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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-19 10:09:22 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-19 10:09:22 -0700 |
| commit | f4cdf7ca9a1fdcca413157df19753f388a5a224e (patch) | |
| tree | 60a31895b2446cd7fa27514e8c2843534a0de0da /rust/syn/lifetime.rs | |
| download | linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.tar.gz linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.zip | |
Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-mediagrafted
Pull media updates from Mauro Carvalho Chehab:
- v4l2-core: added ISP statistics support and per-block validation
- v4l2-core: Allow unknown HDR10 white point and luminance
- New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor
- New codec: Milos: VPU v2.0 codec support
- isp driver: gained support for Dreamchip RPPX1 ISP framework
- vsp1 driver: gained support for RZ/T2H and RZ/N2H
- Novalake driver: gained CVS support for new NVL hardware
- dvb-core: fix feed leak on failed DMX_ADD_PID
- several driver fixes, cleanups and minor improvements
* tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits)
media: ipu-bridge: check all DMI entries when overriding sensor rotation
media: v4l2-async: avoid deleting unlinked ASC entry on link error
media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement
media: intel/ipu6: fix async notifier cleanup leak on parse error
media: staging/ipu7: fix async notifier UAF on probe error path
media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path
media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem()
media: rcar-isp: Fix VSPX reference leaks
media: rcar-isp: Release ISPCORE resources
media: i2c: imx415: Release runtime PM reference on VBLANK error
media: i2c: imx415: Return test pattern write errors
media: renesas: vsp1: Declare index variables in for loop statement
media: renesas: vsp1: Make reset control optional to support platforms without a reset line
media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs
media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs
media: nxp: imx8-isi: Add additional 32-bit RGB format support
media: nxp: imx8-isi: Add 16-bit raw Bayer format support
media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams
media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks
media: nxp: imx8-isi: Correct color map between V4L2 and ISI
...
Diffstat (limited to 'rust/syn/lifetime.rs')
| -rw-r--r-- | rust/syn/lifetime.rs | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/rust/syn/lifetime.rs b/rust/syn/lifetime.rs new file mode 100644 index 000000000..24bec7fe9 --- /dev/null +++ b/rust/syn/lifetime.rs @@ -0,0 +1,158 @@ +// SPDX-License-Identifier: Apache-2.0 OR MIT + +#[cfg(feature = "parsing")] +use crate::lookahead; +use proc_macro2::{Ident, Span}; +use std::cmp::Ordering; +use std::fmt::{self, Display}; +use std::hash::{Hash, Hasher}; + +/// A Rust lifetime: `'a`. +/// +/// Lifetime names must conform to the following rules: +/// +/// - Must start with an apostrophe. +/// - Must not consist of just an apostrophe: `'`. +/// - Character after the apostrophe must be `_` or a Unicode code point with +/// the XID_Start property. +/// - All following characters must be Unicode code points with the XID_Continue +/// property. +pub struct Lifetime { + pub apostrophe: Span, + pub ident: Ident, +} + +impl Lifetime { + /// # Panics + /// + /// Panics if the lifetime does not conform to the bulleted rules above. + /// + /// # Invocation + /// + /// ``` + /// # use proc_macro2::Span; + /// # use syn::Lifetime; + /// # + /// # fn f() -> Lifetime { + /// Lifetime::new("'a", Span::call_site()) + /// # } + /// ``` + pub fn new(symbol: &str, span: Span) -> Self { + if !symbol.starts_with('\'') { + panic!( + "lifetime name must start with apostrophe as in \"'a\", got {:?}", + symbol + ); + } + + if symbol == "'" { + panic!("lifetime name must not be empty"); + } + + if !crate::ident::xid_ok(&symbol[1..]) { + panic!("{:?} is not a valid lifetime name", symbol); + } + + Lifetime { + apostrophe: span, + ident: Ident::new(&symbol[1..], span), + } + } + + pub fn span(&self) -> Span { + self.apostrophe + .join(self.ident.span()) + .unwrap_or(self.apostrophe) + } + + pub fn set_span(&mut self, span: Span) { + self.apostrophe = span; + self.ident.set_span(span); + } +} + +impl Display for Lifetime { + fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result { + "'".fmt(formatter)?; + self.ident.fmt(formatter) + } +} + +impl Clone for Lifetime { + fn clone(&self) -> Self { + Lifetime { + apostrophe: self.apostrophe, + ident: self.ident.clone(), + } + } +} + +impl PartialEq for Lifetime { + fn eq(&self, other: &Lifetime) -> bool { + self.ident.eq(&other.ident) + } +} + +impl Eq for Lifetime {} + +impl PartialOrd for Lifetime { + fn partial_cmp(&self, other: &Lifetime) -> Option<Ordering> { + Some(self.cmp(other)) + } +} + +impl Ord for Lifetime { + fn cmp(&self, other: &Lifetime) -> Ordering { + self.ident.cmp(&other.ident) + } +} + +impl Hash for Lifetime { + fn hash<H: Hasher>(&self, h: &mut H) { + self.ident.hash(h); + } +} + +#[cfg(feature = "parsing")] +pub_if_not_doc! { + #[doc(hidden)] + #[allow(non_snake_case)] + pub fn Lifetime(marker: lookahead::TokenMarker) -> Lifetime { + match marker {} + } +} + +#[cfg(feature = "parsing")] +pub(crate) mod parsing { + use crate::error::Result; + use crate::lifetime::Lifetime; + use crate::parse::{Parse, ParseStream}; + + #[cfg_attr(docsrs, doc(cfg(feature = "parsing")))] + impl Parse for Lifetime { + fn parse(input: ParseStream) -> Result<Self> { + input.step(|cursor| { + cursor + .lifetime() + .ok_or_else(|| cursor.error("expected lifetime")) + }) + } + } +} + +#[cfg(feature = "printing")] +mod printing { + use crate::lifetime::Lifetime; + use proc_macro2::{Punct, Spacing, TokenStream}; + use quote::{ToTokens, TokenStreamExt}; + + #[cfg_attr(docsrs, doc(cfg(feature = "printing")))] + impl ToTokens for Lifetime { + fn to_tokens(&self, tokens: &mut TokenStream) { + let mut apostrophe = Punct::new('\'', Spacing::Joint); + apostrophe.set_span(self.apostrophe); + tokens.append(apostrophe); + self.ident.to_tokens(tokens); + } + } +} |
