Update clang-format to v20

closes https://github.com/official-stockfish/Stockfish/pull/6085

No functional change

.clang-format

@@ -9,7 +9,7 @@ AllowAllParametersOfDeclarationOnNextLine: true
 AllowShortCaseLabelsOnASingleLine: false
 AllowShortEnumsOnASingleLine: false
 AllowShortIfStatementsOnASingleLine: false
-AlwaysBreakTemplateDeclarations: Yes
+BreakTemplateDeclarations: Yes
 BasedOnStyle: WebKit
 BitFieldColonSpacing: After
 BinPackParameters: false

.github/workflows/clang-format.yml

@@ -25,11 +25,11 @@ jobs:
           ref: ${{ github.event.pull_request.head.sha }}
 
       - name: Run clang-format style check
-        uses: jidicula/clang-format-action@f62da5e3d3a2d88ff364771d9d938773a618ab5e # @v4.11.0
+        uses: jidicula/clang-format-action@4726374d1aa3c6aecf132e5197e498979588ebc8 # @v4.15.0
         id: clang-format
         continue-on-error: true
         with:
-          clang-format-version: "18"
+          clang-format-version: "20"
           exclude-regex: "incbin"
 
       - name: Comment on PR
@@ -37,9 +37,9 @@ jobs:
         uses: thollander/actions-comment-pull-request@fabd468d3a1a0b97feee5f6b9e499eab0dd903f6 # @v2.5.0
         with:
           message: |
-            clang-format 18 needs to be run on this PR.
+            clang-format 20 needs to be run on this PR.
             If you do not have clang-format installed, the maintainer will run it when merging.
-            For the exact version please see https://packages.ubuntu.com/noble/clang-format-18.
+            For the exact version please see https://packages.ubuntu.com/plucky/clang-format-20.
 
             _(execution **${{ github.run_id }}** / attempt **${{ github.run_attempt }}**)_
           comment_tag: execution

src/Makefile

@@ -163,8 +163,8 @@ lsx = no
 lasx = no
 STRIP = strip
 
-ifneq ($(shell which clang-format-18 2> /dev/null),)
-	CLANG-FORMAT = clang-format-18
+ifneq ($(shell which clang-format-20 2> /dev/null),)
+	CLANG-FORMAT = clang-format-20
 else
 	CLANG-FORMAT = clang-format
 endif

src/nnue/nnue_feature_transformer.h

@@ -122,8 +122,7 @@ using psqt_vec_t = int32x4_t;
     #define vec_add_16(a, b) vaddq_s16(a, b)
     #define vec_sub_16(a, b) vsubq_s16(a, b)
     #define vec_mulhi_16(a, b) vqdmulhq_s16(a, b)
-    #define vec_zero() \
-        vec_t { 0 }
+    #define vec_zero() vec_t{0}
     #define vec_set_16(a) vdupq_n_s16(a)
     #define vec_max_16(a, b) vmaxq_s16(a, b)
     #define vec_min_16(a, b) vminq_s16(a, b)
@@ -133,8 +132,7 @@ using psqt_vec_t = int32x4_t;
     #define vec_store_psqt(a, b) *(a) = (b)
     #define vec_add_psqt_32(a, b) vaddq_s32(a, b)
     #define vec_sub_psqt_32(a, b) vsubq_s32(a, b)
-    #define vec_zero_psqt() \
-        psqt_vec_t { 0 }
+    #define vec_zero_psqt() psqt_vec_t{0}
     #define NumRegistersSIMD 16
     #define MaxChunkSize 16
 

src/thread.h

@@ -164,7 +164,7 @@ class ThreadPool {
     std::vector<std::unique_ptr<Thread>> threads;
     std::vector<NumaIndex>               boundThreadToNumaNode;
 
-    uint64_t accumulate(std::atomic<uint64_t> Search::Worker::*member) const {
+    uint64_t accumulate(std::atomic<uint64_t> Search::Worker::* member) const {
 
         uint64_t sum = 0;
         for (auto&& th : threads)