Checks for ?: format arguments
global struct init padding
global array initialisation
zero-init memory placed in .bss
char[] initialisation with string constant
if *(const), that deref is a constant in need of a unary-&
array compound literal constness differs from normal literals

- similar to identifiers
Minor rename and removal of unused macro
Catched for packed attribute
__asm__ decl renaming support
Initial data_store refactor for expr_string
Partial removal of data_store
expr_string tests