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qualifier_attr

Latest VersionDownloadsDocumentationLicenseDependency Status

Procedural macro attributes for adding "qualifiers" to various items.

At the moment, the crate supports the following "qualifiers":

  • pub, pub(crate), etc. - visibility and restriction
  • default - default implementations (a feature of specialization)
  • async - asynchronous code, e.g. async fn
  • unsafe - unsafe code, e.g. unsafe fn, unsafe trait
  • const - code that may run at compile time, e.g. const fn
  • extern "ABI" - specifying an ABI, e.g. extern "C" fn

Limitations

Examples

#[macro_use]externcrate qualifier_attr;// We can add a qualifier to a function// with an attribute.#[qualifiers(const)]fnconst_fn() -> u32{42}constCONST_RES:u32 = const_fn();// It's not so impressive on its own,// but with `cfg_attr`, it can be conditional.#[cfg_attr(feature = "extern_c", no_mangle, qualifiers(pub, extern "C"))]fnextern_c_fn() -> u32{42}// It even works with types, imports, and more!mod foo {#[qualifiers(pub)]structFoo{x:i32,y:i32,}}#[qualifiers(pub)]use foo::Foo;// Traits and implementations too!?#[cfg_attr(feature = "unsafe_quux", qualifiers(unsafe))]traitQuux{fnquux_the_thing();}#[cfg_attr(feature = "unsafe_quux", qualifiers(unsafe))]implQuuxforFoo{fnquux_the_thing(){println!("The thing was quuxed.");}}// You can add qualifiers to the fields of a// struct as well with this special attribute.#[field_qualifiers(x(pub), y(pub))]structPoint2{x:i32,y:i32,}#[field_qualifiers(_0(pub), _1(pub), _2(pub))]structPoint3(i32,i32,i32);

Learn more about cfg_attrhere.

Note on legacy attributes

Before version 0.2.0, this crate provided a separate attribute for each kind of item. While this should generally be a small win for compile times, it is generally not justified by the additional complexity. The legacy attributes are still available behind the default legacy_attrs feature flag, but their use is currently discouraged. In order to disable the legacy attributes, add the following to your Cargo.toml:

[dependencies]
qualifier_attr = { version = "0.2", default-features = false }

Similar crates

License

Licensed under either of Apache License, Version 2.0 or MIT license at your option.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this crate by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

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Procedural macro attributes for adding "qualifiers" to various items.

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, '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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qualifier_attr
Latest VersionDownloadsDocumentationLicenseDependency Status
Procedural macro attributes for adding "qualifiers" to various items.
At the moment, the crate supports the following "qualifiers":
  • pub, pub(crate), etc. - visibility and restriction
  • default - default implementations (a feature of specialization)
  • async - asynchronous code, e.g. async fn
  • unsafe - unsafe code, e.g. unsafe fn, unsafe trait
  • const - code that may run at compile time, e.g. const fn
  • extern "ABI" - specifying an ABI, e.g. extern "C" fn
Limitations
Examples
#[macro_use]externcrate qualifier_attr;// We can add a qualifier to a function// with an attribute.#[qualifiers(const)]fnconst_fn() -> u32{42}constCONST_RES:u32 = const_fn();// It's not so impressive on its own,// but with `cfg_attr`, it can be conditional.#[cfg_attr(feature = "extern_c", no_mangle, qualifiers(pub, extern "C"))]fnextern_c_fn() -> u32{42}// It even works with types, imports, and more!mod foo {#[qualifiers(pub)]structFoo{x:i32,y:i32,}}#[qualifiers(pub)]use foo::Foo;// Traits and implementations too!?#[cfg_attr(feature = "unsafe_quux", qualifiers(unsafe))]traitQuux{fnquux_the_thing();}#[cfg_attr(feature = "unsafe_quux", qualifiers(unsafe))]implQuuxforFoo{fnquux_the_thing(){println!("The thing was quuxed.");}}// You can add qualifiers to the fields of a// struct as well with this special attribute.#[field_qualifiers(x(pub), y(pub))]structPoint2{x:i32,y:i32,}#[field_qualifiers(_0(pub), _1(pub), _2(pub))]structPoint3(i32,i32,i32);
Learn more about cfg_attrhere.
Note on legacy attributes
Before version 0.2.0, this crate provided a separate attribute for each kind of item. While this should generally be a small win for compile times, it is generally not justified by the additional complexity. The legacy attributes are still available behind the default legacy_attrs feature flag, but their use is currently discouraged. In order to disable the legacy attributes, add the following to your Cargo.toml:
[dependencies]
qualifier_attr = { version = "0.2", default-features = false }
Similar crates
License

Licensed under either of Apache License, Version
2.0 or MIT license at your option.


Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in this crate by you, as defined in the Apache-2.0 license, shall
be dual licensed as above, without any additional terms or conditions.

About
Procedural macro attributes for adding "qualifiers" to various items.
Resources
Readme
Activity
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10 stars
Watchers
2 watching
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0 forks
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, '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
qualifier_attr
Latest VersionDownloadsDocumentationLicenseDependency Status
Procedural macro attributes for adding "qualifiers" to various items.
At the moment, the crate supports the following "qualifiers":
  • pub, pub(crate), etc. - visibility and restriction
  • default - default implementations (a feature of specialization)
  • async - asynchronous code, e.g. async fn
  • unsafe - unsafe code, e.g. unsafe fn, unsafe trait
  • const - code that may run at compile time, e.g. const fn
  • extern "ABI" - specifying an ABI, e.g. extern "C" fn
Limitations
Examples
#[macro_use]externcrate qualifier_attr;// We can add a qualifier to a function// with an attribute.#[qualifiers(const)]fnconst_fn() -> u32{42}constCONST_RES:u32 = const_fn();// It's not so impressive on its own,// but with `cfg_attr`, it can be conditional.#[cfg_attr(feature = "extern_c", no_mangle, qualifiers(pub, extern "C"))]fnextern_c_fn() -> u32{42}// It even works with types, imports, and more!mod foo {#[qualifiers(pub)]structFoo{x:i32,y:i32,}}#[qualifiers(pub)]use foo::Foo;// Traits and implementations too!?#[cfg_attr(feature = "unsafe_quux", qualifiers(unsafe))]traitQuux{fnquux_the_thing();}#[cfg_attr(feature = "unsafe_quux", qualifiers(unsafe))]implQuuxforFoo{fnquux_the_thing(){println!("The thing was quuxed.");}}// You can add qualifiers to the fields of a// struct as well with this special attribute.#[field_qualifiers(x(pub), y(pub))]structPoint2{x:i32,y:i32,}#[field_qualifiers(_0(pub), _1(pub), _2(pub))]structPoint3(i32,i32,i32);
Learn more about cfg_attrhere.
Note on legacy attributes
Before version 0.2.0, this crate provided a separate attribute for each kind of item. While this should generally be a small win for compile times, it is generally not justified by the additional complexity. The legacy attributes are still available behind the default legacy_attrs feature flag, but their use is currently discouraged. In order to disable the legacy attributes, add the following to your Cargo.toml:
[dependencies]
qualifier_attr = { version = "0.2", default-features = false }
Similar crates
License

Licensed under either of Apache License, Version
2.0 or MIT license at your option.


Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in this crate by you, as defined in the Apache-2.0 license, shall
be dual licensed as above, without any additional terms or conditions.

About
Procedural macro attributes for adding "qualifiers" to various items.
Resources
Readme
Activity
Stars
10 stars
Watchers
2 watching
Forks
0 forks
Report repository
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Used by
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, '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
qualifier_attr
Latest VersionDownloadsDocumentationLicenseDependency Status
Procedural macro attributes for adding "qualifiers" to various items.
At the moment, the crate supports the following "qualifiers":
  • pub, pub(crate), etc. - visibility and restriction
  • default - default implementations (a feature of specialization)
  • async - asynchronous code, e.g. async fn
  • unsafe - unsafe code, e.g. unsafe fn, unsafe trait
  • const - code that may run at compile time, e.g. const fn
  • extern "ABI" - specifying an ABI, e.g. extern "C" fn
Limitations
Examples
#[macro_use]externcrate qualifier_attr;// We can add a qualifier to a function// with an attribute.#[qualifiers(const)]fnconst_fn() -> u32{42}constCONST_RES:u32 = const_fn();// It's not so impressive on its own,// but with `cfg_attr`, it can be conditional.#[cfg_attr(feature = "extern_c", no_mangle, qualifiers(pub, extern "C"))]fnextern_c_fn() -> u32{42}// It even works with types, imports, and more!mod foo {#[qualifiers(pub)]structFoo{x:i32,y:i32,}}#[qualifiers(pub)]use foo::Foo;// Traits and implementations too!?#[cfg_attr(feature = "unsafe_quux", qualifiers(unsafe))]traitQuux{fnquux_the_thing();}#[cfg_attr(feature = "unsafe_quux", qualifiers(unsafe))]implQuuxforFoo{fnquux_the_thing(){println!("The thing was quuxed.");}}// You can add qualifiers to the fields of a// struct as well with this special attribute.#[field_qualifiers(x(pub), y(pub))]structPoint2{x:i32,y:i32,}#[field_qualifiers(_0(pub), _1(pub), _2(pub))]structPoint3(i32,i32,i32);
Learn more about cfg_attrhere.
Note on legacy attributes
Before version 0.2.0, this crate provided a separate attribute for each kind of item. While this should generally be a small win for compile times, it is generally not justified by the additional complexity. The legacy attributes are still available behind the default legacy_attrs feature flag, but their use is currently discouraged. In order to disable the legacy attributes, add the following to your Cargo.toml:
[dependencies]
qualifier_attr = { version = "0.2", default-features = false }
Similar crates
License

Licensed under either of Apache License, Version
2.0 or MIT license at your option.


Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in this crate by you, as defined in the Apache-2.0 license, shall
be dual licensed as above, without any additional terms or conditions.

About
Procedural macro attributes for adding "qualifiers" to various items.
Resources
Readme
Activity
Stars
10 stars
Watchers
2 watching
Forks
0 forks
Report repository
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Used by
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, '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
qualifier_attr
Latest VersionDownloadsDocumentationLicenseDependency Status
Procedural macro attributes for adding "qualifiers" to various items.
At the moment, the crate supports the following "qualifiers":
  • pub, pub(crate), etc. - visibility and restriction
  • default - default implementations (a feature of specialization)
  • async - asynchronous code, e.g. async fn
  • unsafe - unsafe code, e.g. unsafe fn, unsafe trait
  • const - code that may run at compile time, e.g. const fn
  • extern "ABI" - specifying an ABI, e.g. extern "C" fn
Limitations
Examples
#[macro_use]externcrate qualifier_attr;// We can add a qualifier to a function// with an attribute.#[qualifiers(const)]fnconst_fn() -> u32{42}constCONST_RES:u32 = const_fn();// It's not so impressive on its own,// but with `cfg_attr`, it can be conditional.#[cfg_attr(feature = "extern_c", no_mangle, qualifiers(pub, extern "C"))]fnextern_c_fn() -> u32{42}// It even works with types, imports, and more!mod foo {#[qualifiers(pub)]structFoo{x:i32,y:i32,}}#[qualifiers(pub)]use foo::Foo;// Traits and implementations too!?#[cfg_attr(feature = "unsafe_quux", qualifiers(unsafe))]traitQuux{fnquux_the_thing();}#[cfg_attr(feature = "unsafe_quux", qualifiers(unsafe))]implQuuxforFoo{fnquux_the_thing(){println!("The thing was quuxed.");}}// You can add qualifiers to the fields of a// struct as well with this special attribute.#[field_qualifiers(x(pub), y(pub))]structPoint2{x:i32,y:i32,}#[field_qualifiers(_0(pub), _1(pub), _2(pub))]structPoint3(i32,i32,i32);
Learn more about cfg_attrhere.
Note on legacy attributes
Before version 0.2.0, this crate provided a separate attribute for each kind of item. While this should generally be a small win for compile times, it is generally not justified by the additional complexity. The legacy attributes are still available behind the default legacy_attrs feature flag, but their use is currently discouraged. In order to disable the legacy attributes, add the following to your Cargo.toml:
[dependencies]
qualifier_attr = { version = "0.2", default-features = false }
Similar crates
License

Licensed under either of Apache License, Version
2.0 or MIT license at your option.


Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in this crate by you, as defined in the Apache-2.0 license, shall
be dual licensed as above, without any additional terms or conditions.

About
Procedural macro attributes for adding "qualifiers" to various items.
Resources
Readme
Activity
Stars
10 stars
Watchers
2 watching
Forks
0 forks
Report repository
Releases
Packages
Used by
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
qualifier_attr
Latest VersionDownloadsDocumentationLicenseDependency Status
Procedural macro attributes for adding "qualifiers" to various items.
At the moment, the crate supports the following "qualifiers":
  • pub, pub(crate), etc. - visibility and restriction
  • default - default implementations (a feature of specialization)
  • async - asynchronous code, e.g. async fn
  • unsafe - unsafe code, e.g. unsafe fn, unsafe trait
  • const - code that may run at compile time, e.g. const fn
  • extern "ABI" - specifying an ABI, e.g. extern "C" fn
Limitations
Examples
#[macro_use]externcrate qualifier_attr;// We can add a qualifier to a function// with an attribute.#[qualifiers(const)]fnconst_fn() -> u32{42}constCONST_RES:u32 = const_fn();// It's not so impressive on its own,// but with `cfg_attr`, it can be conditional.#[cfg_attr(feature = "extern_c", no_mangle, qualifiers(pub, extern "C"))]fnextern_c_fn() -> u32{42}// It even works with types, imports, and more!mod foo {#[qualifiers(pub)]structFoo{x:i32,y:i32,}}#[qualifiers(pub)]use foo::Foo;// Traits and implementations too!?#[cfg_attr(feature = "unsafe_quux", qualifiers(unsafe))]traitQuux{fnquux_the_thing();}#[cfg_attr(feature = "unsafe_quux", qualifiers(unsafe))]implQuuxforFoo{fnquux_the_thing(){println!("The thing was quuxed.");}}// You can add qualifiers to the fields of a// struct as well with this special attribute.#[field_qualifiers(x(pub), y(pub))]structPoint2{x:i32,y:i32,}#[field_qualifiers(_0(pub), _1(pub), _2(pub))]structPoint3(i32,i32,i32);
Learn more about cfg_attrhere.
Note on legacy attributes
Before version 0.2.0, this crate provided a separate attribute for each kind of item. While this should generally be a small win for compile times, it is generally not justified by the additional complexity. The legacy attributes are still available behind the default legacy_attrs feature flag, but their use is currently discouraged. In order to disable the legacy attributes, add the following to your Cargo.toml:
[dependencies]
qualifier_attr = { version = "0.2", default-features = false }
Similar crates
License

Licensed under either of Apache License, Version
2.0 or MIT license at your option.


Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in this crate by you, as defined in the Apache-2.0 license, shall
be dual licensed as above, without any additional terms or conditions.

About
Procedural macro attributes for adding "qualifiers" to various items.
Resources
Readme
Activity
Stars
10 stars
Watchers
2 watching
Forks
0 forks
Report repository
Releases
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Used by
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
qualifier_attr
Latest VersionDownloadsDocumentationLicenseDependency Status
Procedural macro attributes for adding "qualifiers" to various items.
At the moment, the crate supports the following "qualifiers":
  • pub, pub(crate), etc. - visibility and restriction
  • default - default implementations (a feature of specialization)
  • async - asynchronous code, e.g. async fn
  • unsafe - unsafe code, e.g. unsafe fn, unsafe trait
  • const - code that may run at compile time, e.g. const fn
  • extern "ABI" - specifying an ABI, e.g. extern "C" fn
Limitations
Examples
#[macro_use]externcrate qualifier_attr;// We can add a qualifier to a function// with an attribute.#[qualifiers(const)]fnconst_fn() -> u32{42}constCONST_RES:u32 = const_fn();// It's not so impressive on its own,// but with `cfg_attr`, it can be conditional.#[cfg_attr(feature = "extern_c", no_mangle, qualifiers(pub, extern "C"))]fnextern_c_fn() -> u32{42}// It even works with types, imports, and more!mod foo {#[qualifiers(pub)]structFoo{x:i32,y:i32,}}#[qualifiers(pub)]use foo::Foo;// Traits and implementations too!?#[cfg_attr(feature = "unsafe_quux", qualifiers(unsafe))]traitQuux{fnquux_the_thing();}#[cfg_attr(feature = "unsafe_quux", qualifiers(unsafe))]implQuuxforFoo{fnquux_the_thing(){println!("The thing was quuxed.");}}// You can add qualifiers to the fields of a// struct as well with this special attribute.#[field_qualifiers(x(pub), y(pub))]structPoint2{x:i32,y:i32,}#[field_qualifiers(_0(pub), _1(pub), _2(pub))]structPoint3(i32,i32,i32);
Learn more about cfg_attrhere.
Note on legacy attributes
Before version 0.2.0, this crate provided a separate attribute for each kind of item. While this should generally be a small win for compile times, it is generally not justified by the additional complexity. The legacy attributes are still available behind the default legacy_attrs feature flag, but their use is currently discouraged. In order to disable the legacy attributes, add the following to your Cargo.toml:
[dependencies]
qualifier_attr = { version = "0.2", default-features = false }
Similar crates
License

Licensed under either of Apache License, Version
2.0 or MIT license at your option.


Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in this crate by you, as defined in the Apache-2.0 license, shall
be dual licensed as above, without any additional terms or conditions.

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Procedural macro attributes for adding "qualifiers" to various items.
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, '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); }
})();
})();

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qualifier_attr
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Procedural macro attributes for adding "qualifiers" to various items.
At the moment, the crate supports the following "qualifiers":
  • pub, pub(crate), etc. - visibility and restriction
  • default - default implementations (a feature of specialization)
  • async - asynchronous code, e.g. async fn
  • unsafe - unsafe code, e.g. unsafe fn, unsafe trait
  • const - code that may run at compile time, e.g. const fn
  • extern "ABI" - specifying an ABI, e.g. extern "C" fn
Limitations
Examples
#[macro_use]externcrate qualifier_attr;// We can add a qualifier to a function// with an attribute.#[qualifiers(const)]fnconst_fn() -> u32{42}constCONST_RES:u32 = const_fn();// It's not so impressive on its own,// but with `cfg_attr`, it can be conditional.#[cfg_attr(feature = "extern_c", no_mangle, qualifiers(pub, extern "C"))]fnextern_c_fn() -> u32{42}// It even works with types, imports, and more!mod foo {#[qualifiers(pub)]structFoo{x:i32,y:i32,}}#[qualifiers(pub)]use foo::Foo;// Traits and implementations too!?#[cfg_attr(feature = "unsafe_quux", qualifiers(unsafe))]traitQuux{fnquux_the_thing();}#[cfg_attr(feature = "unsafe_quux", qualifiers(unsafe))]implQuuxforFoo{fnquux_the_thing(){println!("The thing was quuxed.");}}// You can add qualifiers to the fields of a// struct as well with this special attribute.#[field_qualifiers(x(pub), y(pub))]structPoint2{x:i32,y:i32,}#[field_qualifiers(_0(pub), _1(pub), _2(pub))]structPoint3(i32,i32,i32);
Learn more about cfg_attrhere.
Note on legacy attributes
Before version 0.2.0, this crate provided a separate attribute for each kind of item. While this should generally be a small win for compile times, it is generally not justified by the additional complexity. The legacy attributes are still available behind the default legacy_attrs feature flag, but their use is currently discouraged. In order to disable the legacy attributes, add the following to your Cargo.toml:
[dependencies]
qualifier_attr = { version = "0.2", default-features = false }
Similar crates
License

Licensed under either of Apache License, Version
2.0 or MIT license at your option.


Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in this crate by you, as defined in the Apache-2.0 license, shall
be dual licensed as above, without any additional terms or conditions.

About
Procedural macro attributes for adding "qualifiers" to various items.
Resources
Readme
Activity
Stars
10 stars
Watchers
2 watching
Forks
0 forks
Report repository
Releases
Packages
Used by
Contributors
Languages