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d94bcd2889
The StringView::substr now accepts a substring starting position and its length instead of previous non-standard `from` & `to` positions. All uses of two argument StringView::substr are in MicrosoftDemangler and have 0 as a starting position, so no changes are necessary. This also fixes a bug where attempting to extract a suffix with substr (a `to` position equal to size) would return a substring without the last character. Fixing the issue should not introduce observable changes in the demangler, since as currently used, a second argument to StringView::substr is either: 1) a result of a successful call to StringView::find and so necessarily smaller than size., or 2) in the case of Demangler::demangleCharLiteral potentially equal to size, but with demangler expecting more data to follow later on and failing either way. Reviewed By: #libc_abi, ldionne, erik.pilkington Differential Revision: https://reviews.llvm.org/D100246
49 lines
1.2 KiB
C++
49 lines
1.2 KiB
C++
//===- llvm/unittest/StringViewTest.cpp - StringView unit tests -----------===//
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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/Demangle/StringView.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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using llvm::itanium_demangle::StringView;
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namespace llvm {
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namespace itanium_demangle {
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std::ostream &operator<<(std::ostream &OS, const StringView &S) {
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return OS.write(S.begin(), S.size());
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}
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} // namespace itanium_demangle
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} // namespace llvm
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TEST(StringViewTest, EmptyInitializerList) {
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StringView S = {};
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EXPECT_TRUE(S.empty());
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S = {};
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EXPECT_TRUE(S.empty());
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}
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TEST(StringViewTest, Substr) {
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StringView S("abcdef");
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EXPECT_EQ("abcdef", S.substr(0));
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EXPECT_EQ("f", S.substr(5));
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EXPECT_EQ("", S.substr(6));
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EXPECT_EQ("", S.substr(0, 0));
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EXPECT_EQ("a", S.substr(0, 1));
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EXPECT_EQ("abcde", S.substr(0, 5));
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EXPECT_EQ("abcdef", S.substr(0, 6));
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EXPECT_EQ("abcdef", S.substr(0, 7));
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EXPECT_EQ("f", S.substr(5, 100));
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EXPECT_EQ("", S.substr(6, 100));
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}
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