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a5137ef9a9
llvm::join_items is similar to llvm::join, which produces a string by concatenating a sequence of values together separated by a given separator. But it differs in that the arguments to llvm::join() are same-type members of a container, whereas the arguments to llvm::join_items are arbitrary types passed into a variadic template. The only requirement on parameters to llvm::join_items (including for the separator themselves) is that they be implicitly convertible to std::string or have an overload of std::string::operator+ Differential Revision: https://reviews.llvm.org/D24880 llvm-svn: 282502
53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
//===- StringExtrasTest.cpp - Unit tests for String extras ----------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/StringExtras.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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TEST(StringExtrasTest, Join) {
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std::vector<std::string> Items;
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EXPECT_EQ("", join(Items.begin(), Items.end(), " <sep> "));
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Items = {"foo"};
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EXPECT_EQ("foo", join(Items.begin(), Items.end(), " <sep> "));
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Items = {"foo", "bar"};
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EXPECT_EQ("foo <sep> bar", join(Items.begin(), Items.end(), " <sep> "));
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Items = {"foo", "bar", "baz"};
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EXPECT_EQ("foo <sep> bar <sep> baz",
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join(Items.begin(), Items.end(), " <sep> "));
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}
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TEST(StringExtrasTest, JoinItems) {
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const char *Foo = "foo";
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std::string Bar = "bar";
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llvm::StringRef Baz = "baz";
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char X = 'x';
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EXPECT_EQ("", join_items(" <sep> "));
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EXPECT_EQ("", join_items('/'));
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EXPECT_EQ("foo", join_items(" <sep> ", Foo));
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EXPECT_EQ("foo", join_items('/', Foo));
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EXPECT_EQ("foo <sep> bar", join_items(" <sep> ", Foo, Bar));
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EXPECT_EQ("foo/bar", join_items('/', Foo, Bar));
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EXPECT_EQ("foo <sep> bar <sep> baz", join_items(" <sep> ", Foo, Bar, Baz));
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EXPECT_EQ("foo/bar/baz", join_items('/', Foo, Bar, Baz));
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EXPECT_EQ("foo <sep> bar <sep> baz <sep> x",
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join_items(" <sep> ", Foo, Bar, Baz, X));
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EXPECT_EQ("foo/bar/baz/x", join_items('/', Foo, Bar, Baz, X));
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}
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