called, the fulfilled value being shared between both instances.
|
||||
QPromise is thread-safe and can be copied and accessed across different threads. QPromise relies on
|
||||
[explicitly data sharing](https://doc.qt.io/qt-5/qexplicitlyshareddatapointer.html#details) and thus
|
||||
`auto p2 = p1` represents the same promise: when `p1` resolves, handlers registered on `p1` and `p2`
|
||||
are called, the fulfilled value being shared between both instances.
|
||||
|
||||
::: warning IMPORTANT
|
||||
While it's safe to access the resolved value from different threads using [`then`](qpromise/then.md), QPromise provides no guarantee about the object being pointed to. Thread-safety and reentrancy rules for that object still apply.
|
||||
While it's safe to access the resolved value from different threads using [`then`](qpromise/then.md),
|
||||
QPromise provides no guarantee about the object being pointed to. Thread-safety and reentrancy rules
|
||||
for that object still apply.
|
||||
:::
|
||||
|
||||
11703
package-lock.json
generated
Normal file
11703
package-lock.json
generated
Normal file
File diff suppressed because it is too large
Load Diff
17
package.json
Normal file
17
package.json
Normal file
@ -0,0 +1,17 @@
|
||||
{
|
||||
"description": "qtpromise",
|
||||
"private": true,
|
||||
"scripts": {
|
||||
"docs:build": "vuepress build docs",
|
||||
"docs:dev": "vuepress dev docs",
|
||||
"docs:lint": "remark --quiet --frail ."
|
||||
},
|
||||
"devDependencies": {
|
||||
"@vuepress/plugin-google-analytics": "^1.2.0",
|
||||
"remark-cli": "^7.0.1",
|
||||
"remark-frontmatter": "^1.3.2",
|
||||
"remark-preset-lint-markdown-style-guide": "^2.1.3",
|
||||
"remark-preset-lint-recommended": "^3.0.3",
|
||||
"vuepress": "^1.2.0"
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user