[#absl-CharSet]
= xref:absl.adoc[absl]::CharSet
:relfileprefix: ../
:mrdocs:

A fast, bit‐vector set of 8‐bit unsigned characters.

== Synopsis

Declared in `<absl/strings/charset.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
class CharSet;
----

== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:absl/CharSet/2constructor-09.adoc[`CharSet`]         [.small]#[constructor]#
| Constructors
| xref:absl/CharSet/contains.adoc[`contains`] 
| Tests whether the set contains a given character.
| xref:absl/CharSet/empty.adoc[`empty`] 
| Tests whether the set is empty.
|===


== Static Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:absl/CharSet/AsciiAlphabet.adoc[`AsciiAlphabet`] 
| The set of ASCII letters.
| xref:absl/CharSet/AsciiAlphanumerics.adoc[`AsciiAlphanumerics`] 
| The set of ASCII letters and digits.
| xref:absl/CharSet/AsciiDigits.adoc[`AsciiDigits`] 
| The set of ASCII decimal digits.
| xref:absl/CharSet/AsciiHexDigits.adoc[`AsciiHexDigits`] 
| The set of ASCII hexadecimal digits.
| xref:absl/CharSet/AsciiLowercase.adoc[`AsciiLowercase`] 
| The set of ASCII lowercase letters.
| xref:absl/CharSet/AsciiPrintable.adoc[`AsciiPrintable`] 
| The set of printable ASCII characters.
| xref:absl/CharSet/AsciiPunctuation.adoc[`AsciiPunctuation`] 
| The set of ASCII punctuation characters.
| xref:absl/CharSet/AsciiUppercase.adoc[`AsciiUppercase`] 
| The set of ASCII uppercase letters.
| xref:absl/CharSet/AsciiWhitespace.adoc[`AsciiWhitespace`] 
| The set of ASCII whitespace characters.
| xref:absl/CharSet/Char.adoc[`Char`] 
| Containing only a single specified char.
| xref:absl/CharSet/Range.adoc[`Range`] 
| Containing all the chars in the closed interval [lo,hi].
|===


== Friends

[cols="1,4"]
|===
| Name| Description
| `xref:absl/operator_bitnot-018.adoc[absl::operator~]`
| Computes the complement of a character set.
| `xref:absl/operator_bitor-0d.adoc[absl::operator|]`
| Computes the union of two character sets.
| `xref:absl/operator_bitand-04.adoc[absl::operator&]`
| Computes the intersection of two character sets.
|===


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