lang2/lib/parse/parse.c

#include "parse/parse.h"

#include "gen/gen.h"

static int parse_expression(struct l2_lexer *lexer, struct l2_generator *gen) {
	struct l2_token *tok = l2_lexer_peek(lexer, 1);
	struct l2_token *tok2 = l2_lexer_peek(lexer, 2);

	if (tok->kind == L2_TOK_IDENT && tok2->kind == L2_TOK_COLON_EQ) {
		parse_expression(lexer, gen);
		l2_gen_assignment(gen, &tok->v.str);
		return 0;
	} else if (tok->kind == L2_TOK_NUMBER) {
		l2_gen_number(gen, tok->v.num);
		return 0;
	}

	return -1;
}

int l2_parse_program(struct l2_lexer *lexer, struct l2_generator *gen) {
	l2_gen_stack_frame(gen);

	while (1) {
		struct l2_token *tok = l2_lexer_peek(lexer, 1);
		if (tok->kind == L2_TOK_EOF) {
			break;
		}

		if (parse_expression(lexer, gen) < 0) {
			return -1;
		}
	}

	return 0;
}