The each_char method on &str doesn't work because multiple applicable methods are in scope #6281

Closed
Closed
The each_char method on &str doesn't work because multiple applicable methods are in scope#6281

Description

@Thiez
Thiez
opened on May 6, 2013

The following program

fnmain(){
do "somestr".each_char |_| {false}}

Gives this error:

treegrep.rs:2:39: 2:40 error: multiple applicable methods in scope
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 note: candidate #1 is `core::io::__extensions__::each_char`
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 note: candidate #2 is `core::str::__extensions__::each_char`
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 error: failed to find an implementation of trait core::io::Reader for &'static str
treegrep.rs:2 do "somestr".each_char |_| { false }
^

It seems this significantly reduces the utility of each_char. Interestingly the last error (failed to find an implementation...) only shows up about half the time.
I'm not entirely sure how &str implements ReaderUtil.

Metadata

Metadata

Assignees

No one assigned

    Labels

    No labels
    No labels

    Type

    No type

    Projects

    No projects

      Milestone

      No milestone

      Relationships

      None yet

      Development

      No branches or pull requests

      Issue actions

      , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
       blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n 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;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

      Skip to content
      The each_char method on &str doesn't work because multiple applicable methods are in scope #6281
      Closed
      Closed
      The each_char method on &str doesn't work because multiple applicable methods are in scope#6281
      Description
      @Thiez
      Thiez
      opened on May 6, 2013
      The following program
      fnmain(){
do "somestr".each_char |_| {false}}
      Gives this error:
      treegrep.rs:2:39: 2:40 error: multiple applicable methods in scope
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 note: candidate #1 is `core::io::__extensions__::each_char`
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 note: candidate #2 is `core::str::__extensions__::each_char`
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 error: failed to find an implementation of trait core::io::Reader for &'static str
treegrep.rs:2 do "somestr".each_char |_| { false }
^

      It seems this significantly reduces the utility of each_char. Interestingly the last error (failed to find an implementation...) only shows up about half the time.
      
I'm not entirely sure how &str implements ReaderUtil.
      Metadata
      Metadata
      Assignees
      No one assigned
        Labels
        No labels
        No labels
        Type
        No type
        Projects
        No projects
          Milestone
          No milestone
          Relationships
          None yet
          Development
          No branches or pull requests
          Issue actions
          
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

          Skip to content
          The each_char method on &str doesn't work because multiple applicable methods are in scope #6281
          Closed
          Closed
          The each_char method on &str doesn't work because multiple applicable methods are in scope#6281
          Description
          @Thiez
          Thiez
          opened on May 6, 2013
          The following program
          fnmain(){
do "somestr".each_char |_| {false}}
          Gives this error:
          treegrep.rs:2:39: 2:40 error: multiple applicable methods in scope
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 note: candidate #1 is `core::io::__extensions__::each_char`
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 note: candidate #2 is `core::str::__extensions__::each_char`
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 error: failed to find an implementation of trait core::io::Reader for &'static str
treegrep.rs:2 do "somestr".each_char |_| { false }
^

          It seems this significantly reduces the utility of each_char. Interestingly the last error (failed to find an implementation...) only shows up about half the time.
          
I'm not entirely sure how &str implements ReaderUtil.
          Metadata
          Metadata
          Assignees
          No one assigned
            Labels
            No labels
            No labels
            Type
            No type
            Projects
            No projects
              Milestone
              No milestone
              Relationships
              None yet
              Development
              No branches or pull requests
              Issue actions
              
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

              Skip to content
              The each_char method on &str doesn't work because multiple applicable methods are in scope #6281
              Closed
              Closed
              The each_char method on &str doesn't work because multiple applicable methods are in scope#6281
              Description
              @Thiez
              Thiez
              opened on May 6, 2013
              The following program
              fnmain(){
do "somestr".each_char |_| {false}}
              Gives this error:
              treegrep.rs:2:39: 2:40 error: multiple applicable methods in scope
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 note: candidate #1 is `core::io::__extensions__::each_char`
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 note: candidate #2 is `core::str::__extensions__::each_char`
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 error: failed to find an implementation of trait core::io::Reader for &'static str
treegrep.rs:2 do "somestr".each_char |_| { false }
^

              It seems this significantly reduces the utility of each_char. Interestingly the last error (failed to find an implementation...) only shows up about half the time.
              
I'm not entirely sure how &str implements ReaderUtil.
              Metadata
              Metadata
              Assignees
              No one assigned
                Labels
                No labels
                No labels
                Type
                No type
                Projects
                No projects
                  Milestone
                  No milestone
                  Relationships
                  None yet
                  Development
                  No branches or pull requests
                  Issue actions
                  
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

                  Skip to content
                  The each_char method on &str doesn't work because multiple applicable methods are in scope #6281
                  Closed
                  Closed
                  The each_char method on &str doesn't work because multiple applicable methods are in scope#6281
                  Description
                  @Thiez
                  Thiez
                  opened on May 6, 2013
                  The following program
                  fnmain(){
do "somestr".each_char |_| {false}}
                  Gives this error:
                  treegrep.rs:2:39: 2:40 error: multiple applicable methods in scope
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 note: candidate #1 is `core::io::__extensions__::each_char`
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 note: candidate #2 is `core::str::__extensions__::each_char`
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 error: failed to find an implementation of trait core::io::Reader for &'static str
treegrep.rs:2 do "somestr".each_char |_| { false }
^

                  It seems this significantly reduces the utility of each_char. Interestingly the last error (failed to find an implementation...) only shows up about half the time.
                  
I'm not entirely sure how &str implements ReaderUtil.
                  Metadata
                  Metadata
                  Assignees
                  No one assigned
                    Labels
                    No labels
                    No labels
                    Type
                    No type
                    Projects
                    No projects
                      Milestone
                      No milestone
                      Relationships
                      None yet
                      Development
                      No branches or pull requests
                      Issue actions
                      
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

                      Skip to content
                      The each_char method on &str doesn't work because multiple applicable methods are in scope #6281
                      Closed
                      Closed
                      The each_char method on &str doesn't work because multiple applicable methods are in scope#6281
                      Description
                      @Thiez
                      Thiez
                      opened on May 6, 2013
                      The following program
                      fnmain(){
do "somestr".each_char |_| {false}}
                      Gives this error:
                      treegrep.rs:2:39: 2:40 error: multiple applicable methods in scope
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 note: candidate #1 is `core::io::__extensions__::each_char`
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 note: candidate #2 is `core::str::__extensions__::each_char`
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 error: failed to find an implementation of trait core::io::Reader for &'static str
treegrep.rs:2 do "somestr".each_char |_| { false }
^

                      It seems this significantly reduces the utility of each_char. Interestingly the last error (failed to find an implementation...) only shows up about half the time.
                      
I'm not entirely sure how &str implements ReaderUtil.
                      Metadata
                      Metadata
                      Assignees
                      No one assigned
                        Labels
                        No labels
                        No labels
                        Type
                        No type
                        Projects
                        No projects
                          Milestone
                          No milestone
                          Relationships
                          None yet
                          Development
                          No branches or pull requests
                          Issue actions
                          
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

                          Skip to content
                          The each_char method on &str doesn't work because multiple applicable methods are in scope #6281
                          Closed
                          Closed
                          The each_char method on &str doesn't work because multiple applicable methods are in scope#6281
                          Description
                          @Thiez
                          Thiez
                          opened on May 6, 2013
                          The following program
                          fnmain(){
do "somestr".each_char |_| {false}}
                          Gives this error:
                          treegrep.rs:2:39: 2:40 error: multiple applicable methods in scope
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 note: candidate #1 is `core::io::__extensions__::each_char`
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 note: candidate #2 is `core::str::__extensions__::each_char`
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 error: failed to find an implementation of trait core::io::Reader for &'static str
treegrep.rs:2 do "somestr".each_char |_| { false }
^

                          It seems this significantly reduces the utility of each_char. Interestingly the last error (failed to find an implementation...) only shows up about half the time.
                          
I'm not entirely sure how &str implements ReaderUtil.
                          Metadata
                          Metadata
                          Assignees
                          No one assigned
                            Labels
                            No labels
                            No labels
                            Type
                            No type
                            Projects
                            No projects
                              Milestone
                              No milestone
                              Relationships
                              None yet
                              Development
                              No branches or pull requests
                              Issue actions
                              
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

                              Skip to content
                              The each_char method on &str doesn't work because multiple applicable methods are in scope #6281
                              Closed
                              Closed
                              The each_char method on &str doesn't work because multiple applicable methods are in scope#6281
                              Description
                              @Thiez
                              Thiez
                              opened on May 6, 2013
                              The following program
                              fnmain(){
do "somestr".each_char |_| {false}}
                              Gives this error:
                              treegrep.rs:2:39: 2:40 error: multiple applicable methods in scope
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 note: candidate #1 is `core::io::__extensions__::each_char`
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 note: candidate #2 is `core::str::__extensions__::each_char`
treegrep.rs:2 do "somestr".each_char |_| { false }
^
treegrep.rs:2:39: 2:40 error: failed to find an implementation of trait core::io::Reader for &'static str
treegrep.rs:2 do "somestr".each_char |_| { false }
^

                              It seems this significantly reduces the utility of each_char. Interestingly the last error (failed to find an implementation...) only shows up about half the time.
                              
I'm not entirely sure how &str implements ReaderUtil.
                              Metadata
                              Metadata
                              Assignees
                              No one assigned
                                Labels
                                No labels
                                No labels
                                Type
                                No type
                                Projects
                                No projects
                                  Milestone
                                  No milestone
                                  Relationships
                                  None yet
                                  Development
                                  No branches or pull requests
                                  Issue actions