c++ - union Initializer "error: expected primary-expression before ‘.’ token" -

i'm trying compile c code c++ compiler written else, got "error: expected primary-expression before ‘.’ token." how initialize union in case? in advance.

union v16b {     v16qi v;     uint8_t b[16];     uint32_t dw[4]; };  union v8w {     v8hi v;     int16_t w[8]; };  union v2qw {     v2di v;     uint64_t uq[2]; };  static inline void sd(v16qi a, v16qi b, v16qi c, v16qi d, uint16_t local_mean[4], int16_t *response) {     const union v16b 0 = { .b = { 0 }};      const union v16b shuf = { .b = { 0, 4, 8, 12, 1, 5, 9, 13, 2, 6, 10, 14, 3, 7, 11, 15 }}; ...... } 

c++ not support initialization designators. statement

const union v16b 0 = { .b = { 0 }}; 

has syntax error in c++.

this syntax adopted in c. either compile program c-program or change definition according syntax of c++.

if need initialize data member write constructor. example

union v16b {     v16b() : b { 0 ) {}     v16qi v;     uint8_t b[16];     uint32_t dw[4]; };