bjoernager/rust
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nix lower_label identity function.

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This commit is contained in:
Mazdak Farrokhzad 2019-12-24 03:52:56 +01:00
parent 52179c56be
commit 70eca998d7
1 changed files with 7 additions and 21 deletions
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28
src/librustc_ast_lowering/expr.rs
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@ -82,11 +82,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
this.lower_expr_while_in_loop_scope(e.span, cond, body, opt_label)
}),
ExprKind::Loop(ref body, opt_label) => self.with_loop_scope(e.id, |this| {
hir::ExprKind::Loop(
this.lower_block(body, false),
this.lower_label(opt_label),
hir::LoopSource::Loop,
)
hir::ExprKind::Loop(this.lower_block(body, false), opt_label, hir::LoopSource::Loop)
}),
ExprKind::TryBlock(ref body) => self.lower_expr_try_block(body),
ExprKind::Match(ref expr, ref arms) => hir::ExprKind::Match(
@ -123,10 +119,9 @@ impl<'hir> LoweringContext<'_, 'hir> {
self.lower_expr_closure(capture_clause, movability, decl, body, fn_decl_span)
}
}
ExprKind::Block(ref blk, opt_label) => hir::ExprKind::Block(
self.lower_block(blk, opt_label.is_some()),
self.lower_label(opt_label),
),
ExprKind::Block(ref blk, opt_label) => {
hir::ExprKind::Block(self.lower_block(blk, opt_label.is_some()), opt_label)
}
ExprKind::Assign(ref el, ref er, span) => {
hir::ExprKind::Assign(self.lower_expr(el), self.lower_expr(er), span)
}
@ -407,11 +402,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
);
// `[opt_ident]: loop { ... }`
hir::ExprKind::Loop(
self.block_expr(self.arena.alloc(match_expr)),
self.lower_label(opt_label),
source,
)
hir::ExprKind::Loop(self.block_expr(self.arena.alloc(match_expr)), opt_label, source)
}
/// Desugar `try { <stmts>; <expr> }` into `{ <stmts>; ::std::ops::Try::from_ok(<expr>) }`,
@ -836,10 +827,6 @@ impl<'hir> LoweringContext<'_, 'hir> {
}
}
fn lower_label(&mut self, label: Option<Label>) -> Option<Label> {
label.map(|label| Label { ident: label.ident })
}
fn lower_loop_destination(&mut self, destination: Option<(NodeId, Label)>) -> hir::Destination {
let target_id = match destination {
Some((id, _)) => {
@ -857,7 +844,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
.unwrap_or(Err(hir::LoopIdError::OutsideLoopScope))
.into(),
};
hir::Destination { label: self.lower_label(destination.map(|(_, label)| label)), target_id }
hir::Destination { label: destination.map(|(_, label)| label), target_id }
}
fn lower_jump_destination(&mut self, id: NodeId, opt_label: Option<Label>) -> hir::Destination {
@ -1100,8 +1087,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
);
// `[opt_ident]: loop { ... }`
let kind =
hir::ExprKind::Loop(loop_block, self.lower_label(opt_label), hir::LoopSource::ForLoop);
let kind = hir::ExprKind::Loop(loop_block, opt_label, hir::LoopSource::ForLoop);
let loop_expr = self.arena.alloc(hir::Expr {
hir_id: self.lower_node_id(e.id),
kind,