BNF for slang.jj

TERMINALS

Commands

  <IF>:	        "if" 
  <ELSE>:	"else" 
  <WHILE>:	"while" 
  <REPEAT>:	"repeat" 
  <DEFINE>:	"def" 
  <RETURN>:	"return" 
  <SOURCE>:	"source" 

Numbers and identifiers

  <INT>:        (<DIGIT>)+ 
  <ID>:		<LETTER> (<LETTER>|<DIGIT>|<OTHER_IN_ID>)* 
  <LETTER>:	["A"-"Z", "a"-"z"] 
  <DIGIT>:	["0"-"9"] 
  <OTHER_IN_ID>: "_" 
  <STR>:        "\"" (~["\"","\n","\r"])* "\"" 

Punctuation

  <LPAREN>:     "(" 
  <RPAREN>:	")" 
  <LBRACE>:	"{" 
  <RBRACE>:	"}" 
  <LBRACKET>:	"[" 
  <RBRACKET>:	"]" 
  <SEMICOLON>:  ";" 
  <COMMA>:      "," 

Operators

  <ASSIGN>:     "=" 
  <REASSIGN>:	":=" 
  <DEFASSIGN>:  "::=" 
  <OR>:	        "||" 
  <AND>:	"&&" 
  <NOT>:	"~" 
  <BANG>:	"!" 
  <PLUS>:	"+" 
  <MINUS>:	"-" 
  <TIMES>:	"*" 
  <DIV>:	"/" 
  <RELEQ>:	"==" 
  <RELNE>:	"!=" 
  <RELGT>:	">"
  <RELGE>:	">=" 
  <RELLT>:	"<"  
  <RELLE>:	"<=" 

NON-TERMINALS