Whitespace
Whitespace is any non-empty string containing only characters that have the
Pattern_White_Space Unicode property, namely:
- U+0009(horizontal tab,- '\t')
- U+000A(line feed,- '\n')
- U+000B(vertical tab)
- U+000C(form feed)
- U+000D(carriage return,- '\r')
- U+0020(space,- ' ')
- U+0085(next line)
- U+200E(left-to-right mark)
- U+200F(right-to-left mark)
- U+2028(line separator)
- U+2029(paragraph separator)
Rust is a “free-form” language, meaning that all forms of whitespace serve only to separate tokens in the grammar, and have no semantic significance.
A Rust program has identical meaning if each whitespace element is replaced with any other legal whitespace element, such as a single space character.