Odin/src/tilde_expr.cpp

gb_internal cgValue cg_build_expr_internal(cgProcedure *p, Ast *expr);
gb_internal cgValue cg_build_expr(cgProcedure *p, Ast *expr) {
	u16 prev_state_flags = p->state_flags;
	defer (p->state_flags = prev_state_flags);

	if (expr->state_flags != 0) {
		u16 in = expr->state_flags;
		u16 out = p->state_flags;

		if (in & StateFlag_bounds_check) {
			out |= StateFlag_bounds_check;
			out &= ~StateFlag_no_bounds_check;
		} else if (in & StateFlag_no_bounds_check) {
			out |= StateFlag_no_bounds_check;
			out &= ~StateFlag_bounds_check;
		}

		if (in & StateFlag_type_assert) {
			out |= StateFlag_type_assert;
			out &= ~StateFlag_no_type_assert;
		} else if (in & StateFlag_no_type_assert) {
			out |= StateFlag_no_type_assert;
			out &= ~StateFlag_type_assert;
		}

		p->state_flags = out;
	}


	// IMPORTANT NOTE(bill):
	// Selector Call Expressions (foo->bar(...))
	// must only evaluate `foo` once as it gets transformed into
	// `foo.bar(foo, ...)`
	// And if `foo` is a procedure call or something more complex, storing the value
	// once is a very good idea
	// If a stored value is found, it must be removed from the cache
	if (expr->state_flags & StateFlag_SelectorCallExpr) {
		// cgValue *pp = map_get(&p->selector_values, expr);
		// if (pp != nullptr) {
		// 	cgValue res = *pp;
		// 	map_remove(&p->selector_values, expr);
		// 	return res;
		// }
		// cgAddr *pa = map_get(&p->selector_addr, expr);
		// if (pa != nullptr) {
		// 	cgAddr res = *pa;
		// 	map_remove(&p->selector_addr, expr);
		// 	return cg_addr_load(p, res);
		// }
	}

	cgValue res = cg_build_expr_internal(p, expr);

	if (expr->state_flags & StateFlag_SelectorCallExpr) {
		// map_set(&p->selector_values, expr, res);
	}
	return res;
}


gb_internal cgValue cg_build_expr_internal(cgProcedure *p, Ast *expr) {
	return {};
}


gb_internal cgAddr cg_build_addr(cgProcedure *p, Ast *expr) {
	return {};
}