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Extended Backus–Naur form ([EBNF][]) is a metalanguage used to specify language grammars. [EBNF]: https://en.wikipedia.org/wiki/Extended_Backus–Naur_form
25 lines
717 B
EBNF
25 lines
717 B
EBNF
(*
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Source: https://github.com/sunjay/lion
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License: MIT
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*)
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Statement = ( NamedFunction | AnonymousFunction | Assignment | Expr ) , "\n" ;
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Expr = AnonymousFunction | Term | "(" , Expr , ")" ,
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{ AnonymousFunction | Term | "(" , Expr , ")" } ;
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Assignment = Symbol , "=" , Expr ;
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AnonymousFunction = "\" , FunctionRHS ;
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NamedFunction = Symbol , FunctionRHS ;
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FunctionRHS = FunctionParams , "=" , FunctionBody ;
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FunctionParams = FunctionParam , { FunctionParam } ;
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FunctionParam = Term ;
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FunctionBody = Expr ;
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Term = Symbol | Number | SingleWordString ;
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SingleWordString = '"' , Symbol , '"' ;
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(* Symbol is a collection of valid symbol characters, not defined here *)
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(* Number is a valid numeric literal *)
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