test.y

%token keyword_nil

%token tLPAREN tRPAREN      // ()
%token tLBRACE tRBRACE      // {}
%token tLBRACKET tRBRACKET  // {}
%token tPIPE                // |
%token tCOLON               // :
%token tSEMICOLON           // ;
%token tDOT                 // .
%token tCOMMA               // ,
%token tASSIGN              // =
%token tNUMBER              // <number>
%token tSTRING              // Contents of a quoted string
%token tIDENTIFIER          // An identifier, non quoted string matching [a-zA-Z0-9_]+

%{
%}

%%
program:
	  | expr
	;

call:
	  expr tCOLON args tSEMICOLON
	| expr tSEMICOLON
	;
args:
	  expr tIDENTIFIER tCOLON args
	| expr tCOLON args /* Never reduced */
	| expr             /* never reduced */
	;

block:
	  tLBRACE argDefs tPIPE expr tRBRACE
	| tLBRACE expr tRBRACE
	;

argDefs:
	  argDef tIDENTIFIER tCOLON argDefs
	| argDef tCOLON argDefs
	| argDef
	;
argDef:
	  tIDENTIFIER

varDef:
	  var tASSIGN expr
	;
var:
	  tIDENTIFIER
	;

expr:
	 var
	| varDef
	| block
	| objAccess
	| obj
	| tLPAREN expr tRPAREN
	| literal
	| call
	;

obj:
	  tLBRACKET tRBRACKET
	| tLBRACKET objMembers tRBRACKET
	;
objMembers:
	| objMembers tCOMMA objMembers
	| objMember
	;
objMember:
	  tIDENTIFIER tASSIGN expr
	;

objAccess:
	  var tDOT tIDENTIFIER
	;

literal:
	  tNUMBER
	| tSTRING
	;
%%