This is the formal definition of XC=BASIC's grammar (generated by RR - Railroad Diagram Generator).

NumericLiteral
       ::= '-'? ( '$' | '%' )? [0-9A-F]+ 'd'? ( '.' [0-9]+ )? ( 'E' '-'? [0-9]+ )?

Referenced by:

• Number

Program  ::= Line* EOF

Line     ::= Label? ( Statement ( ':' Statement )* )?

Referenced by:

• Program

Statement
       ::= 'ASM'
         | _CALL
         | _CONST
         | _CONTINUE
         | _DATA
         | _DECLARATION
         | _DIM
         | _DO
         | _LET
         | _END
         | _EXIT
         | _ERROR
         | 'ELSE'
         | _FIELD
         | _FOR
         | _FUNCTION
         | _GENERIC
         | _GET
         | _GOTO
         | _GOSUB
         | _INCBIN
         | _INCLUDE
         | _IF
         | _INPUT
         | _LOOP
         | _NEXT
         | _ON
         | _ORIGIN
         | _PRINT
         | _READ
         | _REM
         | _RETURN
         | _SUB
         | _SWAP
         | _SYS
         | _TYPE
         | _WRITE