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[clang-format] Fix a bug in annotating arrows after init braces #119958

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Merged
owenca merged 1 commit into from
Dec 18, 2024
Merged

[clang-format] Fix a bug in annotating arrows after init braces #119958

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3 changes: 2 additions & 1 deletion clang/lib/Format/TokenAnnotator.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2403,7 +2403,8 @@ class AnnotatingParser {
// not auto operator->() -> xxx;
Current.setType(TT_TrailingReturnArrow);
} else if (Current.is(tok::arrow) && Current.Previous &&
Current.Previous->is(tok::r_brace)) {
Current.Previous->is(tok::r_brace) &&
Current.Previous->is(BK_Block)) {
// Concept implicit conversion constraint needs to be treated like
// a trailing return type ... } -> <type>.
Current.setType(TT_TrailingReturnArrow);
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5 changes: 3 additions & 2 deletions clang/lib/Format/UnwrappedLineParser.cpp
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Expand Up @@ -570,8 +570,9 @@ void UnwrappedLineParser::calculateBraceTypes(bool ExpectClassBody) {
NextTok->isOneOf(Keywords.kw_of, Keywords.kw_in,
Keywords.kw_as));
ProbablyBracedList =
ProbablyBracedList || (IsCpp && (PrevTok->Tok.isLiteral() ||
NextTok->is(tok::l_paren)));
ProbablyBracedList ||
(IsCpp && (PrevTok->Tok.isLiteral() ||
NextTok->isOneOf(tok::l_paren, tok::arrow)));

// If there is a comma, semicolon or right paren after the closing
// brace, we assume this is a braced initializer list.
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7 changes: 7 additions & 0 deletions clang/unittests/Format/TokenAnnotatorTest.cpp
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Expand Up @@ -2277,6 +2277,13 @@ TEST_F(TokenAnnotatorTest, UnderstandsTrailingReturnArrow) {
ASSERT_EQ(Tokens.size(), 21u) << Tokens;
EXPECT_TOKEN(Tokens[13], tok::arrow, TT_Unknown);

Tokens = annotate("Class<Type>{foo}->func(arg);");
ASSERT_EQ(Tokens.size(), 14u) << Tokens;
EXPECT_TOKEN(Tokens[4], tok::l_brace, TT_Unknown); // Not FunctionLBrace
EXPECT_BRACE_KIND(Tokens[4], BK_BracedInit);
EXPECT_BRACE_KIND(Tokens[6], BK_BracedInit);
EXPECT_TOKEN(Tokens[7], tok::arrow, TT_Unknown);

auto Style = getLLVMStyle();
Style.StatementAttributeLikeMacros.push_back("emit");
Tokens = annotate("emit foo()->bar;", Style);
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