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llvm-project/clang/unittests/Tooling/Syntax/TokensTest.cpp

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//===- TokensTest.cpp -----------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "clang/Tooling/Syntax/Tokens.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/AST/Expr.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/DiagnosticIDs.h"
#include "clang/Basic/DiagnosticOptions.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/FileSystemOptions.h"
#include "clang/Basic/LLVM.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Basic/SourceLocation.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/TokenKinds.def"
#include "clang/Basic/TokenKinds.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/FrontendAction.h"
#include "clang/Frontend/Utils.h"
#include "clang/Lex/Lexer.h"
#include "clang/Lex/PreprocessorOptions.h"
#include "clang/Lex/Token.h"
#include "clang/Tooling/Tooling.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/IntrusiveRefCntPtr.h"
#include "llvm/ADT/None.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/FormatVariadic.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/VirtualFileSystem.h"
#include "llvm/Support/raw_os_ostream.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Testing/Support/Annotations.h"
#include "llvm/Testing/Support/SupportHelpers.h"
#include <cassert>
#include <cstdlib>
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include <memory>
#include <ostream>
#include <string>
using namespace clang;
using namespace clang::syntax;
using llvm::ValueIs;
using ::testing::AllOf;
using ::testing::Contains;
using ::testing::ElementsAre;
using ::testing::Field;
using ::testing::Matcher;
using ::testing::Not;
using ::testing::StartsWith;
namespace {
// Checks the passed ArrayRef<T> has the same begin() and end() iterators as the
// argument.
MATCHER_P(SameRange, A, "") {
return A.begin() == arg.begin() && A.end() == arg.end();
}
Matcher<TokenBuffer::Expansion>
IsExpansion(Matcher<llvm::ArrayRef<syntax::Token>> Spelled,
Matcher<llvm::ArrayRef<syntax::Token>> Expanded) {
return AllOf(Field(&TokenBuffer::Expansion::Spelled, Spelled),
Field(&TokenBuffer::Expansion::Expanded, Expanded));
}
// Matchers for syntax::Token.
MATCHER_P(Kind, K, "") { return arg.kind() == K; }
MATCHER_P2(HasText, Text, SourceMgr, "") {
return arg.text(*SourceMgr) == Text;
}
/// Checks the start and end location of a token are equal to SourceRng.
MATCHER_P(RangeIs, SourceRng, "") {
return arg.location() == SourceRng.first &&
arg.endLocation() == SourceRng.second;
}
class TokenCollectorTest : public ::testing::Test {
public:
/// Run the clang frontend, collect the preprocessed tokens from the frontend
/// invocation and store them in this->Buffer.
/// This also clears SourceManager before running the compiler.
void recordTokens(llvm::StringRef Code) {
class RecordTokens : public ASTFrontendAction {
public:
explicit RecordTokens(TokenBuffer &Result) : Result(Result) {}
bool BeginSourceFileAction(CompilerInstance &CI) override {
assert(!Collector && "expected only a single call to BeginSourceFile");
Collector.emplace(CI.getPreprocessor());
return true;
}
void EndSourceFileAction() override {
assert(Collector && "BeginSourceFileAction was never called");
Result = std::move(*Collector).consume();
}
std::unique_ptr<ASTConsumer>
CreateASTConsumer(CompilerInstance &CI, StringRef InFile) override {
return llvm::make_unique<ASTConsumer>();
}
private:
TokenBuffer &Result;
llvm::Optional<TokenCollector> Collector;
};
constexpr const char *FileName = "./input.cpp";
FS->addFile(FileName, time_t(), llvm::MemoryBuffer::getMemBufferCopy(""));
// Prepare to run a compiler.
if (!Diags->getClient())
Diags->setClient(new IgnoringDiagConsumer);
std::vector<const char *> Args = {"tok-test", "-std=c++03", "-fsyntax-only",
FileName};
auto CI = createInvocationFromCommandLine(Args, Diags, FS);
assert(CI);
CI->getFrontendOpts().DisableFree = false;
CI->getPreprocessorOpts().addRemappedFile(
FileName, llvm::MemoryBuffer::getMemBufferCopy(Code).release());
CompilerInstance Compiler;
Compiler.setInvocation(std::move(CI));
Compiler.setDiagnostics(Diags.get());
Compiler.setFileManager(FileMgr.get());
Compiler.setSourceManager(SourceMgr.get());
this->Buffer = TokenBuffer(*SourceMgr);
RecordTokens Recorder(this->Buffer);
ASSERT_TRUE(Compiler.ExecuteAction(Recorder))
<< "failed to run the frontend";
}
/// Record the tokens and return a test dump of the resulting buffer.
std::string collectAndDump(llvm::StringRef Code) {
recordTokens(Code);
return Buffer.dumpForTests();
}
// Adds a file to the test VFS.
void addFile(llvm::StringRef Path, llvm::StringRef Contents) {
if (!FS->addFile(Path, time_t(),
llvm::MemoryBuffer::getMemBufferCopy(Contents))) {
ADD_FAILURE() << "could not add a file to VFS: " << Path;
}
}
/// Add a new file, run syntax::tokenize() on it and return the results.
std::vector<syntax::Token> tokenize(llvm::StringRef Text) {
// FIXME: pass proper LangOptions.
return syntax::tokenize(
SourceMgr->createFileID(llvm::MemoryBuffer::getMemBufferCopy(Text)),
*SourceMgr, LangOptions());
}
// Specialized versions of matchers that hide the SourceManager from clients.
Matcher<syntax::Token> HasText(std::string Text) const {
return ::HasText(Text, SourceMgr.get());
}
Matcher<syntax::Token> RangeIs(llvm::Annotations::Range R) const {
std::pair<SourceLocation, SourceLocation> Ls;
Ls.first = SourceMgr->getLocForStartOfFile(SourceMgr->getMainFileID())
.getLocWithOffset(R.Begin);
Ls.second = SourceMgr->getLocForStartOfFile(SourceMgr->getMainFileID())
.getLocWithOffset(R.End);
return ::RangeIs(Ls);
}
/// Finds a subrange in O(n * m).
template <class T, class U, class Eq>
llvm::ArrayRef<T> findSubrange(llvm::ArrayRef<U> Subrange,
llvm::ArrayRef<T> Range, Eq F) {
for (auto Begin = Range.begin(); Begin < Range.end(); ++Begin) {
auto It = Begin;
for (auto ItSub = Subrange.begin();
ItSub != Subrange.end() && It != Range.end(); ++ItSub, ++It) {
if (!F(*ItSub, *It))
goto continue_outer;
}
return llvm::makeArrayRef(Begin, It);
continue_outer:;
}
return llvm::makeArrayRef(Range.end(), Range.end());
}
/// Finds a subrange in \p Tokens that match the tokens specified in \p Query.
/// The match should be unique. \p Query is a whitespace-separated list of
/// tokens to search for.
llvm::ArrayRef<syntax::Token>
findTokenRange(llvm::StringRef Query, llvm::ArrayRef<syntax::Token> Tokens) {
llvm::SmallVector<llvm::StringRef, 8> QueryTokens;
Query.split(QueryTokens, ' ', /*MaxSplit=*/-1, /*KeepEmpty=*/false);
if (QueryTokens.empty()) {
ADD_FAILURE() << "will not look for an empty list of tokens";
std::abort();
}
// An equality test for search.
auto TextMatches = [this](llvm::StringRef Q, const syntax::Token &T) {
return Q == T.text(*SourceMgr);
};
// Find a match.
auto Found =
findSubrange(llvm::makeArrayRef(QueryTokens), Tokens, TextMatches);
if (Found.begin() == Tokens.end()) {
ADD_FAILURE() << "could not find the subrange for " << Query;
std::abort();
}
// Check that the match is unique.
if (findSubrange(llvm::makeArrayRef(QueryTokens),
llvm::makeArrayRef(Found.end(), Tokens.end()), TextMatches)
.begin() != Tokens.end()) {
ADD_FAILURE() << "match is not unique for " << Query;
std::abort();
}
return Found;
};
// Specialized versions of findTokenRange for expanded and spelled tokens.
llvm::ArrayRef<syntax::Token> findExpanded(llvm::StringRef Query) {
return findTokenRange(Query, Buffer.expandedTokens());
}
llvm::ArrayRef<syntax::Token> findSpelled(llvm::StringRef Query,
FileID File = FileID()) {
if (!File.isValid())
File = SourceMgr->getMainFileID();
return findTokenRange(Query, Buffer.spelledTokens(File));
}
// Data fields.
llvm::IntrusiveRefCntPtr<DiagnosticsEngine> Diags =
new DiagnosticsEngine(new DiagnosticIDs, new DiagnosticOptions);
IntrusiveRefCntPtr<llvm::vfs::InMemoryFileSystem> FS =
new llvm::vfs::InMemoryFileSystem;
llvm::IntrusiveRefCntPtr<FileManager> FileMgr =
new FileManager(FileSystemOptions(), FS);
llvm::IntrusiveRefCntPtr<SourceManager> SourceMgr =
new SourceManager(*Diags, *FileMgr);
/// Contains last result of calling recordTokens().
TokenBuffer Buffer = TokenBuffer(*SourceMgr);
};
TEST_F(TokenCollectorTest, RawMode) {
EXPECT_THAT(tokenize("int main() {}"),
ElementsAre(Kind(tok::kw_int),
AllOf(HasText("main"), Kind(tok::identifier)),
Kind(tok::l_paren), Kind(tok::r_paren),
Kind(tok::l_brace), Kind(tok::r_brace)));
// Comments are ignored for now.
EXPECT_THAT(tokenize("/* foo */int a; // more comments"),
ElementsAre(Kind(tok::kw_int),
AllOf(HasText("a"), Kind(tok::identifier)),
Kind(tok::semi)));
}
TEST_F(TokenCollectorTest, Basic) {
std::pair</*Input*/ std::string, /*Expected*/ std::string> TestCases[] = {
{"int main() {}",
R"(expanded tokens:
int main ( ) { }
file './input.cpp'
spelled tokens:
int main ( ) { }
no mappings.
)"},
// All kinds of whitespace are ignored.
{"\t\n int\t\n main\t\n (\t\n )\t\n{\t\n }\t\n",
R"(expanded tokens:
int main ( ) { }
file './input.cpp'
spelled tokens:
int main ( ) { }
no mappings.
)"},
// Annotation tokens are ignored.
{R"cpp(
#pragma GCC visibility push (public)
#pragma GCC visibility pop
)cpp",
R"(expanded tokens:
<empty>
file './input.cpp'
spelled tokens:
# pragma GCC visibility push ( public ) # pragma GCC visibility pop
mappings:
['#'_0, '<eof>'_13) => ['<eof>'_0, '<eof>'_0)
)"},
// Empty files should not crash.
{R"cpp()cpp", R"(expanded tokens:
<empty>
file './input.cpp'
spelled tokens:
<empty>
no mappings.
)"},
// Should not crash on errors inside '#define' directives. Error is that
// stringification (#B) does not refer to a macro parameter.
{
R"cpp(
a
#define MACRO() A #B
)cpp",
R"(expanded tokens:
a
file './input.cpp'
spelled tokens:
a # define MACRO ( ) A # B
mappings:
['#'_1, '<eof>'_9) => ['<eof>'_1, '<eof>'_1)
)"}};
for (auto &Test : TestCases)
EXPECT_EQ(collectAndDump(Test.first), Test.second)
<< collectAndDump(Test.first);
}
TEST_F(TokenCollectorTest, Locations) {
// Check locations of the tokens.
llvm::Annotations Code(R"cpp(
$r1[[int]] $r2[[a]] $r3[[=]] $r4[["foo bar baz"]] $r5[[;]]
)cpp");
recordTokens(Code.code());
// Check expanded tokens.
EXPECT_THAT(
Buffer.expandedTokens(),
ElementsAre(AllOf(Kind(tok::kw_int), RangeIs(Code.range("r1"))),
AllOf(Kind(tok::identifier), RangeIs(Code.range("r2"))),
AllOf(Kind(tok::equal), RangeIs(Code.range("r3"))),
AllOf(Kind(tok::string_literal), RangeIs(Code.range("r4"))),
AllOf(Kind(tok::semi), RangeIs(Code.range("r5"))),
Kind(tok::eof)));
// Check spelled tokens.
EXPECT_THAT(
Buffer.spelledTokens(SourceMgr->getMainFileID()),
ElementsAre(AllOf(Kind(tok::kw_int), RangeIs(Code.range("r1"))),
AllOf(Kind(tok::identifier), RangeIs(Code.range("r2"))),
AllOf(Kind(tok::equal), RangeIs(Code.range("r3"))),
AllOf(Kind(tok::string_literal), RangeIs(Code.range("r4"))),
AllOf(Kind(tok::semi), RangeIs(Code.range("r5")))));
}
TEST_F(TokenCollectorTest, MacroDirectives) {
// Macro directives are not stored anywhere at the moment.
std::string Code = R"cpp(
#define FOO a
#include "unresolved_file.h"
#undef FOO
#ifdef X
#else
#endif
#ifndef Y
#endif
#if 1
#elif 2
#else
#endif
#pragma once
#pragma something lalala
int a;
)cpp";
std::string Expected =
"expanded tokens:\n"
" int a ;\n"
"file './input.cpp'\n"
" spelled tokens:\n"
" # define FOO a # include \"unresolved_file.h\" # undef FOO "
"# ifdef X # else # endif # ifndef Y # endif # if 1 # elif 2 # else "
"# endif # pragma once # pragma something lalala int a ;\n"
" mappings:\n"
" ['#'_0, 'int'_39) => ['int'_0, 'int'_0)\n";
EXPECT_EQ(collectAndDump(Code), Expected);
}
TEST_F(TokenCollectorTest, MacroReplacements) {
std::pair</*Input*/ std::string, /*Expected*/ std::string> TestCases[] = {
// A simple object-like macro.
{R"cpp(
#define INT int const
INT a;
)cpp",
R"(expanded tokens:
int const a ;
file './input.cpp'
spelled tokens:
# define INT int const INT a ;
mappings:
['#'_0, 'INT'_5) => ['int'_0, 'int'_0)
['INT'_5, 'a'_6) => ['int'_0, 'a'_2)
)"},
// A simple function-like macro.
{R"cpp(
#define INT(a) const int
INT(10+10) a;
)cpp",
R"(expanded tokens:
const int a ;
file './input.cpp'
spelled tokens:
# define INT ( a ) const int INT ( 10 + 10 ) a ;
mappings:
['#'_0, 'INT'_8) => ['const'_0, 'const'_0)
['INT'_8, 'a'_14) => ['const'_0, 'a'_2)
)"},
// Recursive macro replacements.
{R"cpp(
#define ID(X) X
#define INT int const
ID(ID(INT)) a;
)cpp",
R"(expanded tokens:
int const a ;
file './input.cpp'
spelled tokens:
# define ID ( X ) X # define INT int const ID ( ID ( INT ) ) a ;
mappings:
['#'_0, 'ID'_12) => ['int'_0, 'int'_0)
['ID'_12, 'a'_19) => ['int'_0, 'a'_2)
)"},
// A little more complicated recursive macro replacements.
{R"cpp(
#define ADD(X, Y) X+Y
#define MULT(X, Y) X*Y
int a = ADD(MULT(1,2), MULT(3,ADD(4,5)));
)cpp",
"expanded tokens:\n"
" int a = 1 * 2 + 3 * 4 + 5 ;\n"
"file './input.cpp'\n"
" spelled tokens:\n"
" # define ADD ( X , Y ) X + Y # define MULT ( X , Y ) X * Y int "
"a = ADD ( MULT ( 1 , 2 ) , MULT ( 3 , ADD ( 4 , 5 ) ) ) ;\n"
" mappings:\n"
" ['#'_0, 'int'_22) => ['int'_0, 'int'_0)\n"
" ['ADD'_25, ';'_46) => ['1'_3, ';'_12)\n"},
// Empty macro replacement.
// FIXME: the #define directives should not be glued together.
{R"cpp(
#define EMPTY
#define EMPTY_FUNC(X)
EMPTY
EMPTY_FUNC(1+2+3)
)cpp",
R"(expanded tokens:
<empty>
file './input.cpp'
spelled tokens:
# define EMPTY # define EMPTY_FUNC ( X ) EMPTY EMPTY_FUNC ( 1 + 2 + 3 )
mappings:
['#'_0, 'EMPTY'_9) => ['<eof>'_0, '<eof>'_0)
['EMPTY'_9, 'EMPTY_FUNC'_10) => ['<eof>'_0, '<eof>'_0)
['EMPTY_FUNC'_10, '<eof>'_18) => ['<eof>'_0, '<eof>'_0)
)"},
// File ends with a macro replacement.
{R"cpp(
#define FOO 10+10;
int a = FOO
)cpp",
R"(expanded tokens:
int a = 10 + 10 ;
file './input.cpp'
spelled tokens:
# define FOO 10 + 10 ; int a = FOO
mappings:
['#'_0, 'int'_7) => ['int'_0, 'int'_0)
['FOO'_10, '<eof>'_11) => ['10'_3, '<eof>'_7)
)"}};
for (auto &Test : TestCases)
EXPECT_EQ(Test.second, collectAndDump(Test.first))
<< collectAndDump(Test.first);
}
TEST_F(TokenCollectorTest, SpecialTokens) {
// Tokens coming from concatenations.
recordTokens(R"cpp(
#define CONCAT(a, b) a ## b
int a = CONCAT(1, 2);
)cpp");
EXPECT_THAT(std::vector<syntax::Token>(Buffer.expandedTokens()),
Contains(HasText("12")));
// Multi-line tokens with slashes at the end.
recordTokens("i\\\nn\\\nt");
EXPECT_THAT(Buffer.expandedTokens(),
ElementsAre(AllOf(Kind(tok::kw_int), HasText("i\\\nn\\\nt")),
Kind(tok::eof)));
// FIXME: test tokens with digraphs and UCN identifiers.
}
TEST_F(TokenCollectorTest, LateBoundTokens) {
// The parser eventually breaks the first '>>' into two tokens ('>' and '>'),
// but we choose to record them as a single token (for now).
llvm::Annotations Code(R"cpp(
template <class T>
struct foo { int a; };
int bar = foo<foo<int$br[[>>]]().a;
int baz = 10 $op[[>>]] 2;
)cpp");
recordTokens(Code.code());
EXPECT_THAT(std::vector<syntax::Token>(Buffer.expandedTokens()),
AllOf(Contains(AllOf(Kind(tok::greatergreater),
RangeIs(Code.range("br")))),
Contains(AllOf(Kind(tok::greatergreater),
RangeIs(Code.range("op"))))));
}
TEST_F(TokenCollectorTest, DelayedParsing) {
llvm::StringLiteral Code = R"cpp(
struct Foo {
int method() {
// Parser will visit method bodies and initializers multiple times, but
// TokenBuffer should only record the first walk over the tokens;
return 100;
}
int a = 10;
struct Subclass {
void foo() {
Foo().method();
}
};
};
)cpp";
std::string ExpectedTokens =
"expanded tokens:\n"
" struct Foo { int method ( ) { return 100 ; } int a = 10 ; struct "
"Subclass { void foo ( ) { Foo ( ) . method ( ) ; } } ; } ;\n";
EXPECT_THAT(collectAndDump(Code), StartsWith(ExpectedTokens));
}
TEST_F(TokenCollectorTest, MultiFile) {
addFile("./foo.h", R"cpp(
#define ADD(X, Y) X+Y
int a = 100;
#include "bar.h"
)cpp");
addFile("./bar.h", R"cpp(
int b = ADD(1, 2);
#define MULT(X, Y) X*Y
)cpp");
llvm::StringLiteral Code = R"cpp(
#include "foo.h"
int c = ADD(1, MULT(2,3));
)cpp";
std::string Expected = R"(expanded tokens:
int a = 100 ; int b = 1 + 2 ; int c = 1 + 2 * 3 ;
file './input.cpp'
spelled tokens:
# include "foo.h" int c = ADD ( 1 , MULT ( 2 , 3 ) ) ;
mappings:
['#'_0, 'int'_3) => ['int'_12, 'int'_12)
['ADD'_6, ';'_17) => ['1'_15, ';'_20)
file './foo.h'
spelled tokens:
# define ADD ( X , Y ) X + Y int a = 100 ; # include "bar.h"
mappings:
['#'_0, 'int'_11) => ['int'_0, 'int'_0)
['#'_16, '<eof>'_19) => ['int'_5, 'int'_5)
file './bar.h'
spelled tokens:
int b = ADD ( 1 , 2 ) ; # define MULT ( X , Y ) X * Y
mappings:
['ADD'_3, ';'_9) => ['1'_8, ';'_11)
['#'_10, '<eof>'_21) => ['int'_12, 'int'_12)
)";
EXPECT_EQ(Expected, collectAndDump(Code))
<< "input: " << Code << "\nresults: " << collectAndDump(Code);
}
class TokenBufferTest : public TokenCollectorTest {};
TEST_F(TokenBufferTest, SpelledByExpanded) {
recordTokens(R"cpp(
a1 a2 a3 b1 b2
)cpp");
// Sanity check: expanded and spelled tokens are stored separately.
EXPECT_THAT(findExpanded("a1 a2"), Not(SameRange(findSpelled("a1 a2"))));
// Searching for subranges of expanded tokens should give the corresponding
// spelled ones.
EXPECT_THAT(Buffer.spelledForExpanded(findExpanded("a1 a2 a3 b1 b2")),
ValueIs(SameRange(findSpelled("a1 a2 a3 b1 b2"))));
EXPECT_THAT(Buffer.spelledForExpanded(findExpanded("a1 a2 a3")),
ValueIs(SameRange(findSpelled("a1 a2 a3"))));
EXPECT_THAT(Buffer.spelledForExpanded(findExpanded("b1 b2")),
ValueIs(SameRange(findSpelled("b1 b2"))));
// Test search on simple macro expansions.
recordTokens(R"cpp(
#define A a1 a2 a3
#define B b1 b2
A split B
)cpp");
EXPECT_THAT(Buffer.spelledForExpanded(findExpanded("a1 a2 a3 split b1 b2")),
ValueIs(SameRange(findSpelled("A split B"))));
EXPECT_THAT(Buffer.spelledForExpanded(findExpanded("a1 a2 a3")),
ValueIs(SameRange(findSpelled("A split").drop_back())));
EXPECT_THAT(Buffer.spelledForExpanded(findExpanded("b1 b2")),
ValueIs(SameRange(findSpelled("split B").drop_front())));
// Ranges not fully covering macro invocations should fail.
EXPECT_EQ(Buffer.spelledForExpanded(findExpanded("a1 a2")), llvm::None);
EXPECT_EQ(Buffer.spelledForExpanded(findExpanded("b2")), llvm::None);
EXPECT_EQ(Buffer.spelledForExpanded(findExpanded("a2 a3 split b1 b2")),
llvm::None);
// Recursive macro invocations.
recordTokens(R"cpp(
#define ID(x) x
#define B b1 b2
ID(ID(ID(a1) a2 a3)) split ID(B)
)cpp");
EXPECT_THAT(Buffer.spelledForExpanded(findExpanded("a1 a2 a3")),
ValueIs(SameRange(findSpelled("ID ( ID ( ID ( a1 ) a2 a3 ) )"))));
EXPECT_THAT(Buffer.spelledForExpanded(findExpanded("b1 b2")),
ValueIs(SameRange(findSpelled("ID ( B )"))));
EXPECT_THAT(Buffer.spelledForExpanded(findExpanded("a1 a2 a3 split b1 b2")),
ValueIs(SameRange(findSpelled(
"ID ( ID ( ID ( a1 ) a2 a3 ) ) split ID ( B )"))));
// Ranges crossing macro call boundaries.
EXPECT_EQ(Buffer.spelledForExpanded(findExpanded("a1 a2 a3 split b1")),
llvm::None);
EXPECT_EQ(Buffer.spelledForExpanded(findExpanded("a2 a3 split b1")),
llvm::None);
// FIXME: next two examples should map to macro arguments, but currently they
// fail.
EXPECT_EQ(Buffer.spelledForExpanded(findExpanded("a2")), llvm::None);
EXPECT_EQ(Buffer.spelledForExpanded(findExpanded("a1 a2")), llvm::None);
// Empty macro expansions.
recordTokens(R"cpp(
#define EMPTY
#define ID(X) X
EMPTY EMPTY ID(1 2 3) EMPTY EMPTY split1
EMPTY EMPTY ID(4 5 6) split2
ID(7 8 9) EMPTY EMPTY
)cpp");
EXPECT_THAT(Buffer.spelledForExpanded(findExpanded("1 2 3")),
ValueIs(SameRange(findSpelled("ID ( 1 2 3 )"))));
EXPECT_THAT(Buffer.spelledForExpanded(findExpanded("4 5 6")),
ValueIs(SameRange(findSpelled("ID ( 4 5 6 )"))));
EXPECT_THAT(Buffer.spelledForExpanded(findExpanded("7 8 9")),
ValueIs(SameRange(findSpelled("ID ( 7 8 9 )"))));
// Empty mappings coming from various directives.
recordTokens(R"cpp(
#define ID(X) X
ID(1)
#pragma lalala
not_mapped
)cpp");
EXPECT_THAT(Buffer.spelledForExpanded(findExpanded("not_mapped")),
ValueIs(SameRange(findSpelled("not_mapped"))));
}
TEST_F(TokenBufferTest, ExpansionStartingAt) {
// Object-like macro expansions.
recordTokens(R"cpp(
#define FOO 3+4
int a = FOO 1;
int b = FOO 2;
)cpp");
llvm::ArrayRef<syntax::Token> Foo1 = findSpelled("FOO 1").drop_back();
EXPECT_THAT(
Buffer.expansionStartingAt(Foo1.data()),
ValueIs(IsExpansion(SameRange(Foo1),
SameRange(findExpanded("3 + 4 1").drop_back()))));
llvm::ArrayRef<syntax::Token> Foo2 = findSpelled("FOO 2").drop_back();
EXPECT_THAT(
Buffer.expansionStartingAt(Foo2.data()),
ValueIs(IsExpansion(SameRange(Foo2),
SameRange(findExpanded("3 + 4 2").drop_back()))));
// Function-like macro expansions.
recordTokens(R"cpp(
#define ID(X) X
int a = ID(1+2+3);
int b = ID(ID(2+3+4));
)cpp");
llvm::ArrayRef<syntax::Token> ID1 = findSpelled("ID ( 1 + 2 + 3 )");
EXPECT_THAT(Buffer.expansionStartingAt(&ID1.front()),
ValueIs(IsExpansion(SameRange(ID1),
SameRange(findExpanded("1 + 2 + 3")))));
// Only the first spelled token should be found.
for (const auto &T : ID1.drop_front())
EXPECT_EQ(Buffer.expansionStartingAt(&T), llvm::None);
llvm::ArrayRef<syntax::Token> ID2 = findSpelled("ID ( ID ( 2 + 3 + 4 ) )");
EXPECT_THAT(Buffer.expansionStartingAt(&ID2.front()),
ValueIs(IsExpansion(SameRange(ID2),
SameRange(findExpanded("2 + 3 + 4")))));
// Only the first spelled token should be found.
for (const auto &T : ID2.drop_front())
EXPECT_EQ(Buffer.expansionStartingAt(&T), llvm::None);
// PP directives.
recordTokens(R"cpp(
#define FOO 1
int a = FOO;
#pragma once
int b = 1;
)cpp");
llvm::ArrayRef<syntax::Token> DefineFoo = findSpelled("# define FOO 1");
EXPECT_THAT(
Buffer.expansionStartingAt(&DefineFoo.front()),
ValueIs(IsExpansion(SameRange(DefineFoo),
SameRange(findExpanded("int a").take_front(0)))));
// Only the first spelled token should be found.
for (const auto &T : DefineFoo.drop_front())
EXPECT_EQ(Buffer.expansionStartingAt(&T), llvm::None);
llvm::ArrayRef<syntax::Token> PragmaOnce = findSpelled("# pragma once");
EXPECT_THAT(
Buffer.expansionStartingAt(&PragmaOnce.front()),
ValueIs(IsExpansion(SameRange(PragmaOnce),
SameRange(findExpanded("int b").take_front(0)))));
// Only the first spelled token should be found.
for (const auto &T : PragmaOnce.drop_front())
EXPECT_EQ(Buffer.expansionStartingAt(&T), llvm::None);
}
TEST_F(TokenBufferTest, TokensToFileRange) {
addFile("./foo.h", "token_from_header");
llvm::Annotations Code(R"cpp(
#define FOO token_from_expansion
#include "./foo.h"
$all[[$i[[int]] a = FOO;]]
)cpp");
recordTokens(Code.code());
auto &SM = *SourceMgr;
// Two simple examples.
auto Int = findExpanded("int").front();
auto Semi = findExpanded(";").front();
EXPECT_EQ(Int.range(SM), FileRange(SM.getMainFileID(), Code.range("i").Begin,
Code.range("i").End));
EXPECT_EQ(syntax::Token::range(SM, Int, Semi),
FileRange(SM.getMainFileID(), Code.range("all").Begin,
Code.range("all").End));
// We don't test assertion failures because death tests are slow.
}
} // namespace
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