hphp/hack/test/typecheck/unmagic_stringish/unmagic_stringish2.php

   1 <?hh // strict
   2
   3 class CNonStringish {}
   4
   5 class CExplicit implements StringishObject{
   6   public function __toString(): string {
   7     return __CLASS__;
   8   }
   9 }
  10
  11 class CImplicit {
  12   public function __toString(): string {
  13     return __CLASS__;
  14   }
  15 }
  16
  17 interface IImplicit {
  18   public function __toString(): string;
  19 }
  20
  21 class CImplicitIntf implements IImplicit {
  22   public function __toString(): string {
  23     return __CLASS__;
  24   }
  25 }
  26
  27 trait TStringish {
  28   public function __toString(): string {
  29     return __TRAIT__;
  30   }
  31
  32   private function foo(): string {
  33     return (string) $this;
  34   }
  35 }
  36
  37 class CImplicitTuse {
  38   use TStringish;
  39 }
  40
  41 trait TReq {
  42   require implements StringishObject;
  43
  44   private function foo(): string {
  45     return (string) $this;
  46   }
  47 }
  48
  49 class CImplicitTreq {
  50   use TReq;
  51
  52   public function __toString(): string {
  53     return __CLASS__;
  54   }
  55 }
  56
  57 function test(): void {
  58   $cnon = new CNonStringish();
  59
  60   $cexp = new CExplicit();
  61   $cimp = new CImplicit();
  62   $cimpintf = new CImplicitIntf();
  63   $cimptuse = new CImplicitTuse();
  64   $cimptreq = new CImplicitTreq();
  65
  66   "$cnon";
  67   ''.$cnon;
  68
  69   "$cexp";
  70   ''.$cexp;
  71
  72   "$cimp";
  73   ''.$cimp;
  74
  75   "$cimpintf";
  76   ''.$cimpintf;
  77
  78   "$cimptuse";
  79   ''.$cimptuse;
  80
  81   "$cimptreq";
  82   ''.$cimptreq;
  83 }