awesome.y

token IF ELSE
token DEF
token CLASS
token NEWLINE
token NUMBER
token STRING
token TRUE FALSE NIL
token IDENTIFIER
token CONSTANT

Root:
| Expressions
;

Expressions:
  Expression
| Expressions Terminator Expression
| Expressions Terminator
| Terminator
;

Expression:
  Literal
| Call
| Operator
| Constant
| Assign
| Def
| Class
| If
| '(' Expression ')'
;

Terminator:
  NEWLINE
| ";"
;

Literal:
  NUMBER
| STRING
| TRUE
| FALSE
| NIL
;

Call:
  IDENTIFIER
| IDENTIFIER "(" ArgList ")"
| Expression "." IDENTIFIER
| Expression "."
    IDENTIFIER "(" ArgList ")"
;

ArgList:
  // nothing
| Expression
| ArgList "," Expression

Operator:
  Expression '||' Expression
| Expression '&&' Expression
| Expression '==' Expression
| Expression '!=' Expression
| Expression '>' Expression
| Expression '>=' Expression
| Expression '<' Expression
| Expression '<=' Expression
| Expression '+' Expression
| Expression '-' Expression
| Expression '*' Expression
| Expression '/' Expression
;

Constant:
  CONSTANT
;

Assign:
  IDENTIFIER "=" Expression
| CONSTANT "=" Expression
;

Def:
  DEF IDENTIFIER Block
| DEF IDENTIFIER"(" ParamList ")" Block
;


ParamList:
// nothing
| IDENTIFIER
| ParamList "," IDENTIFIER
;

Class:
  CLASS CONSTANT Block
;

If:
  IF Expression Block
;

Block:
  INDENT Expressions DEDENT