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Avoid long iterator chain in all_rust_features #163685

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rust-bors merged 1 commit into from
Oct 3, 2026
Merged

Avoid long iterator chain in all_rust_features #163685

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42 changes: 22 additions & 20 deletions compiler/rustc_target/src/target_features.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1062,26 +1062,28 @@ const XTENSA_FEATURES: &[(&str, Stability, ImpliedFeatures)] = &[
///
/// IMPORTANT: If you're adding another feature list above, make sure to add it to this iterator!
pub fn all_rust_features() -> impl Iterator<Item = (&'static str, Stability)> {
std::iter::empty()
.chain(ARM_FEATURES)
.chain(AARCH64_FEATURES)
.chain(X86_FEATURES)
.chain(HEXAGON_FEATURES)
.chain(POWERPC_FEATURES)
.chain(MIPS_FEATURES)
.chain(NVPTX_FEATURES)
.chain(RISCV_FEATURES)
.chain(WASM_FEATURES)
.chain(BPF_FEATURES)
.chain(XTENSA_FEATURES)
.chain(CSKY_FEATURES)
.chain(LOONGARCH_FEATURES)
.chain(IBMZ_FEATURES)
.chain(SPARC_FEATURES)
.chain(M68K_FEATURES)
.chain(AVR_FEATURES)
.cloned()
.map(|(f, s, _)| (f, s))
[
ARM_FEATURES,
AARCH64_FEATURES,
X86_FEATURES,
HEXAGON_FEATURES,
POWERPC_FEATURES,
MIPS_FEATURES,
NVPTX_FEATURES,
RISCV_FEATURES,
WASM_FEATURES,
BPF_FEATURES,
XTENSA_FEATURES,
CSKY_FEATURES,
LOONGARCH_FEATURES,
IBMZ_FEATURES,
SPARC_FEATURES,
M68K_FEATURES,
AVR_FEATURES,
]
.into_iter()
.flatten()
.map(|(f, s, _)| (*f, *s))
}

/// Find which target architectures a feature belongs to.
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