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/* { dg-do compile } */

/* { dg-options "-O -Wall" } */

/* C99 6.5.2.3 Structure and union members.

   If the first expression has qualified type, the result has the so-qualified

   version of the type of the designated member.

   Based on the test from ../dfp/.  */

struct s {_Fract f; const long _Fract lf;};

struct sv { volatile _Fract f; volatile long _Fract lf; };

union u

{

  const long _Fract lf;

  _Fract f;

  const struct s cs;

};

struct s s;

struct sv sv;

const struct s cs;

union u u;

const union u cu;

struct s g (struct s s)

{

  return s;

}

union u h (union u u)

{

  return u;

}

void f()

{

  cs.f = 0.1r; /* { dg-error "assignment of read-only variable" } */

  cs.lf = 0.2lr; /* { dg-error "assignment of read-only variable" } */

  s.lf = 0.3lr;  /* { dg-error "assignment of read-only member" } */

  s.f = 0.4r;

  u.f = 0.5r;

  u.lf = 0.6lr;    /* { dg-error "assignment of read-only member" } */

  u.cs.f = 0.7r; /* { dg-error "assignment of read-only member" } */

  u.cs.lf = 0.8lr; /* { dg-error "assignment of read-only member" } */

  cu.f = 0.9r;   /* { dg-error "assignment of read-only variable" } */

  cu.lf = 0.01lr;    /* { dg-error "assignment of read-only variable" } */

  cu.cs.f = 0.02r; /* { dg-error "assignment of read-only variable" } */

  cu.cs.lf = 0.03lr; /* { dg-error "assignment of read-only variable" } */

  /* f().x is a valid postfix expression but is not an lvalue if

     function f() returning a structure or union.  */

  g(s).f = 0.04r;  /* { dg-error "lvalue required" } */

  h(u).lf = 0.05lr;  /* { dg-error "lvalue required" } */

  /* Test assignment to volatile structure members.  */

  sv.f = 0.06r;

  sv.lf = 0.07lr;

}