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FormatTest.cpp
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FormatTest.cpp
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//===- unittest/Format/FormatTest.cpp - Formatting unit tests -------------===//
//
// 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/Format/Format.h"
#include "../Tooling/ReplacementTest.h"
#include "FormatTestUtils.h"
#include "clang/Frontend/TextDiagnosticPrinter.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MemoryBuffer.h"
#include "gtest/gtest.h"
#define DEBUG_TYPE "format-test"
using clang::tooling::ReplacementTest;
using clang::tooling::toReplacements;
namespace clang {
namespace format {
namespace {
FormatStyle getGoogleStyle() { return getGoogleStyle(FormatStyle::LK_Cpp); }
class FormatTest : public ::testing::Test {
protected:
enum StatusCheck {
SC_ExpectComplete,
SC_ExpectIncomplete,
SC_DoNotCheck
};
std::string format(llvm::StringRef Code,
const FormatStyle &Style = getLLVMStyle(),
StatusCheck CheckComplete = SC_ExpectComplete) {
LLVM_DEBUG(llvm::errs() << "---\n");
LLVM_DEBUG(llvm::errs() << Code << "\n\n");
std::vector<tooling::Range> Ranges(1, tooling::Range(0, Code.size()));
FormattingAttemptStatus Status;
tooling::Replacements Replaces =
reformat(Style, Code, Ranges, "<stdin>", &Status);
if (CheckComplete != SC_DoNotCheck) {
bool ExpectedCompleteFormat = CheckComplete == SC_ExpectComplete;
EXPECT_EQ(ExpectedCompleteFormat, Status.FormatComplete)
<< Code << "\n\n";
}
ReplacementCount = Replaces.size();
auto Result = applyAllReplacements(Code, Replaces);
EXPECT_TRUE(static_cast<bool>(Result));
LLVM_DEBUG(llvm::errs() << "\n" << *Result << "\n\n");
return *Result;
}
FormatStyle getStyleWithColumns(FormatStyle Style, unsigned ColumnLimit) {
Style.ColumnLimit = ColumnLimit;
return Style;
}
FormatStyle getLLVMStyleWithColumns(unsigned ColumnLimit) {
return getStyleWithColumns(getLLVMStyle(), ColumnLimit);
}
FormatStyle getGoogleStyleWithColumns(unsigned ColumnLimit) {
return getStyleWithColumns(getGoogleStyle(), ColumnLimit);
}
void verifyFormat(llvm::StringRef Expected, llvm::StringRef Code,
const FormatStyle &Style = getLLVMStyle()) {
EXPECT_EQ(Expected.str(), format(Expected, Style))
<< "Expected code is not stable";
EXPECT_EQ(Expected.str(), format(Code, Style));
if (Style.Language == FormatStyle::LK_Cpp) {
// Objective-C++ is a superset of C++, so everything checked for C++
// needs to be checked for Objective-C++ as well.
FormatStyle ObjCStyle = Style;
ObjCStyle.Language = FormatStyle::LK_ObjC;
EXPECT_EQ(Expected.str(), format(test::messUp(Code), ObjCStyle));
}
}
void verifyFormat(llvm::StringRef Code,
const FormatStyle &Style = getLLVMStyle()) {
verifyFormat(Code, test::messUp(Code), Style);
}
void verifyIncompleteFormat(llvm::StringRef Code,
const FormatStyle &Style = getLLVMStyle()) {
EXPECT_EQ(Code.str(),
format(test::messUp(Code), Style, SC_ExpectIncomplete));
}
void verifyGoogleFormat(llvm::StringRef Code) {
verifyFormat(Code, getGoogleStyle());
}
void verifyIndependentOfContext(llvm::StringRef text) {
verifyFormat(text);
verifyFormat(llvm::Twine("void f() { " + text + " }").str());
}
/// \brief Verify that clang-format does not crash on the given input.
void verifyNoCrash(llvm::StringRef Code,
const FormatStyle &Style = getLLVMStyle()) {
format(Code, Style, SC_DoNotCheck);
}
int ReplacementCount;
};
TEST_F(FormatTest, MessUp) {
EXPECT_EQ("1 2 3", test::messUp("1 2 3"));
EXPECT_EQ("1 2 3\n", test::messUp("1\n2\n3\n"));
EXPECT_EQ("a\n//b\nc", test::messUp("a\n//b\nc"));
EXPECT_EQ("a\n#b\nc", test::messUp("a\n#b\nc"));
EXPECT_EQ("a\n#b c d\ne", test::messUp("a\n#b\\\nc\\\nd\ne"));
}
TEST_F(FormatTest, DefaultLLVMStyleIsCpp) {
EXPECT_EQ(FormatStyle::LK_Cpp, getLLVMStyle().Language);
}
TEST_F(FormatTest, LLVMStyleOverride) {
EXPECT_EQ(FormatStyle::LK_Proto,
getLLVMStyle(FormatStyle::LK_Proto).Language);
}
//===----------------------------------------------------------------------===//
// Basic function tests.
//===----------------------------------------------------------------------===//
TEST_F(FormatTest, DoesNotChangeCorrectlyFormattedCode) {
EXPECT_EQ(";", format(";"));
}
TEST_F(FormatTest, FormatsGlobalStatementsAt0) {
EXPECT_EQ("int i;", format(" int i;"));
EXPECT_EQ("\nint i;", format(" \n\t \v \f int i;"));
EXPECT_EQ("int i;\nint j;", format(" int i; int j;"));
EXPECT_EQ("int i;\nint j;", format(" int i;\n int j;"));
}
TEST_F(FormatTest, FormatsUnwrappedLinesAtFirstFormat) {
EXPECT_EQ("int i;", format("int\ni;"));
}
TEST_F(FormatTest, FormatsNestedBlockStatements) {
EXPECT_EQ("{\n {\n {}\n }\n}", format("{{{}}}"));
}
TEST_F(FormatTest, FormatsNestedCall) {
verifyFormat("Method(f1, f2(f3));");
verifyFormat("Method(f1(f2, f3()));");
verifyFormat("Method(f1(f2, (f3())));");
}
TEST_F(FormatTest, NestedNameSpecifiers) {
verifyFormat("vector<::Type> v;");
verifyFormat("::ns::SomeFunction(::ns::SomeOtherFunction())");
verifyFormat("static constexpr bool Bar = decltype(bar())::value;");
verifyFormat("bool a = 2 < ::SomeFunction();");
verifyFormat("ALWAYS_INLINE ::std::string getName();");
verifyFormat("some::string getName();");
}
TEST_F(FormatTest, OnlyGeneratesNecessaryReplacements) {
EXPECT_EQ("if (a) {\n"
" f();\n"
"}",
format("if(a){f();}"));
EXPECT_EQ(4, ReplacementCount);
EXPECT_EQ("if (a) {\n"
" f();\n"
"}",
format("if (a) {\n"
" f();\n"
"}"));
EXPECT_EQ(0, ReplacementCount);
EXPECT_EQ("/*\r\n"
"\r\n"
"*/\r\n",
format("/*\r\n"
"\r\n"
"*/\r\n"));
EXPECT_EQ(0, ReplacementCount);
}
TEST_F(FormatTest, RemovesEmptyLines) {
EXPECT_EQ("class C {\n"
" int i;\n"
"};",
format("class C {\n"
" int i;\n"
"\n"
"};"));
// Don't remove empty lines at the start of namespaces or extern "C" blocks.
EXPECT_EQ("namespace N {\n"
"\n"
"int i;\n"
"}",
format("namespace N {\n"
"\n"
"int i;\n"
"}",
getGoogleStyle()));
EXPECT_EQ("/* something */ namespace N {\n"
"\n"
"int i;\n"
"}",
format("/* something */ namespace N {\n"
"\n"
"int i;\n"
"}",
getGoogleStyle()));
EXPECT_EQ("inline namespace N {\n"
"\n"
"int i;\n"
"}",
format("inline namespace N {\n"
"\n"
"int i;\n"
"}",
getGoogleStyle()));
EXPECT_EQ("/* something */ inline namespace N {\n"
"\n"
"int i;\n"
"}",
format("/* something */ inline namespace N {\n"
"\n"
"int i;\n"
"}",
getGoogleStyle()));
EXPECT_EQ("export namespace N {\n"
"\n"
"int i;\n"
"}",
format("export namespace N {\n"
"\n"
"int i;\n"
"}",
getGoogleStyle()));
EXPECT_EQ("extern /**/ \"C\" /**/ {\n"
"\n"
"int i;\n"
"}",
format("extern /**/ \"C\" /**/ {\n"
"\n"
"int i;\n"
"}",
getGoogleStyle()));
// ...but do keep inlining and removing empty lines for non-block extern "C"
// functions.
verifyFormat("extern \"C\" int f() { return 42; }", getGoogleStyle());
EXPECT_EQ("extern \"C\" int f() {\n"
" int i = 42;\n"
" return i;\n"
"}",
format("extern \"C\" int f() {\n"
"\n"
" int i = 42;\n"
" return i;\n"
"}",
getGoogleStyle()));
// Remove empty lines at the beginning and end of blocks.
EXPECT_EQ("void f() {\n"
"\n"
" if (a) {\n"
"\n"
" f();\n"
" }\n"
"}",
format("void f() {\n"
"\n"
" if (a) {\n"
"\n"
" f();\n"
"\n"
" }\n"
"\n"
"}",
getLLVMStyle()));
EXPECT_EQ("void f() {\n"
" if (a) {\n"
" f();\n"
" }\n"
"}",
format("void f() {\n"
"\n"
" if (a) {\n"
"\n"
" f();\n"
"\n"
" }\n"
"\n"
"}",
getGoogleStyle()));
// Don't remove empty lines in more complex control statements.
EXPECT_EQ("void f() {\n"
" if (a) {\n"
" f();\n"
"\n"
" } else if (b) {\n"
" f();\n"
" }\n"
"}",
format("void f() {\n"
" if (a) {\n"
" f();\n"
"\n"
" } else if (b) {\n"
" f();\n"
"\n"
" }\n"
"\n"
"}"));
// Don't remove empty lines before namespace endings.
FormatStyle LLVMWithNoNamespaceFix = getLLVMStyle();
LLVMWithNoNamespaceFix.FixNamespaceComments = false;
EXPECT_EQ("namespace {\n"
"int i;\n"
"\n"
"}",
format("namespace {\n"
"int i;\n"
"\n"
"}", LLVMWithNoNamespaceFix));
EXPECT_EQ("namespace {\n"
"int i;\n"
"}",
format("namespace {\n"
"int i;\n"
"}", LLVMWithNoNamespaceFix));
EXPECT_EQ("namespace {\n"
"int i;\n"
"\n"
"};",
format("namespace {\n"
"int i;\n"
"\n"
"};", LLVMWithNoNamespaceFix));
EXPECT_EQ("namespace {\n"
"int i;\n"
"};",
format("namespace {\n"
"int i;\n"
"};", LLVMWithNoNamespaceFix));
EXPECT_EQ("namespace {\n"
"int i;\n"
"\n"
"}",
format("namespace {\n"
"int i;\n"
"\n"
"}"));
EXPECT_EQ("namespace {\n"
"int i;\n"
"\n"
"} // namespace",
format("namespace {\n"
"int i;\n"
"\n"
"} // namespace"));
FormatStyle Style = getLLVMStyle();
Style.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_All;
Style.MaxEmptyLinesToKeep = 2;
Style.BreakBeforeBraces = FormatStyle::BS_Custom;
Style.BraceWrapping.AfterClass = true;
Style.BraceWrapping.AfterFunction = true;
Style.KeepEmptyLinesAtTheStartOfBlocks = false;
EXPECT_EQ("class Foo\n"
"{\n"
" Foo() {}\n"
"\n"
" void funk() {}\n"
"};",
format("class Foo\n"
"{\n"
" Foo()\n"
" {\n"
" }\n"
"\n"
" void funk() {}\n"
"};",
Style));
}
TEST_F(FormatTest, RecognizesBinaryOperatorKeywords) {
verifyFormat("x = (a) and (b);");
verifyFormat("x = (a) or (b);");
verifyFormat("x = (a) bitand (b);");
verifyFormat("x = (a) bitor (b);");
verifyFormat("x = (a) not_eq (b);");
verifyFormat("x = (a) and_eq (b);");
verifyFormat("x = (a) or_eq (b);");
verifyFormat("x = (a) xor (b);");
}
TEST_F(FormatTest, RecognizesUnaryOperatorKeywords) {
verifyFormat("x = compl(a);");
verifyFormat("x = not(a);");
verifyFormat("x = bitand(a);");
// Unary operator must not be merged with the next identifier
verifyFormat("x = compl a;");
verifyFormat("x = not a;");
verifyFormat("x = bitand a;");
}
//===----------------------------------------------------------------------===//
// Tests for control statements.
//===----------------------------------------------------------------------===//
TEST_F(FormatTest, FormatIfWithoutCompoundStatement) {
verifyFormat("if (true)\n f();\ng();");
verifyFormat("if (a)\n if (b)\n if (c)\n g();\nh();");
verifyFormat("if (a)\n if (b) {\n f();\n }\ng();");
verifyFormat("if constexpr (true)\n"
" f();\ng();");
verifyFormat("if CONSTEXPR (true)\n"
" f();\ng();");
verifyFormat("if constexpr (a)\n"
" if constexpr (b)\n"
" if constexpr (c)\n"
" g();\n"
"h();");
verifyFormat("if CONSTEXPR (a)\n"
" if CONSTEXPR (b)\n"
" if CONSTEXPR (c)\n"
" g();\n"
"h();");
verifyFormat("if constexpr (a)\n"
" if constexpr (b) {\n"
" f();\n"
" }\n"
"g();");
verifyFormat("if CONSTEXPR (a)\n"
" if CONSTEXPR (b) {\n"
" f();\n"
" }\n"
"g();");
FormatStyle AllowsMergedIf = getLLVMStyle();
AllowsMergedIf.AlignEscapedNewlines = FormatStyle::ENAS_Left;
AllowsMergedIf.AllowShortIfStatementsOnASingleLine =
FormatStyle::SIS_WithoutElse;
verifyFormat("if (a)\n"
" // comment\n"
" f();",
AllowsMergedIf);
verifyFormat("{\n"
" if (a)\n"
" label:\n"
" f();\n"
"}",
AllowsMergedIf);
verifyFormat("#define A \\\n"
" if (a) \\\n"
" label: \\\n"
" f()",
AllowsMergedIf);
verifyFormat("if (a)\n"
" ;",
AllowsMergedIf);
verifyFormat("if (a)\n"
" if (b) return;",
AllowsMergedIf);
verifyFormat("if (a) // Can't merge this\n"
" f();\n",
AllowsMergedIf);
verifyFormat("if (a) /* still don't merge */\n"
" f();",
AllowsMergedIf);
verifyFormat("if (a) { // Never merge this\n"
" f();\n"
"}",
AllowsMergedIf);
verifyFormat("if (a) { /* Never merge this */\n"
" f();\n"
"}",
AllowsMergedIf);
AllowsMergedIf.ColumnLimit = 14;
verifyFormat("if (a) return;", AllowsMergedIf);
verifyFormat("if (aaaaaaaaa)\n"
" return;",
AllowsMergedIf);
AllowsMergedIf.ColumnLimit = 13;
verifyFormat("if (a)\n return;", AllowsMergedIf);
}
TEST_F(FormatTest, FormatIfWithoutCompoundStatementButElseWith) {
FormatStyle AllowsMergedIf = getLLVMStyle();
AllowsMergedIf.AlignEscapedNewlines = FormatStyle::ENAS_Left;
AllowsMergedIf.AllowShortIfStatementsOnASingleLine =
FormatStyle::SIS_WithoutElse;
verifyFormat("if (a)\n"
" f();\n"
"else {\n"
" g();\n"
"}",
AllowsMergedIf);
verifyFormat("if (a)\n"
" f();\n"
"else\n"
" g();\n",
AllowsMergedIf);
AllowsMergedIf.AllowShortIfStatementsOnASingleLine = FormatStyle::SIS_Always;
verifyFormat("if (a) f();\n"
"else {\n"
" g();\n"
"}",
AllowsMergedIf);
verifyFormat("if (a) f();\n"
"else {\n"
" if (a) f();\n"
" else {\n"
" g();\n"
" }\n"
" g();\n"
"}",
AllowsMergedIf);
}
TEST_F(FormatTest, FormatLoopsWithoutCompoundStatement) {
FormatStyle AllowsMergedLoops = getLLVMStyle();
AllowsMergedLoops.AllowShortLoopsOnASingleLine = true;
verifyFormat("while (true) continue;", AllowsMergedLoops);
verifyFormat("for (;;) continue;", AllowsMergedLoops);
verifyFormat("for (int &v : vec) v *= 2;", AllowsMergedLoops);
verifyFormat("while (true)\n"
" ;",
AllowsMergedLoops);
verifyFormat("for (;;)\n"
" ;",
AllowsMergedLoops);
verifyFormat("for (;;)\n"
" for (;;) continue;",
AllowsMergedLoops);
verifyFormat("for (;;) // Can't merge this\n"
" continue;",
AllowsMergedLoops);
verifyFormat("for (;;) /* still don't merge */\n"
" continue;",
AllowsMergedLoops);
}
TEST_F(FormatTest, FormatShortBracedStatements) {
FormatStyle AllowSimpleBracedStatements = getLLVMStyle();
AllowSimpleBracedStatements.ColumnLimit = 40;
AllowSimpleBracedStatements.AllowShortBlocksOnASingleLine =
FormatStyle::SBS_Always;
AllowSimpleBracedStatements.AllowShortIfStatementsOnASingleLine =
FormatStyle::SIS_WithoutElse;
AllowSimpleBracedStatements.AllowShortLoopsOnASingleLine = true;
AllowSimpleBracedStatements.BreakBeforeBraces = FormatStyle::BS_Custom;
AllowSimpleBracedStatements.BraceWrapping.AfterFunction = true;
AllowSimpleBracedStatements.BraceWrapping.SplitEmptyRecord = false;
verifyFormat("if (true) {}", AllowSimpleBracedStatements);
verifyFormat("if constexpr (true) {}", AllowSimpleBracedStatements);
verifyFormat("if CONSTEXPR (true) {}", AllowSimpleBracedStatements);
verifyFormat("while (true) {}", AllowSimpleBracedStatements);
verifyFormat("for (;;) {}", AllowSimpleBracedStatements);
verifyFormat("if (true) { f(); }", AllowSimpleBracedStatements);
verifyFormat("if constexpr (true) { f(); }", AllowSimpleBracedStatements);
verifyFormat("if CONSTEXPR (true) { f(); }", AllowSimpleBracedStatements);
verifyFormat("while (true) { f(); }", AllowSimpleBracedStatements);
verifyFormat("for (;;) { f(); }", AllowSimpleBracedStatements);
verifyFormat("if (true) {\n"
" ffffffffffffffffffffffffffffffffffffffffffffffffffffff();\n"
"}",
AllowSimpleBracedStatements);
verifyFormat("if (true) { //\n"
" f();\n"
"}",
AllowSimpleBracedStatements);
verifyFormat("if (true) {\n"
" f();\n"
" f();\n"
"}",
AllowSimpleBracedStatements);
verifyFormat("if (true) {\n"
" f();\n"
"} else {\n"
" f();\n"
"}",
AllowSimpleBracedStatements);
verifyFormat("struct A2 {\n"
" int X;\n"
"};",
AllowSimpleBracedStatements);
verifyFormat("typedef struct A2 {\n"
" int X;\n"
"} A2_t;",
AllowSimpleBracedStatements);
verifyFormat("template <int> struct A2 {\n"
" struct B {};\n"
"};",
AllowSimpleBracedStatements);
AllowSimpleBracedStatements.AllowShortIfStatementsOnASingleLine =
FormatStyle::SIS_Never;
verifyFormat("if (true) {}", AllowSimpleBracedStatements);
verifyFormat("if (true) {\n"
" f();\n"
"}",
AllowSimpleBracedStatements);
verifyFormat("if (true) {\n"
" f();\n"
"} else {\n"
" f();\n"
"}",
AllowSimpleBracedStatements);
AllowSimpleBracedStatements.AllowShortLoopsOnASingleLine = false;
verifyFormat("while (true) {}", AllowSimpleBracedStatements);
verifyFormat("while (true) {\n"
" f();\n"
"}",
AllowSimpleBracedStatements);
verifyFormat("for (;;) {}", AllowSimpleBracedStatements);
verifyFormat("for (;;) {\n"
" f();\n"
"}",
AllowSimpleBracedStatements);
AllowSimpleBracedStatements.AllowShortIfStatementsOnASingleLine =
FormatStyle::SIS_WithoutElse;
AllowSimpleBracedStatements.AllowShortLoopsOnASingleLine = true;
AllowSimpleBracedStatements.BraceWrapping.AfterControlStatement = true;
verifyFormat("if (true) {}", AllowSimpleBracedStatements);
verifyFormat("if constexpr (true) {}", AllowSimpleBracedStatements);
verifyFormat("if CONSTEXPR (true) {}", AllowSimpleBracedStatements);
verifyFormat("while (true) {}", AllowSimpleBracedStatements);
verifyFormat("for (;;) {}", AllowSimpleBracedStatements);
verifyFormat("if (true) { f(); }", AllowSimpleBracedStatements);
verifyFormat("if constexpr (true) { f(); }", AllowSimpleBracedStatements);
verifyFormat("if CONSTEXPR (true) { f(); }", AllowSimpleBracedStatements);
verifyFormat("while (true) { f(); }", AllowSimpleBracedStatements);
verifyFormat("for (;;) { f(); }", AllowSimpleBracedStatements);
verifyFormat("if (true)\n"
"{\n"
" ffffffffffffffffffffffffffffffffffffffffffffffffffffff();\n"
"}",
AllowSimpleBracedStatements);
verifyFormat("if (true)\n"
"{ //\n"
" f();\n"
"}",
AllowSimpleBracedStatements);
verifyFormat("if (true)\n"
"{\n"
" f();\n"
" f();\n"
"}",
AllowSimpleBracedStatements);
verifyFormat("if (true)\n"
"{\n"
" f();\n"
"} else\n"
"{\n"
" f();\n"
"}",
AllowSimpleBracedStatements);
AllowSimpleBracedStatements.AllowShortIfStatementsOnASingleLine =
FormatStyle::SIS_Never;
verifyFormat("if (true) {}", AllowSimpleBracedStatements);
verifyFormat("if (true)\n"
"{\n"
" f();\n"
"}",
AllowSimpleBracedStatements);
verifyFormat("if (true)\n"
"{\n"
" f();\n"
"} else\n"
"{\n"
" f();\n"
"}",
AllowSimpleBracedStatements);
AllowSimpleBracedStatements.AllowShortLoopsOnASingleLine = false;
verifyFormat("while (true) {}", AllowSimpleBracedStatements);
verifyFormat("while (true)\n"
"{\n"
" f();\n"
"}",
AllowSimpleBracedStatements);
verifyFormat("for (;;) {}", AllowSimpleBracedStatements);
verifyFormat("for (;;)\n"
"{\n"
" f();\n"
"}",
AllowSimpleBracedStatements);
}
TEST_F(FormatTest, ShortBlocksInMacrosDontMergeWithCodeAfterMacro) {
FormatStyle Style = getLLVMStyleWithColumns(60);
Style.AllowShortBlocksOnASingleLine = FormatStyle::SBS_Always;
Style.AllowShortIfStatementsOnASingleLine = FormatStyle::SIS_WithoutElse;
Style.BreakBeforeBraces = FormatStyle::BS_Allman;
EXPECT_EQ("#define A \\\n"
" if (HANDLEwernufrnuLwrmviferuvnierv) \\\n"
" { RET_ERR1_ANUIREUINERUIFNIOAerwfwrvnuier; }\n"
"X;",
format("#define A \\\n"
" if (HANDLEwernufrnuLwrmviferuvnierv) { \\\n"
" RET_ERR1_ANUIREUINERUIFNIOAerwfwrvnuier; \\\n"
" }\n"
"X;",
Style));
}
TEST_F(FormatTest, ParseIfElse) {
verifyFormat("if (true)\n"
" if (true)\n"
" if (true)\n"
" f();\n"
" else\n"
" g();\n"
" else\n"
" h();\n"
"else\n"
" i();");
verifyFormat("if (true)\n"
" if (true)\n"
" if (true) {\n"
" if (true)\n"
" f();\n"
" } else {\n"
" g();\n"
" }\n"
" else\n"
" h();\n"
"else {\n"
" i();\n"
"}");
verifyFormat("if (true)\n"
" if constexpr (true)\n"
" if (true) {\n"
" if constexpr (true)\n"
" f();\n"
" } else {\n"
" g();\n"
" }\n"
" else\n"
" h();\n"
"else {\n"
" i();\n"
"}");
verifyFormat("if (true)\n"
" if CONSTEXPR (true)\n"
" if (true) {\n"
" if CONSTEXPR (true)\n"
" f();\n"
" } else {\n"
" g();\n"
" }\n"
" else\n"
" h();\n"
"else {\n"
" i();\n"
"}");
verifyFormat("void f() {\n"
" if (a) {\n"
" } else {\n"
" }\n"
"}");
}
TEST_F(FormatTest, ElseIf) {
verifyFormat("if (a) {\n} else if (b) {\n}");
verifyFormat("if (a)\n"
" f();\n"
"else if (b)\n"
" g();\n"
"else\n"
" h();");
verifyFormat("if constexpr (a)\n"
" f();\n"
"else if constexpr (b)\n"
" g();\n"
"else\n"
" h();");
verifyFormat("if CONSTEXPR (a)\n"
" f();\n"
"else if CONSTEXPR (b)\n"
" g();\n"
"else\n"
" h();");
verifyFormat("if (a) {\n"
" f();\n"
"}\n"
"// or else ..\n"
"else {\n"
" g()\n"
"}");
verifyFormat("if (a) {\n"
"} else if (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaaa)) {\n"
"}");
verifyFormat("if (a) {\n"
"} else if constexpr (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaaa)) {\n"
"}");
verifyFormat("if (a) {\n"
"} else if CONSTEXPR (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaaa)) {\n"
"}");
verifyFormat("if (a) {\n"
"} else if (\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {\n"
"}",
getLLVMStyleWithColumns(62));
verifyFormat("if (a) {\n"
"} else if constexpr (\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {\n"
"}",
getLLVMStyleWithColumns(62));
verifyFormat("if (a) {\n"
"} else if CONSTEXPR (\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {\n"
"}",
getLLVMStyleWithColumns(62));
}
TEST_F(FormatTest, FormatsForLoop) {
verifyFormat(
"for (int VeryVeryLongLoopVariable = 0; VeryVeryLongLoopVariable < 10;\n"
" ++VeryVeryLongLoopVariable)\n"
" ;");
verifyFormat("for (;;)\n"
" f();");
verifyFormat("for (;;) {\n}");
verifyFormat("for (;;) {\n"
" f();\n"
"}");
verifyFormat("for (int i = 0; (i < 10); ++i) {\n}");
verifyFormat(
"for (std::vector<UnwrappedLine>::iterator I = UnwrappedLines.begin(),\n"
" E = UnwrappedLines.end();\n"
" I != E; ++I) {\n}");
verifyFormat(
"for (MachineFun::iterator IIII = PrevIt, EEEE = F.end(); IIII != EEEE;\n"
" ++IIIII) {\n}");
verifyFormat("for (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaa =\n"
" aaaaaaaaaaaaaaaa.aaaaaaaaaaaaaaa;\n"
" aaaaaaaaaaa != aaaaaaaaaaaaaaaaaaa; ++aaaaaaaaaaa) {\n}");
verifyFormat("for (llvm::ArrayRef<NamedDecl *>::iterator\n"
" I = FD->getDeclsInPrototypeScope().begin(),\n"
" E = FD->getDeclsInPrototypeScope().end();\n"
" I != E; ++I) {\n}");
verifyFormat("for (SmallVectorImpl<TemplateIdAnnotationn *>::iterator\n"
" I = Container.begin(),\n"
" E = Container.end();\n"
" I != E; ++I) {\n}",
getLLVMStyleWithColumns(76));
verifyFormat(
"for (aaaaaaaaaaaaaaaaa aaaaaaaaaaa = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa !=\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);\n"
" ++aaaaaaaaaaa) {\n}");
verifyFormat("for (int i = 0; i < aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ||\n"
" bbbbbbbbbbbbbbbbbbbb < ccccccccccccccc;\n"
" ++i) {\n}");
verifyFormat("for (int aaaaaaaaaaa = 1; aaaaaaaaaaa <= bbbbbbbbbbbbbbb;\n"
" aaaaaaaaaaa++, bbbbbbbbbbbbbbbbb++) {\n"
"}");
verifyFormat("for (some_namespace::SomeIterator iter( // force break\n"
" aaaaaaaaaa);\n"
" iter; ++iter) {\n"
"}");
verifyFormat("for (auto aaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaa != bbbbbbbbbbbbbbbbbbbbbbb;\n"
" ++aaaaaaaaaaaaaaaaaaaaaaaaaaa) {");
// These should not be formatted as Objective-C for-in loops.
verifyFormat("for (Foo *x = 0; x != in; x++) {\n}");
verifyFormat("Foo *x;\nfor (x = 0; x != in; x++) {\n}");
verifyFormat("Foo *x;\nfor (x in y) {\n}");
verifyFormat("for (const Foo<Bar> &baz = in.value(); !baz.at_end(); ++baz) {\n}");
FormatStyle NoBinPacking = getLLVMStyle();
NoBinPacking.BinPackParameters = false;
verifyFormat("for (int aaaaaaaaaaa = 1;\n"
" aaaaaaaaaaa <= aaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaa,\n"
" aaaaaaaaaaaaaaaa,\n"
" aaaaaaaaaaaaaaaa,\n"
" aaaaaaaaaaaaaaaa);\n"
" aaaaaaaaaaa++, bbbbbbbbbbbbbbbbb++) {\n"
"}",
NoBinPacking);
verifyFormat(
"for (std::vector<UnwrappedLine>::iterator I = UnwrappedLines.begin(),\n"
" E = UnwrappedLines.end();\n"
" I != E;\n"
" ++I) {\n}",
NoBinPacking);
FormatStyle AlignLeft = getLLVMStyle();
AlignLeft.PointerAlignment = FormatStyle::PAS_Left;
verifyFormat("for (A* a = start; a < end; ++a, ++value) {\n}", AlignLeft);
}
TEST_F(FormatTest, RangeBasedForLoops) {
verifyFormat("for (auto aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa :\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {\n}");
verifyFormat("for (auto aaaaaaaaaaaaaaaaaaaaa :\n"
" aaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaa, aaaaaaaaaaaaa)) {\n}");
verifyFormat("for (const aaaaaaaaaaaaaaaaaaaaa &aaaaaaaaa :\n"
" aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {\n}");
verifyFormat("for (aaaaaaaaa aaaaaaaaaaaaaaaaaaaaa :\n"
" aaaaaaaaaaaa.aaaaaaaaaaaa().aaaaaaaaa().a()) {\n}");
}
TEST_F(FormatTest, ForEachLoops) {
verifyFormat("void f() {\n"
" foreach (Item *item, itemlist) {}\n"
" Q_FOREACH (Item *item, itemlist) {}\n"
" BOOST_FOREACH (Item *item, itemlist) {}\n"
" UNKNOWN_FORACH(Item * item, itemlist) {}\n"
"}");
// As function-like macros.
verifyFormat("#define foreach(x, y)\n"
"#define Q_FOREACH(x, y)\n"
"#define BOOST_FOREACH(x, y)\n"
"#define UNKNOWN_FOREACH(x, y)\n");
// Not as function-like macros.
verifyFormat("#define foreach (x, y)\n"
"#define Q_FOREACH (x, y)\n"
"#define BOOST_FOREACH (x, y)\n"
"#define UNKNOWN_FOREACH (x, y)\n");
}
TEST_F(FormatTest, FormatsWhileLoop) {
verifyFormat("while (true) {\n}");
verifyFormat("while (true)\n"
" f();");
verifyFormat("while () {\n}");
verifyFormat("while () {\n"
" f();\n"
"}");
}
TEST_F(FormatTest, FormatsDoWhile) {
verifyFormat("do {\n"
" do_something();\n"
"} while (something());");
verifyFormat("do\n"
" do_something();\n"
"while (something());");
}
TEST_F(FormatTest, FormatsSwitchStatement) {
verifyFormat("switch (x) {\n"
"case 1:\n"
" f();\n"
" break;\n"
"case kFoo:\n"
"case ns::kBar:\n"
"case kBaz:\n"
" break;\n"
"default:\n"
" g();\n"
" break;\n"
"}");
verifyFormat("switch (x) {\n"
"case 1: {\n"
" f();\n"
" break;\n"
"}\n"
"case 2: {\n"
" break;\n"