1 //===- llvm/unittest/Support/RegexTest.cpp - Regex tests --===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "gtest/gtest.h" 11 #include "llvm/Support/Regex.h" 12 #include "llvm/ADT/SmallVector.h" 13 #include <cstring> 14 15 using namespace llvm; 16 namespace { 17 18 class RegexTest : public ::testing::Test { 19 }; 20 21 TEST_F(RegexTest, Basics) { 22 Regex r1("^[0-9]+$"); 23 EXPECT_TRUE(r1.match("916")); 24 EXPECT_TRUE(r1.match("9")); 25 EXPECT_FALSE(r1.match("9a")); 26 27 SmallVector<StringRef, 1> Matches; 28 Regex r2("[0-9]+"); 29 EXPECT_TRUE(r2.match("aa216b", &Matches)); 30 EXPECT_EQ(1u, Matches.size()); 31 EXPECT_EQ("216", Matches[0].str()); 32 33 Regex r3("[0-9]+([a-f])?:([0-9]+)"); 34 EXPECT_TRUE(r3.match("9a:513b", &Matches)); 35 EXPECT_EQ(3u, Matches.size()); 36 EXPECT_EQ("9a:513", Matches[0].str()); 37 EXPECT_EQ("a", Matches[1].str()); 38 EXPECT_EQ("513", Matches[2].str()); 39 40 EXPECT_TRUE(r3.match("9:513b", &Matches)); 41 EXPECT_EQ(3u, Matches.size()); 42 EXPECT_EQ("9:513", Matches[0].str()); 43 EXPECT_EQ("", Matches[1].str()); 44 EXPECT_EQ("513", Matches[2].str()); 45 46 Regex r4("a[^b]+b"); 47 std::string String="axxb"; 48 String[2] = '\0'; 49 EXPECT_FALSE(r4.match("abb")); 50 EXPECT_TRUE(r4.match(String, &Matches)); 51 EXPECT_EQ(1u, Matches.size()); 52 EXPECT_EQ(String, Matches[0].str()); 53 54 55 std::string NulPattern="X[0-9]+X([a-f])?:([0-9]+)"; 56 String="YX99a:513b"; 57 NulPattern[7] = '\0'; 58 Regex r5(NulPattern); 59 EXPECT_FALSE(r5.match(String)); 60 EXPECT_FALSE(r5.match("X9")); 61 String[3]='\0'; 62 EXPECT_TRUE(r5.match(String)); 63 } 64 65 TEST_F(RegexTest, Substitution) { 66 std::string Error; 67 68 EXPECT_EQ("aNUMber", Regex("[0-9]+").sub("NUM", "a1234ber")); 69 70 // Standard Escapes 71 EXPECT_EQ("a\\ber", Regex("[0-9]+").sub("\\\\", "a1234ber", &Error)); 72 EXPECT_EQ(Error, ""); 73 EXPECT_EQ("a\nber", Regex("[0-9]+").sub("\\n", "a1234ber", &Error)); 74 EXPECT_EQ(Error, ""); 75 EXPECT_EQ("a\tber", Regex("[0-9]+").sub("\\t", "a1234ber", &Error)); 76 EXPECT_EQ(Error, ""); 77 EXPECT_EQ("ajber", Regex("[0-9]+").sub("\\j", "a1234ber", &Error)); 78 EXPECT_EQ(Error, ""); 79 80 EXPECT_EQ("aber", Regex("[0-9]+").sub("\\", "a1234ber", &Error)); 81 EXPECT_EQ(Error, "replacement string contained trailing backslash"); 82 83 // Backreferences 84 EXPECT_EQ("aa1234bber", Regex("a[0-9]+b").sub("a\\0b", "a1234ber", &Error)); 85 EXPECT_EQ(Error, ""); 86 87 EXPECT_EQ("a1234ber", Regex("a([0-9]+)b").sub("a\\1b", "a1234ber", &Error)); 88 EXPECT_EQ(Error, ""); 89 90 EXPECT_EQ("aber", Regex("a[0-9]+b").sub("a\\100b", "a1234ber", &Error)); 91 EXPECT_EQ(Error, "invalid backreference string '100'"); 92 } 93 94 } 95
