From 76502deb53f5b30e0ee7f132ba23f8e31263853c Mon Sep 17 00:00:00 2001
From: Joshua Nelson <jyn514@gmail.com>
Date: Thu, 15 Apr 2021 19:36:25 -0400
Subject: [PATCH] Implement DepTrackingHash for `Option` through blanket impls
 instead of macros

This avoids having to add a new macro call for both the `Option` and the
type itself.
---
 compiler/rustc_session/src/config.rs | 42 +++++++++++++++-------------
 1 file changed, 22 insertions(+), 20 deletions(-)

diff --git a/compiler/rustc_session/src/config.rs b/compiler/rustc_session/src/config.rs
index 52f8b536f4a..49637529234 100644
--- a/compiler/rustc_session/src/config.rs
+++ b/compiler/rustc_session/src/config.rs
@@ -2427,30 +2427,32 @@ fn hash(&self, hasher: &mut DefaultHasher, _: ErrorOutputType) {
         )+};
     }
 
+    impl<T: DepTrackingHash> DepTrackingHash for Option<T> {
+        fn hash(&self, hasher: &mut DefaultHasher, error_format: ErrorOutputType) {
+            match self {
+                Some(x) => {
+                    Hash::hash(&1, hasher);
+                    DepTrackingHash::hash(x, hasher, error_format);
+                }
+                None => Hash::hash(&0, hasher),
+            }
+        }
+    }
+
     impl_dep_tracking_hash_via_hash!(
         bool,
         usize,
+        NonZeroUsize,
         u64,
         String,
         PathBuf,
         lint::Level,
-        Option<bool>,
-        Option<u32>,
-        Option<usize>,
-        Option<NonZeroUsize>,
-        Option<String>,
-        Option<(String, u64)>,
-        Option<Vec<String>>,
-        Option<MergeFunctions>,
-        Option<RelocModel>,
-        Option<CodeModel>,
-        Option<TlsModel>,
-        Option<WasiExecModel>,
-        Option<PanicStrategy>,
-        Option<RelroLevel>,
-        Option<InstrumentCoverage>,
-        Option<lint::Level>,
-        Option<PathBuf>,
+        WasiExecModel,
+        u32,
+        RelocModel,
+        CodeModel,
+        TlsModel,
+        InstrumentCoverage,
         CrateType,
         MergeFunctions,
         PanicStrategy,
@@ -2468,10 +2470,10 @@ fn hash(&self, hasher: &mut DefaultHasher, _: ErrorOutputType) {
         TargetTriple,
         Edition,
         LinkerPluginLto,
-        Option<SplitDebuginfo>,
+        SplitDebuginfo,
         SwitchWithOptPath,
-        Option<SymbolManglingVersion>,
-        Option<SourceFileHashAlgorithm>,
+        SymbolManglingVersion,
+        SourceFileHashAlgorithm,
         TrimmedDefPaths,
     );