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opaquerr

Opaque error type with a user-defined kind.

opaquerr is a small no_std error helper for libraries that want to expose a stable error kind while keeping the concrete error payload opaque. The kind stays easy to compare and match on, while the displayed message can come from the kind, a custom message, or an underlying source error.

Installation

[dependencies]
opaquerr = "<version>"

Enable alloc when you need boxed source errors:

[dependencies]
opaquerr = { version = "<version>", features = ["alloc"] }

Example

opaquerr::define_kind! {/// Category for a library error.pubErrorKind{/// Input is invalid.Invalid => "input is invalid",/// Anything not covered by the categories above.Other => "other error",}}
opaquerr::define_error! {/// Library error.pubError(ErrorKind)}pubfnparse(input:&str) -> Result<(),Error>{if input.is_empty(){returnErr(Error::with_static_message(ErrorKind::Invalid,"empty input"));}Ok(())}

With the alloc feature enabled, define_error! can map source errors once and then propagate them with ?:

opaquerr::define_error! {pubError(ErrorKind)
from {
core::num::ParseIntError => ErrorKind::Other,}}

Changelog

All notable changes to this library are documented in the CHANGELOG.md.

License

This project is distributed under the MIT software license. See the LICENSE file for details.

About

Opaque error type with a user-defined kind.

Resources

Readme
MIT license
Activity
Custom properties

Stars

0 stars

Watchers

1 watching

Forks

0 forks
Report repository

Releases

Contributors

Languages

, '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" + '

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opaquerr
Opaque error type with a user-defined kind.
opaquerr is a small no_std error helper for libraries that want to expose a
stable error kind while keeping the concrete error payload opaque. The kind stays
easy to compare and match on, while the displayed message can come from the kind,
a custom message, or an underlying source error.
Installation
[dependencies]
opaquerr = "<version>"
Enable alloc when you need boxed source errors:
[dependencies]
opaquerr = { version = "<version>", features = ["alloc"] }
Example
opaquerr::define_kind! {/// Category for a library error.pubErrorKind{/// Input is invalid.Invalid => "input is invalid",/// Anything not covered by the categories above.Other => "other error",}}
opaquerr::define_error! {/// Library error.pubError(ErrorKind)}pubfnparse(input:&str) -> Result<(),Error>{if input.is_empty(){returnErr(Error::with_static_message(ErrorKind::Invalid,"empty input"));}Ok(())}
With the alloc feature enabled, define_error! can map source errors once and then
propagate them with ?:
opaquerr::define_error! {pubError(ErrorKind)
from {
core::num::ParseIntError => ErrorKind::Other,}}
Changelog
All notable changes to this library are documented in the CHANGELOG.md.
License
This project is distributed under the MIT software license. See the LICENSE file for details.
About
Opaque error type with a user-defined kind.
Resources
Readme
MIT license
Activity
Custom properties
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Contributors
Languages

, '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
BranchesTags
Repository files navigation
opaquerr
Opaque error type with a user-defined kind.
opaquerr is a small no_std error helper for libraries that want to expose a
stable error kind while keeping the concrete error payload opaque. The kind stays
easy to compare and match on, while the displayed message can come from the kind,
a custom message, or an underlying source error.
Installation
[dependencies]
opaquerr = "<version>"
Enable alloc when you need boxed source errors:
[dependencies]
opaquerr = { version = "<version>", features = ["alloc"] }
Example
opaquerr::define_kind! {/// Category for a library error.pubErrorKind{/// Input is invalid.Invalid => "input is invalid",/// Anything not covered by the categories above.Other => "other error",}}
opaquerr::define_error! {/// Library error.pubError(ErrorKind)}pubfnparse(input:&str) -> Result<(),Error>{if input.is_empty(){returnErr(Error::with_static_message(ErrorKind::Invalid,"empty input"));}Ok(())}
With the alloc feature enabled, define_error! can map source errors once and then
propagate them with ?:
opaquerr::define_error! {pubError(ErrorKind)
from {
core::num::ParseIntError => ErrorKind::Other,}}
Changelog
All notable changes to this library are documented in the CHANGELOG.md.
License
This project is distributed under the MIT software license. See the LICENSE file for details.
About
Opaque error type with a user-defined kind.
Resources
Readme
MIT license
Activity
Custom properties
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Contributors
Languages

, '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
BranchesTags
Repository files navigation
opaquerr
Opaque error type with a user-defined kind.
opaquerr is a small no_std error helper for libraries that want to expose a
stable error kind while keeping the concrete error payload opaque. The kind stays
easy to compare and match on, while the displayed message can come from the kind,
a custom message, or an underlying source error.
Installation
[dependencies]
opaquerr = "<version>"
Enable alloc when you need boxed source errors:
[dependencies]
opaquerr = { version = "<version>", features = ["alloc"] }
Example
opaquerr::define_kind! {/// Category for a library error.pubErrorKind{/// Input is invalid.Invalid => "input is invalid",/// Anything not covered by the categories above.Other => "other error",}}
opaquerr::define_error! {/// Library error.pubError(ErrorKind)}pubfnparse(input:&str) -> Result<(),Error>{if input.is_empty(){returnErr(Error::with_static_message(ErrorKind::Invalid,"empty input"));}Ok(())}
With the alloc feature enabled, define_error! can map source errors once and then
propagate them with ?:
opaquerr::define_error! {pubError(ErrorKind)
from {
core::num::ParseIntError => ErrorKind::Other,}}
Changelog
All notable changes to this library are documented in the CHANGELOG.md.
License
This project is distributed under the MIT software license. See the LICENSE file for details.
About
Opaque error type with a user-defined kind.
Resources
Readme
MIT license
Activity
Custom properties
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Contributors
Languages

, '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
BranchesTags
Repository files navigation
opaquerr
Opaque error type with a user-defined kind.
opaquerr is a small no_std error helper for libraries that want to expose a
stable error kind while keeping the concrete error payload opaque. The kind stays
easy to compare and match on, while the displayed message can come from the kind,
a custom message, or an underlying source error.
Installation
[dependencies]
opaquerr = "<version>"
Enable alloc when you need boxed source errors:
[dependencies]
opaquerr = { version = "<version>", features = ["alloc"] }
Example
opaquerr::define_kind! {/// Category for a library error.pubErrorKind{/// Input is invalid.Invalid => "input is invalid",/// Anything not covered by the categories above.Other => "other error",}}
opaquerr::define_error! {/// Library error.pubError(ErrorKind)}pubfnparse(input:&str) -> Result<(),Error>{if input.is_empty(){returnErr(Error::with_static_message(ErrorKind::Invalid,"empty input"));}Ok(())}
With the alloc feature enabled, define_error! can map source errors once and then
propagate them with ?:
opaquerr::define_error! {pubError(ErrorKind)
from {
core::num::ParseIntError => ErrorKind::Other,}}
Changelog
All notable changes to this library are documented in the CHANGELOG.md.
License
This project is distributed under the MIT software license. See the LICENSE file for details.
About
Opaque error type with a user-defined kind.
Resources
Readme
MIT license
Activity
Custom properties
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Contributors
Languages

, '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
BranchesTags
Repository files navigation
opaquerr
Opaque error type with a user-defined kind.
opaquerr is a small no_std error helper for libraries that want to expose a
stable error kind while keeping the concrete error payload opaque. The kind stays
easy to compare and match on, while the displayed message can come from the kind,
a custom message, or an underlying source error.
Installation
[dependencies]
opaquerr = "<version>"
Enable alloc when you need boxed source errors:
[dependencies]
opaquerr = { version = "<version>", features = ["alloc"] }
Example
opaquerr::define_kind! {/// Category for a library error.pubErrorKind{/// Input is invalid.Invalid => "input is invalid",/// Anything not covered by the categories above.Other => "other error",}}
opaquerr::define_error! {/// Library error.pubError(ErrorKind)}pubfnparse(input:&str) -> Result<(),Error>{if input.is_empty(){returnErr(Error::with_static_message(ErrorKind::Invalid,"empty input"));}Ok(())}
With the alloc feature enabled, define_error! can map source errors once and then
propagate them with ?:
opaquerr::define_error! {pubError(ErrorKind)
from {
core::num::ParseIntError => ErrorKind::Other,}}
Changelog
All notable changes to this library are documented in the CHANGELOG.md.
License
This project is distributed under the MIT software license. See the LICENSE file for details.
About
Opaque error type with a user-defined kind.
Resources
Readme
MIT license
Activity
Custom properties
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Contributors
Languages

, '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
BranchesTags
Repository files navigation
opaquerr
Opaque error type with a user-defined kind.
opaquerr is a small no_std error helper for libraries that want to expose a
stable error kind while keeping the concrete error payload opaque. The kind stays
easy to compare and match on, while the displayed message can come from the kind,
a custom message, or an underlying source error.
Installation
[dependencies]
opaquerr = "<version>"
Enable alloc when you need boxed source errors:
[dependencies]
opaquerr = { version = "<version>", features = ["alloc"] }
Example
opaquerr::define_kind! {/// Category for a library error.pubErrorKind{/// Input is invalid.Invalid => "input is invalid",/// Anything not covered by the categories above.Other => "other error",}}
opaquerr::define_error! {/// Library error.pubError(ErrorKind)}pubfnparse(input:&str) -> Result<(),Error>{if input.is_empty(){returnErr(Error::with_static_message(ErrorKind::Invalid,"empty input"));}Ok(())}
With the alloc feature enabled, define_error! can map source errors once and then
propagate them with ?:
opaquerr::define_error! {pubError(ErrorKind)
from {
core::num::ParseIntError => ErrorKind::Other,}}
Changelog
All notable changes to this library are documented in the CHANGELOG.md.
License
This project is distributed under the MIT software license. See the LICENSE file for details.
About
Opaque error type with a user-defined kind.
Resources
Readme
MIT license
Activity
Custom properties
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Contributors
Languages

, '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
BranchesTags
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opaquerr
Opaque error type with a user-defined kind.
opaquerr is a small no_std error helper for libraries that want to expose a
stable error kind while keeping the concrete error payload opaque. The kind stays
easy to compare and match on, while the displayed message can come from the kind,
a custom message, or an underlying source error.
Installation
[dependencies]
opaquerr = "<version>"
Enable alloc when you need boxed source errors:
[dependencies]
opaquerr = { version = "<version>", features = ["alloc"] }
Example
opaquerr::define_kind! {/// Category for a library error.pubErrorKind{/// Input is invalid.Invalid => "input is invalid",/// Anything not covered by the categories above.Other => "other error",}}
opaquerr::define_error! {/// Library error.pubError(ErrorKind)}pubfnparse(input:&str) -> Result<(),Error>{if input.is_empty(){returnErr(Error::with_static_message(ErrorKind::Invalid,"empty input"));}Ok(())}
With the alloc feature enabled, define_error! can map source errors once and then
propagate them with ?:
opaquerr::define_error! {pubError(ErrorKind)
from {
core::num::ParseIntError => ErrorKind::Other,}}
Changelog
All notable changes to this library are documented in the CHANGELOG.md.
License
This project is distributed under the MIT software license. See the LICENSE file for details.
About
Opaque error type with a user-defined kind.
Resources
Readme
MIT license
Activity
Custom properties
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Contributors
Languages