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Implement lowering of if-let guards to MIR

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This commit is contained in:
LeSeulArtichaut 2020-11-13 18:27:27 +01:00
parent bab20800f0
commit f3d4aa6afb
7 changed files with 84 additions and 11 deletions
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4
compiler/rustc_hir/src/hir.rs
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@ -1722,6 +1722,8 @@ pub enum MatchSource {
IfDesugar { contains_else_clause: bool },
/// An `if let _ = _ { .. }` (optionally with `else { .. }`).
IfLetDesugar { contains_else_clause: bool },
/// An `if let _ = _ => { .. }` match guard.
IfLetGuardDesugar,
/// A `while _ { .. }` (which was desugared to a `loop { match _ { .. } }`).
WhileDesugar,
/// A `while let _ = _ { .. }` (which was desugared to a
@ -1740,7 +1742,7 @@ impl MatchSource {
use MatchSource::*;
match self {
Normal => "match",
IfDesugar { .. } | IfLetDesugar { .. } => "if",
IfDesugar { .. } | IfLetDesugar { .. } | IfLetGuardDesugar => "if",
WhileDesugar | WhileLetDesugar => "while",
ForLoopDesugar => "for",
TryDesugar => "?",