FAsciiSet

ASCII character bitset useful for fast and readable parsing

Windows
MacOS
Linux

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;

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

Name Description

Public function

FAsciiSet

(
    const CharType(&) Chars
)

Functions

Name Description

Public function Const

constexpr bo...

 

Contains

(
    CharType Char
)

Returns true if a character is part of the set

Public function Static

constexpr co...

 

FindFirstOrEnd

(
    const CharType* Str,
    FAsciiSet Set
)

Find first character of string inside set or end pointer. Never returns null.

Public function Static

constexpr co...

 

FindLastOrEnd

(
    const CharType* Str,
    FAsciiSet Set
)

Find last character of string inside set or end pointer. Never returns null.

Public function Static

constexpr bo...

 

HasAny

(
    const CharType* Str,
    FAsciiSet Set
)

Test if string contains any character in set

Public function Static

constexpr bo...

 

HasNone

(
    const CharType* Str,
    FAsciiSet Set
)

Test if string contains no character in set

Public function Static

constexpr bo...

 

HasOnly

(
    const CharType* Str,
    FAsciiSet Set
)

Test if string contains any character outside of set

Public function Static

constexpr co...

 

Skip

(
    const CharType* Str,
    FAsciiSet Set
)

Find first character of string outside of set. Never returns null.

Public function Const

constexpr ui...

 

Test

(
    CharType Char
)

Returns non-zero if a character is part of the set.

Operators

Name Description

Public function Const

constexpr FA...

 

operator~()

Create new set containing inverse set of characters - likely including null-terminator

Public function Const

constexpr FA...

 

operator+

(
    char Char
)

Create new set with specified character in it

Constants

Name

Description

NilMask
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