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replace explicit loops with foldr

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This commit is contained in:
Daniel Micay 2013-02-19 21:18:19 -05:00
parent 12b43b274b
commit fa6e3b49bf
1 changed files with 7 additions and 12 deletions
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19
src/librustc/middle/trans/_match.rs
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@ -1369,19 +1369,14 @@ pub fn compile_submatch(bcx: block,
PointerCast(bcx, val, T_opaque_enum_ptr(ccx));
let discrimptr = GEPi(bcx, enumptr, [0u, 0u]);
let mut min_discrim = variants[0].disr_val;
for uint::range(1, variants.len()) |idx| {
if variants[idx].disr_val < min_discrim {
min_discrim = variants[idx].disr_val;
}
}
let mut max_discrim = variants[0].disr_val;
for uint::range(1, variants.len()) |idx| {
if variants[idx].disr_val > max_discrim {
max_discrim = variants[idx].disr_val;
}
}
assert variants.len() > 1;
let min_discrim = do variants.foldr(0) |&x, y| {
int::min(x.disr_val, y)
};
let max_discrim = do variants.foldr(0) |&x, y| {
int::max(x.disr_val, y)
};
test_val = LoadRangeAssert(bcx, discrimptr,
min_discrim as c_ulonglong,