DMD marks arrays as 64bit integers and associative arrays as void-pointer.
As discussed in the newsgroup, new CodeView types could be defined for D aware debuggers as follows:
Dynamic (integer indexed) arrays could be marked with type 0x0017, which is the first unused leaf index in the 16bit NB09 CodeView specs. The type leaf needs to include the type of the array's elements. Therefore, it could look like this (the first number indicates the size in bytes):
2 LF_DYN_ARRAY (define as 0x0017)
2 @elemtype
elemtype is the type index of the array's value type.
For associative arrays the leaf could accordingly have this format:
2 LF_ASSOC_ARRAY (define as 0x0018)
2 @elemtype
2 @keytype
Alternatively, if the 32bit NB09 CodeView specs (MSDN Library January 2000) would be used, one could reuse the "(0x100b) Basic Array" type for dynamic arrays and "(0x100c) Multiply Dimensioned Array" for associative arrays. But that would also mean to implement a lot more from that spec.
Comment #1 by r.sagitario — 2019-05-12T15:29:58Z
Some ages ago, OEM types have been implemented for OMF, COFF uses specific structs with nested types.