Characters
The following terms are used to denote specific Unicode character categories:
newline = /* the Unicode code point U+000A */ .
unicode_char = /* an arbitrary Unicode code point except newline */ .
unicode_letter = /* a Unicode code point categorized as "Letter" */ .
unicode_digit = /* a Unicode code point categorized as "Number, decimal digit" */ .
In The Unicode Standard 8.0,
Section 4.5 "General Category" defines a set of character categories.
Go treats all characters in any of the Letter categories Lu, Ll, Lt, Lm, or Lo
as Unicode letters, and those in the Number category Nd as Unicode digits.
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The Go Programming Language Specification - The Go Programming Language tools, a compiler may ignore a UTF-8-encoded byte order mark (U+FEFF) if it is the first Unicode code point in the source text. A byte order mark may be disallowed anywhere else in the source. <span>Characters The following terms are used to denote specific Unicode character categories: newline = /* the Unicode code point U+000A */ . unicode_char = /* an arbitrary Unicode code point except newline */ . unicode_letter = /* a Unicode code point categorized as "Letter" */ . unicode_digit = /* a Unicode code point categorized as "Number, decimal digit" */ . In The Unicode Standard 8.0, Section 4.5 "General Category" defines a set of character categories. Go treats all characters in any of the Letter categories Lu, Ll, Lt, Lm, or Lo as Unicode letters, and those in the Number category Nd as Unicode digits. Letters and digits The underscore character _ (U+005F) is considered a lowercase letter. letter = unicode_letter | "_" . decimal_digit = "0" … "9" . binary_digit = "0" | "1" . octal_dig Summary
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