bjoernager/rust
bjoernager/rust
1
Fork 0
Code Activity

Use ExactSizeIterator + TrustedLen instead of num_cases arg for switch

Browse source
This commit is contained in:
bjorn3 2019-03-29 17:23:52 +01:00
parent 56842b2154
commit 35705dee7e
5 changed files with 7 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

6
src/librustc_codegen_llvm/builder.rs
View file

@ -21,6 +21,7 @@ use rustc_codegen_ssa::mir::place::PlaceRef;
use std::borrow::Cow;
use std::ops::{Deref, Range};
use std::ptr;
use std::iter::TrustedLen;
// All Builders must have an llfn associated with them
#[must_use]
@ -169,11 +170,10 @@ impl BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
&mut self,
v: &'ll Value,
else_llbb: &'ll BasicBlock,
num_cases: usize,
cases: impl Iterator<Item = (u128, &'ll BasicBlock)>,
cases: impl ExactSizeIterator<Item = (u128, &'ll BasicBlock)> + TrustedLen,
) {
let switch = unsafe {
llvm::LLVMBuildSwitch(self.llbuilder, v, else_llbb, num_cases as c_uint)
llvm::LLVMBuildSwitch(self.llbuilder, v, else_llbb, cases.len() as c_uint)
};
for (on_val, dest) in cases {
let on_val = self.const_uint_big(self.val_ty(v), on_val);