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"

Collaboration diagram for clang::NumericLiteralParser:

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Public Member Functions
	NumericLiteralParser (StringRef TokSpelling, SourceLocation TokLoc, const SourceManager &SM, const LangOptions &LangOpts, const TargetInfo &Target, DiagnosticsEngine &Diags)
	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	isFixedPointLiteral () const

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...

bool	GetFixedPointValue (llvm::APInt &StoreVal, unsigned Scale)
	GetFixedPointValue - Convert this numeric literal value into a scaled integer that represents this value. 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	isSizeT: 1

bool	isHalf: 1

bool	isFloat: 1

bool	isImaginary: 1

bool	isFloat16: 1

bool	isFloat128: 1

uint8_t	MicrosoftInteger

bool	isFract: 1

bool	isAccum: 1

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 42 of file LiteralSupport.h.

Constructor & Destructor Documentation

◆ NumericLiteralParser()

NumericLiteralParser::NumericLiteralParser	(	StringRef	TokSpelling,
		SourceLocation	TokLoc,
		const SourceManager &	SM,
		const LangOptions &	LangOpts,
		const TargetInfo &	Target,
		DiagnosticsEngine &	Diags
	)

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 687 of file LiteralSupport.cpp.

References clang::Lexer::AdvanceToTokenCharacter(), c, clang::expandUCNs(), hadError, isAccum, isFixedPointLiteral(), isFloat, isFloat128, isFloat16, isFloatingLiteral(), isFract, isHalf, isImaginary, isIntegerLiteral(), isLong, isLongLong, clang::isPreprocessingNumberBody(), isSizeT, isUnsigned, isValidUDSuffix(), MicrosoftInteger, clang::DiagnosticsEngine::Report(), SM, and clang::Target.

Member Function Documentation

◆ GetFixedPointValue()

bool NumericLiteralParser::GetFixedPointValue	(	llvm::APInt &	StoreVal,
		unsigned	Scale
	)

GetFixedPointValue - Convert this numeric literal value into a scaled integer that represents this value.

Returns true if an overflow occurred when calculating the integral part of the scaled integer or calculating the digit sequence of the exponent.

Definition at line 1263 of file LiteralSupport.cpp.

References alwaysFitsInto64Bits(), End, IsExponentPart(), and max().

Referenced by clang::Sema::ActOnNumericConstant().

◆ 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 1238 of file LiteralSupport.cpp.

References min().

◆ 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 1180 of file LiteralSupport.cpp.

References alwaysFitsInto64Bits().

Referenced by clang::Sema::ActOnNumericConstant(), EvaluateValue(), and clang::Preprocessor::parseSimpleIntegerLiteral().