https://github.com/one-d-wide created
https://github.com/llvm/llvm-project/pull/148018
Allow AST matches in clang-query to have a trailing comma at the end of matcher
arguments. Makes it nicer to work with queries that span multiple lines.
So, for example, the following is possible:
```clang-query
match namedDecl(
isExpansionInMainFile(),
anyOf(
varDecl().bind("var"),
functionDecl().bind("func"),
# enumDecl().bind("enum"),
),
)
```
CC: @AaronBallman
>From 599243135f75fe0dd629a9078f01dee3fb260cf7 Mon Sep 17 00:00:00 2001
From: "Remy D. Farley" <[email protected]>
Date: Thu, 10 Jul 2025 17:46:14 +0000
Subject: [PATCH] [clang-query] Allow for trailing comma in matchers
---
clang-tools-extra/test/clang-query/trailing-comma.c | 10 ++++++++++
clang/lib/ASTMatchers/Dynamic/Parser.cpp | 10 ++++++++++
2 files changed, 20 insertions(+)
create mode 100644 clang-tools-extra/test/clang-query/trailing-comma.c
diff --git a/clang-tools-extra/test/clang-query/trailing-comma.c
b/clang-tools-extra/test/clang-query/trailing-comma.c
new file mode 100644
index 0000000000000..ecdfd3b8ab6fd
--- /dev/null
+++ b/clang-tools-extra/test/clang-query/trailing-comma.c
@@ -0,0 +1,10 @@
+// RUN: clang-query -c "match \
+// RUN: functionDecl( \
+// RUN: hasName( \
+// RUN: \"foo\", \
+// RUN: ), \
+// RUN: ) \
+// RUN: " %s -- | FileCheck %s
+
+// CHECK: trailing-comma.c:10:1: note: "root" binds here
+void foo(void) {}
diff --git a/clang/lib/ASTMatchers/Dynamic/Parser.cpp
b/clang/lib/ASTMatchers/Dynamic/Parser.cpp
index 8a5ac4d0f9d0c..baac797f09ec3 100644
--- a/clang/lib/ASTMatchers/Dynamic/Parser.cpp
+++ b/clang/lib/ASTMatchers/Dynamic/Parser.cpp
@@ -490,6 +490,11 @@ bool Parser::parseMatcherBuilder(MatcherCtor Ctor, const
TokenInfo &NameToken,
<< CommaToken.Text;
return false;
}
+ // Allow for a trailing , token and possibly a new line.
+ Tokenizer->SkipNewlines();
+ if (Tokenizer->nextTokenKind() == TokenInfo::TK_CloseParen) {
+ continue;
+ }
}
Diagnostics::Context Ctx(Diagnostics::Context::MatcherArg, Error,
@@ -658,6 +663,11 @@ bool Parser::parseMatcherExpressionImpl(const TokenInfo
&NameToken,
<< CommaToken.Text;
return false;
}
+ // Allow for a trailing , token and possibly a new line.
+ Tokenizer->SkipNewlines();
+ if (Tokenizer->nextTokenKind() == TokenInfo::TK_CloseParen) {
+ continue;
+ }
}
Diagnostics::Context Ctx(Diagnostics::Context::MatcherArg, Error,
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