14#ifndef LLVM_CLANG_LEX_LITERALSUPPORT_H
15#define LLVM_CLANG_LEX_LITERALSUPPORT_H
20#include "llvm/ADT/APFloat.h"
21#include "llvm/ADT/ArrayRef.h"
22#include "llvm/ADT/SmallString.h"
23#include "llvm/ADT/StringRef.h"
24#include "llvm/Support/DataTypes.h"
28class DiagnosticsEngine;
37void expandUCNs(SmallVectorImpl<char> &Buf, StringRef Input);
56 const char *
const ThisTokBegin;
57 const char *
const ThisTokEnd;
58 const char *DigitsBegin, *SuffixBegin;
63 bool saw_exponent, saw_period, saw_ud_suffix, saw_fixed_point_suffix;
88 return (saw_period || saw_exponent) && saw_fixed_point_suffix;
102 assert(saw_ud_suffix);
106 assert(saw_ud_suffix);
107 return SuffixBegin - ThisTokBegin;
136 assert(!
hadError &&
"cannot reliably get the literal digits with an error");
137 return StringRef(DigitsBegin, SuffixBegin - DigitsBegin);
145 static bool isDigitSeparator(
char C) {
return C ==
'\''; }
149 bool containsDigits(
const char *Start,
const char *End) {
150 return Start != End && (Start + 1 != End || !isDigitSeparator(Start[0]));
153 enum CheckSeparatorKind { CSK_BeforeDigits, CSK_AfterDigits };
156 void checkSeparator(SourceLocation TokLoc,
const char *Pos,
157 CheckSeparatorKind IsAfterDigits);
161 const char *SkipHexDigits(
const char *ptr) {
162 while (ptr != ThisTokEnd && (
isHexDigit(*ptr) || isDigitSeparator(*ptr)))
169 const char *SkipOctalDigits(
const char *ptr) {
170 while (ptr != ThisTokEnd &&
171 ((*ptr >=
'0' && *ptr <=
'7') || isDigitSeparator(*ptr)))
178 const char *SkipDigits(
const char *ptr) {
179 while (ptr != ThisTokEnd && (
isDigit(*ptr) || isDigitSeparator(*ptr)))
186 const char *SkipBinaryDigits(
const char *ptr) {
187 while (ptr != ThisTokEnd &&
188 (*ptr ==
'0' || *ptr ==
'1' || isDigitSeparator(*ptr)))
203 unsigned UDSuffixOffset;
210 bool isOrdinary()
const {
return Kind == tok::char_constant; }
211 bool isWide()
const {
return Kind == tok::wide_char_constant; }
212 bool isUTF8()
const {
return Kind == tok::utf8_char_constant; }
213 bool isUTF16()
const {
return Kind == tok::utf16_char_constant; }
214 bool isUTF32()
const {
return Kind == tok::utf32_char_constant; }
219 assert(!UDSuffixBuf.empty() &&
"no ud-suffix");
220 return UDSuffixOffset;
238 unsigned MaxTokenLength;
240 unsigned CharByteWidth;
245 unsigned UDSuffixToken;
246 unsigned UDSuffixOffset;
256 :
SM(sm), Features(features),
Target(target), Diags(diags),
257 MaxTokenLength(0), SizeBound(0), CharByteWidth(0), Kind(tok::unknown),
258 ResultPtr(ResultBuf.data()),
283 bool isOrdinary()
const {
return Kind == tok::string_literal; }
284 bool isWide()
const {
return Kind == tok::wide_string_literal; }
285 bool isUTF8()
const {
return Kind == tok::utf8_string_literal; }
286 bool isUTF16()
const {
return Kind == tok::utf16_string_literal; }
287 bool isUTF32()
const {
return Kind == tok::utf32_string_literal; }
297 assert(!UDSuffixBuf.empty() &&
"no ud-suffix");
298 return UDSuffixToken;
302 assert(!UDSuffixBuf.empty() &&
"no ud-suffix");
303 return UDSuffixOffset;
310 bool CopyStringFragment(
const Token &Tok,
const char *TokBegin,
Forward-declares and imports various common LLVM datatypes that clang wants to use unqualified.
Defines the clang::TokenKind enum and support functions.
CharLiteralParser - Perform interpretation and semantic analysis of a character literal.
unsigned getUDSuffixOffset() const
StringRef getUDSuffix() const
uint64_t getValue() const
Concrete class used by the front-end to report problems and issues.
Keeps track of the various options that can be enabled, which controls the dialect of C or C++ that i...
NumericLiteralParser - This performs strict semantic analysis of the content of a ppnumber,...
StringRef getUDSuffix() const
bool isFixedPointLiteral() const
bool isFloatingLiteral() const
unsigned getRadix() const
bool isIntegerLiteral() const
llvm::APFloat::opStatus GetFloatValue(llvm::APFloat &Result)
GetFloatValue - Convert this numeric literal to a floating value, using the specified APFloat fltSema...
static bool isValidUDSuffix(const LangOptions &LangOpts, StringRef Suffix)
Determine whether a suffix is a valid ud-suffix.
bool GetIntegerValue(llvm::APInt &Val)
GetIntegerValue - Convert this numeric literal value to an APInt that matches Val's input width.
unsigned getUDSuffixOffset() const
StringRef getLiteralDigits() const
Get the digits that comprise the literal.
bool GetFixedPointValue(llvm::APInt &StoreVal, unsigned Scale)
GetFixedPointValue - Convert this numeric literal value into a scaled integer that represents this va...
Engages in a tight little dance with the lexer to efficiently preprocess tokens.
Encodes a location in the source.
This class handles loading and caching of source files into memory.
StringLiteralParser - This decodes string escape characters and performs wide string analysis and Tra...
unsigned getUDSuffixToken() const
Get the index of a token containing a ud-suffix.
unsigned getUDSuffixOffset() const
Get the spelling offset of the first byte of the ud-suffix.
unsigned getOffsetOfStringByte(const Token &TheTok, unsigned ByteNo) const
getOffsetOfStringByte - This function returns the offset of the specified byte of the string data rep...
bool isUnevaluated() const
StringRef getUDSuffix() const
unsigned GetStringLength() const
StringLiteralParser(ArrayRef< Token > StringToks, const SourceManager &sm, const LangOptions &features, const TargetInfo &target, DiagnosticsEngine *diags=nullptr)
static bool isValidUDSuffix(const LangOptions &LangOpts, StringRef Suffix)
Determine whether a suffix is a valid ud-suffix.
unsigned GetNumStringChars() const
StringRef GetString() const
Exposes information about the current target.
Token - This structure provides full information about a lexed token.
TokenKind
Provides a simple uniform namespace for tokens from all C languages.
void expandUCNs(SmallVectorImpl< char > &Buf, StringRef Input)
Copy characters from Input to Buf, expanding any UCNs.
bool tokenIsLikeStringLiteral(const Token &Tok, const LangOptions &LO)
Return true if the token is a string literal, or a function local predefined macro,...
@ Result
The result type of a method or function.
LLVM_READONLY bool isDigit(unsigned char c)
Return true if this character is an ASCII digit: [0-9].
bool isFunctionLocalStringLiteralMacro(tok::TokenKind K, const LangOptions &LO)
Return true if the token corresponds to a function local predefined macro, which expands to a string ...
LLVM_READONLY bool isHexDigit(unsigned char c)
Return true if this character is an ASCII hex digit: [0-9a-fA-F].