base/bind.h

   1 // This file was GENERATED by command:
   2 //     pump.py bind.h.pump
   3 // DO NOT EDIT BY HAND!!!
   4
   5
   6 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   7 // Use of this source code is governed by a BSD-style license that can be
   8 // found in the LICENSE file.
   9
  10 #ifndef BASE_BIND_H_
  11 #define BASE_BIND_H_
  12 #pragma once
  13
  14 #include "base/bind_internal.h"
  15 #include "base/callback_internal.h"
  16
  17 // See base/callback.h for how to use these functions.
  18 //
  19 // IMPLEMENTATION NOTE
  20 // Though Bind()'s result is meant to be stored in a Callback<> type, it
  21 // cannot actually return the exact type without requiring a large amount
  22 // of extra template specializations. The problem is that in order to
  23 // discern the correct specialization of Callback<>, Bind would need to
  24 // unwrap the function signature to determine the signature's arity, and
  25 // whether or not it is a method.
  26 //
  27 // Each unique combination of (arity, function_type, num_prebound) where
  28 // function_type is one of {function, method, const_method} would require
  29 // one specialization.  We eventually have to do a similar number of
  30 // specializations anyways in the implementation (see the FunctionTraitsN,
  31 // classes).  However, it is avoidable in Bind if we return the result
  32 // via an indirection like we do below.
  33
  34 namespace base {
  35
  36 template <typename Sig>
  37 internal::InvokerStorageHolder<internal::InvokerStorage0<Sig> >
  38 Bind(Sig f) {
  39   return internal::MakeInvokerStorageHolder(
  40       new internal::InvokerStorage0<Sig>(f));
  41 }
  42
  43 template <typename Sig, typename P1>
  44 internal::InvokerStorageHolder<internal::InvokerStorage1<Sig,P1> >
  45 Bind(Sig f, const P1& p1) {
  46   return internal::MakeInvokerStorageHolder(
  47       new internal::InvokerStorage1<Sig, P1>(
  48           f, p1));
  49 }
  50
  51 template <typename Sig, typename P1, typename P2>
  52 internal::InvokerStorageHolder<internal::InvokerStorage2<Sig,P1, P2> >
  53 Bind(Sig f, const P1& p1, const P2& p2) {
  54   return internal::MakeInvokerStorageHolder(
  55       new internal::InvokerStorage2<Sig, P1, P2>(
  56           f, p1, p2));
  57 }
  58
  59 template <typename Sig, typename P1, typename P2, typename P3>
  60 internal::InvokerStorageHolder<internal::InvokerStorage3<Sig,P1, P2, P3> >
  61 Bind(Sig f, const P1& p1, const P2& p2, const P3& p3) {
  62   return internal::MakeInvokerStorageHolder(
  63       new internal::InvokerStorage3<Sig, P1, P2, P3>(
  64           f, p1, p2, p3));
  65 }
  66
  67 template <typename Sig, typename P1, typename P2, typename P3, typename P4>
  68 internal::InvokerStorageHolder<internal::InvokerStorage4<Sig,P1, P2, P3, P4> >
  69 Bind(Sig f, const P1& p1, const P2& p2, const P3& p3, const P4& p4) {
  70   return internal::MakeInvokerStorageHolder(
  71       new internal::InvokerStorage4<Sig, P1, P2, P3, P4>(
  72           f, p1, p2, p3, p4));
  73 }
  74
  75 template <typename Sig, typename P1, typename P2, typename P3, typename P4,
  76     typename P5>
  77 internal::InvokerStorageHolder<internal::InvokerStorage5<Sig,P1, P2, P3, P4,
  78     P5> >
  79 Bind(Sig f, const P1& p1, const P2& p2, const P3& p3, const P4& p4,
  80     const P5& p5) {
  81   return internal::MakeInvokerStorageHolder(
  82       new internal::InvokerStorage5<Sig, P1, P2, P3, P4, P5>(
  83           f, p1, p2, p3, p4, p5));
  84 }
  85
  86 template <typename Sig, typename P1, typename P2, typename P3, typename P4,
  87     typename P5, typename P6>
  88 internal::InvokerStorageHolder<internal::InvokerStorage6<Sig,P1, P2, P3, P4,
  89     P5, P6> >
  90 Bind(Sig f, const P1& p1, const P2& p2, const P3& p3, const P4& p4,
  91     const P5& p5, const P6& p6) {
  92   return internal::MakeInvokerStorageHolder(
  93       new internal::InvokerStorage6<Sig, P1, P2, P3, P4, P5, P6>(
  94           f, p1, p2, p3, p4, p5, p6));
  95 }
  96
  97 }  // namespace base
  98
  99 #endif  // BASE_BIND_H_