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diff --git a/meta/grammar.html b/meta/grammar.html new file mode 100644 index 0000000..074c4a1 --- /dev/null +++ b/meta/grammar.html @@ -0,0 +1,106 @@ +<!doctype html> +<html lang="en"> +<head> +<meta charset="utf-8"> +<meta name="viewport" content="width=device-width, initial-scale=1.0"> +<link rel="stylesheet" href="/fonts/fonts.css"> +<link rel="apple-touch-icon" sizes="180x180" href="/favicon/apple-touch-icon.png"> +<link rel="icon" type="image/png" sizes="32x32" href="/favicon/favicon-32x32.png"> +<link rel="icon" type="image/png" sizes="16x16" href="/favicon/favicon-16x16.png"> +<link rel="manifest" href="/favicon/site.webmanifest"> +<style> +:root {font-size: 15px;} +body {background-color: #111; margin: 2rem;} +pre {color: #ddd; font-family: jetbrains-mono-regular, Consolas, Menlo, monospace; font-style: normal; font-size: 1rem; line-height: 1.5em; white-space: pre-wrap;} +pre a {color: #ddd;} +pre a:link {text-decoration: none; color: #ddd;} +pre a:visited {text-decoration: none; color: #ddd;} +pre a:hover {text-decoration: none; color: #111; background-color: #ddd;} +pre a:active {text-decoration: none; color: #ddd;} +</style> +<title></title> +<meta http-equiv="last-modified" content="2021-11-16 12:20:05-05:00" /> +</head> + +<body> +<pre> +grammar : rule (rule-separator rule)* + +rule : non-terminal separator ':' separator expression + +rule-separator : \x0A \x0A+ + +separator : (\x09 | \x20)+ + | \x0A (\x09 | \x20)* + +non-terminal : ([A-Z] | [a-z] | [-_]) ([0-9] | [A-Z] | [a-z] | [-_])* + +expression : layer-0 + | layer-1 + | layer-2 + +layer-0 : terminal + | non-terminal + +layer-1 : optional + | repetition + | free-monoid + +layer-2 : alternation + | concatenation + | exception + +terminal : string + | hex-literal + | character-set + | extension + +optional : layer-0 '?' + | '(' (layer-1 | layer-2) ')' '?' + +repetition : layer-0 '+' + | '(' (layer-1 | layer-2) ')' '+' + +free-monoid : layer-0 '*' + | '(' (layer-1 | layer-2) ')' '*' + +alternation : alt-operand separator '|' separator alt-operand + +concatenation : con-operand ' ' con-operand + +exception : exc-operand ' - ' exc-operand + +alt-operand : layer-0 + | layer-1 + | '(' layer-2 ')' + | alternation + | concatenation + +con-operand : layer-0 + | layer-1 + | '(' layer-2 ')' + | concatenation + +exc-operand : layer-0 + | layer-1 + | '(' layer-2 ')' + +string : "'" (anything - "'")* "'" + | '"' (anything - '"')* '"' + +hex-literal : '\x' ([0-9] | [A-F])+ + +character-set : '[' (character-list | character-range | extension) ']' + +character-list : anything+ + | hex-literal+ + +character-range : anything '-' anything + | hex-literal '-' hex-literal + +extension : '<' anything+ '>' + +anything : [<all valid UTF-8 characters>] +</pre> +</body> +</html>
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