Skip to content

Tracking issue for viewing Result/Option as slices #27776

Closed
#28339
Closed
Tracking issue for viewing Result/Option as slices#27776
#28339
Labels
B-unstableBlocker: Implemented in the nightly compiler and unstable.E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.T-libs-api[DEPRECATED; DO NOT USE]final-comment-periodIn the final comment period and will be merged soon unless new substantive objections are raised.
Milestone
1.4

Description

@alexcrichton
alexcrichton
opened on Aug 13, 2015

This is a tracking issue for the unstable as_slice feature in the standard library. These functions enable viewing a Result<T, U> and Option<T> as some form of [T] (both shared and mutably). In each case an array of at most one item will be returned.

It's somewhat unclear (like with ref_slice and ref_mut_slice) how useful these are and whether they should exist to me.

Metadata

Metadata

Assignees

No one assigned

    Labels

    B-unstableBlocker: Implemented in the nightly compiler and unstable.E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.T-libs-api[DEPRECATED; DO NOT USE]final-comment-periodIn the final comment period and will be merged soon unless new substantive objections are raised.

    Type

    No type

    Projects

    No projects

      Milestone

      Relationships

      None yet

      Development

      No branches or pull requests

      Issue actions

      , 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
       blocks
(function() {
function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
codeBlock.parentElement.setAttribute('data-copy-added', 'true');
var btn = document.createElement('button');
btn.textContent = 'Copy';
btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';
btn.onmouseover = function() { this.style.opacity = '1'; };
btn.onmouseout = function() { this.style.opacity = '0.7'; };
btn.onclick = function() {
navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
});
};
codeBlock.parentElement.style.position = 'relative';
codeBlock.parentElement.appendChild(btn);
});
}
addCopyButtons();
// Re-run on dynamic content
var observer = new MutationObserver(addCopyButtons);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
Tracking issue for viewing Result/Option as slices · Issue #27776 · rust-lang/rust · GitHub
      Skip to content
      Tracking issue for viewing Result/Option as slices #27776
      Closed
      #28339
      Closed
      Tracking issue for viewing Result/Option as slices#27776
      #28339
      Labels
      B-unstableBlocker: Implemented in the nightly compiler and unstable.E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.T-libs-api[DEPRECATED; DO NOT USE]final-comment-periodIn the final comment period and will be merged soon unless new substantive objections are raised.
      Milestone
      1.4
      Description
      @alexcrichton
      alexcrichton
      opened on Aug 13, 2015
      This is a tracking issue for the unstable as_slice feature in the standard library. These functions enable viewing a Result<T, U> and Option<T> as some form of [T] (both shared and mutably). In each case an array of at most one item will be returned.
      It's somewhat unclear (like with ref_slice and ref_mut_slice) how useful these are and whether they should exist to me.
      Metadata
      Metadata
      Assignees
      No one assigned
        Labels
        B-unstableBlocker: Implemented in the nightly compiler and unstable.E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.T-libs-api[DEPRECATED; DO NOT USE]final-comment-periodIn the final comment period and will be merged soon unless new substantive objections are raised.
        Type
        No type
        Projects
        No projects
          Milestone
          Relationships
          None yet
          Development
          No branches or pull requests
          Issue actions
          
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
(function() {
var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
.markdown-body pre { background: #161b22 !important; }
.markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }
.markdown-body table th, .markdown-body table td { border-color: #30363d !important; }
.markdown-body img { background: #0d1117; }
.markdown-body blockquote { border-left-color: #8b949e; }
.markdown-body hr { border-color: #30363d; }
';
document.head.appendChild(style);
})();
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Tracking issue for viewing Result/Option as slices · Issue #27776 · rust-lang/rust · GitHub
          Skip to content
          Tracking issue for viewing Result/Option as slices #27776
          Closed
          #28339
          Closed
          Tracking issue for viewing Result/Option as slices#27776
          #28339
          Labels
          B-unstableBlocker: Implemented in the nightly compiler and unstable.E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.T-libs-api[DEPRECATED; DO NOT USE]final-comment-periodIn the final comment period and will be merged soon unless new substantive objections are raised.
          Milestone
          1.4
          Description
          @alexcrichton
          alexcrichton
          opened on Aug 13, 2015
          This is a tracking issue for the unstable as_slice feature in the standard library. These functions enable viewing a Result<T, U> and Option<T> as some form of [T] (both shared and mutably). In each case an array of at most one item will be returned.
          It's somewhat unclear (like with ref_slice and ref_mut_slice) how useful these are and whether they should exist to me.
          Metadata
          Metadata
          Assignees
          No one assigned
            Labels
            B-unstableBlocker: Implemented in the nightly compiler and unstable.E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.T-libs-api[DEPRECATED; DO NOT USE]final-comment-periodIn the final comment period and will be merged soon unless new substantive objections are raised.
            Type
            No type
            Projects
            No projects
              Milestone
              Relationships
              None yet
              Development
              No branches or pull requests
              Issue actions
              
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
}
}
if (terms.length === 0) return;
var style = document.createElement('style');
style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
document.head.appendChild(style);
function highlight(node) {
if (node.nodeType === 3) { // text node
var text = node.textContent;
var found = false;
terms.forEach(function(term) {
var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi');
if (regex.test(text)) {
found = true;
var frag = document.createDocumentFragment();
var parts = text.split(regex);
parts.forEach(function(part, i) {
if (i % 2 === 0) {
frag.appendChild(document.createTextNode(part));
} else {
var span = document.createElement('span');
span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
}
});
node.parentNode.replaceChild(frag, node);
}
});
} else if (node.nodeType === 1 && node.childNodes) { // element
var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
}
highlight(document.body);
// Re-highlight on dynamic content
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Tracking issue for viewing Result/Option as slices · Issue #27776 · rust-lang/rust · GitHub
              Skip to content
              Tracking issue for viewing Result/Option as slices #27776
              Closed
              #28339
              Closed
              Tracking issue for viewing Result/Option as slices#27776
              #28339
              Labels
              B-unstableBlocker: Implemented in the nightly compiler and unstable.E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.T-libs-api[DEPRECATED; DO NOT USE]final-comment-periodIn the final comment period and will be merged soon unless new substantive objections are raised.
              Milestone
              1.4
              Description
              @alexcrichton
              alexcrichton
              opened on Aug 13, 2015
              This is a tracking issue for the unstable as_slice feature in the standard library. These functions enable viewing a Result<T, U> and Option<T> as some form of [T] (both shared and mutably). In each case an array of at most one item will be returned.
              It's somewhat unclear (like with ref_slice and ref_mut_slice) how useful these are and whether they should exist to me.
              Metadata
              Metadata
              Assignees
              No one assigned
                Labels
                B-unstableBlocker: Implemented in the nightly compiler and unstable.E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.T-libs-api[DEPRECATED; DO NOT USE]final-comment-periodIn the final comment period and will be merged soon unless new substantive objections are raised.
                Type
                No type
                Projects
                No projects
                  Milestone
                  Relationships
                  None yet
                  Development
                  No branches or pull requests
                  Issue actions
                  
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
Tracking issue for viewing Result/Option as slices · Issue #27776 · rust-lang/rust · GitHub
                  Skip to content
                  Tracking issue for viewing Result/Option as slices #27776
                  Closed
                  #28339
                  Closed
                  Tracking issue for viewing Result/Option as slices#27776
                  #28339
                  Labels
                  B-unstableBlocker: Implemented in the nightly compiler and unstable.E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.T-libs-api[DEPRECATED; DO NOT USE]final-comment-periodIn the final comment period and will be merged soon unless new substantive objections are raised.
                  Milestone
                  1.4
                  Description
                  @alexcrichton
                  alexcrichton
                  opened on Aug 13, 2015
                  This is a tracking issue for the unstable as_slice feature in the standard library. These functions enable viewing a Result<T, U> and Option<T> as some form of [T] (both shared and mutably). In each case an array of at most one item will be returned.
                  It's somewhat unclear (like with ref_slice and ref_mut_slice) how useful these are and whether they should exist to me.
                  Metadata
                  Metadata
                  Assignees
                  No one assigned
                    Labels
                    B-unstableBlocker: Implemented in the nightly compiler and unstable.E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.T-libs-api[DEPRECATED; DO NOT USE]final-comment-periodIn the final comment period and will be merged soon unless new substantive objections are raised.
                    Type
                    No type
                    Projects
                    No projects
                      Milestone
                      Relationships
                      None yet
                      Development
                      No branches or pull requests
                      Issue actions
                      
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Tracking issue for viewing Result/Option as slices · Issue #27776 · rust-lang/rust · GitHub
                      Skip to content
                      Tracking issue for viewing Result/Option as slices #27776
                      Closed
                      #28339
                      Closed
                      Tracking issue for viewing Result/Option as slices#27776
                      #28339
                      Labels
                      B-unstableBlocker: Implemented in the nightly compiler and unstable.E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.T-libs-api[DEPRECATED; DO NOT USE]final-comment-periodIn the final comment period and will be merged soon unless new substantive objections are raised.
                      Milestone
                      1.4
                      Description
                      @alexcrichton
                      alexcrichton
                      opened on Aug 13, 2015
                      This is a tracking issue for the unstable as_slice feature in the standard library. These functions enable viewing a Result<T, U> and Option<T> as some form of [T] (both shared and mutably). In each case an array of at most one item will be returned.
                      It's somewhat unclear (like with ref_slice and ref_mut_slice) how useful these are and whether they should exist to me.
                      Metadata
                      Metadata
                      Assignees
                      No one assigned
                        Labels
                        B-unstableBlocker: Implemented in the nightly compiler and unstable.E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.T-libs-api[DEPRECATED; DO NOT USE]final-comment-periodIn the final comment period and will be merged soon unless new substantive objections are raised.
                        Type
                        No type
                        Projects
                        No projects
                          Milestone
                          Relationships
                          None yet
                          Development
                          No branches or pull requests
                          Issue actions
                          
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Tracking issue for viewing Result/Option as slices · Issue #27776 · rust-lang/rust · GitHub
                          Skip to content
                          Tracking issue for viewing Result/Option as slices #27776
                          Closed
                          #28339
                          Closed
                          Tracking issue for viewing Result/Option as slices#27776
                          #28339
                          Labels
                          B-unstableBlocker: Implemented in the nightly compiler and unstable.E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.T-libs-api[DEPRECATED; DO NOT USE]final-comment-periodIn the final comment period and will be merged soon unless new substantive objections are raised.
                          Milestone
                          1.4
                          Description
                          @alexcrichton
                          alexcrichton
                          opened on Aug 13, 2015
                          This is a tracking issue for the unstable as_slice feature in the standard library. These functions enable viewing a Result<T, U> and Option<T> as some form of [T] (both shared and mutably). In each case an array of at most one item will be returned.
                          It's somewhat unclear (like with ref_slice and ref_mut_slice) how useful these are and whether they should exist to me.
                          Metadata
                          Metadata
                          Assignees
                          No one assigned
                            Labels
                            B-unstableBlocker: Implemented in the nightly compiler and unstable.E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.T-libs-api[DEPRECATED; DO NOT USE]final-comment-periodIn the final comment period and will be merged soon unless new substantive objections are raised.
                            Type
                            No type
                            Projects
                            No projects
                              Milestone
                              Relationships
                              None yet
                              Development
                              No branches or pull requests
                              Issue actions
                              
, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();
Tracking issue for viewing Result/Option as slices · Issue #27776 · rust-lang/rust · GitHub
                              Skip to content
                              Tracking issue for viewing Result/Option as slices #27776
                              Closed
                              #28339
                              Closed
                              Tracking issue for viewing Result/Option as slices#27776
                              #28339
                              Labels
                              B-unstableBlocker: Implemented in the nightly compiler and unstable.E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.T-libs-api[DEPRECATED; DO NOT USE]final-comment-periodIn the final comment period and will be merged soon unless new substantive objections are raised.
                              Milestone
                              1.4
                              Description
                              @alexcrichton
                              alexcrichton
                              opened on Aug 13, 2015
                              This is a tracking issue for the unstable as_slice feature in the standard library. These functions enable viewing a Result<T, U> and Option<T> as some form of [T] (both shared and mutably). In each case an array of at most one item will be returned.
                              It's somewhat unclear (like with ref_slice and ref_mut_slice) how useful these are and whether they should exist to me.
                              Metadata
                              Metadata
                              Assignees
                              No one assigned
                                Labels
                                B-unstableBlocker: Implemented in the nightly compiler and unstable.E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.T-libs-api[DEPRECATED; DO NOT USE]final-comment-periodIn the final comment period and will be merged soon unless new substantive objections are raised.
                                Type
                                No type
                                Projects
                                No projects
                                  Milestone
                                  Relationships
                                  None yet
                                  Development
                                  No branches or pull requests
                                  Issue actions