grammar.h

#ifndef PM_GRAMMAR_H
#define PM_GRAMMAR_H
 
#include <rdesc/rdesc.h>
 
#include <stdint.h>
#include <stdio.h>
 
#include <rdesc/grammar.h>
 
/* let's use `pm` as abbreviation for Pipe-Math. */
#define PM_PRODUCTION_COUNT 9
#define PM_MAX_ALTERNATIVE_COUNT 2
#define PM_MAX_ALTERNATIVE_SIZE 4
 
extern struct rdesc_grammar_symbol pm_grammar[PM_PRODUCTION_COUNT]
                                             [PM_MAX_ALTERNATIVE_COUNT + 1]
                                             [PM_MAX_ALTERNATIVE_SIZE + 1];
 
enum pm_tk {
        TK_NUM = 1,  // ⟨Num⟩
        TK_IDENT,  // ⟨Identifier⟩
        TK_LPAREN /* ( */, TK_RPAREN /* ) */,
        TK_PIPE /* | */, TK_CARET /* ^ */,
        TK_COMMA /* , */, TK_SEMI /* ; */,
};
 
enum pm_nt {
        /* ⟨Stmt⟩, ⟨Expr⟩ */
        NT_STMT, NT_EXPR,
 
        /* ⟨Num⟩ (^ ⟨Num⟩)* */
        NT_EXPONENTIATION_EXPR, NT_EXPONENTIATION_EXPR_REST,
        /* ⟨FunctionCall⟩ (| ⟨FunctionCall⟩)* */
        NT_PIPE_EXPR, NT_PIPE_EXPR_REST,
 
        /* We will define ⟨PipeExpr⟩ as right-associative for now. Later, we
         * will use flip function to convert pipe operator left-associative. */
 
        /* ⟨Expr⟩ (, ⟨Expr⟩)* */
        NT_FUNCTION_ARG_LS, NT_FUNCTION_ARG_LS_REST,
 
        NT_FUNCTION_CALL,
};
 
extern const char *tk_names[];
 
extern const char *nt_names[];
 
extern const char exblex_tks[];
 
void tk_destroyer(uint16_t id, void *);
 
void node_printer(FILE *out, const struct rdesc_node *);
 
 
#endif