RS.CLIPPY.DOC_MARKDOWN

Presence of `_`, `::` or camel-case outside backticks in documentation

This checker is a Clippy lint created by The Rust Project Contributors. The documentation shown here is a copy of the original documentation for: doc_markdown. Copyright ©2025 The Rust Team. All rights reserved.

What it does

Checks for the presence of _, :: or camel-case words outside ticks in documentation.

Why is this bad?

Rustdoc supports markdown formatting, _, :: and camel-case probably indicates some code which should be included between ticks. _ can also be used for emphasis in markdown, this lint tries to consider that.

Known problems

Lots of bad docs won't be fixed, what the lint checks for is limited, and there are still false positives. HTML elements and their content are not linted.

In addition, when writing documentation comments, including [] brackets inside a link text would trip the parser. Therefore, documenting link with [SmallVec<[T; INLINE_CAPACITY]>] and then [SmallVec<[T; INLINE_CAPACITY]>]: SmallVec would fail.

Examples

/// Do something with the foo_bar parameter. See also
/// that::other::module::foo.
// ^ `foo_bar` and `that::other::module::foo` should be ticked.
fn doit(foo_bar: usize) {}

// Link text with `[]` brackets should be written as following:
/// Consume the array and return the inner
/// [`SmallVec<[T; INLINE_CAPACITY]>`][SmallVec].
/// [SmallVec]: SmallVec
fn main() {}

Configuration

  • doc-valid-idents: The list of words this lint should not consider as identifiers needing ticks. The value ".." can be used as part of the list to indicate, that the configured values should be appended to the default configuration of Clippy. By default, any configuration will replace the default value. For example:

  • doc-valid-idents = ["ClipPy"] would replace the default list with ["ClipPy"].

  • doc-valid-idents = ["ClipPy", ".."] would append ClipPy to the default list.

    (default: ["KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "MHz", "GHz", "THz", "AccessKit", "CoAP", "CoreFoundation", "CoreGraphics", "CoreText", "DevOps", "Direct2D", "Direct3D", "DirectWrite", "DirectX", "ECMAScript", "GPLv2", "GPLv3", "GitHub", "GitLab", "IPv4", "IPv6", "ClojureScript", "CoffeeScript", "JavaScript", "PostScript", "PureScript", "TypeScript", "WebAssembly", "NaN", "NaNs", "OAuth", "GraphQL", "OCaml", "OpenAL", "OpenDNS", "OpenGL", "OpenMP", "OpenSSH", "OpenSSL", "OpenStreetMap", "OpenTelemetry", "OpenType", "WebGL", "WebGL2", "WebGPU", "WebRTC", "WebSocket", "WebTransport", "WebP", "OpenExr", "YCbCr", "sRGB", "TensorFlow", "TrueType", "iOS", "macOS", "FreeBSD", "NetBSD", "OpenBSD", "TeX", "LaTeX", "BibTeX", "BibLaTeX", "MinGW", "CamelCase"])