#
#  The grammar for insert
#

start: 
  statementList
;

statementList:
  #empty
  |
  statement statementList
;

statement:
  'insert' insertStatement 'semi-colon'
;   

insertStatement:
  'edge'  node 'comma' node properties
;    

properties:
  # empty
  | 
  propertyList
; 

propertyList:
  'left parenthesis' property propertyListContinues 'right parenthesis'
;

propertyListContinues:
  # empty
  | 
  'comma' property propertyListContinues 
;

property:
  'identifier' propertyContinues
;

propertyContinues:
  requiredProperty
  | 
  optionalProperty
;
  
requiredProperty:
  'exclamation mark' literal
;

optionalProperty:
  'colon' literal
;

node:
  'object'
  | 
  literal 
;

literal:
  'identifier'
  | 
  'timeInterval' 
  | 
  'integer' 
  | 
  'string'
;