文法

 OrEx
 {}
  '||
  OrEx
OrEx
 AndEx
 {}
  '&&
  AndEx
AndEx
 IsEx
 {}
  |
   '!=
   '==
   '>=
   '<=
   '>
   '<
  IsEx
IsEx
 CompEx
 []
  'is
  ResourceVal
CompEx
 ASEx
 {}
  |
   '+
   '-
  ASEx
ASEx
 MDEx
 {}
  |
   '*
   '/
   '%
  MDEx
MDEx
 []
  |
   '-
   '!
 Una
|Una
 IncEx
 Const
 Par
 NewObj
IncEx
 LVal
 []
  |
   '++
   '--
NewObj
 'new
 ResourceVal
 '(
 ArgList
 ')
Par
 '(
 Expr
 ')
Const
 |
  'null
  'NUM
  'STRING
LVal
 LValE
 {}
  '.
  LValE
LValE
 |
  'SYMBOL
  'constructor
 []
  '(
  ArgList
  ')
ResourceVal
 'SYMBOL
 {}
  '.
  'SYMBOL
[]ArgList
 Expr
 {}
  ',
  Expr
Block
 '{
 {}
  Sentence
 '}
Forin
 'for
 '(
 LVal
 'in
 Expr
 ')
 Sentence
While
 'while
 '(
 Expr
 ')
 Sentence
For
 'for
 '(
 Expr
 ';
 Expr
 ';
 Expr
 ')
 Sentence
Break
 'break
 ';
If
 'if
 '(
 Expr
 ')
 Sentence
 []
  'else
  Sentence
Return
 'return
 []
  Expr
 ';
FuncDecl
 |
  'function
  'constructor
  'destructor
 'SYMBOL
 '(
 VArgList
 ')
 VarBlock
NativeDecl
 'native
 'SYMBOL
 ';
[]VArgList
 'SYMBOL
 {}
  ',
  'SYMBOL
VarBlock
 '{
 {}
  VarDecl
 {}
  Sentence
 '}
VarDecl
 'var
 VArgList
 ';