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Refactor MIR building for arguments.

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This commit is contained in:
Scott Olson 2015-12-30 06:55:51 -06:00
parent b65277496c
commit f8b61340e3
1 changed files with 14 additions and 18 deletions
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32
src/librustc_mir/build/mod.rs
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@ -138,29 +138,25 @@ impl<'a,'tcx> Builder<'a,'tcx> {
-> BlockAnd<Vec<ArgDecl<'tcx>>>
{
self.in_scope(argument_extent, block, |this| {
let arg_decls = {
let num_implicit_args = implicit_arguments.len();
let implicit_arg_decls = implicit_arguments.into_iter()
.map(|ty| ArgDecl { ty: ty });
// to start, translate the argument patterns and collect the
// argument types.
let explicit_arg_decls =
explicit_arguments
.into_iter()
.enumerate()
.map(|(index, (ty, pattern))| {
let lvalue = Lvalue::Arg((num_implicit_args + index) as u32);
// to start, translate the argument patterns and collect the argument types.
let implicits = implicit_arguments.into_iter().map(|ty| (ty, None));
let explicits = explicit_arguments.into_iter().map(|(ty, pat)| (ty, Some(pat)));
let arg_decls =
implicits
.chain(explicits)
.enumerate()
.map(|(index, (ty, pattern))| {
if let Some(pattern) = pattern {
let lvalue = Lvalue::Arg(index as u32);
let pattern = this.hir.irrefutable_pat(pattern);
unpack!(block = this.lvalue_into_pattern(block,
argument_extent,
pattern,
&lvalue));
ArgDecl { ty: ty }
});
implicit_arg_decls.chain(explicit_arg_decls).collect()
};
}
ArgDecl { ty: ty }
})
.collect();
// start the first basic block and translate the body
unpack!(block = this.ast_block(&Lvalue::ReturnPointer, block, ast_block));