Anonynous struct + compound literal results in lint error

Question

I have a multiple structs (modeled after the types of definitions used by the microchip compiler, although this is not a microchip application) in my embedded, C99 compatible program . Here is a typical example:

typedef struct
{
  union
  {
    struct
    {
      CommandDirection_t ReadWrite  : 1;
      RegisterAddress_t Register    : 7;
    };
    uint8_t Byte;
  };
} MemsAccelCommand_t;

CommandDirection_t and RigisterAddress_t are enums. Later in my code I declare and initialize my struct:

MemsAccelCommand_t command = { .ReadWrite = CMD_Read };

This compiles with no warnings or errors, however when I lint the file, I get the error: "Error 65: Expected a member name".

How can I tweak my code so that the lint error is no longer raised, or what can I do to disable a lint warning for this (aside from disabling error 65)?

Answer 1

Give the union and the innermost structure a name, as in:

typedef struct
{
  union
  {
    struct
    {
      CommandDirection_t ReadWrite  : 1;
      RegisterAddress_t Register    : 7;
    } Byte_struct;
    uint8_t Byte;
  } Byte_union;
} MemsAccelCommand_t;

Otherwise, how do you plan to access the union fields? The union must have a name.