Tuple member access

[pabuhr]

int main() {
    double d;  float f;
    [ int, float, double ] f() {};
    [ double, float ] x = f().[ 2, 1 ]; // works
    x = f().[ 2, 1 ]; // works
    [ d, f ] = f().[ 2, 1 ]; // fails
}
CFA Version 1.0.0 (debug)
error: No reasonable alternatives for expression Generated Cast of:
  Tuple Index Expression, with tuple:
    Unique Expression with id:2
      Application of
        Variable Expression: f: function
        ... returning
          _retval_f: tuple of types
            signed int
            float
            double
 with initializer (not constructed)
            Compound initializer: 


          ... with attributes:
            Attribute with name: unused


    with index: 1

... to:
  pointer to function
  ... returning
    _retval_f: tuple of types
      signed int
      float
      double
 with initializer (not constructed)
      Compound initializer: 


    ... with attributes:
      Attribute with name: unused