[PATCH] D150629: [clang-format] Don't allow template to be preceded by closing brace

[Emilia Kond via Phabricator via cfe-commits]

rymiel created this revision.
rymiel added a project: clang-format.
rymiel added reviewers: HazardyKnusperkeks, owenpan, MyDeveloperDay.
Herald added projects: All, clang.
Herald added a subscriber: cfe-commits.
rymiel requested review of this revision.

This check is similar to the right paren check right below it, but it
doesn't need the overloaded operator check.

This patch prevents brace-initialized objects that are being compared
from being mis-annotated as template parameters.

Fixes https://github.com/llvm/llvm-project/issues/57004


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D150629

Files:
  clang/lib/Format/TokenAnnotator.cpp
  clang/unittests/Format/FormatTest.cpp


Index: clang/unittests/Format/FormatTest.cpp
===================================================================
--- clang/unittests/Format/FormatTest.cpp
+++ clang/unittests/Format/FormatTest.cpp
@@ -10679,6 +10679,7 @@
   // Not template parameters.
   verifyFormat("return a < b && c > d;");
   verifyFormat("a < 0 ? b : a > 0 ? c : d;");
+  verifyFormat("ratio{-1, 2} < ratio{-1, 3} == -1 / 3 > -1 / 2;");
   verifyFormat("void f() {\n"
                "  while (a < b && c > d) {\n"
                "  }\n"
Index: clang/lib/Format/TokenAnnotator.cpp
===================================================================
--- clang/lib/Format/TokenAnnotator.cpp
+++ clang/lib/Format/TokenAnnotator.cpp
@@ -144,6 +144,8 @@
     if (Previous.Previous) {
       if (Previous.Previous->Tok.isLiteral())
         return false;
+      if (Previous.Previous->is(tok::r_brace))
+        return false;
       if (Previous.Previous->is(tok::r_paren) && Contexts.size() > 1 &&
           (!Previous.Previous->MatchingParen ||
            !Previous.Previous->MatchingParen->is(


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