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FAsciiSet

ASCII character bitset useful for fast and readable parsing

Unreal Engine C++ API Reference > Runtime > Core > Misc

References

   
Module Core
Header /Engine/Source/Runtime/Core/Public/Misc/AsciiSet.h
Include #include "Misc/AsciiSet.h"

Syntax

class FAsciiSet

Remarks

ASCII character bitset useful for fast and readable parsing

Entirely constexpr. Works with both wide and narrow strings.

Example use cases:

constexpr FAsciiSet WhitespaceCharacters(" \v\f\t\r\n"); bool bIsWhitespace = WhitespaceCharacters.Test(MyChar); const char* HelloWorld = FAsciiSet::Skip(" \t\tHello world!", WhitespaceCharacters);

constexpr FAsciiSet XmlEscapeChars("&<>"'"); check(FAsciiSet::HasNone(EscapedXmlString, XmlEscapeChars));

constexpr FAsciiSet Delimiters(".:;"); const TCHAR* DelimiterOrEnd = FAsciiSet::FindFirstOrEnd(PrefixedName, Delimiters); FString Prefix(PrefixedName, DelimiterOrEnd - PrefixedName);

constexpr FAsciiSet Slashes("/\"); const TCHAR* SlashOrEnd = FAsciiSet::FindLastOrEnd(PathName, Slashes); const TCHAR* FileName = *SlashOrEnd ? SlashOrEnd + 1 : PathName;

Constructors

  Type Name Description
Public function constexpr

FAsciiSet ( const CharType(&) Chars
)

  

Functions

  Type Name Description
Public function Const constexpr bool

Contains ( CharType Char
)

 Returns true if a character is part of the set
Public function Static constexpr const CharType *

FindFirstOrEnd ( const CharType* Str,
FAsciiSet Set
)

 Find first character of string inside set or end pointer. Never returns null.
Public function Static constexpr const CharType *

FindLastOrEnd ( const CharType* Str,
FAsciiSet Set
)

 Find last character of string inside set or end pointer. Never returns null.
Public function Static constexpr StringType

FindPrefixWith ( const StringType& Str,
FAsciiSet Set
)

 Get initial substring with all characters in set
Public function Static constexpr StringType

FindPrefixWithout ( const StringType& Str,
FAsciiSet Set
)

 Get initial substring with no characters in set
Public function Static constexpr StringType

FindSuffixWith ( const StringType& Str,
FAsciiSet Set
)

 Get trailing substring with all characters in set
Public function Static constexpr StringType

FindSuffixWithout ( const StringType& Str,
FAsciiSet Set
)

 Get trailing substring with no characters in set
Public function Static constexpr bool

HasAny ( const StringType& Str,
FAsciiSet Set
)

 Test if string contains any character in set
Public function Static constexpr bool

HasAny ( const CharType* Str,
FAsciiSet Set
)

 Test if string contains any character in set
Public function Static constexpr bool

HasNone ( const StringType& Str,
FAsciiSet Set
)

 Test if string contains no character in set
Public function Static constexpr bool

HasNone ( const CharType* Str,
FAsciiSet Set
)

 Test if string contains no character in set
Public function Static constexpr bool

HasOnly ( const StringType& Str,
FAsciiSet Set
)

 Test if string contains any character outside of set
Public function Static constexpr bool

HasOnly ( const CharType* Str,
FAsciiSet Set
)

 Test if string contains any character outside of set
Public function Static constexpr const CharType *

Skip ( const CharType* Str,
FAsciiSet Set
)

 Find first character of string outside of set. Never returns null.
Public function Const constexpr uint64

Test ( CharType Char
)

 Returns non-zero if a character is part of the set.
Public function Static constexpr StringType

TrimPrefixWith ( const StringType& Str,
FAsciiSet Set
)

 Trim initial characters in set
Public function Static constexpr StringType

TrimPrefixWithout ( const StringType& Str,
FAsciiSet Set
)

 Trim initial characters not in set
Public function Static constexpr StringType

TrimSuffixWith ( const StringType& Str,
FAsciiSet Set
)

 Trim trailing characters in set
Public function Static constexpr StringType

TrimSuffixWithout ( const StringType& Str,
FAsciiSet Set
)

 Trim trailing characters not in set

Operators

  Type Name Description
Public function Const constexpr FAsciiSet Create new set containing inverse set of characters - likely including null-terminator
Public function Const constexpr FAsciiSet

operator+ ( char Char
)

 Create new set with specified character in it

Enums

  Type Name Description
Private enum EDir    
Private enum EInclude    
Private enum EKeep    

Constants

Name Description
NilMask  

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