/usr/include/llvm-6.0/llvm/ADT/StringSwitch.h is in llvm-6.0-dev 1:6.0-1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 | //===--- StringSwitch.h - Switch-on-literal-string Construct --------------===/
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//===----------------------------------------------------------------------===/
//
// This file implements the StringSwitch template, which mimics a switch()
// statement whose cases are string literals.
//
//===----------------------------------------------------------------------===/
#ifndef LLVM_ADT_STRINGSWITCH_H
#define LLVM_ADT_STRINGSWITCH_H
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Compiler.h"
#include <cassert>
#include <cstring>
namespace llvm {
/// \brief A switch()-like statement whose cases are string literals.
///
/// The StringSwitch class is a simple form of a switch() statement that
/// determines whether the given string matches one of the given string
/// literals. The template type parameter \p T is the type of the value that
/// will be returned from the string-switch expression. For example,
/// the following code switches on the name of a color in \c argv[i]:
///
/// \code
/// Color color = StringSwitch<Color>(argv[i])
/// .Case("red", Red)
/// .Case("orange", Orange)
/// .Case("yellow", Yellow)
/// .Case("green", Green)
/// .Case("blue", Blue)
/// .Case("indigo", Indigo)
/// .Cases("violet", "purple", Violet)
/// .Default(UnknownColor);
/// \endcode
template<typename T, typename R = T>
class StringSwitch {
/// \brief The string we are matching.
StringRef Str;
/// \brief The pointer to the result of this switch statement, once known,
/// null before that.
const T *Result;
public:
LLVM_ATTRIBUTE_ALWAYS_INLINE
explicit StringSwitch(StringRef S)
: Str(S), Result(nullptr) { }
// StringSwitch is not copyable.
StringSwitch(const StringSwitch &) = delete;
void operator=(const StringSwitch &) = delete;
StringSwitch(StringSwitch &&other) {
*this = std::move(other);
}
StringSwitch &operator=(StringSwitch &&other) {
Str = other.Str;
Result = other.Result;
return *this;
}
~StringSwitch() = default;
// Case-sensitive case matchers
template<unsigned N>
LLVM_ATTRIBUTE_ALWAYS_INLINE
StringSwitch& Case(const char (&S)[N], const T& Value) {
assert(N);
if (!Result && N-1 == Str.size() &&
(N == 1 || std::memcmp(S, Str.data(), N-1) == 0)) {
Result = &Value;
}
return *this;
}
template<unsigned N>
LLVM_ATTRIBUTE_ALWAYS_INLINE
StringSwitch& EndsWith(const char (&S)[N], const T &Value) {
assert(N);
if (!Result && Str.size() >= N-1 &&
(N == 1 || std::memcmp(S, Str.data() + Str.size() + 1 - N, N-1) == 0)) {
Result = &Value;
}
return *this;
}
template<unsigned N>
LLVM_ATTRIBUTE_ALWAYS_INLINE
StringSwitch& StartsWith(const char (&S)[N], const T &Value) {
assert(N);
if (!Result && Str.size() >= N-1 &&
(N == 1 || std::memcmp(S, Str.data(), N-1) == 0)) {
Result = &Value;
}
return *this;
}
template<unsigned N0, unsigned N1>
LLVM_ATTRIBUTE_ALWAYS_INLINE
StringSwitch &Cases(const char (&S0)[N0], const char (&S1)[N1],
const T& Value) {
return Case(S0, Value).Case(S1, Value);
}
template<unsigned N0, unsigned N1, unsigned N2>
LLVM_ATTRIBUTE_ALWAYS_INLINE
StringSwitch &Cases(const char (&S0)[N0], const char (&S1)[N1],
const char (&S2)[N2], const T& Value) {
return Case(S0, Value).Cases(S1, S2, Value);
}
template<unsigned N0, unsigned N1, unsigned N2, unsigned N3>
LLVM_ATTRIBUTE_ALWAYS_INLINE
StringSwitch &Cases(const char (&S0)[N0], const char (&S1)[N1],
const char (&S2)[N2], const char (&S3)[N3],
const T& Value) {
return Case(S0, Value).Cases(S1, S2, S3, Value);
}
template<unsigned N0, unsigned N1, unsigned N2, unsigned N3, unsigned N4>
LLVM_ATTRIBUTE_ALWAYS_INLINE
StringSwitch &Cases(const char (&S0)[N0], const char (&S1)[N1],
const char (&S2)[N2], const char (&S3)[N3],
const char (&S4)[N4], const T& Value) {
return Case(S0, Value).Cases(S1, S2, S3, S4, Value);
}
template <unsigned N0, unsigned N1, unsigned N2, unsigned N3, unsigned N4,
unsigned N5>
LLVM_ATTRIBUTE_ALWAYS_INLINE
StringSwitch &Cases(const char (&S0)[N0], const char (&S1)[N1],
const char (&S2)[N2], const char (&S3)[N3],
const char (&S4)[N4], const char (&S5)[N5],
const T &Value) {
return Case(S0, Value).Cases(S1, S2, S3, S4, S5, Value);
}
template <unsigned N0, unsigned N1, unsigned N2, unsigned N3, unsigned N4,
unsigned N5, unsigned N6>
LLVM_ATTRIBUTE_ALWAYS_INLINE
StringSwitch &Cases(const char (&S0)[N0], const char (&S1)[N1],
const char (&S2)[N2], const char (&S3)[N3],
const char (&S4)[N4], const char (&S5)[N5],
const char (&S6)[N6], const T &Value) {
return Case(S0, Value).Cases(S1, S2, S3, S4, S5, S6, Value);
}
template <unsigned N0, unsigned N1, unsigned N2, unsigned N3, unsigned N4,
unsigned N5, unsigned N6, unsigned N7>
LLVM_ATTRIBUTE_ALWAYS_INLINE
StringSwitch &Cases(const char (&S0)[N0], const char (&S1)[N1],
const char (&S2)[N2], const char (&S3)[N3],
const char (&S4)[N4], const char (&S5)[N5],
const char (&S6)[N6], const char (&S7)[N7],
const T &Value) {
return Case(S0, Value).Cases(S1, S2, S3, S4, S5, S6, S7, Value);
}
template <unsigned N0, unsigned N1, unsigned N2, unsigned N3, unsigned N4,
unsigned N5, unsigned N6, unsigned N7, unsigned N8>
LLVM_ATTRIBUTE_ALWAYS_INLINE
StringSwitch &Cases(const char (&S0)[N0], const char (&S1)[N1],
const char (&S2)[N2], const char (&S3)[N3],
const char (&S4)[N4], const char (&S5)[N5],
const char (&S6)[N6], const char (&S7)[N7],
const char (&S8)[N8], const T &Value) {
return Case(S0, Value).Cases(S1, S2, S3, S4, S5, S6, S7, S8, Value);
}
template <unsigned N0, unsigned N1, unsigned N2, unsigned N3, unsigned N4,
unsigned N5, unsigned N6, unsigned N7, unsigned N8, unsigned N9>
LLVM_ATTRIBUTE_ALWAYS_INLINE
StringSwitch &Cases(const char (&S0)[N0], const char (&S1)[N1],
const char (&S2)[N2], const char (&S3)[N3],
const char (&S4)[N4], const char (&S5)[N5],
const char (&S6)[N6], const char (&S7)[N7],
const char (&S8)[N8], const char (&S9)[N9],
const T &Value) {
return Case(S0, Value).Cases(S1, S2, S3, S4, S5, S6, S7, S8, S9, Value);
}
// Case-insensitive case matchers.
template <unsigned N>
LLVM_ATTRIBUTE_ALWAYS_INLINE StringSwitch &CaseLower(const char (&S)[N],
const T &Value) {
if (!Result && Str.equals_lower(StringRef(S, N - 1)))
Result = &Value;
return *this;
}
template <unsigned N>
LLVM_ATTRIBUTE_ALWAYS_INLINE StringSwitch &EndsWithLower(const char (&S)[N],
const T &Value) {
if (!Result && Str.endswith_lower(StringRef(S, N - 1)))
Result = &Value;
return *this;
}
template <unsigned N>
LLVM_ATTRIBUTE_ALWAYS_INLINE StringSwitch &StartsWithLower(const char (&S)[N],
const T &Value) {
if (!Result && Str.startswith_lower(StringRef(S, N - 1)))
Result = &Value;
return *this;
}
template <unsigned N0, unsigned N1>
LLVM_ATTRIBUTE_ALWAYS_INLINE StringSwitch &
CasesLower(const char (&S0)[N0], const char (&S1)[N1], const T &Value) {
return CaseLower(S0, Value).CaseLower(S1, Value);
}
template <unsigned N0, unsigned N1, unsigned N2>
LLVM_ATTRIBUTE_ALWAYS_INLINE StringSwitch &
CasesLower(const char (&S0)[N0], const char (&S1)[N1], const char (&S2)[N2],
const T &Value) {
return CaseLower(S0, Value).CasesLower(S1, S2, Value);
}
template <unsigned N0, unsigned N1, unsigned N2, unsigned N3>
LLVM_ATTRIBUTE_ALWAYS_INLINE StringSwitch &
CasesLower(const char (&S0)[N0], const char (&S1)[N1], const char (&S2)[N2],
const char (&S3)[N3], const T &Value) {
return CaseLower(S0, Value).CasesLower(S1, S2, S3, Value);
}
template <unsigned N0, unsigned N1, unsigned N2, unsigned N3, unsigned N4>
LLVM_ATTRIBUTE_ALWAYS_INLINE StringSwitch &
CasesLower(const char (&S0)[N0], const char (&S1)[N1], const char (&S2)[N2],
const char (&S3)[N3], const char (&S4)[N4], const T &Value) {
return CaseLower(S0, Value).CasesLower(S1, S2, S3, S4, Value);
}
LLVM_ATTRIBUTE_ALWAYS_INLINE
R Default(const T &Value) const {
if (Result)
return *Result;
return Value;
}
LLVM_ATTRIBUTE_ALWAYS_INLINE
operator R() const {
assert(Result && "Fell off the end of a string-switch");
return *Result;
}
};
} // end namespace llvm
#endif // LLVM_ADT_STRINGSWITCH_H
|