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single element record pattern

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This commit is contained in:
Folkert 2021-06-21 22:34:14 +02:00
parent a94f597e1e
commit 2ceb50bd02
1 changed files with 21 additions and 25 deletions
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46
compiler/mono/src/ir.rs
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@ -5631,25 +5631,30 @@ fn store_pattern_help<'a>(
| StrLiteral(_) => { | StrLiteral(_) => {
return StorePattern::NotProductive(stmt); return StorePattern::NotProductive(stmt);
} }
NewtypeDestructure { arguments, .. } => { NewtypeDestructure { arguments, .. } => match arguments.as_slice() {
let mut fields = Vec::with_capacity_in(arguments.len(), env.arena); [single] => {
fields.extend(arguments.iter().map(|x| x.1)); return store_pattern_help(env, procs, layout_cache, &single.0, outer_symbol, stmt);
}
_ => {
let mut fields = Vec::with_capacity_in(arguments.len(), env.arena);
fields.extend(arguments.iter().map(|x| x.1));
let layout = Layout::Struct(fields.into_bump_slice()); let layout = Layout::Struct(fields.into_bump_slice());
let wrapped = Wrapped::from_layout(&layout); let wrapped = Wrapped::from_layout(&layout);
return store_newtype_pattern( return store_newtype_pattern(
env, env,
procs, procs,
layout_cache, layout_cache,
outer_symbol, outer_symbol,
&layout, &layout,
&arguments, &arguments,
wrapped, wrapped,
stmt, stmt,
); );
} }
},
AppliedTag { AppliedTag {
arguments, arguments,
layout, layout,
@ -5798,23 +5803,14 @@ fn store_newtype_pattern<'a>(
) -> StorePattern<'a> { ) -> StorePattern<'a> {
use Pattern::*; use Pattern::*;
let write_tag = false;
let mut arg_layouts = Vec::with_capacity_in(arguments.len(), env.arena); let mut arg_layouts = Vec::with_capacity_in(arguments.len(), env.arena);
let mut is_productive = false; let mut is_productive = false;
if write_tag {
// add an element for the tag discriminant
arg_layouts.push(Layout::Builtin(TAG_SIZE));
}
for (_, layout) in arguments { for (_, layout) in arguments {
arg_layouts.push(*layout); arg_layouts.push(*layout);
} }
for (index, (argument, arg_layout)) in arguments.iter().enumerate().rev() { for (index, (argument, arg_layout)) in arguments.iter().enumerate().rev() {
let index = if write_tag { index + 1 } else { index };
let mut arg_layout = *arg_layout; let mut arg_layout = *arg_layout;
if let Layout::RecursivePointer = arg_layout { if let Layout::RecursivePointer = arg_layout {