Re-introduce destructuring assignments
Now that that's landed on the stable compiler.
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@ -10,16 +10,14 @@ static A: assert_no_alloc::AllocDisabler = assert_no_alloc::AllocDisabler;
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/// A Rabin fingerprint based string hash for parameter ID strings.
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/// A Rabin fingerprint based string hash for parameter ID strings.
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pub fn hash_param_id(id: &str) -> u32 {
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pub fn hash_param_id(id: &str) -> u32 {
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let mut overflow;
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let mut overflow2;
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let mut has_overflown = false;
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let mut has_overflown = false;
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let mut hash: u32 = 0;
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let mut hash: u32 = 0;
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for char in id.bytes() {
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for char in id.bytes() {
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// No destructuring assignments on stable Rust yet, somehow that just works on nightly
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(hash, overflow) = hash.overflowing_mul(31);
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// without needing to add a feature attribute
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(hash, overflow2) = hash.overflowing_add(char as u32);
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let (hash2, overflow2) = hash.overflowing_mul(31);
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has_overflown |= overflow || overflow2;
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let (hash3, overflow3) = hash2.overflowing_add(char as u32);
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hash = hash3;
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has_overflown |= overflow2 || overflow3;
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}
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}
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if has_overflown {
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if has_overflown {
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