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std/unicode ​

Character classification and case conversion for ASCII/UTF-8 bytes.

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from "std/unicode" import { isAlpha, isDigit, isWhitespace, toLowerChar, toUpperChar, isNumeric }

Functions ​

isAscii ​

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fn isAscii(c: u8): bool

Returns true if c is in the ASCII range (0-127).

isDigit ​

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fn isDigit(c: u8): bool

Returns true if c is an ASCII digit (0-9).

isLower ​

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fn isLower(c: u8): bool

Returns true if c is a lowercase ASCII letter.

isUpper ​

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fn isUpper(c: u8): bool

Returns true if c is an uppercase ASCII letter.

isAlpha ​

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fn isAlpha(c: u8): bool

Returns true if c is an ASCII letter (a-z, A-Z).

isAlphanumeric ​

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fn isAlphanumeric(c: u8): bool

Returns true if c is an ASCII letter or digit.

isWhitespace ​

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fn isWhitespace(c: u8): bool

Returns true if c is an ASCII whitespace character (space, tab, newline, etc.).

isPunctuation ​

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fn isPunctuation(c: u8): bool

Returns true if c is an ASCII punctuation character.

isHexDigit ​

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fn isHexDigit(c: u8): bool

Returns true if c is a hexadecimal digit (0-9, a-f, A-F).

isPrintable ​

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fn isPrintable(c: u8): bool

Returns true if c is a printable ASCII character (0x20-0x7E).

isControl ​

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fn isControl(c: u8): bool

Returns true if c is an ASCII control character (0x00-0x1F, 0x7F).

toLowerChar ​

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fn toLowerChar(c: u8): u8

Converts an uppercase ASCII letter to lowercase. Non-letters pass through unchanged.

toUpperChar ​

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fn toUpperChar(c: u8): u8

Converts a lowercase ASCII letter to uppercase. Non-letters pass through unchanged.

isNumeric ​

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fn isNumeric(s: &string): bool

Returns true if every byte in the string is an ASCII digit.

isAlphaStr ​

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fn isAlphaStr(s: &string): bool

Returns true if every byte in the string is an ASCII letter.