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llvm-project/clang/unittests/ASTMatchers/ASTMatchersNodeTest.cpp

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//== unittests/ASTMatchers/ASTMatchersNodeTest.cpp - AST matcher unit tests ==//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "ASTMatchersTest.h"
#include "clang/AST/PrettyPrinter.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/ASTMatchers/ASTMatchers.h"
#include "clang/Tooling/Tooling.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Support/Host.h"
#include "gtest/gtest.h"
namespace clang {
namespace ast_matchers {
TEST(Finder, DynamicOnlyAcceptsSomeMatchers) {
MatchFinder Finder;
EXPECT_TRUE(Finder.addDynamicMatcher(decl(), nullptr));
EXPECT_TRUE(Finder.addDynamicMatcher(callExpr(), nullptr));
EXPECT_TRUE(Finder.addDynamicMatcher(constantArrayType(hasSize(42)),
nullptr));
// Do not accept non-toplevel matchers.
EXPECT_FALSE(Finder.addDynamicMatcher(isArrow(), nullptr));
EXPECT_FALSE(Finder.addDynamicMatcher(hasName("x"), nullptr));
}
TEST(Decl, MatchesDeclarations) {
EXPECT_TRUE(notMatches("", decl(usingDecl())));
EXPECT_TRUE(matches("namespace x { class X {}; } using x::X;",
decl(usingDecl())));
}
TEST(NameableDeclaration, MatchesVariousDecls) {
DeclarationMatcher NamedX = namedDecl(hasName("X"));
EXPECT_TRUE(matches("typedef int X;", NamedX));
EXPECT_TRUE(matches("int X;", NamedX));
EXPECT_TRUE(matches("class foo { virtual void X(); };", NamedX));
EXPECT_TRUE(matches("void foo() try { } catch(int X) { }", NamedX));
EXPECT_TRUE(matches("void foo() { int X; }", NamedX));
EXPECT_TRUE(matches("namespace X { }", NamedX));
EXPECT_TRUE(matches("enum X { A, B, C };", NamedX));
EXPECT_TRUE(notMatches("#define X 1", NamedX));
}
TEST(NameableDeclaration, REMatchesVariousDecls) {
DeclarationMatcher NamedX = namedDecl(matchesName("::X"));
EXPECT_TRUE(matches("typedef int Xa;", NamedX));
EXPECT_TRUE(matches("int Xb;", NamedX));
EXPECT_TRUE(matches("class foo { virtual void Xc(); };", NamedX));
EXPECT_TRUE(matches("void foo() try { } catch(int Xdef) { }", NamedX));
EXPECT_TRUE(matches("void foo() { int Xgh; }", NamedX));
EXPECT_TRUE(matches("namespace Xij { }", NamedX));
EXPECT_TRUE(matches("enum X { A, B, C };", NamedX));
EXPECT_TRUE(notMatches("#define Xkl 1", NamedX));
DeclarationMatcher StartsWithNo = namedDecl(matchesName("::no"));
EXPECT_TRUE(matches("int no_foo;", StartsWithNo));
EXPECT_TRUE(matches("class foo { virtual void nobody(); };", StartsWithNo));
DeclarationMatcher Abc = namedDecl(matchesName("a.*b.*c"));
EXPECT_TRUE(matches("int abc;", Abc));
EXPECT_TRUE(matches("int aFOObBARc;", Abc));
EXPECT_TRUE(notMatches("int cab;", Abc));
EXPECT_TRUE(matches("int cabc;", Abc));
DeclarationMatcher StartsWithK = namedDecl(matchesName(":k[^:]*$"));
EXPECT_TRUE(matches("int k;", StartsWithK));
EXPECT_TRUE(matches("int kAbc;", StartsWithK));
EXPECT_TRUE(matches("namespace x { int kTest; }", StartsWithK));
EXPECT_TRUE(matches("class C { int k; };", StartsWithK));
EXPECT_TRUE(notMatches("class C { int ckc; };", StartsWithK));
}
TEST(DeclarationMatcher, MatchClass) {
DeclarationMatcher ClassMatcher(recordDecl());
// This passes on Windows only because we explicitly pass -target
// i386-unknown-unknown. If we were to compile with the default target
// triple, we'd want to EXPECT_TRUE if it's Win32 or MSVC.
EXPECT_FALSE(matches("", ClassMatcher));
DeclarationMatcher ClassX = recordDecl(recordDecl(hasName("X")));
EXPECT_TRUE(matches("class X;", ClassX));
EXPECT_TRUE(matches("class X {};", ClassX));
EXPECT_TRUE(matches("template<class T> class X {};", ClassX));
EXPECT_TRUE(notMatches("", ClassX));
}
TEST(DeclarationMatcher, translationUnitDecl) {
const std::string Code = "int MyVar1;\n"
"namespace NameSpace {\n"
"int MyVar2;\n"
"} // namespace NameSpace\n";
EXPECT_TRUE(matches(
Code, varDecl(hasName("MyVar1"), hasDeclContext(translationUnitDecl()))));
EXPECT_FALSE(matches(
Code, varDecl(hasName("MyVar2"), hasDeclContext(translationUnitDecl()))));
EXPECT_TRUE(matches(
Code,
varDecl(hasName("MyVar2"),
hasDeclContext(decl(hasDeclContext(translationUnitDecl()))))));
}
TEST(DeclarationMatcher, LinkageSpecification) {
EXPECT_TRUE(matches("extern \"C\" { void foo() {}; }", linkageSpecDecl()));
EXPECT_TRUE(notMatches("void foo() {};", linkageSpecDecl()));
}
TEST(ClassTemplate, DoesNotMatchClass) {
DeclarationMatcher ClassX = classTemplateDecl(hasName("X"));
EXPECT_TRUE(notMatches("class X;", ClassX));
EXPECT_TRUE(notMatches("class X {};", ClassX));
}
TEST(ClassTemplate, MatchesClassTemplate) {
DeclarationMatcher ClassX = classTemplateDecl(hasName("X"));
EXPECT_TRUE(matches("template<typename T> class X {};", ClassX));
EXPECT_TRUE(matches("class Z { template<class T> class X {}; };", ClassX));
}
TEST(ClassTemplate, DoesNotMatchClassTemplateExplicitSpecialization) {
EXPECT_TRUE(notMatches("template<typename T> class X { };"
"template<> class X<int> { int a; };",
classTemplateDecl(hasName("X"),
hasDescendant(fieldDecl(hasName("a"))))));
}
TEST(ClassTemplate, DoesNotMatchClassTemplatePartialSpecialization) {
EXPECT_TRUE(notMatches("template<typename T, typename U> class X { };"
"template<typename T> class X<T, int> { int a; };",
classTemplateDecl(hasName("X"),
hasDescendant(fieldDecl(hasName("a"))))));
}
TEST(DeclarationMatcher, MatchCudaDecl) {
EXPECT_TRUE(matchesWithCuda("__global__ void f() { }"
"void g() { f<<<1, 2>>>(); }",
cudaKernelCallExpr()));
EXPECT_TRUE(matchesWithCuda("__attribute__((device)) void f() {}",
hasAttr(clang::attr::CUDADevice)));
EXPECT_TRUE(notMatchesWithCuda("void f() {}",
cudaKernelCallExpr()));
EXPECT_FALSE(notMatchesWithCuda("__attribute__((global)) void f() {}",
hasAttr(clang::attr::CUDAGlobal)));
}
TEST(ValueDecl, Matches) {
EXPECT_TRUE(matches("enum EnumType { EnumValue };",
valueDecl(hasType(asString("enum EnumType")))));
EXPECT_TRUE(matches("void FunctionDecl();",
valueDecl(hasType(asString("void (void)")))));
}
TEST(Enum, DoesNotMatchClasses) {
EXPECT_TRUE(notMatches("class X {};", enumDecl(hasName("X"))));
}
TEST(Enum, MatchesEnums) {
EXPECT_TRUE(matches("enum X {};", enumDecl(hasName("X"))));
}
TEST(EnumConstant, Matches) {
DeclarationMatcher Matcher = enumConstantDecl(hasName("A"));
EXPECT_TRUE(matches("enum X{ A };", Matcher));
EXPECT_TRUE(notMatches("enum X{ B };", Matcher));
EXPECT_TRUE(notMatches("enum X {};", Matcher));
}
TEST(Matcher, UnresolvedLookupExpr) {
// FIXME: The test is known to be broken on Windows with delayed template
// parsing.
EXPECT_TRUE(matchesConditionally("template<typename T>"
"T foo() { T a; return a; }"
"template<typename T>"
"void bar() {"
" foo<T>();"
"}",
unresolvedLookupExpr(),
/*ExpectMatch=*/true,
"-fno-delayed-template-parsing"));
}
TEST(Matcher, Call) {
// FIXME: Do we want to overload Call() to directly take
// Matcher<Decl>, too?
StatementMatcher MethodX =
callExpr(hasDeclaration(cxxMethodDecl(hasName("x"))));
EXPECT_TRUE(matches("class Y { void x() { x(); } };", MethodX));
EXPECT_TRUE(notMatches("class Y { void x() {} };", MethodX));
StatementMatcher MethodOnY =
cxxMemberCallExpr(on(hasType(recordDecl(hasName("Y")))));
EXPECT_TRUE(
matches("class Y { public: void x(); }; void z() { Y y; y.x(); }",
MethodOnY));
EXPECT_TRUE(
matches("class Y { public: void x(); }; void z(Y &y) { y.x(); }",
MethodOnY));
EXPECT_TRUE(
notMatches("class Y { public: void x(); }; void z(Y *&y) { y->x(); }",
MethodOnY));
EXPECT_TRUE(
notMatches("class Y { public: void x(); }; void z(Y y[]) { y->x(); }",
MethodOnY));
EXPECT_TRUE(
notMatches("class Y { public: void x(); }; void z() { Y *y; y->x(); }",
MethodOnY));
StatementMatcher MethodOnYPointer =
cxxMemberCallExpr(on(hasType(pointsTo(recordDecl(hasName("Y"))))));
EXPECT_TRUE(
matches("class Y { public: void x(); }; void z() { Y *y; y->x(); }",
MethodOnYPointer));
EXPECT_TRUE(
matches("class Y { public: void x(); }; void z(Y *&y) { y->x(); }",
MethodOnYPointer));
EXPECT_TRUE(
matches("class Y { public: void x(); }; void z(Y y[]) { y->x(); }",
MethodOnYPointer));
EXPECT_TRUE(
notMatches("class Y { public: void x(); }; void z() { Y y; y.x(); }",
MethodOnYPointer));
EXPECT_TRUE(
notMatches("class Y { public: void x(); }; void z(Y &y) { y.x(); }",
MethodOnYPointer));
}
TEST(Matcher, Lambda) {
EXPECT_TRUE(matches("auto f = [] (int i) { return i; };",
lambdaExpr()));
}
TEST(Matcher, ForRange) {
EXPECT_TRUE(matches("int as[] = { 1, 2, 3 };"
"void f() { for (auto &a : as); }",
cxxForRangeStmt()));
EXPECT_TRUE(notMatches("void f() { for (int i; i<5; ++i); }",
cxxForRangeStmt()));
}
TEST(Matcher, SubstNonTypeTemplateParm) {
EXPECT_FALSE(matches("template<int N>\n"
"struct A { static const int n = 0; };\n"
"struct B : public A<42> {};",
substNonTypeTemplateParmExpr()));
EXPECT_TRUE(matches("template<int N>\n"
"struct A { static const int n = N; };\n"
"struct B : public A<42> {};",
substNonTypeTemplateParmExpr()));
}
TEST(Matcher, NonTypeTemplateParmDecl) {
EXPECT_TRUE(matches("template <int N> void f();",
nonTypeTemplateParmDecl(hasName("N"))));
EXPECT_TRUE(
notMatches("template <typename T> void f();", nonTypeTemplateParmDecl()));
}
TEST(Matcher, templateTypeParmDecl) {
EXPECT_TRUE(matches("template <typename T> void f();",
templateTypeParmDecl(hasName("T"))));
EXPECT_TRUE(
notMatches("template <int N> void f();", templateTypeParmDecl()));
}
TEST(Matcher, UserDefinedLiteral) {
EXPECT_TRUE(matches("constexpr char operator \"\" _inc (const char i) {"
" return i + 1;"
"}"
"char c = 'a'_inc;",
userDefinedLiteral()));
}
TEST(Matcher, FlowControl) {
EXPECT_TRUE(matches("void f() { while(true) { break; } }", breakStmt()));
EXPECT_TRUE(matches("void f() { while(true) { continue; } }",
continueStmt()));
EXPECT_TRUE(matches("void f() { goto FOO; FOO: ;}", gotoStmt()));
EXPECT_TRUE(matches("void f() { goto FOO; FOO: ;}",
labelStmt(
hasDeclaration(
labelDecl(hasName("FOO"))))));
EXPECT_TRUE(matches("void f() { FOO: ; void *ptr = &&FOO; goto *ptr; }",
addrLabelExpr()));
EXPECT_TRUE(matches("void f() { return; }", returnStmt()));
}
TEST(Matcher, OverloadedOperatorCall) {
StatementMatcher OpCall = cxxOperatorCallExpr();
// Unary operator
EXPECT_TRUE(matches("class Y { }; "
"bool operator!(Y x) { return false; }; "
"Y y; bool c = !y;", OpCall));
// No match -- special operators like "new", "delete"
// FIXME: operator new takes size_t, for which we need stddef.h, for which
// we need to figure out include paths in the test.
// EXPECT_TRUE(NotMatches("#include <stddef.h>\n"
// "class Y { }; "
// "void *operator new(size_t size) { return 0; } "
// "Y *y = new Y;", OpCall));
EXPECT_TRUE(notMatches("class Y { }; "
"void operator delete(void *p) { } "
"void a() {Y *y = new Y; delete y;}", OpCall));
// Binary operator
EXPECT_TRUE(matches("class Y { }; "
"bool operator&&(Y x, Y y) { return true; }; "
"Y a; Y b; bool c = a && b;",
OpCall));
// No match -- normal operator, not an overloaded one.
EXPECT_TRUE(notMatches("bool x = true, y = true; bool t = x && y;", OpCall));
EXPECT_TRUE(notMatches("int t = 5 << 2;", OpCall));
}
TEST(Matcher, ThisPointerType) {
StatementMatcher MethodOnY =
cxxMemberCallExpr(thisPointerType(recordDecl(hasName("Y"))));
EXPECT_TRUE(
matches("class Y { public: void x(); }; void z() { Y y; y.x(); }",
MethodOnY));
EXPECT_TRUE(
matches("class Y { public: void x(); }; void z(Y &y) { y.x(); }",
MethodOnY));
EXPECT_TRUE(
matches("class Y { public: void x(); }; void z(Y *&y) { y->x(); }",
MethodOnY));
EXPECT_TRUE(
matches("class Y { public: void x(); }; void z(Y y[]) { y->x(); }",
MethodOnY));
EXPECT_TRUE(
matches("class Y { public: void x(); }; void z() { Y *y; y->x(); }",
MethodOnY));
EXPECT_TRUE(matches(
"class Y {"
" public: virtual void x();"
"};"
"class X : public Y {"
" public: virtual void x();"
"};"
"void z() { X *x; x->Y::x(); }", MethodOnY));
}
TEST(Matcher, VariableUsage) {
StatementMatcher Reference =
declRefExpr(to(
varDecl(hasInitializer(
cxxMemberCallExpr(thisPointerType(recordDecl(hasName("Y"))))))));
EXPECT_TRUE(matches(
"class Y {"
" public:"
" bool x() const;"
"};"
"void z(const Y &y) {"
" bool b = y.x();"
" if (b) {}"
"}", Reference));
EXPECT_TRUE(notMatches(
"class Y {"
" public:"
" bool x() const;"
"};"
"void z(const Y &y) {"
" bool b = y.x();"
"}", Reference));
}
TEST(Matcher, CalledVariable) {
StatementMatcher CallOnVariableY =
cxxMemberCallExpr(on(declRefExpr(to(varDecl(hasName("y"))))));
EXPECT_TRUE(matches(
"class Y { public: void x() { Y y; y.x(); } };", CallOnVariableY));
EXPECT_TRUE(matches(
"class Y { public: void x() const { Y y; y.x(); } };", CallOnVariableY));
EXPECT_TRUE(matches(
"class Y { public: void x(); };"
"class X : public Y { void z() { X y; y.x(); } };", CallOnVariableY));
EXPECT_TRUE(matches(
"class Y { public: void x(); };"
"class X : public Y { void z() { X *y; y->x(); } };", CallOnVariableY));
EXPECT_TRUE(notMatches(
"class Y { public: void x(); };"
"class X : public Y { void z() { unsigned long y; ((X*)y)->x(); } };",
CallOnVariableY));
}
TEST(UnaryExprOrTypeTraitExpr, MatchesSizeOfAndAlignOf) {
EXPECT_TRUE(matches("void x() { int a = sizeof(a); }",
unaryExprOrTypeTraitExpr()));
EXPECT_TRUE(notMatches("void x() { int a = sizeof(a); }",
alignOfExpr(anything())));
// FIXME: Uncomment once alignof is enabled.
// EXPECT_TRUE(matches("void x() { int a = alignof(a); }",
// unaryExprOrTypeTraitExpr()));
// EXPECT_TRUE(notMatches("void x() { int a = alignof(a); }",
// sizeOfExpr()));
}
TEST(MemberExpression, DoesNotMatchClasses) {
EXPECT_TRUE(notMatches("class Y { void x() {} };", memberExpr()));
}
TEST(MemberExpression, MatchesMemberFunctionCall) {
EXPECT_TRUE(matches("class Y { void x() { x(); } };", memberExpr()));
}
TEST(MemberExpression, MatchesVariable) {
EXPECT_TRUE(
matches("class Y { void x() { this->y; } int y; };", memberExpr()));
EXPECT_TRUE(
matches("class Y { void x() { y; } int y; };", memberExpr()));
EXPECT_TRUE(
matches("class Y { void x() { Y y; y.y; } int y; };", memberExpr()));
}
TEST(MemberExpression, MatchesStaticVariable) {
EXPECT_TRUE(matches("class Y { void x() { this->y; } static int y; };",
memberExpr()));
EXPECT_TRUE(notMatches("class Y { void x() { y; } static int y; };",
memberExpr()));
EXPECT_TRUE(notMatches("class Y { void x() { Y::y; } static int y; };",
memberExpr()));
}
TEST(Function, MatchesFunctionDeclarations) {
StatementMatcher CallFunctionF = callExpr(callee(functionDecl(hasName("f"))));
EXPECT_TRUE(matches("void f() { f(); }", CallFunctionF));
EXPECT_TRUE(notMatches("void f() { }", CallFunctionF));
if (llvm::Triple(llvm::sys::getDefaultTargetTriple()).getOS() !=
llvm::Triple::Win32) {
// FIXME: Make this work for MSVC.
// Dependent contexts, but a non-dependent call.
EXPECT_TRUE(matches("void f(); template <int N> void g() { f(); }",
CallFunctionF));
EXPECT_TRUE(
matches("void f(); template <int N> struct S { void g() { f(); } };",
CallFunctionF));
}
// Depedent calls don't match.
EXPECT_TRUE(
notMatches("void f(int); template <typename T> void g(T t) { f(t); }",
CallFunctionF));
EXPECT_TRUE(
notMatches("void f(int);"
"template <typename T> struct S { void g(T t) { f(t); } };",
CallFunctionF));
EXPECT_TRUE(matches("void f(...);", functionDecl(isVariadic())));
EXPECT_TRUE(notMatches("void f(int);", functionDecl(isVariadic())));
EXPECT_TRUE(notMatches("template <typename... Ts> void f(Ts...);",
functionDecl(isVariadic())));
EXPECT_TRUE(notMatches("void f();", functionDecl(isVariadic())));
EXPECT_TRUE(notMatchesC("void f();", functionDecl(isVariadic())));
EXPECT_TRUE(matches("void f(...);", functionDecl(parameterCountIs(0))));
EXPECT_TRUE(matchesC("void f();", functionDecl(parameterCountIs(0))));
EXPECT_TRUE(matches("void f(int, ...);", functionDecl(parameterCountIs(1))));
}
TEST(FunctionTemplate, MatchesFunctionTemplateDeclarations) {
EXPECT_TRUE(
matches("template <typename T> void f(T t) {}",
functionTemplateDecl(hasName("f"))));
}
TEST(FunctionTemplate, DoesNotMatchFunctionDeclarations) {
EXPECT_TRUE(
notMatches("void f(double d); void f(int t) {}",
functionTemplateDecl(hasName("f"))));
}
TEST(FunctionTemplate, DoesNotMatchFunctionTemplateSpecializations) {
EXPECT_TRUE(
notMatches("void g(); template <typename T> void f(T t) {}"
"template <> void f(int t) { g(); }",
functionTemplateDecl(hasName("f"),
hasDescendant(declRefExpr(to(
functionDecl(hasName("g"))))))));
}
TEST(Matcher, MatchesClassTemplateSpecialization) {
EXPECT_TRUE(matches("template<typename T> struct A {};"
"template<> struct A<int> {};",
classTemplateSpecializationDecl()));
EXPECT_TRUE(matches("template<typename T> struct A {}; A<int> a;",
classTemplateSpecializationDecl()));
EXPECT_TRUE(notMatches("template<typename T> struct A {};",
classTemplateSpecializationDecl()));
}
TEST(DeclaratorDecl, MatchesDeclaratorDecls) {
EXPECT_TRUE(matches("int x;", declaratorDecl()));
EXPECT_TRUE(notMatches("class A {};", declaratorDecl()));
}
TEST(ParmVarDecl, MatchesParmVars) {
EXPECT_TRUE(matches("void f(int x);", parmVarDecl()));
EXPECT_TRUE(notMatches("void f();", parmVarDecl()));
}
TEST(Matcher, ConstructorCall) {
StatementMatcher Constructor = cxxConstructExpr();
EXPECT_TRUE(
matches("class X { public: X(); }; void x() { X x; }", Constructor));
EXPECT_TRUE(
matches("class X { public: X(); }; void x() { X x = X(); }",
Constructor));
EXPECT_TRUE(
matches("class X { public: X(int); }; void x() { X x = 0; }",
Constructor));
EXPECT_TRUE(matches("class X {}; void x(int) { X x; }", Constructor));
}
TEST(Match, ConstructorInitializers) {
EXPECT_TRUE(matches("class C { int i; public: C(int ii) : i(ii) {} };",
cxxCtorInitializer(forField(hasName("i")))));
}
TEST(Matcher, ThisExpr) {
EXPECT_TRUE(
matches("struct X { int a; int f () { return a; } };", cxxThisExpr()));
EXPECT_TRUE(
notMatches("struct X { int f () { int a; return a; } };", cxxThisExpr()));
}
TEST(Matcher, BindTemporaryExpression) {
StatementMatcher TempExpression = cxxBindTemporaryExpr();
std::string ClassString = "class string { public: string(); ~string(); }; ";
EXPECT_TRUE(
matches(ClassString +
"string GetStringByValue();"
"void FunctionTakesString(string s);"
"void run() { FunctionTakesString(GetStringByValue()); }",
TempExpression));
EXPECT_TRUE(
notMatches(ClassString +
"string* GetStringPointer(); "
"void FunctionTakesStringPtr(string* s);"
"void run() {"
" string* s = GetStringPointer();"
" FunctionTakesStringPtr(GetStringPointer());"
" FunctionTakesStringPtr(s);"
"}",
TempExpression));
EXPECT_TRUE(
notMatches("class no_dtor {};"
"no_dtor GetObjByValue();"
"void ConsumeObj(no_dtor param);"
"void run() { ConsumeObj(GetObjByValue()); }",
TempExpression));
}
TEST(MaterializeTemporaryExpr, MatchesTemporary) {
std::string ClassString =
"class string { public: string(); int length(); }; ";
EXPECT_TRUE(
matches(ClassString +
"string GetStringByValue();"
"void FunctionTakesString(string s);"
"void run() { FunctionTakesString(GetStringByValue()); }",
materializeTemporaryExpr()));
EXPECT_TRUE(
notMatches(ClassString +
"string* GetStringPointer(); "
"void FunctionTakesStringPtr(string* s);"
"void run() {"
" string* s = GetStringPointer();"
" FunctionTakesStringPtr(GetStringPointer());"
" FunctionTakesStringPtr(s);"
"}",
materializeTemporaryExpr()));
EXPECT_TRUE(
matches(ClassString +
"string GetStringByValue();"
"void run() { int k = GetStringByValue().length(); }",
materializeTemporaryExpr()));
EXPECT_TRUE(
notMatches(ClassString +
"string GetStringByValue();"
"void run() { GetStringByValue(); }",
materializeTemporaryExpr()));
}
TEST(Matcher, NewExpression) {
StatementMatcher New = cxxNewExpr();
EXPECT_TRUE(matches("class X { public: X(); }; void x() { new X; }", New));
EXPECT_TRUE(
matches("class X { public: X(); }; void x() { new X(); }", New));
EXPECT_TRUE(
matches("class X { public: X(int); }; void x() { new X(0); }", New));
EXPECT_TRUE(matches("class X {}; void x(int) { new X; }", New));
}
TEST(Matcher, DeleteExpression) {
EXPECT_TRUE(matches("struct A {}; void f(A* a) { delete a; }",
cxxDeleteExpr()));
}
TEST(Matcher, DefaultArgument) {
StatementMatcher Arg = cxxDefaultArgExpr();
EXPECT_TRUE(matches("void x(int, int = 0) { int y; x(y); }", Arg));
EXPECT_TRUE(
matches("class X { void x(int, int = 0) { int y; x(y); } };", Arg));
EXPECT_TRUE(notMatches("void x(int, int = 0) { int y; x(y, 0); }", Arg));
}
TEST(Matcher, StringLiterals) {
StatementMatcher Literal = stringLiteral();
EXPECT_TRUE(matches("const char *s = \"string\";", Literal));
// wide string
EXPECT_TRUE(matches("const wchar_t *s = L\"string\";", Literal));
// with escaped characters
EXPECT_TRUE(matches("const char *s = \"\x05five\";", Literal));
// no matching -- though the data type is the same, there is no string literal
EXPECT_TRUE(notMatches("const char s[1] = {'a'};", Literal));
}
TEST(Matcher, CharacterLiterals) {
StatementMatcher CharLiteral = characterLiteral();
EXPECT_TRUE(matches("const char c = 'c';", CharLiteral));
// wide character
EXPECT_TRUE(matches("const char c = L'c';", CharLiteral));
// wide character, Hex encoded, NOT MATCHED!
EXPECT_TRUE(notMatches("const wchar_t c = 0x2126;", CharLiteral));
EXPECT_TRUE(notMatches("const char c = 0x1;", CharLiteral));
}
TEST(Matcher, IntegerLiterals) {
StatementMatcher HasIntLiteral = integerLiteral();
EXPECT_TRUE(matches("int i = 10;", HasIntLiteral));
EXPECT_TRUE(matches("int i = 0x1AB;", HasIntLiteral));
EXPECT_TRUE(matches("int i = 10L;", HasIntLiteral));
EXPECT_TRUE(matches("int i = 10U;", HasIntLiteral));
// Non-matching cases (character literals, float and double)
EXPECT_TRUE(notMatches("int i = L'a';",
HasIntLiteral)); // this is actually a character
// literal cast to int
EXPECT_TRUE(notMatches("int i = 'a';", HasIntLiteral));
EXPECT_TRUE(notMatches("int i = 1e10;", HasIntLiteral));
EXPECT_TRUE(notMatches("int i = 10.0;", HasIntLiteral));
}
TEST(Matcher, FloatLiterals) {
StatementMatcher HasFloatLiteral = floatLiteral();
EXPECT_TRUE(matches("float i = 10.0;", HasFloatLiteral));
EXPECT_TRUE(matches("float i = 10.0f;", HasFloatLiteral));
EXPECT_TRUE(matches("double i = 10.0;", HasFloatLiteral));
EXPECT_TRUE(matches("double i = 10.0L;", HasFloatLiteral));
EXPECT_TRUE(matches("double i = 1e10;", HasFloatLiteral));
EXPECT_TRUE(matches("double i = 5.0;", floatLiteral(equals(5.0))));
EXPECT_TRUE(matches("double i = 5.0;", floatLiteral(equals(5.0f))));
EXPECT_TRUE(
matches("double i = 5.0;", floatLiteral(equals(llvm::APFloat(5.0)))));
EXPECT_TRUE(notMatches("float i = 10;", HasFloatLiteral));
EXPECT_TRUE(notMatches("double i = 5.0;", floatLiteral(equals(6.0))));
EXPECT_TRUE(notMatches("double i = 5.0;", floatLiteral(equals(6.0f))));
EXPECT_TRUE(
notMatches("double i = 5.0;", floatLiteral(equals(llvm::APFloat(6.0)))));
}
TEST(Matcher, NullPtrLiteral) {
EXPECT_TRUE(matches("int* i = nullptr;", cxxNullPtrLiteralExpr()));
}
TEST(Matcher, GNUNullExpr) {
EXPECT_TRUE(matches("int* i = __null;", gnuNullExpr()));
}
TEST(Matcher, AtomicExpr) {
EXPECT_TRUE(matches("void foo() { int *ptr; __atomic_load_n(ptr, 1); }",
atomicExpr()));
}
TEST(Matcher, Initializers) {
const char *ToMatch = "void foo() { struct point { double x; double y; };"
" struct point ptarray[10] = "
" { [2].y = 1.0, [2].x = 2.0, [0].x = 1.0 }; }";
EXPECT_TRUE(matchesConditionally(
ToMatch,
initListExpr(
has(
cxxConstructExpr(
requiresZeroInitialization())),
has(
initListExpr(
hasType(asString("struct point")),
has(floatLiteral(equals(1.0))),
has(implicitValueInitExpr(
hasType(asString("double")))))),
has(
initListExpr(
hasType(asString("struct point")),
has(floatLiteral(equals(2.0))),
has(floatLiteral(equals(1.0)))))
), true, "-std=gnu++98"));
EXPECT_TRUE(matchesC99(ToMatch,
initListExpr(
hasSyntacticForm(
initListExpr(
has(
designatedInitExpr(
designatorCountIs(2),
has(floatLiteral(
equals(1.0))),
has(integerLiteral(
equals(2))))),
has(
designatedInitExpr(
designatorCountIs(2),
has(floatLiteral(
equals(2.0))),
has(integerLiteral(
equals(2))))),
has(
designatedInitExpr(
designatorCountIs(2),
has(floatLiteral(
equals(1.0))),
has(integerLiteral(
equals(0)))))
)))));
}
TEST(Matcher, ParenListExpr) {
EXPECT_TRUE(
matches("template<typename T> class foo { void bar() { foo X(*this); } };"
"template class foo<int>;",
varDecl(hasInitializer(parenListExpr(has(unaryOperator()))))));
}
TEST(Matcher, StmtExpr) {
EXPECT_TRUE(matches("void declToImport() { int C = ({int X=4; X;}); }",
varDecl(hasInitializer(stmtExpr()))));
}
TEST(Matcher, ImportPredefinedExpr) {
// __func__ expands as StringLiteral("foo")
EXPECT_TRUE(matches("void foo() { __func__; }",
predefinedExpr(
hasType(asString("const char [4]")),
has(stringLiteral()))));
}
TEST(Matcher, AsmStatement) {
EXPECT_TRUE(matches("void foo() { __asm(\"mov al, 2\"); }", asmStmt()));
}
TEST(Matcher, Conditions) {
StatementMatcher Condition =
ifStmt(hasCondition(cxxBoolLiteral(equals(true))));
EXPECT_TRUE(matches("void x() { if (true) {} }", Condition));
EXPECT_TRUE(notMatches("void x() { if (false) {} }", Condition));
EXPECT_TRUE(notMatches("void x() { bool a = true; if (a) {} }", Condition));
EXPECT_TRUE(notMatches("void x() { if (true || false) {} }", Condition));
EXPECT_TRUE(notMatches("void x() { if (1) {} }", Condition));
}
TEST(Matcher, ConditionalOperator) {
StatementMatcher Conditional = conditionalOperator(
hasCondition(cxxBoolLiteral(equals(true))),
hasTrueExpression(cxxBoolLiteral(equals(false))));
EXPECT_TRUE(matches("void x() { true ? false : true; }", Conditional));
EXPECT_TRUE(notMatches("void x() { false ? false : true; }", Conditional));
EXPECT_TRUE(notMatches("void x() { true ? true : false; }", Conditional));
StatementMatcher ConditionalFalse = conditionalOperator(
hasFalseExpression(cxxBoolLiteral(equals(false))));
EXPECT_TRUE(matches("void x() { true ? true : false; }", ConditionalFalse));
EXPECT_TRUE(
notMatches("void x() { true ? false : true; }", ConditionalFalse));
EXPECT_TRUE(matches("void x() { true ? true : false; }", ConditionalFalse));
EXPECT_TRUE(
notMatches("void x() { true ? false : true; }", ConditionalFalse));
}
TEST(Matcher, BinaryConditionalOperator) {
StatementMatcher AlwaysOne = binaryConditionalOperator(
hasCondition(implicitCastExpr(
has(
opaqueValueExpr(
hasSourceExpression((integerLiteral(equals(1)))))))),
hasFalseExpression(integerLiteral(equals(0))));
EXPECT_TRUE(matches("void x() { 1 ?: 0; }", AlwaysOne));
StatementMatcher FourNotFive = binaryConditionalOperator(
hasTrueExpression(opaqueValueExpr(
hasSourceExpression((integerLiteral(equals(4)))))),
hasFalseExpression(integerLiteral(equals(5))));
EXPECT_TRUE(matches("void x() { 4 ?: 5; }", FourNotFive));
}
TEST(ArraySubscriptMatchers, ArraySubscripts) {
EXPECT_TRUE(matches("int i[2]; void f() { i[1] = 1; }",
arraySubscriptExpr()));
EXPECT_TRUE(notMatches("int i; void f() { i = 1; }",
arraySubscriptExpr()));
}
TEST(For, FindsForLoops) {
EXPECT_TRUE(matches("void f() { for(;;); }", forStmt()));
EXPECT_TRUE(matches("void f() { if(true) for(;;); }", forStmt()));
EXPECT_TRUE(notMatches("int as[] = { 1, 2, 3 };"
"void f() { for (auto &a : as); }",
forStmt()));
}
TEST(For, ReportsNoFalsePositives) {
EXPECT_TRUE(notMatches("void f() { ; }", forStmt()));
EXPECT_TRUE(notMatches("void f() { if(true); }", forStmt()));
}
TEST(CompoundStatement, HandlesSimpleCases) {
EXPECT_TRUE(notMatches("void f();", compoundStmt()));
EXPECT_TRUE(matches("void f() {}", compoundStmt()));
EXPECT_TRUE(matches("void f() {{}}", compoundStmt()));
}
TEST(CompoundStatement, DoesNotMatchEmptyStruct) {
// It's not a compound statement just because there's "{}" in the source
// text. This is an AST search, not grep.
EXPECT_TRUE(notMatches("namespace n { struct S {}; }",
compoundStmt()));
EXPECT_TRUE(matches("namespace n { struct S { void f() {{}} }; }",
compoundStmt()));
}
TEST(CastExpression, MatchesExplicitCasts) {
EXPECT_TRUE(matches("char *p = reinterpret_cast<char *>(&p);",castExpr()));
EXPECT_TRUE(matches("void *p = (void *)(&p);", castExpr()));
EXPECT_TRUE(matches("char q, *p = const_cast<char *>(&q);", castExpr()));
EXPECT_TRUE(matches("char c = char(0);", castExpr()));
}
TEST(CastExpression, MatchesImplicitCasts) {
// This test creates an implicit cast from int to char.
EXPECT_TRUE(matches("char c = 0;", castExpr()));
// This test creates an implicit cast from lvalue to rvalue.
EXPECT_TRUE(matches("char c = 0, d = c;", castExpr()));
}
TEST(CastExpression, DoesNotMatchNonCasts) {
EXPECT_TRUE(notMatches("char c = '0';", castExpr()));
EXPECT_TRUE(notMatches("char c, &q = c;", castExpr()));
EXPECT_TRUE(notMatches("int i = (0);", castExpr()));
EXPECT_TRUE(notMatches("int i = 0;", castExpr()));
}
TEST(ReinterpretCast, MatchesSimpleCase) {
EXPECT_TRUE(matches("char* p = reinterpret_cast<char*>(&p);",
cxxReinterpretCastExpr()));
}
TEST(ReinterpretCast, DoesNotMatchOtherCasts) {
EXPECT_TRUE(notMatches("char* p = (char*)(&p);", cxxReinterpretCastExpr()));
EXPECT_TRUE(notMatches("char q, *p = const_cast<char*>(&q);",
cxxReinterpretCastExpr()));
EXPECT_TRUE(notMatches("void* p = static_cast<void*>(&p);",
cxxReinterpretCastExpr()));
EXPECT_TRUE(notMatches("struct B { virtual ~B() {} }; struct D : B {};"
"B b;"
"D* p = dynamic_cast<D*>(&b);",
cxxReinterpretCastExpr()));
}
TEST(FunctionalCast, MatchesSimpleCase) {
std::string foo_class = "class Foo { public: Foo(const char*); };";
EXPECT_TRUE(matches(foo_class + "void r() { Foo f = Foo(\"hello world\"); }",
cxxFunctionalCastExpr()));
}
TEST(FunctionalCast, DoesNotMatchOtherCasts) {
std::string FooClass = "class Foo { public: Foo(const char*); };";
EXPECT_TRUE(
notMatches(FooClass + "void r() { Foo f = (Foo) \"hello world\"; }",
cxxFunctionalCastExpr()));
EXPECT_TRUE(
notMatches(FooClass + "void r() { Foo f = \"hello world\"; }",
cxxFunctionalCastExpr()));
}
TEST(DynamicCast, MatchesSimpleCase) {
EXPECT_TRUE(matches("struct B { virtual ~B() {} }; struct D : B {};"
"B b;"
"D* p = dynamic_cast<D*>(&b);",
cxxDynamicCastExpr()));
}
TEST(StaticCast, MatchesSimpleCase) {
EXPECT_TRUE(matches("void* p(static_cast<void*>(&p));",
cxxStaticCastExpr()));
}
TEST(StaticCast, DoesNotMatchOtherCasts) {
EXPECT_TRUE(notMatches("char* p = (char*)(&p);", cxxStaticCastExpr()));
EXPECT_TRUE(notMatches("char q, *p = const_cast<char*>(&q);",
cxxStaticCastExpr()));
EXPECT_TRUE(notMatches("void* p = reinterpret_cast<char*>(&p);",
cxxStaticCastExpr()));
EXPECT_TRUE(notMatches("struct B { virtual ~B() {} }; struct D : B {};"
"B b;"
"D* p = dynamic_cast<D*>(&b);",
cxxStaticCastExpr()));
}
TEST(CStyleCast, MatchesSimpleCase) {
EXPECT_TRUE(matches("int i = (int) 2.2f;", cStyleCastExpr()));
}
TEST(CStyleCast, DoesNotMatchOtherCasts) {
EXPECT_TRUE(notMatches("char* p = static_cast<char*>(0);"
"char q, *r = const_cast<char*>(&q);"
"void* s = reinterpret_cast<char*>(&s);"
"struct B { virtual ~B() {} }; struct D : B {};"
"B b;"
"D* t = dynamic_cast<D*>(&b);",
cStyleCastExpr()));
}
TEST(ImplicitCast, MatchesSimpleCase) {
// This test creates an implicit const cast.
EXPECT_TRUE(matches("int x = 0; const int y = x;",
varDecl(hasInitializer(implicitCastExpr()))));
// This test creates an implicit cast from int to char.
EXPECT_TRUE(matches("char c = 0;",
varDecl(hasInitializer(implicitCastExpr()))));
// This test creates an implicit array-to-pointer cast.
EXPECT_TRUE(matches("int arr[6]; int *p = arr;",
varDecl(hasInitializer(implicitCastExpr()))));
}
TEST(ImplicitCast, DoesNotMatchIncorrectly) {
// This test verifies that implicitCastExpr() matches exactly when implicit casts
// are present, and that it ignores explicit and paren casts.
// These two test cases have no casts.
EXPECT_TRUE(notMatches("int x = 0;",
varDecl(hasInitializer(implicitCastExpr()))));
EXPECT_TRUE(notMatches("int x = 0, &y = x;",
varDecl(hasInitializer(implicitCastExpr()))));
EXPECT_TRUE(notMatches("int x = 0; double d = (double) x;",
varDecl(hasInitializer(implicitCastExpr()))));
EXPECT_TRUE(notMatches("const int *p; int *q = const_cast<int *>(p);",
varDecl(hasInitializer(implicitCastExpr()))));
EXPECT_TRUE(notMatches("int x = (0);",
varDecl(hasInitializer(implicitCastExpr()))));
}
TEST(Statement, DoesNotMatchDeclarations) {
EXPECT_TRUE(notMatches("class X {};", stmt()));
}
TEST(Statement, MatchesCompoundStatments) {
EXPECT_TRUE(matches("void x() {}", stmt()));
}
TEST(DeclarationStatement, DoesNotMatchCompoundStatements) {
EXPECT_TRUE(notMatches("void x() {}", declStmt()));
}
TEST(DeclarationStatement, MatchesVariableDeclarationStatements) {
EXPECT_TRUE(matches("void x() { int a; }", declStmt()));
}
TEST(ExprWithCleanups, MatchesExprWithCleanups) {
EXPECT_TRUE(matches("struct Foo { ~Foo(); };"
"const Foo f = Foo();",
varDecl(hasInitializer(exprWithCleanups()))));
EXPECT_FALSE(matches("struct Foo { }; Foo a;"
"const Foo f = a;",
varDecl(hasInitializer(exprWithCleanups()))));
}
TEST(InitListExpression, MatchesInitListExpression) {
EXPECT_TRUE(matches("int a[] = { 1, 2 };",
initListExpr(hasType(asString("int [2]")))));
EXPECT_TRUE(matches("struct B { int x, y; }; B b = { 5, 6 };",
initListExpr(hasType(recordDecl(hasName("B"))))));
EXPECT_TRUE(matches("struct S { S(void (*a)()); };"
"void f();"
"S s[1] = { &f };",
declRefExpr(to(functionDecl(hasName("f"))))));
EXPECT_TRUE(
matches("int i[1] = {42, [0] = 43};", integerLiteral(equals(42))));
}
TEST(UsingDeclaration, MatchesUsingDeclarations) {
EXPECT_TRUE(matches("namespace X { int x; } using X::x;",
usingDecl()));
}
TEST(UsingDeclaration, MatchesShadowUsingDelcarations) {
EXPECT_TRUE(matches("namespace f { int a; } using f::a;",
usingDecl(hasAnyUsingShadowDecl(hasName("a")))));
}
TEST(UsingDirectiveDeclaration, MatchesUsingNamespace) {
EXPECT_TRUE(matches("namespace X { int x; } using namespace X;",
usingDirectiveDecl()));
EXPECT_FALSE(
matches("namespace X { int x; } using X::x;", usingDirectiveDecl()));
}
TEST(While, MatchesWhileLoops) {
EXPECT_TRUE(notMatches("void x() {}", whileStmt()));
EXPECT_TRUE(matches("void x() { while(true); }", whileStmt()));
EXPECT_TRUE(notMatches("void x() { do {} while(true); }", whileStmt()));
}
TEST(Do, MatchesDoLoops) {
EXPECT_TRUE(matches("void x() { do {} while(true); }", doStmt()));
EXPECT_TRUE(matches("void x() { do ; while(false); }", doStmt()));
}
TEST(Do, DoesNotMatchWhileLoops) {
EXPECT_TRUE(notMatches("void x() { while(true) {} }", doStmt()));
}
TEST(SwitchCase, MatchesCase) {
EXPECT_TRUE(matches("void x() { switch(42) { case 42:; } }", switchCase()));
EXPECT_TRUE(matches("void x() { switch(42) { default:; } }", switchCase()));
EXPECT_TRUE(matches("void x() { switch(42) default:; }", switchCase()));
EXPECT_TRUE(notMatches("void x() { switch(42) {} }", switchCase()));
}
TEST(SwitchCase, MatchesSwitch) {
EXPECT_TRUE(matches("void x() { switch(42) { case 42:; } }", switchStmt()));
EXPECT_TRUE(matches("void x() { switch(42) { default:; } }", switchStmt()));
EXPECT_TRUE(matches("void x() { switch(42) default:; }", switchStmt()));
EXPECT_TRUE(notMatches("void x() {}", switchStmt()));
}
TEST(ExceptionHandling, SimpleCases) {
EXPECT_TRUE(matches("void foo() try { } catch(int X) { }", cxxCatchStmt()));
EXPECT_TRUE(matches("void foo() try { } catch(int X) { }", cxxTryStmt()));
EXPECT_TRUE(
notMatches("void foo() try { } catch(int X) { }", cxxThrowExpr()));
EXPECT_TRUE(matches("void foo() try { throw; } catch(int X) { }",
cxxThrowExpr()));
EXPECT_TRUE(matches("void foo() try { throw 5;} catch(int X) { }",
cxxThrowExpr()));
EXPECT_TRUE(matches("void foo() try { throw; } catch(...) { }",
cxxCatchStmt(isCatchAll())));
EXPECT_TRUE(notMatches("void foo() try { throw; } catch(int) { }",
cxxCatchStmt(isCatchAll())));
EXPECT_TRUE(matches("void foo() try {} catch(int X) { }",
varDecl(isExceptionVariable())));
EXPECT_TRUE(notMatches("void foo() try { int X; } catch (...) { }",
varDecl(isExceptionVariable())));
}
TEST(ParenExpression, SimpleCases) {
EXPECT_TRUE(matches("int i = (3);", parenExpr()));
EXPECT_TRUE(matches("int i = (3 + 7);", parenExpr()));
EXPECT_TRUE(notMatches("int i = 3;", parenExpr()));
EXPECT_TRUE(notMatches("int foo() { return 1; }; int a = foo();",
parenExpr()));
}
TEST(TypeMatching, MatchesTypes) {
EXPECT_TRUE(matches("struct S {};", qualType().bind("loc")));
}
TEST(TypeMatching, MatchesConstantArrayTypes) {
EXPECT_TRUE(matches("int a[2];", constantArrayType()));
EXPECT_TRUE(notMatches(
"void f() { int a[] = { 2, 3 }; int b[a[0]]; }",
constantArrayType(hasElementType(builtinType()))));
EXPECT_TRUE(matches("int a[42];", constantArrayType(hasSize(42))));
EXPECT_TRUE(matches("int b[2*21];", constantArrayType(hasSize(42))));
EXPECT_TRUE(notMatches("int c[41], d[43];", constantArrayType(hasSize(42))));
}
TEST(TypeMatching, MatchesDependentSizedArrayTypes) {
EXPECT_TRUE(matches(
"template <typename T, int Size> class array { T data[Size]; };",
dependentSizedArrayType()));
EXPECT_TRUE(notMatches(
"int a[42]; int b[] = { 2, 3 }; void f() { int c[b[0]]; }",
dependentSizedArrayType()));
}
TEST(TypeMatching, MatchesIncompleteArrayType) {
EXPECT_TRUE(matches("int a[] = { 2, 3 };", incompleteArrayType()));
EXPECT_TRUE(matches("void f(int a[]) {}", incompleteArrayType()));
EXPECT_TRUE(notMatches("int a[42]; void f() { int b[a[0]]; }",
incompleteArrayType()));
}
TEST(TypeMatching, MatchesVariableArrayType) {
EXPECT_TRUE(matches("void f(int b) { int a[b]; }", variableArrayType()));
EXPECT_TRUE(notMatches("int a[] = {2, 3}; int b[42];", variableArrayType()));
EXPECT_TRUE(matches(
"void f(int b) { int a[b]; }",
variableArrayType(hasSizeExpr(ignoringImpCasts(declRefExpr(to(
varDecl(hasName("b")))))))));
}
TEST(TypeMatching, MatchesAtomicTypes) {
if (llvm::Triple(llvm::sys::getDefaultTargetTriple()).getOS() !=
llvm::Triple::Win32) {
// FIXME: Make this work for MSVC.
EXPECT_TRUE(matches("_Atomic(int) i;", atomicType()));
EXPECT_TRUE(matches("_Atomic(int) i;",
atomicType(hasValueType(isInteger()))));
EXPECT_TRUE(notMatches("_Atomic(float) f;",
atomicType(hasValueType(isInteger()))));
}
}
TEST(TypeMatching, MatchesAutoTypes) {
EXPECT_TRUE(matches("auto i = 2;", autoType()));
EXPECT_TRUE(matches("int v[] = { 2, 3 }; void f() { for (int i : v) {} }",
autoType()));
// FIXME: Matching against the type-as-written can't work here, because the
// type as written was not deduced.
//EXPECT_TRUE(matches("auto a = 1;",
// autoType(hasDeducedType(isInteger()))));
//EXPECT_TRUE(notMatches("auto b = 2.0;",
// autoType(hasDeducedType(isInteger()))));
}
TEST(TypeMatching, MatchesFunctionTypes) {
EXPECT_TRUE(matches("int (*f)(int);", functionType()));
EXPECT_TRUE(matches("void f(int i) {}", functionType()));
}
TEST(TypeMatching, IgnoringParens) {
EXPECT_TRUE(
notMatches("void (*fp)(void);", pointerType(pointee(functionType()))));
EXPECT_TRUE(matches("void (*fp)(void);",
pointerType(pointee(ignoringParens(functionType())))));
}
TEST(TypeMatching, MatchesFunctionProtoTypes) {
EXPECT_TRUE(matches("int (*f)(int);", functionProtoType()));
EXPECT_TRUE(matches("void f(int i);", functionProtoType()));
EXPECT_TRUE(matches("void f();", functionProtoType(parameterCountIs(0))));
EXPECT_TRUE(notMatchesC("void f();", functionProtoType()));
EXPECT_TRUE(
matchesC("void f(void);", functionProtoType(parameterCountIs(0))));
}
TEST(TypeMatching, MatchesParenType) {
EXPECT_TRUE(
matches("int (*array)[4];", varDecl(hasType(pointsTo(parenType())))));
EXPECT_TRUE(notMatches("int *array[4];", varDecl(hasType(parenType()))));
EXPECT_TRUE(matches(
"int (*ptr_to_func)(int);",
varDecl(hasType(pointsTo(parenType(innerType(functionType())))))));
EXPECT_TRUE(notMatches(
"int (*ptr_to_array)[4];",
varDecl(hasType(pointsTo(parenType(innerType(functionType())))))));
}
TEST(TypeMatching, PointerTypes) {
// FIXME: Reactive when these tests can be more specific (not matching
// implicit code on certain platforms), likely when we have hasDescendant for
// Types/TypeLocs.
//EXPECT_TRUE(matchAndVerifyResultTrue(
// "int* a;",
// pointerTypeLoc(pointeeLoc(typeLoc().bind("loc"))),
// llvm::make_unique<VerifyIdIsBoundTo<TypeLoc>>("loc", 1)));
//EXPECT_TRUE(matchAndVerifyResultTrue(
// "int* a;",
// pointerTypeLoc().bind("loc"),
// llvm::make_unique<VerifyIdIsBoundTo<TypeLoc>>("loc", 1)));
EXPECT_TRUE(matches(
"int** a;",
loc(pointerType(pointee(qualType())))));
EXPECT_TRUE(matches(
"int** a;",
loc(pointerType(pointee(pointerType())))));
EXPECT_TRUE(matches(
"int* b; int* * const a = &b;",
loc(qualType(isConstQualified(), pointerType()))));
std::string Fragment = "struct A { int i; }; int A::* ptr = &A::i;";
EXPECT_TRUE(notMatches(Fragment, varDecl(hasName("ptr"),
hasType(blockPointerType()))));
EXPECT_TRUE(matches(Fragment, varDecl(hasName("ptr"),
hasType(memberPointerType()))));
EXPECT_TRUE(notMatches(Fragment, varDecl(hasName("ptr"),
hasType(pointerType()))));
EXPECT_TRUE(notMatches(Fragment, varDecl(hasName("ptr"),
hasType(referenceType()))));
EXPECT_TRUE(notMatches(Fragment, varDecl(hasName("ptr"),
hasType(lValueReferenceType()))));
EXPECT_TRUE(notMatches(Fragment, varDecl(hasName("ptr"),
hasType(rValueReferenceType()))));
Fragment = "int *ptr;";
EXPECT_TRUE(notMatches(Fragment, varDecl(hasName("ptr"),
hasType(blockPointerType()))));
EXPECT_TRUE(notMatches(Fragment, varDecl(hasName("ptr"),
hasType(memberPointerType()))));
EXPECT_TRUE(matches(Fragment, varDecl(hasName("ptr"),
hasType(pointerType()))));
EXPECT_TRUE(notMatches(Fragment, varDecl(hasName("ptr"),
hasType(referenceType()))));
Fragment = "int a; int &ref = a;";
EXPECT_TRUE(notMatches(Fragment, varDecl(hasName("ref"),
hasType(blockPointerType()))));
EXPECT_TRUE(notMatches(Fragment, varDecl(hasName("ref"),
hasType(memberPointerType()))));
EXPECT_TRUE(notMatches(Fragment, varDecl(hasName("ref"),
hasType(pointerType()))));
EXPECT_TRUE(matches(Fragment, varDecl(hasName("ref"),
hasType(referenceType()))));
EXPECT_TRUE(matches(Fragment, varDecl(hasName("ref"),
hasType(lValueReferenceType()))));
EXPECT_TRUE(notMatches(Fragment, varDecl(hasName("ref"),
hasType(rValueReferenceType()))));
Fragment = "int &&ref = 2;";
EXPECT_TRUE(notMatches(Fragment, varDecl(hasName("ref"),
hasType(blockPointerType()))));
EXPECT_TRUE(notMatches(Fragment, varDecl(hasName("ref"),
hasType(memberPointerType()))));
EXPECT_TRUE(notMatches(Fragment, varDecl(hasName("ref"),
hasType(pointerType()))));
EXPECT_TRUE(matches(Fragment, varDecl(hasName("ref"),
hasType(referenceType()))));
EXPECT_TRUE(notMatches(Fragment, varDecl(hasName("ref"),
hasType(lValueReferenceType()))));
EXPECT_TRUE(matches(Fragment, varDecl(hasName("ref"),
hasType(rValueReferenceType()))));
}
TEST(TypeMatching, AutoRefTypes) {
std::string Fragment = "auto a = 1;"
"auto b = a;"
"auto &c = a;"
"auto &&d = c;"
"auto &&e = 2;";
EXPECT_TRUE(notMatches(Fragment, varDecl(hasName("a"),
hasType(referenceType()))));
EXPECT_TRUE(notMatches(Fragment, varDecl(hasName("b"),
hasType(referenceType()))));
EXPECT_TRUE(matches(Fragment, varDecl(hasName("c"),
hasType(referenceType()))));
EXPECT_TRUE(matches(Fragment, varDecl(hasName("c"),
hasType(lValueReferenceType()))));
EXPECT_TRUE(notMatches(Fragment, varDecl(hasName("c"),
hasType(rValueReferenceType()))));
EXPECT_TRUE(matches(Fragment, varDecl(hasName("d"),
hasType(referenceType()))));
EXPECT_TRUE(matches(Fragment, varDecl(hasName("d"),
hasType(lValueReferenceType()))));
EXPECT_TRUE(notMatches(Fragment, varDecl(hasName("d"),
hasType(rValueReferenceType()))));
EXPECT_TRUE(matches(Fragment, varDecl(hasName("e"),
hasType(referenceType()))));
EXPECT_TRUE(notMatches(Fragment, varDecl(hasName("e"),
hasType(lValueReferenceType()))));
EXPECT_TRUE(matches(Fragment, varDecl(hasName("e"),
hasType(rValueReferenceType()))));
}
TEST(TypeMatching, MatchesEnumTypes) {
EXPECT_TRUE(matches("enum Color { Green }; Color color;",
loc(enumType())));
EXPECT_TRUE(matches("enum class Color { Green }; Color color;",
loc(enumType())));
}
TEST(TypeMatching, MatchesPointersToConstTypes) {
EXPECT_TRUE(matches("int b; int * const a = &b;",
loc(pointerType())));
EXPECT_TRUE(matches("int b; int * const a = &b;",
loc(pointerType())));
EXPECT_TRUE(matches(
"int b; const int * a = &b;",
loc(pointerType(pointee(builtinType())))));
EXPECT_TRUE(matches(
"int b; const int * a = &b;",
pointerType(pointee(builtinType()))));
}
TEST(TypeMatching, MatchesTypedefTypes) {
EXPECT_TRUE(matches("typedef int X; X a;", varDecl(hasName("a"),
hasType(typedefType()))));
}
TEST(TypeMatching, MatchesTemplateSpecializationType) {
EXPECT_TRUE(matches("template <typename T> class A{}; A<int> a;",
templateSpecializationType()));
}
TEST(TypeMatching, MatchesRecordType) {
EXPECT_TRUE(matches("class C{}; C c;", recordType()));
EXPECT_TRUE(matches("struct S{}; S s;",
recordType(hasDeclaration(recordDecl(hasName("S"))))));
EXPECT_TRUE(notMatches("int i;",
recordType(hasDeclaration(recordDecl(hasName("S"))))));
}
TEST(TypeMatching, MatchesElaboratedType) {
EXPECT_TRUE(matches(
"namespace N {"
" namespace M {"
" class D {};"
" }"
"}"
"N::M::D d;", elaboratedType()));
EXPECT_TRUE(matches("class C {} c;", elaboratedType()));
EXPECT_TRUE(notMatches("class C {}; C c;", elaboratedType()));
}
TEST(TypeMatching, MatchesSubstTemplateTypeParmType) {
const std::string code = "template <typename T>"
"int F() {"
" return 1 + T();"
"}"
"int i = F<int>();";
EXPECT_FALSE(matches(code, binaryOperator(hasLHS(
expr(hasType(substTemplateTypeParmType()))))));
EXPECT_TRUE(matches(code, binaryOperator(hasRHS(
expr(hasType(substTemplateTypeParmType()))))));
}
TEST(NNS, MatchesNestedNameSpecifiers) {
EXPECT_TRUE(matches("namespace ns { struct A {}; } ns::A a;",
nestedNameSpecifier()));
EXPECT_TRUE(matches("template <typename T> class A { typename T::B b; };",
nestedNameSpecifier()));
EXPECT_TRUE(matches("struct A { void f(); }; void A::f() {}",
nestedNameSpecifier()));
EXPECT_TRUE(matches("namespace a { namespace b {} } namespace ab = a::b;",
nestedNameSpecifier()));
EXPECT_TRUE(matches(
"struct A { static void f() {} }; void g() { A::f(); }",
nestedNameSpecifier()));
EXPECT_TRUE(notMatches(
"struct A { static void f() {} }; void g(A* a) { a->f(); }",
nestedNameSpecifier()));
}
TEST(NullStatement, SimpleCases) {
EXPECT_TRUE(matches("void f() {int i;;}", nullStmt()));
EXPECT_TRUE(notMatches("void f() {int i;}", nullStmt()));
}
TEST(NS, Alias) {
EXPECT_TRUE(matches("namespace test {} namespace alias = ::test;",
namespaceAliasDecl(hasName("alias"))));
}
TEST(NNS, MatchesTypes) {
NestedNameSpecifierMatcher Matcher = nestedNameSpecifier(
specifiesType(hasDeclaration(recordDecl(hasName("A")))));
EXPECT_TRUE(matches("struct A { struct B {}; }; A::B b;", Matcher));
EXPECT_TRUE(matches("struct A { struct B { struct C {}; }; }; A::B::C c;",
Matcher));
EXPECT_TRUE(notMatches("namespace A { struct B {}; } A::B b;", Matcher));
}
TEST(NNS, MatchesNamespaceDecls) {
NestedNameSpecifierMatcher Matcher = nestedNameSpecifier(
specifiesNamespace(hasName("ns")));
EXPECT_TRUE(matches("namespace ns { struct A {}; } ns::A a;", Matcher));
EXPECT_TRUE(notMatches("namespace xx { struct A {}; } xx::A a;", Matcher));
EXPECT_TRUE(notMatches("struct ns { struct A {}; }; ns::A a;", Matcher));
}
TEST(NNS, MatchesNestedNameSpecifierPrefixes) {
EXPECT_TRUE(matches(
"struct A { struct B { struct C {}; }; }; A::B::C c;",
nestedNameSpecifier(hasPrefix(specifiesType(asString("struct A"))))));
EXPECT_TRUE(matches(
"struct A { struct B { struct C {}; }; }; A::B::C c;",
nestedNameSpecifierLoc(hasPrefix(
specifiesTypeLoc(loc(qualType(asString("struct A"))))))));
}
template <typename T>
class VerifyAncestorHasChildIsEqual : public BoundNodesCallback {
public:
bool run(const BoundNodes *Nodes) override { return false; }
bool run(const BoundNodes *Nodes, ASTContext *Context) override {
const T *Node = Nodes->getNodeAs<T>("");
return verify(*Nodes, *Context, Node);
}
bool verify(const BoundNodes &Nodes, ASTContext &Context, const Stmt *Node) {
// Use the original typed pointer to verify we can pass pointers to subtypes
// to equalsNode.
const T *TypedNode = cast<T>(Node);
return selectFirst<T>(
"", match(stmt(hasParent(
stmt(has(stmt(equalsNode(TypedNode)))).bind(""))),
*Node, Context)) != nullptr;
}
bool verify(const BoundNodes &Nodes, ASTContext &Context, const Decl *Node) {
// Use the original typed pointer to verify we can pass pointers to subtypes
// to equalsNode.
const T *TypedNode = cast<T>(Node);
return selectFirst<T>(
"", match(decl(hasParent(
decl(has(decl(equalsNode(TypedNode)))).bind(""))),
*Node, Context)) != nullptr;
}
bool verify(const BoundNodes &Nodes, ASTContext &Context, const Type *Node) {
// Use the original typed pointer to verify we can pass pointers to subtypes
// to equalsNode.
const T *TypedNode = cast<T>(Node);
const auto *Dec = Nodes.getNodeAs<FieldDecl>("decl");
return selectFirst<T>(
"", match(fieldDecl(hasParent(decl(has(fieldDecl(
hasType(type(equalsNode(TypedNode)).bind(""))))))),
*Dec, Context)) != nullptr;
}
};
TEST(IsEqualTo, MatchesNodesByIdentity) {
EXPECT_TRUE(matchAndVerifyResultTrue(
"class X { class Y {}; };", recordDecl(hasName("::X::Y")).bind(""),
llvm::make_unique<VerifyAncestorHasChildIsEqual<CXXRecordDecl>>()));
EXPECT_TRUE(matchAndVerifyResultTrue(
"void f() { if (true) if(true) {} }", ifStmt().bind(""),
llvm::make_unique<VerifyAncestorHasChildIsEqual<IfStmt>>()));
EXPECT_TRUE(matchAndVerifyResultTrue(
"class X { class Y {} y; };",
fieldDecl(hasName("y"), hasType(type().bind(""))).bind("decl"),
llvm::make_unique<VerifyAncestorHasChildIsEqual<Type>>()));
}
TEST(TypedefDeclMatcher, Match) {
EXPECT_TRUE(matches("typedef int typedefDeclTest;",
typedefDecl(hasName("typedefDeclTest"))));
EXPECT_TRUE(notMatches("using typedefDeclTest2 = int;",
typedefDecl(hasName("typedefDeclTest2"))));
}
TEST(TypeAliasDeclMatcher, Match) {
EXPECT_TRUE(matches("using typeAliasTest2 = int;",
typeAliasDecl(hasName("typeAliasTest2"))));
EXPECT_TRUE(notMatches("typedef int typeAliasTest;",
typeAliasDecl(hasName("typeAliasTest"))));
}
TEST(TypedefNameDeclMatcher, Match) {
EXPECT_TRUE(matches("typedef int typedefNameDeclTest1;",
typedefNameDecl(hasName("typedefNameDeclTest1"))));
EXPECT_TRUE(matches("using typedefNameDeclTest2 = int;",
typedefNameDecl(hasName("typedefNameDeclTest2"))));
}
TEST(ObjCMessageExprMatcher, SimpleExprs) {
// don't find ObjCMessageExpr where none are present
EXPECT_TRUE(notMatchesObjC("", objcMessageExpr(anything())));
std::string Objc1String =
"@interface Str "
" - (Str *)uppercaseString:(Str *)str;"
"@end "
"@interface foo "
"- (void)meth:(Str *)text;"
"@end "
" "
"@implementation foo "
"- (void) meth:(Str *)text { "
" [self contents];"
" Str *up = [text uppercaseString];"
"} "
"@end ";
EXPECT_TRUE(matchesObjC(
Objc1String,
objcMessageExpr(anything())));
EXPECT_TRUE(matchesObjC(
Objc1String,
objcMessageExpr(hasSelector("contents"))));
EXPECT_TRUE(matchesObjC(
Objc1String,
objcMessageExpr(matchesSelector("cont*"))));
EXPECT_FALSE(matchesObjC(
Objc1String,
objcMessageExpr(matchesSelector("?cont*"))));
EXPECT_TRUE(notMatchesObjC(
Objc1String,
objcMessageExpr(hasSelector("contents"), hasNullSelector())));
EXPECT_TRUE(matchesObjC(
Objc1String,
objcMessageExpr(hasSelector("contents"), hasUnarySelector())));
EXPECT_TRUE(matchesObjC(
Objc1String,
objcMessageExpr(hasSelector("contents"), numSelectorArgs(0))));
EXPECT_TRUE(matchesObjC(
Objc1String,
objcMessageExpr(matchesSelector("uppercase*"),
argumentCountIs(0)
)));
}
} // namespace ast_matchers
} // namespace clang
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