ymandel updated this revision to Diff 294348.
ymandel added a comment.
Fixed to use more standard type adaptors. Registration now works.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D88275/new/
https://reviews.llvm.org/D88275
Files:
clang/docs/LibASTMatchersReference.html
clang/include/clang/ASTMatchers/ASTMatchers.h
clang/include/clang/ASTMatchers/ASTMatchersInternal.h
clang/lib/ASTMatchers/ASTMatchFinder.cpp
clang/lib/ASTMatchers/Dynamic/Registry.cpp
clang/unittests/ASTMatchers/ASTMatchersTraversalTest.cpp
Index: clang/unittests/ASTMatchers/ASTMatchersTraversalTest.cpp
===================================================================
--- clang/unittests/ASTMatchers/ASTMatchersTraversalTest.cpp
+++ clang/unittests/ASTMatchers/ASTMatchersTraversalTest.cpp
@@ -3190,6 +3190,26 @@
compoundStmt(hasParent(recordDecl()))));
}
+TEST(HasParentIgnoringImplicit, MatchesExplicitParents) {
+ std::string Input = R"cc(
+ float f() {
+ int x = 3;
+ int y = 3.0;
+ return y;
+ }
+ )cc";
+ EXPECT_TRUE(
+ matches(Input, declRefExpr(hasParentIgnoringImplicit(returnStmt()))));
+ EXPECT_TRUE(
+ matches(Input, floatLiteral(hasParentIgnoringImplicit(varDecl()))));
+ EXPECT_TRUE(
+ matches(Input, integerLiteral(hasParentIgnoringImplicit(varDecl()))));
+
+ // Make sure it only ignores implicit ancestors.
+ EXPECT_TRUE(
+ notMatches(Input, integerLiteral(hasParentIgnoringImplicit(declStmt()))));
+}
+
TEST(HasParent, NoDuplicateParents) {
class HasDuplicateParents : public BoundNodesCallback {
public:
Index: clang/lib/ASTMatchers/Dynamic/Registry.cpp
===================================================================
--- clang/lib/ASTMatchers/Dynamic/Registry.cpp
+++ clang/lib/ASTMatchers/Dynamic/Registry.cpp
@@ -311,6 +311,7 @@
REGISTER_MATCHER(hasOverloadedOperatorName);
REGISTER_MATCHER(hasParameter);
REGISTER_MATCHER(hasParent);
+ REGISTER_MATCHER(hasParentIgnoringImplicit);
REGISTER_MATCHER(hasQualifier);
REGISTER_MATCHER(hasRHS);
REGISTER_MATCHER(hasRangeInit);
Index: clang/lib/ASTMatchers/ASTMatchFinder.cpp
===================================================================
--- clang/lib/ASTMatchers/ASTMatchFinder.cpp
+++ clang/lib/ASTMatchers/ASTMatchFinder.cpp
@@ -544,9 +544,14 @@
// don't invalidate any iterators.
if (ResultCache.size() > MaxMemoizationEntries)
ResultCache.clear();
- if (MatchMode == AncestorMatchMode::AMM_ParentOnly)
+ switch (MatchMode) {
+ case AncestorMatchMode::AMM_ParentOnly:
return matchesParentOf(Node, Matcher, Builder);
- return matchesAnyAncestorOf(Node, Ctx, Matcher, Builder);
+ case AncestorMatchMode::AMM_FirstExplicitOnly:
+ return matchesFirstExplicitAncestorOf(Node, Matcher, Builder);
+ case AncestorMatchMode::AMM_All:
+ return matchesAnyAncestorOf(Node, Ctx, Matcher, Builder);
+ }
}
// Matches all registered matchers on the given node and calls the
@@ -714,6 +719,33 @@
return false;
}
+ // Returns whether the first explicit (`Expr`) ancestor of \p Node matches \p
+ // Matcher. That is, like matchesParentOf but skipping implicit parents.
+ // Unlike matchesAnyAncestorOf there's no memoization: it doesn't save much.
+ bool matchesFirstExplicitAncestorOf(const DynTypedNode &Node,
+ const DynTypedMatcher &Matcher,
+ BoundNodesTreeBuilder *Builder) {
+ for (const auto &Parent : ActiveASTContext->getParents(Node)) {
+ if (const auto *E = Parent.get<clang::Expr>())
+ // If the parent is an implicit node, match on *its* parents
+ // instead. Use DFS, since we expect that expressions are relatively
+ // shallow.
+ if (clang::isa<ImplicitCastExpr>(E) || clang::isa<FullExpr>(E) ||
+ clang::isa<MaterializeTemporaryExpr>(E) ||
+ clang::isa<CXXBindTemporaryExpr>(E)) {
+ if (matchesFirstExplicitAncestorOf(Parent, Matcher, Builder))
+ return true;
+ continue;
+ }
+ BoundNodesTreeBuilder BuilderCopy = *Builder;
+ if (Matcher.matches(Parent, this, &BuilderCopy)) {
+ *Builder = std::move(BuilderCopy);
+ return true;
+ }
+ }
+ return false;
+ }
+
// Returns whether an ancestor of \p Node matches \p Matcher.
//
// The order of matching (which can lead to different nodes being bound in
Index: clang/include/clang/ASTMatchers/ASTMatchersInternal.h
===================================================================
--- clang/include/clang/ASTMatchers/ASTMatchersInternal.h
+++ clang/include/clang/ASTMatchers/ASTMatchersInternal.h
@@ -985,7 +985,11 @@
AMM_All,
/// Direct parent only.
- AMM_ParentOnly
+ AMM_ParentOnly,
+
+ /// Considers the first non-implicit `Expr` ancestor. Intuitively, like
+ /// `ignoringImplicit` for matching parents.
+ AMM_FirstExplicitOnly
};
virtual ~ASTMatchFinder() = default;
@@ -1515,6 +1519,33 @@
}
};
+/// Matches \c Stmt nodes that have an ancestor note that is separated from
+/// `Node` only by implicit expression nodes and matches `ParentMatcher`. We
+/// limit to \c Stmt because implicit expressions only ever contain statements
+/// (expressions, in particular).
+///
+/// \c ParentT must be an AST base type.
+template <typename T, typename ParentT>
+class HasParentIgnoringImplicitMatcher : public MatcherInterface<T> {
+ static_assert(IsBaseType<ParentT>::value,
+ "has-parent-ignoring-implicit only accepts base type matcher");
+ static_assert(std::is_base_of<Stmt, T>::value,
+ "has-parent-ignoring-implict only matches statements");
+
+ const DynTypedMatcher ParentMatcher;
+
+public:
+ explicit HasParentIgnoringImplicitMatcher(
+ const Matcher<ParentT> &ParentMatcher)
+ : ParentMatcher(ParentMatcher) {}
+
+ bool matches(const T &Node, ASTMatchFinder *Finder,
+ BoundNodesTreeBuilder *Builder) const override {
+ return Finder->matchesAncestorOf(Node, this->ParentMatcher, Builder,
+ ASTMatchFinder::AMM_FirstExplicitOnly);
+ }
+};
+
/// Matches nodes of type \c T that have at least one ancestor node of
/// type \c AncestorT for which the given inner matcher matches.
///
Index: clang/include/clang/ASTMatchers/ASTMatchers.h
===================================================================
--- clang/include/clang/ASTMatchers/ASTMatchers.h
+++ clang/include/clang/ASTMatchers/ASTMatchers.h
@@ -3176,6 +3176,23 @@
internal::TypeList<Decl, NestedNameSpecifierLoc, Stmt, TypeLoc>>
hasParent;
+/// Matches \c Stmt nodes that have an ancestor, reachable only through
+/// implicit-expression nodes, that matches the provided matcher.
+///
+/// Given
+/// \code
+/// float f() { return 3; }
+/// \endcode
+/// \c integerLiteral(hasParentIgnoringImplicit(returnStmt())) matches "3",
+/// while \c integerLiteral(hasParent(returnStmt())) does not.
+///
+/// Usable as: Matcher<Stmt>
+extern const internal::ArgumentAdaptingMatcherFunc<
+ internal::HasParentIgnoringImplicitMatcher,
+ internal::TypeList<Decl, NestedNameSpecifierLoc, Stmt, TypeLoc>,
+ internal::TypeList<Stmt>>
+ hasParentIgnoringImplicit;
+
/// Matches AST nodes that have an ancestor that matches the provided
/// matcher.
///
Index: clang/docs/LibASTMatchersReference.html
===================================================================
--- clang/docs/LibASTMatchersReference.html
+++ clang/docs/LibASTMatchersReference.html
@@ -422,7 +422,7 @@
</pre></td></tr>
-<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Decl.html";>Decl</a>></td><td class="name" onclick="toggle('objcIvarDecl0')"><a name="objcIvarDecl0Anchor">objcIvarDecl</a></td><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1ObjCIvarDecl.html";>ObjCIvarDecl</a>>...</td></tr>
+<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Decl.html";>Decl</a>></td><td class="name" onclick="toggle('objcIvarDecl0')"><a name="objcIvarDecl0Anchor">objcIvarDecl</a></td><td>Matcher<ObjCIvarDecl>...</td></tr>
<tr><td colspan="4" class="doc" id="objcIvarDecl0"><pre>Matches Objective-C instance variable declarations.
Example matches _enabled
@@ -447,7 +447,7 @@
</pre></td></tr>
-<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Decl.html";>Decl</a>></td><td class="name" onclick="toggle('objcPropertyDecl0')"><a name="objcPropertyDecl0Anchor">objcPropertyDecl</a></td><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1ObjCPropertyDecl.html";>ObjCPropertyDecl</a>>...</td></tr>
+<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Decl.html";>Decl</a>></td><td class="name" onclick="toggle('objcPropertyDecl0')"><a name="objcPropertyDecl0Anchor">objcPropertyDecl</a></td><td>Matcher<ObjCPropertyDecl>...</td></tr>
<tr><td colspan="4" class="doc" id="objcPropertyDecl0"><pre>Matches Objective-C property declarations.
Example matches enabled
@@ -487,7 +487,7 @@
</pre></td></tr>
-<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Decl.html";>Decl</a>></td><td class="name" onclick="toggle('staticAssertDecl0')"><a name="staticAssertDecl0Anchor">staticAssertDecl</a></td><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1StaticAssertDecl.html";>StaticAssertDecl</a>>...</td></tr>
+<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Decl.html";>Decl</a>></td><td class="name" onclick="toggle('staticAssertDecl0')"><a name="staticAssertDecl0Anchor">staticAssertDecl</a></td><td>Matcher<StaticAssertDecl>...</td></tr>
<tr><td colspan="4" class="doc" id="staticAssertDecl0"><pre>Matches a C++ static_assert declaration.
Example:
@@ -762,7 +762,7 @@
</pre></td></tr>
-<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html";>Stmt</a>></td><td class="name" onclick="toggle('binaryConditionalOperator0')"><a name="binaryConditionalOperator0Anchor">binaryConditionalOperator</a></td><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1BinaryConditionalOperator.html";>BinaryConditionalOperator</a>>...</td></tr>
+<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html";>Stmt</a>></td><td class="name" onclick="toggle('binaryConditionalOperator0')"><a name="binaryConditionalOperator0Anchor">binaryConditionalOperator</a></td><td>Matcher<BinaryConditionalOperator>...</td></tr>
<tr><td colspan="4" class="doc" id="binaryConditionalOperator0"><pre>Matches binary conditional operator expressions (GNU extension).
Example matches a ?: b
@@ -935,7 +935,7 @@
</pre></td></tr>
-<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html";>Stmt</a>></td><td class="name" onclick="toggle('cxxConstCastExpr0')"><a name="cxxConstCastExpr0Anchor">cxxConstCastExpr</a></td><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1CXXConstCastExpr.html";>CXXConstCastExpr</a>>...</td></tr>
+<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html";>Stmt</a>></td><td class="name" onclick="toggle('cxxConstCastExpr0')"><a name="cxxConstCastExpr0Anchor">cxxConstCastExpr</a></td><td>Matcher<CXXConstCastExpr>...</td></tr>
<tr><td colspan="4" class="doc" id="cxxConstCastExpr0"><pre>Matches a const_cast expression.
Example: Matches const_cast<int*>(&r) in
@@ -989,7 +989,7 @@
</pre></td></tr>
-<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html";>Stmt</a>></td><td class="name" onclick="toggle('cxxDynamicCastExpr0')"><a name="cxxDynamicCastExpr0Anchor">cxxDynamicCastExpr</a></td><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1CXXDynamicCastExpr.html";>CXXDynamicCastExpr</a>>...</td></tr>
+<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html";>Stmt</a>></td><td class="name" onclick="toggle('cxxDynamicCastExpr0')"><a name="cxxDynamicCastExpr0Anchor">cxxDynamicCastExpr</a></td><td>Matcher<CXXDynamicCastExpr>...</td></tr>
<tr><td colspan="4" class="doc" id="cxxDynamicCastExpr0"><pre>Matches a dynamic_cast expression.
Example:
@@ -1077,7 +1077,7 @@
</pre></td></tr>
-<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html";>Stmt</a>></td><td class="name" onclick="toggle('cxxReinterpretCastExpr0')"><a name="cxxReinterpretCastExpr0Anchor">cxxReinterpretCastExpr</a></td><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1CXXReinterpretCastExpr.html";>CXXReinterpretCastExpr</a>>...</td></tr>
+<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html";>Stmt</a>></td><td class="name" onclick="toggle('cxxReinterpretCastExpr0')"><a name="cxxReinterpretCastExpr0Anchor">cxxReinterpretCastExpr</a></td><td>Matcher<CXXReinterpretCastExpr>...</td></tr>
<tr><td colspan="4" class="doc" id="cxxReinterpretCastExpr0"><pre>Matches a reinterpret_cast expression.
Either the source expression or the destination type can be matched
@@ -1089,7 +1089,7 @@
</pre></td></tr>
-<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html";>Stmt</a>></td><td class="name" onclick="toggle('cxxStaticCastExpr0')"><a name="cxxStaticCastExpr0Anchor">cxxStaticCastExpr</a></td><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1CXXStaticCastExpr.html";>CXXStaticCastExpr</a>>...</td></tr>
+<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html";>Stmt</a>></td><td class="name" onclick="toggle('cxxStaticCastExpr0')"><a name="cxxStaticCastExpr0Anchor">cxxStaticCastExpr</a></td><td>Matcher<CXXStaticCastExpr>...</td></tr>
<tr><td colspan="4" class="doc" id="cxxStaticCastExpr0"><pre>Matches a C++ static_cast expression.
See also: hasDestinationType
@@ -1241,7 +1241,7 @@
</pre></td></tr>
-<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html";>Stmt</a>></td><td class="name" onclick="toggle('exprWithCleanups0')"><a name="exprWithCleanups0Anchor">exprWithCleanups</a></td><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1ExprWithCleanups.html";>ExprWithCleanups</a>>...</td></tr>
+<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html";>Stmt</a>></td><td class="name" onclick="toggle('exprWithCleanups0')"><a name="exprWithCleanups0Anchor">exprWithCleanups</a></td><td>Matcher<ExprWithCleanups>...</td></tr>
<tr><td colspan="4" class="doc" id="exprWithCleanups0"><pre>Matches expressions that introduce cleanups to be run at the end
of the sub-expression's evaluation.
@@ -1398,7 +1398,7 @@
</pre></td></tr>
-<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html";>Stmt</a>></td><td class="name" onclick="toggle('objcCatchStmt0')"><a name="objcCatchStmt0Anchor">objcCatchStmt</a></td><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1ObjCAtCatchStmt.html";>ObjCAtCatchStmt</a>>...</td></tr>
+<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html";>Stmt</a>></td><td class="name" onclick="toggle('objcCatchStmt0')"><a name="objcCatchStmt0Anchor">objcCatchStmt</a></td><td>Matcher<ObjCAtCatchStmt>...</td></tr>
<tr><td colspan="4" class="doc" id="objcCatchStmt0"><pre>Matches Objective-C @catch statements.
Example matches @catch
@@ -1407,7 +1407,7 @@
</pre></td></tr>
-<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html";>Stmt</a>></td><td class="name" onclick="toggle('objcFinallyStmt0')"><a name="objcFinallyStmt0Anchor">objcFinallyStmt</a></td><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1ObjCAtFinallyStmt.html";>ObjCAtFinallyStmt</a>>...</td></tr>
+<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html";>Stmt</a>></td><td class="name" onclick="toggle('objcFinallyStmt0')"><a name="objcFinallyStmt0Anchor">objcFinallyStmt</a></td><td>Matcher<ObjCAtFinallyStmt>...</td></tr>
<tr><td colspan="4" class="doc" id="objcFinallyStmt0"><pre>Matches Objective-C @finally statements.
Example matches @finally
@@ -1440,14 +1440,14 @@
</pre></td></tr>
-<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html";>Stmt</a>></td><td class="name" onclick="toggle('objcThrowStmt0')"><a name="objcThrowStmt0Anchor">objcThrowStmt</a></td><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1ObjCAtThrowStmt.html";>ObjCAtThrowStmt</a>>...</td></tr>
+<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html";>Stmt</a>></td><td class="name" onclick="toggle('objcThrowStmt0')"><a name="objcThrowStmt0Anchor">objcThrowStmt</a></td><td>Matcher<ObjCAtThrowStmt>...</td></tr>
<tr><td colspan="4" class="doc" id="objcThrowStmt0"><pre>Matches Objective-C statements.
Example matches @throw obj;
</pre></td></tr>
-<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html";>Stmt</a>></td><td class="name" onclick="toggle('objcTryStmt0')"><a name="objcTryStmt0Anchor">objcTryStmt</a></td><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1ObjCAtTryStmt.html";>ObjCAtTryStmt</a>>...</td></tr>
+<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html";>Stmt</a>></td><td class="name" onclick="toggle('objcTryStmt0')"><a name="objcTryStmt0Anchor">objcTryStmt</a></td><td>Matcher<ObjCAtTryStmt>...</td></tr>
<tr><td colspan="4" class="doc" id="objcTryStmt0"><pre>Matches Objective-C @try statements.
Example matches @try
@@ -1470,7 +1470,7 @@
</pre></td></tr>
-<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html";>Stmt</a>></td><td class="name" onclick="toggle('opaqueValueExpr0')"><a name="opaqueValueExpr0Anchor">opaqueValueExpr</a></td><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1OpaqueValueExpr.html";>OpaqueValueExpr</a>>...</td></tr>
+<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Stmt.html";>Stmt</a>></td><td class="name" onclick="toggle('opaqueValueExpr0')"><a name="opaqueValueExpr0Anchor">opaqueValueExpr</a></td><td>Matcher<OpaqueValueExpr>...</td></tr>
<tr><td colspan="4" class="doc" id="opaqueValueExpr0"><pre>Matches opaque value expressions. They are used as helpers
to reference another expressions and can be met
in BinaryConditionalOperators, for example.
@@ -2157,6 +2157,19 @@
</pre></td></tr>
+<tr><td>Matcher<*></td><td class="name" onclick="toggle('hasParentIgnoringImplicit0')"><a name="hasParentIgnoringImplicit0Anchor">hasParentIgnoringImplicit</a></td><td>MatcherT InnerMatcher</td></tr>
+<tr><td colspan="4" class="doc" id="hasParentIgnoringImplicit0"><pre>Matches AST nodes that have an ancestor, reachable only through
+implicit-expression nodes, that matches the provided matcher.
+
+Given
+float f() { return 3; }
+integerLiteral(hasParentIgnoringImplicit(returnStmt())) matches "3",
+while integerLiteral(hasParent(returnStmt())) does not.
+
+Usable as: Any Matcher
+</pre></td></tr>
+
+
<tr><td>Matcher<*></td><td class="name" onclick="toggle('unless0')"><a name="unless0Anchor">unless</a></td><td>Matcher<*></td></tr>
<tr><td colspan="4" class="doc" id="unless0"><pre>Matches if the provided matcher does not match.
@@ -7239,7 +7252,7 @@
</pre></td></tr>
-<tr><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1OpaqueValueExpr.html";>OpaqueValueExpr</a>></td><td class="name" onclick="toggle('hasSourceExpression1')"><a name="hasSourceExpression1Anchor">hasSourceExpression</a></td><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Expr.html";>Expr</a>> InnerMatcher</td></tr>
+<tr><td>Matcher<OpaqueValueExpr></td><td class="name" onclick="toggle('hasSourceExpression1')"><a name="hasSourceExpression1Anchor">hasSourceExpression</a></td><td>Matcher<<a href="https://clang.llvm.org/doxygen/classclang_1_1Expr.html";>Expr</a>> InnerMatcher</td></tr>
<tr><td colspan="4" class="doc" id="hasSourceExpression1"><pre>Matches if the cast's source expression
or opaque value's source expression matches the given matcher.
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