LLVM 19.0.0git
StringExtras.h
Go to the documentation of this file.
1//===- llvm/ADT/StringExtras.h - Useful string functions --------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8///
9/// \file
10/// This file contains some functions that are useful when dealing with strings.
11///
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_ADT_STRINGEXTRAS_H
15#define LLVM_ADT_STRINGEXTRAS_H
16
17#include "llvm/ADT/APSInt.h"
18#include "llvm/ADT/ArrayRef.h"
20#include "llvm/ADT/StringRef.h"
21#include "llvm/ADT/Twine.h"
22#include <cassert>
23#include <cstddef>
24#include <cstdint>
25#include <cstdlib>
26#include <cstring>
27#include <iterator>
28#include <string>
29#include <utility>
30
31namespace llvm {
32
33class raw_ostream;
34
35/// hexdigit - Return the hexadecimal character for the
36/// given number \p X (which should be less than 16).
37inline char hexdigit(unsigned X, bool LowerCase = false) {
38 assert(X < 16);
39 static const char LUT[] = "0123456789ABCDEF";
40 const uint8_t Offset = LowerCase ? 32 : 0;
41 return LUT[X] | Offset;
42}
43
44/// Given an array of c-style strings terminated by a null pointer, construct
45/// a vector of StringRefs representing the same strings without the terminating
46/// null string.
47inline std::vector<StringRef> toStringRefArray(const char *const *Strings) {
48 std::vector<StringRef> Result;
49 while (*Strings)
50 Result.push_back(*Strings++);
51 return Result;
52}
53
54/// Construct a string ref from a boolean.
55inline StringRef toStringRef(bool B) { return StringRef(B ? "true" : "false"); }
56
57/// Construct a string ref from an array ref of unsigned chars.
58inline StringRef toStringRef(ArrayRef<uint8_t> Input) {
59 return StringRef(reinterpret_cast<const char *>(Input.begin()), Input.size());
60}
61inline StringRef toStringRef(ArrayRef<char> Input) {
62 return StringRef(Input.begin(), Input.size());
63}
64
65/// Construct a string ref from an array ref of unsigned chars.
66template <class CharT = uint8_t>
67inline ArrayRef<CharT> arrayRefFromStringRef(StringRef Input) {
68 static_assert(std::is_same<CharT, char>::value ||
69 std::is_same<CharT, unsigned char>::value ||
70 std::is_same<CharT, signed char>::value,
71 "Expected byte type");
72 return ArrayRef<CharT>(reinterpret_cast<const CharT *>(Input.data()),
73 Input.size());
74}
75
76/// Interpret the given character \p C as a hexadecimal digit and return its
77/// value.
78///
79/// If \p C is not a valid hex digit, -1U is returned.
80inline unsigned hexDigitValue(char C) {
81 /* clang-format off */
82 static const int16_t LUT[256] = {
83 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
84 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
85 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
86 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1, // '0'..'9'
87 -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 'A'..'F'
88 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
89 -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 'a'..'f'
90 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
91 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
92 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
93 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
94 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
95 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
96 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
97 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
98 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
99 };
100 /* clang-format on */
101 return LUT[static_cast<unsigned char>(C)];
102}
103
104/// Checks if character \p C is one of the 10 decimal digits.
105inline bool isDigit(char C) { return C >= '0' && C <= '9'; }
106
107/// Checks if character \p C is a hexadecimal numeric character.
108inline bool isHexDigit(char C) { return hexDigitValue(C) != ~0U; }
109
110/// Checks if character \p C is a lowercase letter as classified by "C" locale.
111inline bool isLower(char C) { return 'a' <= C && C <= 'z'; }
112
113/// Checks if character \p C is a uppercase letter as classified by "C" locale.
114inline bool isUpper(char C) { return 'A' <= C && C <= 'Z'; }
115
116/// Checks if character \p C is a valid letter as classified by "C" locale.
117inline bool isAlpha(char C) { return isLower(C) || isUpper(C); }
118
119/// Checks whether character \p C is either a decimal digit or an uppercase or
120/// lowercase letter as classified by "C" locale.
121inline bool isAlnum(char C) { return isAlpha(C) || isDigit(C); }
122
123/// Checks whether character \p C is valid ASCII (high bit is zero).
124inline bool isASCII(char C) { return static_cast<unsigned char>(C) <= 127; }
125
126/// Checks whether all characters in S are ASCII.
127inline bool isASCII(llvm::StringRef S) {
128 for (char C : S)
129 if (LLVM_UNLIKELY(!isASCII(C)))
130 return false;
131 return true;
132}
133
134/// Checks whether character \p C is printable.
135///
136/// Locale-independent version of the C standard library isprint whose results
137/// may differ on different platforms.
138inline bool isPrint(char C) {
139 unsigned char UC = static_cast<unsigned char>(C);
140 return (0x20 <= UC) && (UC <= 0x7E);
141}
142
143/// Checks whether character \p C is whitespace in the "C" locale.
144///
145/// Locale-independent version of the C standard library isspace.
146inline bool isSpace(char C) {
147 return C == ' ' || C == '\f' || C == '\n' || C == '\r' || C == '\t' ||
148 C == '\v';
149}
150
151/// Returns the corresponding lowercase character if \p x is uppercase.
152inline char toLower(char x) {
153 if (isUpper(x))
154 return x - 'A' + 'a';
155 return x;
156}
157
158/// Returns the corresponding uppercase character if \p x is lowercase.
159inline char toUpper(char x) {
160 if (isLower(x))
161 return x - 'a' + 'A';
162 return x;
163}
164
165inline std::string utohexstr(uint64_t X, bool LowerCase = false,
166 unsigned Width = 0) {
167 char Buffer[17];
168 char *BufPtr = std::end(Buffer);
169
170 if (X == 0) *--BufPtr = '0';
171
172 for (unsigned i = 0; Width ? (i < Width) : X; ++i) {
173 unsigned char Mod = static_cast<unsigned char>(X) & 15;
174 *--BufPtr = hexdigit(Mod, LowerCase);
175 X >>= 4;
176 }
177
178 return std::string(BufPtr, std::end(Buffer));
179}
180
181/// Convert buffer \p Input to its hexadecimal representation.
182/// The returned string is double the size of \p Input.
183inline void toHex(ArrayRef<uint8_t> Input, bool LowerCase,
184 SmallVectorImpl<char> &Output) {
185 const size_t Length = Input.size();
186 Output.resize_for_overwrite(Length * 2);
187
188 for (size_t i = 0; i < Length; i++) {
189 const uint8_t c = Input[i];
190 Output[i * 2 ] = hexdigit(c >> 4, LowerCase);
191 Output[i * 2 + 1] = hexdigit(c & 15, LowerCase);
192 }
193}
194
195inline std::string toHex(ArrayRef<uint8_t> Input, bool LowerCase = false) {
196 SmallString<16> Output;
197 toHex(Input, LowerCase, Output);
198 return std::string(Output);
199}
200
201inline std::string toHex(StringRef Input, bool LowerCase = false) {
202 return toHex(arrayRefFromStringRef(Input), LowerCase);
203}
204
205/// Store the binary representation of the two provided values, \p MSB and
206/// \p LSB, that make up the nibbles of a hexadecimal digit. If \p MSB or \p LSB
207/// do not correspond to proper nibbles of a hexadecimal digit, this method
208/// returns false. Otherwise, returns true.
209inline bool tryGetHexFromNibbles(char MSB, char LSB, uint8_t &Hex) {
210 unsigned U1 = hexDigitValue(MSB);
211 unsigned U2 = hexDigitValue(LSB);
212 if (U1 == ~0U || U2 == ~0U)
213 return false;
214
215 Hex = static_cast<uint8_t>((U1 << 4) | U2);
216 return true;
217}
218
219/// Return the binary representation of the two provided values, \p MSB and
220/// \p LSB, that make up the nibbles of a hexadecimal digit.
221inline uint8_t hexFromNibbles(char MSB, char LSB) {
222 uint8_t Hex = 0;
223 bool GotHex = tryGetHexFromNibbles(MSB, LSB, Hex);
224 (void)GotHex;
225 assert(GotHex && "MSB and/or LSB do not correspond to hex digits");
226 return Hex;
227}
228
229/// Convert hexadecimal string \p Input to its binary representation and store
230/// the result in \p Output. Returns true if the binary representation could be
231/// converted from the hexadecimal string. Returns false if \p Input contains
232/// non-hexadecimal digits. The output string is half the size of \p Input.
233inline bool tryGetFromHex(StringRef Input, std::string &Output) {
234 if (Input.empty())
235 return true;
236
237 // If the input string is not properly aligned on 2 nibbles we pad out the
238 // front with a 0 prefix; e.g. `ABC` -> `0ABC`.
239 Output.resize((Input.size() + 1) / 2);
240 char *OutputPtr = const_cast<char *>(Output.data());
241 if (Input.size() % 2 == 1) {
242 uint8_t Hex = 0;
243 if (!tryGetHexFromNibbles('0', Input.front(), Hex))
244 return false;
245 *OutputPtr++ = Hex;
246 Input = Input.drop_front();
247 }
248
249 // Convert the nibble pairs (e.g. `9C`) into bytes (0x9C).
250 // With the padding above we know the input is aligned and the output expects
251 // exactly half as many bytes as nibbles in the input.
252 size_t InputSize = Input.size();
253 assert(InputSize % 2 == 0);
254 const char *InputPtr = Input.data();
255 for (size_t OutputIndex = 0; OutputIndex < InputSize / 2; ++OutputIndex) {
256 uint8_t Hex = 0;
257 if (!tryGetHexFromNibbles(InputPtr[OutputIndex * 2 + 0], // MSB
258 InputPtr[OutputIndex * 2 + 1], // LSB
259 Hex))
260 return false;
261 OutputPtr[OutputIndex] = Hex;
262 }
263 return true;
264}
265
266/// Convert hexadecimal string \p Input to its binary representation.
267/// The return string is half the size of \p Input.
268inline std::string fromHex(StringRef Input) {
269 std::string Hex;
270 bool GotHex = tryGetFromHex(Input, Hex);
271 (void)GotHex;
272 assert(GotHex && "Input contains non hex digits");
273 return Hex;
274}
275
276/// Convert the string \p S to an integer of the specified type using
277/// the radix \p Base. If \p Base is 0, auto-detects the radix.
278/// Returns true if the number was successfully converted, false otherwise.
279template <typename N> bool to_integer(StringRef S, N &Num, unsigned Base = 0) {
280 return !S.getAsInteger(Base, Num);
281}
282
283namespace detail {
284template <typename N>
285inline bool to_float(const Twine &T, N &Num, N (*StrTo)(const char *, char **)) {
286 SmallString<32> Storage;
287 StringRef S = T.toNullTerminatedStringRef(Storage);
288 char *End;
289 N Temp = StrTo(S.data(), &End);
290 if (*End != '\0')
291 return false;
292 Num = Temp;
293 return true;
294}
295}
296
297inline bool to_float(const Twine &T, float &Num) {
298 return detail::to_float(T, Num, strtof);
299}
300
301inline bool to_float(const Twine &T, double &Num) {
302 return detail::to_float(T, Num, strtod);
303}
304
305inline bool to_float(const Twine &T, long double &Num) {
306 return detail::to_float(T, Num, strtold);
307}
308
309inline std::string utostr(uint64_t X, bool isNeg = false) {
310 char Buffer[21];
311 char *BufPtr = std::end(Buffer);
312
313 if (X == 0) *--BufPtr = '0'; // Handle special case...
314
315 while (X) {
316 *--BufPtr = '0' + char(X % 10);
317 X /= 10;
318 }
319
320 if (isNeg) *--BufPtr = '-'; // Add negative sign...
321 return std::string(BufPtr, std::end(Buffer));
322}
323
324inline std::string itostr(int64_t X) {
325 if (X < 0)
326 return utostr(static_cast<uint64_t>(1) + ~static_cast<uint64_t>(X), true);
327 else
328 return utostr(static_cast<uint64_t>(X));
329}
330
331inline std::string toString(const APInt &I, unsigned Radix, bool Signed,
332 bool formatAsCLiteral = false,
333 bool UpperCase = true,
334 bool InsertSeparators = false) {
335 SmallString<40> S;
336 I.toString(S, Radix, Signed, formatAsCLiteral, UpperCase, InsertSeparators);
337 return std::string(S);
338}
339
340inline std::string toString(const APSInt &I, unsigned Radix) {
341 return toString(I, Radix, I.isSigned());
342}
343
344/// StrInStrNoCase - Portable version of strcasestr. Locates the first
345/// occurrence of string 's1' in string 's2', ignoring case. Returns
346/// the offset of s2 in s1 or npos if s2 cannot be found.
347StringRef::size_type StrInStrNoCase(StringRef s1, StringRef s2);
348
349/// getToken - This function extracts one token from source, ignoring any
350/// leading characters that appear in the Delimiters string, and ending the
351/// token at any of the characters that appear in the Delimiters string. If
352/// there are no tokens in the source string, an empty string is returned.
353/// The function returns a pair containing the extracted token and the
354/// remaining tail string.
355std::pair<StringRef, StringRef> getToken(StringRef Source,
356 StringRef Delimiters = " \t\n\v\f\r");
357
358/// SplitString - Split up the specified string according to the specified
359/// delimiters, appending the result fragments to the output list.
360void SplitString(StringRef Source,
361 SmallVectorImpl<StringRef> &OutFragments,
362 StringRef Delimiters = " \t\n\v\f\r");
363
364/// Returns the English suffix for an ordinal integer (-st, -nd, -rd, -th).
365inline StringRef getOrdinalSuffix(unsigned Val) {
366 // It is critically important that we do this perfectly for
367 // user-written sequences with over 100 elements.
368 switch (Val % 100) {
369 case 11:
370 case 12:
371 case 13:
372 return "th";
373 default:
374 switch (Val % 10) {
375 case 1: return "st";
376 case 2: return "nd";
377 case 3: return "rd";
378 default: return "th";
379 }
380 }
381}
382
383/// Print each character of the specified string, escaping it if it is not
384/// printable or if it is an escape char.
385void printEscapedString(StringRef Name, raw_ostream &Out);
386
387/// Print each character of the specified string, escaping HTML special
388/// characters.
389void printHTMLEscaped(StringRef String, raw_ostream &Out);
390
391/// printLowerCase - Print each character as lowercase if it is uppercase.
392void printLowerCase(StringRef String, raw_ostream &Out);
393
394/// Converts a string from camel-case to snake-case by replacing all uppercase
395/// letters with '_' followed by the letter in lowercase, except if the
396/// uppercase letter is the first character of the string.
397std::string convertToSnakeFromCamelCase(StringRef input);
398
399/// Converts a string from snake-case to camel-case by replacing all occurrences
400/// of '_' followed by a lowercase letter with the letter in uppercase.
401/// Optionally allow capitalization of the first letter (if it is a lowercase
402/// letter)
403std::string convertToCamelFromSnakeCase(StringRef input,
404 bool capitalizeFirst = false);
405
406namespace detail {
407
408template <typename IteratorT>
409inline std::string join_impl(IteratorT Begin, IteratorT End,
410 StringRef Separator, std::input_iterator_tag) {
411 std::string S;
412 if (Begin == End)
413 return S;
414
415 S += (*Begin);
416 while (++Begin != End) {
417 S += Separator;
418 S += (*Begin);
419 }
420 return S;
421}
422
423template <typename IteratorT>
424inline std::string join_impl(IteratorT Begin, IteratorT End,
425 StringRef Separator, std::forward_iterator_tag) {
426 std::string S;
427 if (Begin == End)
428 return S;
429
430 size_t Len = (std::distance(Begin, End) - 1) * Separator.size();
431 for (IteratorT I = Begin; I != End; ++I)
432 Len += StringRef(*I).size();
433 S.reserve(Len);
434 size_t PrevCapacity = S.capacity();
435 (void)PrevCapacity;
436 S += (*Begin);
437 while (++Begin != End) {
438 S += Separator;
439 S += (*Begin);
440 }
441 assert(PrevCapacity == S.capacity() && "String grew during building");
442 return S;
443}
444
445template <typename Sep>
446inline void join_items_impl(std::string &Result, Sep Separator) {}
447
448template <typename Sep, typename Arg>
449inline void join_items_impl(std::string &Result, Sep Separator,
450 const Arg &Item) {
451 Result += Item;
452}
453
454template <typename Sep, typename Arg1, typename... Args>
455inline void join_items_impl(std::string &Result, Sep Separator, const Arg1 &A1,
456 Args &&... Items) {
457 Result += A1;
458 Result += Separator;
459 join_items_impl(Result, Separator, std::forward<Args>(Items)...);
460}
461
462inline size_t join_one_item_size(char) { return 1; }
463inline size_t join_one_item_size(const char *S) { return S ? ::strlen(S) : 0; }
464
465template <typename T> inline size_t join_one_item_size(const T &Str) {
466 return Str.size();
467}
468
469template <typename... Args> inline size_t join_items_size(Args &&...Items) {
470 return (0 + ... + join_one_item_size(std::forward<Args>(Items)));
471}
472
473} // end namespace detail
474
475/// Joins the strings in the range [Begin, End), adding Separator between
476/// the elements.
477template <typename IteratorT>
478inline std::string join(IteratorT Begin, IteratorT End, StringRef Separator) {
479 using tag = typename std::iterator_traits<IteratorT>::iterator_category;
480 return detail::join_impl(Begin, End, Separator, tag());
481}
482
483/// Joins the strings in the range [R.begin(), R.end()), adding Separator
484/// between the elements.
485template <typename Range>
486inline std::string join(Range &&R, StringRef Separator) {
487 return join(R.begin(), R.end(), Separator);
488}
489
490/// Joins the strings in the parameter pack \p Items, adding \p Separator
491/// between the elements. All arguments must be implicitly convertible to
492/// std::string, or there should be an overload of std::string::operator+=()
493/// that accepts the argument explicitly.
494template <typename Sep, typename... Args>
495inline std::string join_items(Sep Separator, Args &&... Items) {
496 std::string Result;
497 if (sizeof...(Items) == 0)
498 return Result;
499
500 size_t NS = detail::join_one_item_size(Separator);
501 size_t NI = detail::join_items_size(std::forward<Args>(Items)...);
502 Result.reserve(NI + (sizeof...(Items) - 1) * NS + 1);
503 detail::join_items_impl(Result, Separator, std::forward<Args>(Items)...);
504 return Result;
505}
506
507/// A helper class to return the specified delimiter string after the first
508/// invocation of operator StringRef(). Used to generate a comma-separated
509/// list from a loop like so:
510///
511/// \code
512/// ListSeparator LS;
513/// for (auto &I : C)
514/// OS << LS << I.getName();
515/// \end
516class ListSeparator {
517 bool First = true;
518 StringRef Separator;
519
520public:
521 ListSeparator(StringRef Separator = ", ") : Separator(Separator) {}
522 operator StringRef() {
523 if (First) {
524 First = false;
525 return {};
526 }
527 return Separator;
528 }
529};
530
531/// A forward iterator over partitions of string over a separator.
532class SplittingIterator
533 : public iterator_facade_base<SplittingIterator, std::forward_iterator_tag,
534 StringRef> {
535 char SeparatorStorage;
536 StringRef Current;
537 StringRef Next;
538 StringRef Separator;
539
540public:
541 SplittingIterator(StringRef Str, StringRef Separator)
542 : Next(Str), Separator(Separator) {
543 ++*this;
544 }
545
546 SplittingIterator(StringRef Str, char Separator)
547 : SeparatorStorage(Separator), Next(Str),
548 Separator(&SeparatorStorage, 1) {
549 ++*this;
550 }
551
552 SplittingIterator(const SplittingIterator &R)
553 : SeparatorStorage(R.SeparatorStorage), Current(R.Current), Next(R.Next),
554 Separator(R.Separator) {
555 if (R.Separator.data() == &R.SeparatorStorage)
556 Separator = StringRef(&SeparatorStorage, 1);
557 }
558
559 SplittingIterator &operator=(const SplittingIterator &R) {
560 if (this == &R)
561 return *this;
562
563 SeparatorStorage = R.SeparatorStorage;
564 Current = R.Current;
565 Next = R.Next;
566 Separator = R.Separator;
567 if (R.Separator.data() == &R.SeparatorStorage)
568 Separator = StringRef(&SeparatorStorage, 1);
569 return *this;
570 }
571
572 bool operator==(const SplittingIterator &R) const {
573 assert(Separator == R.Separator);
574 return Current.data() == R.Current.data();
575 }
576
577 const StringRef &operator*() const { return Current; }
578
579 StringRef &operator*() { return Current; }
580
581 SplittingIterator &operator++() {
582 std::tie(Current, Next) = Next.split(Separator);
583 return *this;
584 }
585};
586
587/// Split the specified string over a separator and return a range-compatible
588/// iterable over its partitions. Used to permit conveniently iterating
589/// over separated strings like so:
590///
591/// \code
592/// for (StringRef x : llvm::split("foo,bar,baz", ","))
593/// ...;
594/// \end
595///
596/// Note that the passed string must remain valid throuhgout lifetime
597/// of the iterators.
598inline iterator_range<SplittingIterator> split(StringRef Str, StringRef Separator) {
599 return {SplittingIterator(Str, Separator),
600 SplittingIterator(StringRef(), Separator)};
601}
602
603inline iterator_range<SplittingIterator> split(StringRef Str, char Separator) {
604 return {SplittingIterator(Str, Separator),
605 SplittingIterator(StringRef(), Separator)};
606}
607
608} // end namespace llvm
609
610#endif // LLVM_ADT_STRINGEXTRAS_H
This file implements the APSInt class, which is a simple class that represents an arbitrary sized int...
static GCRegistry::Add< OcamlGC > B("ocaml", "ocaml 3.10-compatible GC")
#define LLVM_UNLIKELY(EXPR)
Definition: Compiler.h:241
static bool isNeg(Value *V)
Returns true if the operation is a negation of V, and it works for both integers and floats.
static Error split(StringRef Str, char Separator, std::pair< StringRef, StringRef > &Split)
Checked version of split, to ensure mandatory subparts.
Definition: DataLayout.cpp:235
std::string Name
bool End
Definition: ELF_riscv.cpp:480
static GCMetadataPrinterRegistry::Add< ErlangGCPrinter > X("erlang", "erlang-compatible garbage collector")
bool operator==(const HTTPRequest &A, const HTTPRequest &B)
Definition: HTTPClient.cpp:29
#define I(x, y, z)
Definition: MD5.cpp:58
static bool isDigit(const char C)
static bool isHexDigit(const char C)
static bool isLower(const char C)
static bool isUpper(const char C)
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
This file defines the SmallString class.
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
size_t size_type
Definition: StringRef.h:56
constexpr char Args[]
Key for Kernel::Metadata::mArgs.
@ C
The default llvm calling convention, compatible with C.
Definition: CallingConv.h:34
std::optional< const char * > toString(const std::optional< DWARFFormValue > &V)
Take an optional DWARFFormValue and try to extract a string value from it.
StringRef toStringRef(const std::optional< DWARFFormValue > &V, StringRef Default={})
Take an optional DWARFFormValue and try to extract a string value from it.
bool isPrint(int c)
Definition: Locale.cpp:13
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
@ Offset
Definition: DWP.cpp:456
@ Length
Definition: DWP.cpp:456
APInt operator*(APInt a, uint64_t RHS)
Definition: APInt.h:2165
@ Mod
The access may modify the value stored in memory.
#define N