1 //===- unittest/Tooling/RecursiveASTVisitorTestExprVisitor.cpp ------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "TestVisitor.h"
12 using namespace clang;
16 class ParenExprVisitor : public ExpectedLocationVisitor<ParenExprVisitor> {
18 bool VisitParenExpr(ParenExpr *Parens) {
19 Match("", Parens->getExprLoc());
24 TEST(RecursiveASTVisitor, VisitsParensDuringDataRecursion) {
25 ParenExprVisitor Visitor;
26 Visitor.ExpectMatch("", 1, 9);
27 EXPECT_TRUE(Visitor.runOver("int k = (4) + 9;\n"));
30 class TemplateArgumentLocTraverser
31 : public ExpectedLocationVisitor<TemplateArgumentLocTraverser> {
33 bool TraverseTemplateArgumentLoc(const TemplateArgumentLoc &ArgLoc) {
35 llvm::raw_string_ostream Stream(ArgStr);
36 const TemplateArgument &Arg = ArgLoc.getArgument();
38 Arg.print(Context->getPrintingPolicy(), Stream);
39 Match(Stream.str(), ArgLoc.getLocation());
40 return ExpectedLocationVisitor<TemplateArgumentLocTraverser>::
41 TraverseTemplateArgumentLoc(ArgLoc);
45 TEST(RecursiveASTVisitor, VisitsClassTemplateTemplateParmDefaultArgument) {
46 TemplateArgumentLocTraverser Visitor;
47 Visitor.ExpectMatch("X", 2, 40);
48 EXPECT_TRUE(Visitor.runOver(
49 "template<typename T> class X;\n"
50 "template<template <typename> class T = X> class Y;\n"
51 "template<template <typename> class T> class Y {};\n"));
54 class CXXBoolLiteralExprVisitor
55 : public ExpectedLocationVisitor<CXXBoolLiteralExprVisitor> {
57 bool VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *BE) {
59 Match("true", BE->getLocation());
61 Match("false", BE->getLocation());
66 TEST(RecursiveASTVisitor, VisitsClassTemplateNonTypeParmDefaultArgument) {
67 CXXBoolLiteralExprVisitor Visitor;
68 Visitor.ExpectMatch("true", 2, 19);
69 EXPECT_TRUE(Visitor.runOver(
70 "template<bool B> class X;\n"
71 "template<bool B = true> class Y;\n"
72 "template<bool B> class Y {};\n"));
75 // A visitor that visits implicit declarations and matches constructors.
76 class ImplicitCtorVisitor
77 : public ExpectedLocationVisitor<ImplicitCtorVisitor> {
79 bool shouldVisitImplicitCode() const { return true; }
81 bool VisitCXXConstructorDecl(CXXConstructorDecl* Ctor) {
82 if (Ctor->isImplicit()) { // Was not written in source code
83 if (const CXXRecordDecl* Class = Ctor->getParent()) {
84 Match(Class->getName(), Ctor->getLocation());
91 TEST(RecursiveASTVisitor, VisitsImplicitCopyConstructors) {
92 ImplicitCtorVisitor Visitor;
93 Visitor.ExpectMatch("Simple", 2, 8);
94 // Note: Clang lazily instantiates implicit declarations, so we need
95 // to use them in order to force them to appear in the AST.
96 EXPECT_TRUE(Visitor.runOver(
97 "struct WithCtor { WithCtor(); }; \n"
98 "struct Simple { Simple(); WithCtor w; }; \n"
99 "int main() { Simple s; Simple t(s); }\n"));
102 /// \brief A visitor that optionally includes implicit code and matches
103 /// CXXConstructExpr.
105 /// The name recorded for the match is the name of the class whose constructor
106 /// is invoked by the CXXConstructExpr, not the name of the class whose
107 /// constructor the CXXConstructExpr is contained in.
108 class ConstructExprVisitor
109 : public ExpectedLocationVisitor<ConstructExprVisitor> {
111 ConstructExprVisitor() : ShouldVisitImplicitCode(false) {}
113 bool shouldVisitImplicitCode() const { return ShouldVisitImplicitCode; }
115 void setShouldVisitImplicitCode(bool NewValue) {
116 ShouldVisitImplicitCode = NewValue;
119 bool VisitCXXConstructExpr(CXXConstructExpr* Expr) {
120 if (const CXXConstructorDecl* Ctor = Expr->getConstructor()) {
121 if (const CXXRecordDecl* Class = Ctor->getParent()) {
122 Match(Class->getName(), Expr->getLocation());
129 bool ShouldVisitImplicitCode;
132 TEST(RecursiveASTVisitor, CanVisitImplicitMemberInitializations) {
133 ConstructExprVisitor Visitor;
134 Visitor.setShouldVisitImplicitCode(true);
135 Visitor.ExpectMatch("WithCtor", 2, 8);
136 // Simple has a constructor that implicitly initializes 'w'. Test
137 // that a visitor that visits implicit code visits that initialization.
138 // Note: Clang lazily instantiates implicit declarations, so we need
139 // to use them in order to force them to appear in the AST.
140 EXPECT_TRUE(Visitor.runOver(
141 "struct WithCtor { WithCtor(); }; \n"
142 "struct Simple { WithCtor w; }; \n"
143 "int main() { Simple s; }\n"));
146 // The same as CanVisitImplicitMemberInitializations, but checking that the
147 // visits are omitted when the visitor does not include implicit code.
148 TEST(RecursiveASTVisitor, CanSkipImplicitMemberInitializations) {
149 ConstructExprVisitor Visitor;
150 Visitor.setShouldVisitImplicitCode(false);
151 Visitor.DisallowMatch("WithCtor", 2, 8);
152 // Simple has a constructor that implicitly initializes 'w'. Test
153 // that a visitor that skips implicit code skips that initialization.
154 // Note: Clang lazily instantiates implicit declarations, so we need
155 // to use them in order to force them to appear in the AST.
156 EXPECT_TRUE(Visitor.runOver(
157 "struct WithCtor { WithCtor(); }; \n"
158 "struct Simple { WithCtor w; }; \n"
159 "int main() { Simple s; }\n"));
162 class DeclRefExprVisitor : public ExpectedLocationVisitor<DeclRefExprVisitor> {
164 DeclRefExprVisitor() : ShouldVisitImplicitCode(false) {}
166 bool shouldVisitImplicitCode() const { return ShouldVisitImplicitCode; }
168 void setShouldVisitImplicitCode(bool NewValue) {
169 ShouldVisitImplicitCode = NewValue;
172 bool VisitDeclRefExpr(DeclRefExpr *Reference) {
173 Match(Reference->getNameInfo().getAsString(), Reference->getLocation());
178 bool ShouldVisitImplicitCode;
181 TEST(RecursiveASTVisitor, VisitsBaseClassTemplateArguments) {
182 DeclRefExprVisitor Visitor;
183 Visitor.ExpectMatch("x", 2, 3);
184 EXPECT_TRUE(Visitor.runOver(
185 "void x(); template <void (*T)()> class X {};\nX<x> y;"));
188 TEST(RecursiveASTVisitor, VisitsCXXForRangeStmtRange) {
189 DeclRefExprVisitor Visitor;
190 Visitor.ExpectMatch("x", 2, 25);
191 Visitor.ExpectMatch("x", 2, 30);
192 EXPECT_TRUE(Visitor.runOver(
194 "void f() { for (int i : x) { x[0] = 1; } }",
195 DeclRefExprVisitor::Lang_CXX11));
198 TEST(RecursiveASTVisitor, VisitsCallExpr) {
199 DeclRefExprVisitor Visitor;
200 Visitor.ExpectMatch("x", 1, 22);
201 EXPECT_TRUE(Visitor.runOver(
202 "void x(); void y() { x(); }"));
205 TEST(RecursiveASTVisitor, VisitsExplicitLambdaCaptureInit) {
206 DeclRefExprVisitor Visitor;
207 Visitor.ExpectMatch("i", 1, 20);
208 EXPECT_TRUE(Visitor.runOver(
209 "void f() { int i; [i]{}; }",
210 DeclRefExprVisitor::Lang_CXX11));
213 TEST(RecursiveASTVisitor, VisitsUseOfImplicitLambdaCapture) {
214 DeclRefExprVisitor Visitor;
215 Visitor.ExpectMatch("i", 1, 24);
216 EXPECT_TRUE(Visitor.runOver(
217 "void f() { int i; [=]{ i; }; }",
218 DeclRefExprVisitor::Lang_CXX11));
221 TEST(RecursiveASTVisitor, VisitsImplicitLambdaCaptureInit) {
222 DeclRefExprVisitor Visitor;
223 Visitor.setShouldVisitImplicitCode(true);
224 // We're expecting the "i" in the lambda to be visited twice:
225 // - Once for the DeclRefExpr in the lambda capture initialization (whose
226 // source code location is set to the first use of the variable).
227 // - Once for the DeclRefExpr for the use of "i" inside the lambda.
228 Visitor.ExpectMatch("i", 1, 24, /*Times=*/2);
229 EXPECT_TRUE(Visitor.runOver(
230 "void f() { int i; [=]{ i; }; }",
231 DeclRefExprVisitor::Lang_CXX11));
234 TEST(RecursiveASTVisitor, VisitsLambdaInitCaptureInit) {
235 DeclRefExprVisitor Visitor;
236 Visitor.ExpectMatch("i", 1, 24);
237 EXPECT_TRUE(Visitor.runOver(
238 "void f() { int i; [a = i + 1]{}; }",
239 DeclRefExprVisitor::Lang_CXX14));
242 /* FIXME: According to Richard Smith this is a bug in the AST.
243 TEST(RecursiveASTVisitor, VisitsBaseClassTemplateArgumentsInInstantiation) {
244 DeclRefExprVisitor Visitor;
245 Visitor.ExpectMatch("x", 3, 43);
246 EXPECT_TRUE(Visitor.runOver(
247 "template <typename T> void x();\n"
248 "template <void (*T)()> class X {};\n"
249 "template <typename T> class Y : public X< x<T> > {};\n"
254 TEST(RecursiveASTVisitor, VisitsExtension) {
255 DeclRefExprVisitor Visitor;
256 Visitor.ExpectMatch("s", 1, 24);
257 EXPECT_TRUE(Visitor.runOver(
258 "int s = __extension__ (s);\n"));
261 TEST(RecursiveASTVisitor, VisitsCopyExprOfBlockDeclCapture) {
262 DeclRefExprVisitor Visitor;
263 Visitor.ExpectMatch("x", 3, 24);
264 EXPECT_TRUE(Visitor.runOver("void f(int(^)(int)); \n"
266 " f([&](int x){ return x; }); \n"
268 DeclRefExprVisitor::Lang_OBJCXX11));
271 } // end anonymous namespace