reuse the host::* consts in enum Error

src/error.rs

@@ -5,84 +5,85 @@ use std::fmt;
 use std::num::TryFromIntError;
 
 #[derive(Clone, Copy, Debug, Fail)]
+#[repr(u16)]
 pub enum WasiError {
-    ESUCCESS = 0,
-    E2BIG = 1,
-    EACCES = 2,
-    EADDRINUSE = 3,
-    EADDRNOTAVAIL = 4,
-    EAFNOSUPPORT = 5,
-    EAGAIN = 6,
-    EALREADY = 7,
-    EBADF = 8,
-    EBADMSG = 9,
-    EBUSY = 10,
-    ECANCELED = 11,
-    ECHILD = 12,
-    ECONNABORTED = 13,
-    ECONNREFUSED = 14,
-    ECONNRESET = 15,
-    EDEADLK = 16,
-    EDESTADDRREQ = 17,
-    EDOM = 18,
-    EDQUOT = 19,
-    EEXIST = 20,
-    EFAULT = 21,
-    EFBIG = 22,
-    EHOSTUNREACH = 23,
-    EIDRM = 24,
-    EILSEQ = 25,
-    EINPROGRESS = 26,
-    EINTR = 27,
-    EINVAL = 28,
-    EIO = 29,
-    EISCONN = 30,
-    EISDIR = 31,
-    ELOOP = 32,
-    EMFILE = 33,
-    EMLINK = 34,
-    EMSGSIZE = 35,
-    EMULTIHOP = 36,
-    ENAMETOOLONG = 37,
-    ENETDOWN = 38,
-    ENETRESET = 39,
-    ENETUNREACH = 40,
-    ENFILE = 41,
-    ENOBUFS = 42,
-    ENODEV = 43,
-    ENOENT = 44,
-    ENOEXEC = 45,
-    ENOLCK = 46,
-    ENOLINK = 47,
-    ENOMEM = 48,
-    ENOMSG = 49,
-    ENOPROTOOPT = 50,
-    ENOSPC = 51,
-    ENOSYS = 52,
-    ENOTCONN = 53,
-    ENOTDIR = 54,
-    ENOTEMPTY = 55,
-    ENOTRECOVERABLE = 56,
-    ENOTSOCK = 57,
-    ENOTSUP = 58,
-    ENOTTY = 59,
-    ENXIO = 60,
-    EOVERFLOW = 61,
-    EOWNERDEAD = 62,
-    EPERM = 63,
-    EPIPE = 64,
-    EPROTO = 65,
-    EPROTONOSUPPORT = 66,
-    EPROTOTYPE = 67,
-    ERANGE = 68,
-    EROFS = 69,
-    ESPIPE = 70,
-    ESRCH = 71,
-    ESTALE = 72,
-    ETIMEDOUT = 73,
-    ETXTBSY = 74,
-    EXDEV = 75,
-    ENOTCAPABLE = 76,
+    ESUCCESS = host::__WASI_ESUCCESS,
+    E2BIG = host::__WASI_E2BIG,
+    EACCES = host::__WASI_EACCES,
+    EADDRINUSE = host::__WASI_EADDRINUSE,
+    EADDRNOTAVAIL = host::__WASI_EADDRNOTAVAIL,
+    EAFNOSUPPORT = host::__WASI_EAFNOSUPPORT,
+    EAGAIN = host::__WASI_EAGAIN,
+    EALREADY = host::__WASI_EALREADY,
+    EBADF = host::__WASI_EBADF,
+    EBADMSG = host::__WASI_EBADMSG,
+    EBUSY = host::__WASI_EBUSY,
+    ECANCELED = host::__WASI_ECANCELED,
+    ECHILD = host::__WASI_ECHILD,
+    ECONNABORTED = host::__WASI_ECONNABORTED,
+    ECONNREFUSED = host::__WASI_ECONNREFUSED,
+    ECONNRESET = host::__WASI_ECONNRESET,
+    EDEADLK = host::__WASI_EDEADLK,
+    EDESTADDRREQ = host::__WASI_EDESTADDRREQ,
+    EDOM = host::__WASI_EDOM,
+    EDQUOT = host::__WASI_EDQUOT,
+    EEXIST = host::__WASI_EEXIST,
+    EFAULT = host::__WASI_EFAULT,
+    EFBIG = host::__WASI_EFBIG,
+    EHOSTUNREACH = host::__WASI_EHOSTUNREACH,
+    EIDRM = host::__WASI_EIDRM,
+    EILSEQ = host::__WASI_EILSEQ,
+    EINPROGRESS = host::__WASI_EINPROGRESS,
+    EINTR = host::__WASI_EINTR,
+    EINVAL = host::__WASI_EINVAL,
+    EIO = host::__WASI_EIO,
+    EISCONN = host::__WASI_EISCONN,
+    EISDIR = host::__WASI_EISDIR,
+    ELOOP = host::__WASI_ELOOP,
+    EMFILE = host::__WASI_EMFILE,
+    EMLINK = host::__WASI_EMLINK,
+    EMSGSIZE = host::__WASI_EMSGSIZE,
+    EMULTIHOP = host::__WASI_EMULTIHOP,
+    ENAMETOOLONG = host::__WASI_ENAMETOOLONG,
+    ENETDOWN = host::__WASI_ENETDOWN,
+    ENETRESET = host::__WASI_ENETRESET,
+    ENETUNREACH = host::__WASI_ENETUNREACH,
+    ENFILE = host::__WASI_ENFILE,
+    ENOBUFS = host::__WASI_ENOBUFS,
+    ENODEV = host::__WASI_ENODEV,
+    ENOENT = host::__WASI_ENOENT,
+    ENOEXEC = host::__WASI_ENOEXEC,
+    ENOLCK = host::__WASI_ENOLCK,
+    ENOLINK = host::__WASI_ENOLINK,
+    ENOMEM = host::__WASI_ENOMEM,
+    ENOMSG = host::__WASI_ENOMSG,
+    ENOPROTOOPT = host::__WASI_ENOPROTOOPT,
+    ENOSPC = host::__WASI_ENOSPC,
+    ENOSYS = host::__WASI_ENOSYS,
+    ENOTCONN = host::__WASI_ENOTCONN,
+    ENOTDIR = host::__WASI_ENOTDIR,
+    ENOTEMPTY = host::__WASI_ENOTEMPTY,
+    ENOTRECOVERABLE = host::__WASI_ENOTRECOVERABLE,
+    ENOTSOCK = host::__WASI_ENOTSOCK,
+    ENOTSUP = host::__WASI_ENOTSUP,
+    ENOTTY = host::__WASI_ENOTTY,
+    ENXIO = host::__WASI_ENXIO,
+    EOVERFLOW = host::__WASI_EOVERFLOW,
+    EOWNERDEAD = host::__WASI_EOWNERDEAD,
+    EPERM = host::__WASI_EPERM,
+    EPIPE = host::__WASI_EPIPE,
+    EPROTO = host::__WASI_EPROTO,
+    EPROTONOSUPPORT = host::__WASI_EPROTONOSUPPORT,
+    EPROTOTYPE = host::__WASI_EPROTOTYPE,
+    ERANGE = host::__WASI_ERANGE,
+    EROFS = host::__WASI_EROFS,
+    ESPIPE = host::__WASI_ESPIPE,
+    ESRCH = host::__WASI_ESRCH,
+    ESTALE = host::__WASI_ESTALE,
+    ETIMEDOUT = host::__WASI_ETIMEDOUT,
+    ETXTBSY = host::__WASI_ETXTBSY,
+    EXDEV = host::__WASI_EXDEV,
+    ENOTCAPABLE = host::__WASI_ENOTCAPABLE,
 }
 
 impl WasiError {