This revision was automatically updated to reflect the committed changes.
Closed by commit rGa8fbd1157deb: [clang-tidy] Ignore concepts in
`misc-redundant-expression` (authored by Izaron).
Changed prior to commit:
https://reviews.llvm.org/D122078?vs=466271&id=466273#toc
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D122078/new/
https://reviews.llvm.org/D122078
Files:
clang-tools-extra/clang-tidy/misc/RedundantExpressionCheck.cpp
clang-tools-extra/docs/ReleaseNotes.rst
clang-tools-extra/test/clang-tidy/checkers/misc/redundant-expression-cxx20.cpp
Index: clang-tools-extra/test/clang-tidy/checkers/misc/redundant-expression-cxx20.cpp
===================================================================
--- /dev/null
+++ clang-tools-extra/test/clang-tidy/checkers/misc/redundant-expression-cxx20.cpp
@@ -0,0 +1,11 @@
+// RUN: clang-tidy %s -checks=-*,misc-redundant-expression -- -std=c++20 | count 0
+
+namespace concepts {
+// redundant expressions inside concepts make sense, ignore them
+template <class I>
+concept TestConcept = requires(I i) {
+ {i - i};
+ {i && i};
+ {i ? i : i};
+};
+} // namespace concepts
Index: clang-tools-extra/docs/ReleaseNotes.rst
===================================================================
--- clang-tools-extra/docs/ReleaseNotes.rst
+++ clang-tools-extra/docs/ReleaseNotes.rst
@@ -164,6 +164,12 @@
:doc:`readability-simplify-boolean-expr <clang-tidy/checks/readability/simplify-boolean-expr>`
when using a C++23 ``if consteval`` statement.
+- Improved :doc:`misc-redundant-expression <clang-tidy/checks/misc-redundant-expression>`
+ check.
+
+ The check now skips concept definitions since redundant expressions still make sense
+ inside them.
+
Removed checks
^^^^^^^^^^^^^^
Index: clang-tools-extra/clang-tidy/misc/RedundantExpressionCheck.cpp
===================================================================
--- clang-tools-extra/clang-tidy/misc/RedundantExpressionCheck.cpp
+++ clang-tools-extra/clang-tidy/misc/RedundantExpressionCheck.cpp
@@ -10,6 +10,7 @@
#include "../utils/Matchers.h"
#include "../utils/OptionsUtils.h"
#include "clang/AST/ASTContext.h"
+#include "clang/AST/ExprConcepts.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/Basic/LLVM.h"
#include "clang/Basic/SourceLocation.h"
@@ -440,6 +441,8 @@
return Node.isIntegerConstantExpr(Finder->getASTContext());
}
+AST_MATCHER(Expr, isRequiresExpr) { return isa<RequiresExpr>(Node); }
+
AST_MATCHER(BinaryOperator, operandsAreEquivalent) {
return areEquivalentExpr(Node.getLHS(), Node.getRHS());
}
@@ -858,6 +861,7 @@
const auto BannedIntegerLiteral =
integerLiteral(expandedByMacro(KnownBannedMacroNames));
+ const auto BannedAncestor = expr(isRequiresExpr());
// Binary with equivalent operands, like (X != 2 && X != 2).
Finder->addMatcher(
@@ -873,7 +877,8 @@
unless(hasType(realFloatingPointType())),
unless(hasEitherOperand(hasType(realFloatingPointType()))),
unless(hasLHS(AnyLiteralExpr)),
- unless(hasDescendant(BannedIntegerLiteral)))
+ unless(hasDescendant(BannedIntegerLiteral)),
+ unless(hasAncestor(BannedAncestor)))
.bind("binary")),
this);
@@ -886,7 +891,8 @@
unless(isInTemplateInstantiation()),
unless(binaryOperatorIsInMacro()),
// TODO: if the banned macros are themselves duplicated
- unless(hasDescendant(BannedIntegerLiteral)))
+ unless(hasDescendant(BannedIntegerLiteral)),
+ unless(hasAncestor(BannedAncestor)))
.bind("nested-duplicates"),
this);
@@ -896,7 +902,8 @@
conditionalOperator(expressionsAreEquivalent(),
// Filter noisy false positives.
unless(conditionalOperatorIsInMacro()),
- unless(isInTemplateInstantiation()))
+ unless(isInTemplateInstantiation()),
+ unless(hasAncestor(BannedAncestor)))
.bind("cond")),
this);
@@ -909,7 +916,8 @@
">=", "&&", "||", "="),
parametersAreEquivalent(),
// Filter noisy false positives.
- unless(isMacro()), unless(isInTemplateInstantiation()))
+ unless(isMacro()), unless(isInTemplateInstantiation()),
+ unless(hasAncestor(BannedAncestor)))
.bind("call")),
this);
@@ -919,7 +927,8 @@
hasAnyOverloadedOperatorName("|", "&", "||", "&&", "^"),
nestedParametersAreEquivalent(), argumentCountIs(2),
// Filter noisy false positives.
- unless(isMacro()), unless(isInTemplateInstantiation()))
+ unless(isMacro()), unless(isInTemplateInstantiation()),
+ unless(hasAncestor(BannedAncestor)))
.bind("nested-duplicates"),
this);
@@ -936,7 +945,8 @@
binaryOperator(hasAnyOperatorName("|", "&")),
integerLiteral())),
hasRHS(integerLiteral())))))
- .bind("logical-bitwise-confusion")))),
+ .bind("logical-bitwise-confusion")),
+ unless(hasAncestor(BannedAncestor)))),
this);
// Match expressions like: (X << 8) & 0xFF
@@ -949,7 +959,8 @@
hasRHS(ignoringParenImpCasts(
integerLiteral().bind("shift-const"))))),
ignoringParenImpCasts(
- integerLiteral().bind("and-const"))))
+ integerLiteral().bind("and-const"))),
+ unless(hasAncestor(BannedAncestor)))
.bind("left-right-shift-confusion")),
this);
@@ -967,7 +978,8 @@
// Match expressions like: x <op> 0xFF == 0xF00.
Finder->addMatcher(
traverse(TK_AsIs, binaryOperator(isComparisonOperator(),
- hasOperands(BinOpCstLeft, CstRight))
+ hasOperands(BinOpCstLeft, CstRight),
+ unless(hasAncestor(BannedAncestor)))
.bind("binop-const-compare-to-const")),
this);
@@ -977,7 +989,8 @@
TK_AsIs,
binaryOperator(isComparisonOperator(),
anyOf(allOf(hasLHS(BinOpCstLeft), hasRHS(SymRight)),
- allOf(hasLHS(SymRight), hasRHS(BinOpCstLeft))))
+ allOf(hasLHS(SymRight), hasRHS(BinOpCstLeft))),
+ unless(hasAncestor(BannedAncestor)))
.bind("binop-const-compare-to-sym")),
this);
@@ -987,7 +1000,8 @@
binaryOperator(isComparisonOperator(), hasLHS(BinOpCstLeft),
hasRHS(BinOpCstRight),
// Already reported as redundant.
- unless(operandsAreEquivalent()))
+ unless(operandsAreEquivalent()),
+ unless(hasAncestor(BannedAncestor)))
.bind("binop-const-compare-to-binop-const")),
this);
@@ -1003,7 +1017,8 @@
binaryOperator(hasAnyOperatorName("||", "&&"),
hasLHS(ComparisonLeft), hasRHS(ComparisonRight),
// Already reported as redundant.
- unless(operandsAreEquivalent()))
+ unless(operandsAreEquivalent()),
+ unless(hasAncestor(BannedAncestor)))
.bind("comparisons-of-symbol-and-const")),
this);
}
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