types: add ability to mark array and object values as constant

The upcoming module import support requires constant object values to
implement module wildcard import.

Reuse the existing u64 bit in ucv heads to mark array or object values
as constant and add corresponding `ucv_is_constant()` and
`ucv_set_constant()` helpers.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

0 files changed, 0 insertions, 0 deletions