Pipe-Math Grammar Definition

/* <stmt> ::= */ r(
        NT(EXPR), TK(SEMI)
),
/* <expr> ::= */ r(
        NT(EXPONENTIATION_EXPR), TK(PIPE), NT(PIPE_EXPR)
alt     NT(EXPONENTIATION_EXPR)
)
,
/* <exponentiation_expr> ::= */
        rrr(EXPONENTIATION_EXPR, (TK(NUM)), (TK(CARET), TK(NUM))),
/* this also expands to <exponentiation_expr_rest> */
 
/* <pipe_expr> ::= */
        rrr(PIPE_EXPR, (NT(FUNCTION_CALL)), (TK(PIPE), NT(FUNCTION_CALL))),
/* similarly, this also expands to <pipe_expr_rest> */
 
/* <function_arg_ls> ::= */
        rrr(FUNCTION_ARG_LS, (NT(EXPR)), (TK(COMMA), NT(EXPR)))
/* <function_arg_ls_rest> */
,
/* <function_call> ::= */ r(
        TK(IDENT), TK(LPAREN), NT(FUNCTION_ARG_LS), TK(RPAREN)
alt     TK(IDENT)
)