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Config = Doc .
Doc = Stmt { Stmt } .
Stmt = Word (Assignment | Command) .
# Statements
Assignment = "=" Values br .
Command = [Values] ( Body | br ) .
# Value types
Values = Value {Value} .
Value = Word | String | Number | Boolean .
Body = lbrace [ Doc ] rbrace .
# Atoms
Word = word .
Number = number .
Boolean = boolean .
String = str .
# Primitives
word = (alpha | spec) {alpha | number | spec} .
alpha = `[a-zA-Z]` .
spec = `\$|_` .
number = `-?[0-9]+(\.[0-9]+)?` .
boolean = `true|false` .
str = `"[^"]*"` | `'[^']*'` | '`' { `[^\x60]` } '`' .
lbrace = "{" .
rbrace = "}" .
br = ";" .
white_space = ` |\t|\r|\n|#.*` .
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