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Lexer

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Alex edited this page Jan 23, 2020 · 2 revisions

Symbols

Symbol	Expression
E (Sigma)	All symbols in alphabet
Letter	a..z \| A..Z
Digit	0..9
Nonzero	1..9
Alphanum	Letter \| digit \| _
Whitespace	All whitespace except `\n`

Note on notation used

Letter\{'A'} means all symbols in Letter except the symbol A