// Has `unused` parameters make sure ordering of used parameters is correct.
//
// The most-inner function will create a local (circumstantially, inside an
// `if`-block) to test returning locals.

var level1 := @( a, b, c ) {
  return struct{ fnA1 := @( d, e, f ) {
    return struct{ fnB1 := @( g, h, i ) {
      return struct{ fnC1 := @( j, unused k, l ) {
        var res := a + b + c + d + e + f + g + h + i + j;
        if ( res > 0 )
          var out_local := res * l;
          return out_local;
        endif
        return res;
      }, fnC2 := @( j, unused k, l ) {
        var res := a * b * c * d * e * f * g * h * i * j;
        if ( res > 0 )
          var out_local := res / l;
          return out_local;
        endif
        return res;
      }, fnC3 := @( j, unused k, l ) {
        var res := a - b - c - d - e - f - g - h - i - j;
        if ( res > 0 )
          var out_local := res + l;
          return out_local;
        endif
        return res;
      } };
    }, fnB2 := @( g, h, i ) {
      return struct{ fnC1 := @( j, unused k, l ) {
        var res := a * b + c + d + e + f + g + h + i + j;
        if ( res > 0 )
          var out_local := res * l;
          return out_local;
        endif
        return res;
      }, fnC2 := @( j, unused k, l ) {
        var res := a + b * c * d * e * f * g * h * i * j;
        if ( res > 0 )
          var out_local := res / l;
          return out_local;
        endif
        return res;
      }, fnC3 := @( j, unused k, l ) {
        var res := a - b * c - d - e - f - g - h - i - j;
        if ( res > 0 )
          var out_local := res + l;
          return out_local;
        endif
        return res;
      } };
    } };
  } };
};

// (a + b + c + d + e + f + g + h + i + j) * l since inner expression is >0
// (-7 + -6 + -1 + 4 + -4 + 17 + 9 + 3 + 15 + -10) * -7 = -140
print( level1( -7, -6, -1 ).fnA1.call( 4, -4, 17 ).fnB1.call( 9, 3, 15 ).fnC1.call( -10, -7, -7 ) );

// a * b + c + d + e + f + g + h + i + j
// -3 * -1 + 2 + -7 + -4 + -5 + -2 + 7 + 1 + -1 = -6
print( level1( -3, -1, 2 ).fnA1.call( -7, -4, -5 ).fnB2.call( -2, 7, 1 ).fnC1.call( -1, 1, 5 ) );

// a - b * c - d - e - f - g - h - i - j
// 10 - 2 * 11 - 10 - 2 - 4 - -8 - -1 - -5 - 10 = -24
print( level1( 10, 2, 11 ).fnA1.call( 10, 2, 4 ).fnB2.call( -8, -1, -5 ).fnC3.call( 10, -3, 1 ) );