clang  6.0.0svn
Public Member Functions | Static Public Member Functions | Public Attributes | List of all members
clang::NumericLiteralParser Class Reference

NumericLiteralParser - This performs strict semantic analysis of the content of a ppnumber, classifying it as either integer, floating, or erroneous, determines the radix of the value and can convert it to a useful value. More...

#include "clang/Lex/LiteralSupport.h"

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Public Member Functions

 NumericLiteralParser (StringRef TokSpelling, SourceLocation TokLoc, Preprocessor &PP)
 integer-constant: [C99 6.4.4.1] decimal-constant integer-suffix octal-constant integer-suffix hexadecimal-constant integer-suffix binary-literal integer-suffix [GNU, C++1y] user-defined-integer-literal: [C++11 lex.ext] decimal-literal ud-suffix octal-literal ud-suffix hexadecimal-literal ud-suffix binary-literal ud-suffix [GNU, C++1y] decimal-constant: nonzero-digit decimal-constant digit octal-constant: 0 octal-constant octal-digit hexadecimal-constant: hexadecimal-prefix hexadecimal-digit hexadecimal-constant hexadecimal-digit hexadecimal-prefix: one of 0x 0X binary-literal: 0b binary-digit 0B binary-digit binary-literal binary-digit integer-suffix: unsigned-suffix [long-suffix] unsigned-suffix [long-long-suffix] long-suffix [unsigned-suffix] long-long-suffix [unsigned-sufix] nonzero-digit: 1 2 3 4 5 6 7 8 9 octal-digit: 0 1 2 3 4 5 6 7 hexadecimal-digit: 0 1 2 3 4 5 6 7 8 9 a b c d e f A B C D E F binary-digit: 0 1 unsigned-suffix: one of u U long-suffix: one of l L long-long-suffix: one of ll LL More...
 
bool isIntegerLiteral () const
 
bool isFloatingLiteral () const
 
bool hasUDSuffix () const
 
StringRef getUDSuffix () const
 
unsigned getUDSuffixOffset () const
 
unsigned getRadix () const
 
bool GetIntegerValue (llvm::APInt &Val)
 GetIntegerValue - Convert this numeric literal value to an APInt that matches Val's input width. More...
 
llvm::APFloat::opStatus GetFloatValue (llvm::APFloat &Result)
 GetFloatValue - Convert this numeric literal to a floating value, using the specified APFloat fltSemantics (specifying float, double, etc). More...
 

Static Public Member Functions

static bool isValidUDSuffix (const LangOptions &LangOpts, StringRef Suffix)
 Determine whether a suffix is a valid ud-suffix. More...
 

Public Attributes

bool hadError: 1
 
bool isUnsigned: 1
 
bool isLong: 1
 
bool isLongLong: 1
 
bool isHalf: 1
 
bool isFloat: 1
 
bool isImaginary: 1
 
bool isFloat16: 1
 
bool isFloat128: 1
 
uint8_t MicrosoftInteger
 

Detailed Description

NumericLiteralParser - This performs strict semantic analysis of the content of a ppnumber, classifying it as either integer, floating, or erroneous, determines the radix of the value and can convert it to a useful value.

Definition at line 43 of file LiteralSupport.h.

Constructor & Destructor Documentation

◆ NumericLiteralParser()

NumericLiteralParser::NumericLiteralParser ( StringRef  TokSpelling,
SourceLocation  TokLoc,
Preprocessor PP 
)

integer-constant: [C99 6.4.4.1] decimal-constant integer-suffix octal-constant integer-suffix hexadecimal-constant integer-suffix binary-literal integer-suffix [GNU, C++1y] user-defined-integer-literal: [C++11 lex.ext] decimal-literal ud-suffix octal-literal ud-suffix hexadecimal-literal ud-suffix binary-literal ud-suffix [GNU, C++1y] decimal-constant: nonzero-digit decimal-constant digit octal-constant: 0 octal-constant octal-digit hexadecimal-constant: hexadecimal-prefix hexadecimal-digit hexadecimal-constant hexadecimal-digit hexadecimal-prefix: one of 0x 0X binary-literal: 0b binary-digit 0B binary-digit binary-literal binary-digit integer-suffix: unsigned-suffix [long-suffix] unsigned-suffix [long-long-suffix] long-suffix [unsigned-suffix] long-long-suffix [unsigned-sufix] nonzero-digit: 1 2 3 4 5 6 7 8 9 octal-digit: 0 1 2 3 4 5 6 7 hexadecimal-digit: 0 1 2 3 4 5 6 7 8 9 a b c d e f A B C D E F binary-digit: 0 1 unsigned-suffix: one of u U long-suffix: one of l L long-long-suffix: one of ll LL

floating-constant: [C99 6.4.4.2] TODO: add rules...

Definition at line 526 of file LiteralSupport.cpp.

References clang::Preprocessor::AdvanceToTokenCharacter(), clang::Preprocessor::Diag(), clang::expandUCNs(), clang::Preprocessor::getLangOpts(), hadError, isFloat, isFloat128, isFloat16, isFloatingLiteral(), isHalf, clang::isHexDigit(), isImaginary, isLong, isLongLong, clang::isPreprocessingNumberBody(), isUnsigned, isValidUDSuffix(), and MicrosoftInteger.

Member Function Documentation

◆ GetFloatValue()

llvm::APFloat::opStatus NumericLiteralParser::GetFloatValue ( llvm::APFloat &  Result)

GetFloatValue - Convert this numeric literal to a floating value, using the specified APFloat fltSemantics (specifying float, double, etc).

The optional bool isExact (passed-by-reference) has its value set to true if the returned APFloat can represent the number in the literal exactly, and false otherwise.

Definition at line 992 of file LiteralSupport.cpp.

References min().

Referenced by BuildFloatingLiteral(), and getRadix().

◆ GetIntegerValue()

bool NumericLiteralParser::GetIntegerValue ( llvm::APInt &  Val)

GetIntegerValue - Convert this numeric literal value to an APInt that matches Val's input width.

If there is an overflow (i.e., if the unsigned value read is larger than the APInt's bits will hold), set Val to the low bits of the result and return true. Otherwise, return false.

If there is an overflow, set Val to the low bits of the result and return true. Otherwise, return false.

Definition at line 934 of file LiteralSupport.cpp.

References alwaysFitsInto64Bits(), and clang::C.

Referenced by getRadix().

◆ getRadix()

unsigned clang::NumericLiteralParser::getRadix ( ) const
inline

◆ getUDSuffix()

StringRef clang::NumericLiteralParser::getUDSuffix ( ) const
inline

Definition at line 82 of file LiteralSupport.h.

◆ getUDSuffixOffset()

unsigned clang::NumericLiteralParser::getUDSuffixOffset ( ) const
inline

Definition at line 86 of file LiteralSupport.h.

References isValidUDSuffix().

◆ hasUDSuffix()

bool clang::NumericLiteralParser::hasUDSuffix ( ) const
inline

Definition at line 79 of file LiteralSupport.h.

◆ isFloatingLiteral()

bool clang::NumericLiteralParser::isFloatingLiteral ( ) const
inline

Definition at line 75 of file LiteralSupport.h.

Referenced by NumericLiteralParser().

◆ isIntegerLiteral()

bool clang::NumericLiteralParser::isIntegerLiteral ( ) const
inline

Definition at line 72 of file LiteralSupport.h.

◆ isValidUDSuffix()

bool NumericLiteralParser::isValidUDSuffix ( const LangOptions LangOpts,
StringRef  Suffix 
)
static

Determine whether a suffix is a valid ud-suffix.

We avoid treating reserved suffixes as ud-suffixes, because the diagnostic experience is better if we treat it as an invalid suffix.

Definition at line 758 of file LiteralSupport.cpp.

References clang::Preprocessor::AdvanceToTokenCharacter(), clang::Preprocessor::Diag(), clang::Preprocessor::getLangOpts(), hadError, clang::isDigit(), and clang::isHexDigit().

Referenced by getUDSuffixOffset(), clang::StringLiteralParser::getUDSuffixOffset(), clang::StringLiteralParser::isValidUDSuffix(), and NumericLiteralParser().

Member Data Documentation

◆ hadError

bool clang::NumericLiteralParser::hadError

Definition at line 61 of file LiteralSupport.h.

Referenced by isValidUDSuffix(), and NumericLiteralParser().

◆ isFloat

bool clang::NumericLiteralParser::isFloat

Definition at line 66 of file LiteralSupport.h.

Referenced by NumericLiteralParser().

◆ isFloat128

bool clang::NumericLiteralParser::isFloat128

Definition at line 69 of file LiteralSupport.h.

Referenced by NumericLiteralParser().

◆ isFloat16

bool clang::NumericLiteralParser::isFloat16

Definition at line 68 of file LiteralSupport.h.

Referenced by NumericLiteralParser().

◆ isHalf

bool clang::NumericLiteralParser::isHalf

Definition at line 65 of file LiteralSupport.h.

Referenced by NumericLiteralParser().

◆ isImaginary

bool clang::NumericLiteralParser::isImaginary

Definition at line 67 of file LiteralSupport.h.

Referenced by NumericLiteralParser().

◆ isLong

bool clang::NumericLiteralParser::isLong

Definition at line 63 of file LiteralSupport.h.

Referenced by NumericLiteralParser().

◆ isLongLong

bool clang::NumericLiteralParser::isLongLong

Definition at line 64 of file LiteralSupport.h.

Referenced by NumericLiteralParser().

◆ isUnsigned

bool clang::NumericLiteralParser::isUnsigned

Definition at line 62 of file LiteralSupport.h.

Referenced by NumericLiteralParser().

◆ MicrosoftInteger

uint8_t clang::NumericLiteralParser::MicrosoftInteger

Definition at line 70 of file LiteralSupport.h.

Referenced by NumericLiteralParser().


The documentation for this class was generated from the following files: