Grammar - mfichman/jogo GitHub Wiki

file ::= fileelem | [ file ]

fileelem ::= func | class | constant

func ::= FuncName funcbody

class ::= Class '<' Class '{' classbody '}'

classbody := classelem | [ classbody ]

classelem := func | Constant | var 

funcbody ::= '(' [ parlist ] ')' block

expr ::= while expr block | 
         for Name  in expr ')' block |
         let letlist block | 
         funcliteral |
         if expr block { else if expr block } [ else block ] 
         expr | '(' | 
         nil | false | true | Number | String | 
         expr binop expr | 
         unop expr |  
         hash | array
         expr '[' expr ']' | 
         expr '[' expr ']' '=' |
         expr '(' [ arglist ] ')' [ funcliteral ] |
         Class '(' [ arglist ] ')' [ funcliteral ] |
         var | 
         ret [ expr ]

funcliteral ::= func Name funcbody

hash ::= '{' [ hashbody ] '}'

hashbody ::= hashelem [ ',' hashbody ]

hashelem ::= expr ':' 'expr'

array := '{' [ arraybody ] '}'

arraybody ::= expr [ ',' arraybody ]

varlist ::= var [ ',' varlist ]

var ::= Name [ Type ] [ '=' expr ]

parlist ::= formal [ ',' parlist ]

par ::= Name [ Type ]

arglist ::= expr [ ',' arglist ] 

block ::= '{' exprlist '}'

exprlist ::= expr [ '\n' exprlist ]

binop ::= '+' | '-' | '*' | '/' | '^' | '%' | '<' | '>' | '=='
          '<=' | '>=' | and | or 

unop ::= '--' | '++' | not | '-'

FuncName @?[a-z][a-zA-Z0-9_]*[!?]?
Name = [a-z][a-zA-Z0-9_]*
Type = [A-Z][a-zA-Z0-9_]*
Constant = [A-Z0-9_]+