[FEATURE] .CONTENT inside a macro?

[cyraid]

This is not too high priority, but being able to insert content in a macro would unlock things like:

.MACRO Data ARGS label
\1:
  .IF has("content")
    .CONTENT ; Replaces this with the block that's provided when executed
  .ELSE
    .FAIL "Need content for Data"
  .ENDIF
  \1End:
  \1Size = (\1End - \1)
.ENDM

.MACRO Proc ARGS procLabel, flags
\1:
  ; Pre-Content pushing, etc.
  .IF has("content")
    .CONTENT ; Replaces this with the block that's provided when executed
  .ELSE
    .FAIL "Need Code for Procedure"
  .ENDIF
  ; Post-Content popping, etc.
  ; RTL/RTS (depending on flags)
.ENDM

Data &someDataBlock {
  .DW $0000
  .DW $0001
}

Data &someStr { .BYTE "test" }

Proc &someProc {
  Param &A, 0
  Param &B, 2

  ; Code here

}

; Use someDataBlock as a label, and it's size someDataBlockSize

For whenever you've had a nice break and feel nice and rested! Hope you're doing well. Sorry for all the free-time absorbing requests!