Ambiguity in the error message on Part 3

[tobby168]

Hi, thanks for the excellent content of the book! I have really learned a lot from it.

However, when I was reading Part 3: Operator Precedence, the error message came from input03 confused me.

syntax error on line 1, token 5          # input03 result

acwj/03_Precedence/input03

Line 1 in 531afba

12 34 + -56 * / - - 8 + * 2

According to the code in expr.c, token 5 should stand for token type = T_INTLIT (in this case, which is 5 in enum). The error message is a little misleading for me since it's unaligned to other common error messages.
Will it be better if set the error message to syntax error on line 1 token 2, token type 5 by adding a global variable to track the pointed token?

acwj/03_Precedence/expr.c

Lines 28 to 43 in 531afba

	// Convert a binary operator token into an AST operation.
	int arithop(int tokentype) {
	switch (tokentype) {
	case T_PLUS:
	return (A_ADD);
	case T_MINUS:
	return (A_SUBTRACT);
	case T_STAR:
	return (A_MULTIPLY);
	case T_SLASH:
	return (A_DIVIDE);
	default:
	fprintf(stderr, "syntax error on line %d, token %d\n", Line, tokentype);
	exit(1);
	}
	}

Same issue also on

acwj/03_Precedence/expr.c

Lines 10 to 25 in 531afba

	static struct ASTnode *primary(void) {
	struct ASTnode *n;
	// For an INTLIT token, make a leaf AST node for it
	// and scan in the next token. Otherwise, a syntax error
	// for any other token type.
	switch (Token.token) {
	case T_INTLIT:
	n = mkastleaf(A_INTLIT, Token.intvalue);
	scan(&Token);
	return (n);
	default:
	fprintf(stderr, "syntax error on line %d, token %d\n", Line, Token.token);
	exit(1);
	}
	}

Thanks again😃