derek.holloway
7502bf64a4
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57 lines
2.0 KiB
C++
57 lines
2.0 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/Format.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace {
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template <typename FormatTy>
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std::string printToString(unsigned MaxN, FormatTy &&Fmt) {
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std::vector<char> Dst(MaxN + 2);
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int N = Fmt.snprint(Dst.data(), Dst.size());
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Dst.back() = 0;
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return N < 0 ? "" : Dst.data();
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}
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template <typename Expected, typename Arg>
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constexpr bool checkDecayTypeEq(const Arg &arg) {
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return std::is_same_v<detail::decay_if_c_char_array_t<Arg>, Expected>;
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}
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TEST(Format, DecayIfCCharArray) {
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char Array[] = "Array";
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const char ConstArray[] = "ConstArray";
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char PtrBuf[] = "Ptr";
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char *Ptr = PtrBuf;
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const char *PtrToConst = "PtrToConst";
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EXPECT_EQ(" Literal", printToString(20, format("%15s", "Literal")));
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EXPECT_EQ(" Array", printToString(20, format("%15s", Array)));
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EXPECT_EQ(" ConstArray", printToString(20, format("%15s", ConstArray)));
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EXPECT_EQ(" Ptr", printToString(20, format("%15s", Ptr)));
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EXPECT_EQ(" PtrToConst", printToString(20, format("%15s", PtrToConst)));
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EXPECT_TRUE(checkDecayTypeEq<const char *>("Literal"));
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EXPECT_TRUE(checkDecayTypeEq<const char *>(Array));
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EXPECT_TRUE(checkDecayTypeEq<const char *>(ConstArray));
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EXPECT_TRUE(checkDecayTypeEq<char *>(Ptr));
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EXPECT_TRUE(checkDecayTypeEq<const char *>(PtrToConst));
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EXPECT_TRUE(checkDecayTypeEq<char>(PtrToConst[0]));
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EXPECT_TRUE(
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checkDecayTypeEq<const char *>(static_cast<const char *>("Literal")));
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wchar_t WCharArray[] = L"WCharArray";
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EXPECT_TRUE(checkDecayTypeEq<wchar_t[11]>(WCharArray));
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EXPECT_TRUE(checkDecayTypeEq<wchar_t>(WCharArray[0]));
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}
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} // namespace
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