googletest/include/gmock/gmock-generated-matchers.h.pump

$$ -*- mode: c++; -*-
$$ This is a Pump source file.  Please use Pump to convert it to
$$ gmock-generated-actions.h.
$$
$var n = 10  $$ The maximum arity we support.
$$ }} This line fixes auto-indentation of the following code in Emacs.
// Copyright 2008, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// Google Mock - a framework for writing C++ mock classes.
//
// This file implements some commonly used variadic matchers.

#ifndef GMOCK_INCLUDE_GMOCK_GMOCK_GENERATED_MATCHERS_H_
#define GMOCK_INCLUDE_GMOCK_GMOCK_GENERATED_MATCHERS_H_

#include <sstream>
#include <string>
#include <vector>
#include <gmock/gmock-matchers.h>
#include <gmock/gmock-printers.h>

namespace testing {
namespace internal {

$range i 0..n-1

// The type of the i-th (0-based) field of Tuple.
#define GMOCK_FIELD_TYPE_(Tuple, i) \
    typename ::std::tr1::tuple_element<i, Tuple>::type

// TupleFields<Tuple, k0, ..., kn> is for selecting fields from a
// tuple of type Tuple.  It has two members:
//
//   type: a tuple type whose i-th field is the ki-th field of Tuple.
//   GetSelectedFields(t): returns fields k0, ..., and kn of t as a tuple.
//
// For example, in class TupleFields<tuple<bool, char, int>, 2, 0>, we have:
//
//   type is tuple<int, bool>, and
//   GetSelectedFields(make_tuple(true, 'a', 42)) is (42, true).

template <class Tuple$for i [[, int k$i = -1]]>
class TupleFields;

// This generic version is used when there are $n selectors.
template <class Tuple$for i [[, int k$i]]>
class TupleFields {
 public:
  typedef ::std::tr1::tuple<$for i, [[GMOCK_FIELD_TYPE_(Tuple, k$i)]]> type;
  static type GetSelectedFields(const Tuple& t) {
    using ::std::tr1::get;
    return type($for i, [[get<k$i>(t)]]);
  }
};

// The following specialization is used for 0 ~ $(n-1) selectors.

$for i [[
$$ }}}
$range j 0..i-1
$range k 0..n-1

template <class Tuple$for j [[, int k$j]]>
class TupleFields<Tuple, $for k, [[$if k < i [[k$k]] $else [[-1]]]]> {
 public:
  typedef ::std::tr1::tuple<$for j, [[GMOCK_FIELD_TYPE_(Tuple, k$j)]]> type;
  static type GetSelectedFields(const Tuple& $if i==0 [[/* t */]] $else [[t]]) {
    using ::std::tr1::get;
    return type($for j, [[get<k$j>(t)]]);
  }
};

]]

#undef GMOCK_FIELD_TYPE_

// Implements the Args() matcher.

$var ks = [[$for i, [[k$i]]]]
template <class ArgsTuple$for i [[, int k$i = -1]]>
class ArgsMatcherImpl : public MatcherInterface<ArgsTuple> {
 public:
  // ArgsTuple may have top-level const or reference modifiers.
  typedef GMOCK_REMOVE_CONST_(GMOCK_REMOVE_REFERENCE_(ArgsTuple)) RawArgsTuple;
  typedef typename internal::TupleFields<RawArgsTuple, $ks>::type SelectedArgs;
  typedef Matcher<const SelectedArgs&> MonomorphicInnerMatcher;

  template <typename InnerMatcher>
  explicit ArgsMatcherImpl(const InnerMatcher& inner_matcher)
      : inner_matcher_(SafeMatcherCast<const SelectedArgs&>(inner_matcher)) {}

  virtual bool Matches(ArgsTuple args) const {
    return inner_matcher_.Matches(GetSelectedArgs(args));
  }

  virtual void DescribeTo(::std::ostream* os) const {
    PrintIndices(os);
    inner_matcher_.DescribeTo(os);
  }

  virtual void DescribeNegationTo(::std::ostream* os) const {
    PrintIndices(os);
    inner_matcher_.DescribeNegationTo(os);
  }

  virtual void ExplainMatchResultTo(ArgsTuple args,
                                    ::std::ostream* os) const {
    inner_matcher_.ExplainMatchResultTo(GetSelectedArgs(args), os);
  }

 private:
  static SelectedArgs GetSelectedArgs(ArgsTuple args) {
    return TupleFields<RawArgsTuple, $ks>::GetSelectedFields(args);
  }

  // Prints the indices of the selected fields.
  static void PrintIndices(::std::ostream* os) {
    *os << "are a tuple whose fields (";
    const int indices[$n] = { $ks };
    for (int i = 0; i < $n; i++) {
      if (indices[i] < 0)
        break;

      if (i >= 1)
        *os << ", ";

      *os << "#" << indices[i];
    }
    *os << ") ";
  }

  const MonomorphicInnerMatcher inner_matcher_;

  GTEST_DISALLOW_ASSIGN_(ArgsMatcherImpl);
};

template <class InnerMatcher$for i [[, int k$i = -1]]>
class ArgsMatcher {
 public:
  explicit ArgsMatcher(const InnerMatcher& inner_matcher)
      : inner_matcher_(inner_matcher) {}

  template <typename ArgsTuple>
  operator Matcher<ArgsTuple>() const {
    return MakeMatcher(new ArgsMatcherImpl<ArgsTuple, $ks>(inner_matcher_));
  }

 private:
  const InnerMatcher inner_matcher_;

  GTEST_DISALLOW_ASSIGN_(ArgsMatcher);
};

// Implements ElementsAre() of 1-$n arguments.


$range i 1..n
$for i [[
$range j 1..i
template <$for j, [[typename T$j]]>
class ElementsAreMatcher$i {
 public:
  $if i==1 [[explicit ]]ElementsAreMatcher$i($for j, [[const T$j& e$j]])$if i > 0 [[ : ]]
      $for j, [[e$j[[]]_(e$j)]] {}

  template <typename Container>
  operator Matcher<Container>() const {
    typedef GMOCK_REMOVE_CONST_(GMOCK_REMOVE_REFERENCE_(Container))
        RawContainer;
    typedef typename internal::StlContainerView<RawContainer>::type::value_type
        Element;

$if i==1 [[

    // Nokia's Symbian Compiler has a nasty bug where the object put
    // in a one-element local array is not destructed when the array
    // goes out of scope.  This leads to obvious badness as we've
    // added the linked_ptr in it to our other linked_ptrs list.
    // Hence we implement ElementsAreMatcher1 specially to avoid using
    // a local array.
    const Matcher<const Element&> matcher =
        MatcherCast<const Element&>(e1_);
    return MakeMatcher(new ElementsAreMatcherImpl<Container>(&matcher, 1));
]] $else [[

    const Matcher<const Element&> matchers[] = {

$for j [[
      MatcherCast<const Element&>(e$j[[]]_),

]]
    };

    return MakeMatcher(new ElementsAreMatcherImpl<Container>(matchers, $i));
]]

  }

 private:

$for j [[
  const T$j& e$j[[]]_;

]]

  GTEST_DISALLOW_ASSIGN_(ElementsAreMatcher$i);
};


]]
}  // namespace internal

// Args<N1, N2, ..., Nk>(a_matcher) matches a tuple if the selected
// fields of it matches a_matcher.  C++ doesn't support default
// arguments for function templates, so we have to overload it.

$range i 0..n
$for i [[
$range j 1..i
template <$for j [[int k$j, ]]typename InnerMatcher>
inline internal::ArgsMatcher<InnerMatcher$for j [[, k$j]]>
Args(const InnerMatcher& matcher) {
  return internal::ArgsMatcher<InnerMatcher$for j [[, k$j]]>(matcher);
}


]]
// ElementsAre(e0, e1, ..., e_n) matches an STL-style container with
// (n + 1) elements, where the i-th element in the container must
// match the i-th argument in the list.  Each argument of
// ElementsAre() can be either a value or a matcher.  We support up to
// $n arguments.
//
// NOTE: Since ElementsAre() cares about the order of the elements, it
// must not be used with containers whose elements's order is
// undefined (e.g. hash_map).

inline internal::ElementsAreMatcher0 ElementsAre() {
  return internal::ElementsAreMatcher0();
}

$range i 1..n
$for i [[
$range j 1..i

template <$for j, [[typename T$j]]>
inline internal::ElementsAreMatcher$i<$for j, [[T$j]]> ElementsAre($for j, [[const T$j& e$j]]) {
  return internal::ElementsAreMatcher$i<$for j, [[T$j]]>($for j, [[e$j]]);
}

]]

// ElementsAreArray(array) and ElementAreArray(array, count) are like
// ElementsAre(), except that they take an array of values or
// matchers.  The former form infers the size of 'array', which must
// be a static C-style array.  In the latter form, 'array' can either
// be a static array or a pointer to a dynamically created array.

template <typename T>
inline internal::ElementsAreArrayMatcher<T> ElementsAreArray(
    const T* first, size_t count) {
  return internal::ElementsAreArrayMatcher<T>(first, count);
}

template <typename T, size_t N>
inline internal::ElementsAreArrayMatcher<T>
ElementsAreArray(const T (&array)[N]) {
  return internal::ElementsAreArrayMatcher<T>(array, N);
}

}  // namespace testing
$$ } // This Pump meta comment fixes auto-indentation in Emacs. It will not
$$   // show up in the generated code.


// The MATCHER* family of macros can be used in a namespace scope to
// define custom matchers easily.  The syntax:
//
//   MATCHER(name, description_string) { statements; }
//
// will define a matcher with the given name that executes the
// statements, which must return a bool to indicate if the match
// succeeds.  Inside the statements, you can refer to the value being
// matched by 'arg', and refer to its type by 'arg_type'.
//
// The description string documents what the matcher does, and is used
// to generate the failure message when the match fails.  Since a
// MATCHER() is usually defined in a header file shared by multiple
// C++ source files, we require the description to be a C-string
// literal to avoid possible side effects.  It can be empty, in which
// case we'll use the sequence of words in the matcher name as the
// description.
//
// For example:
//
//   MATCHER(IsEven, "") { return (arg % 2) == 0; }
//
// allows you to write
//
//   // Expects mock_foo.Bar(n) to be called where n is even.
//   EXPECT_CALL(mock_foo, Bar(IsEven()));
//
// or,
//
//   // Verifies that the value of some_expression is even.
//   EXPECT_THAT(some_expression, IsEven());
//
// If the above assertion fails, it will print something like:
//
//   Value of: some_expression
//   Expected: is even
//     Actual: 7
//
// where the description "is even" is automatically calculated from the
// matcher name IsEven.
//
// Note that the type of the value being matched (arg_type) is
// determined by the context in which you use the matcher and is
// supplied to you by the compiler, so you don't need to worry about
// declaring it (nor can you).  This allows the matcher to be
// polymorphic.  For example, IsEven() can be used to match any type
// where the value of "(arg % 2) == 0" can be implicitly converted to
// a bool.  In the "Bar(IsEven())" example above, if method Bar()
// takes an int, 'arg_type' will be int; if it takes an unsigned long,
// 'arg_type' will be unsigned long; and so on.
//
// Sometimes you'll want to parameterize the matcher.  For that you
// can use another macro:
//
//   MATCHER_P(name, param_name, description_string) { statements; }
//
// For example:
//
//   MATCHER_P(HasAbsoluteValue, value, "") { return abs(arg) == value; }
//
// will allow you to write:
//
//   EXPECT_THAT(Blah("a"), HasAbsoluteValue(n));
//
// which may lead to this message (assuming n is 10):
//
//   Value of: Blah("a")
//   Expected: has absolute value 10
//     Actual: -9
//
// Note that both the matcher description and its parameter are
// printed, making the message human-friendly.
//
// In the matcher definition body, you can write 'foo_type' to
// reference the type of a parameter named 'foo'.  For example, in the
// body of MATCHER_P(HasAbsoluteValue, value) above, you can write
// 'value_type' to refer to the type of 'value'.
//
// We also provide MATCHER_P2, MATCHER_P3, ..., up to MATCHER_P$n to
// support multi-parameter matchers.
//
// When defining a parameterized matcher, you can use Python-style
// interpolations in the description string to refer to the parameter
// values.  We support the following syntax currently:
//
//   %%       a single '%' character
//   %(*)s    all parameters of the matcher printed as a tuple
//   %(foo)s  value of the matcher parameter named 'foo'
//
// For example,
//
//   MATCHER_P2(InClosedRange, low, hi, "is in range [%(low)s, %(hi)s]") {
//     return low <= arg && arg <= hi;
//   }
//   ...
//   EXPECT_THAT(3, InClosedRange(4, 6));
//
// would generate a failure that contains the message:
//
//   Expected: is in range [4, 6]
//
// If you specify "" as the description, the failure message will
// contain the sequence of words in the matcher name followed by the
// parameter values printed as a tuple.  For example,
//
//   MATCHER_P2(InClosedRange, low, hi, "") { ... }
//   ...
//   EXPECT_THAT(3, InClosedRange(4, 6));
//
// would generate a failure that contains the text:
//
//   Expected: in closed range (4, 6)
//
// For the purpose of typing, you can view
//
//   MATCHER_Pk(Foo, p1, ..., pk, description_string) { ... }
//
// as shorthand for
//
//   template <typename p1_type, ..., typename pk_type>
//   FooMatcherPk<p1_type, ..., pk_type>
//   Foo(p1_type p1, ..., pk_type pk) { ... }
//
// When you write Foo(v1, ..., vk), the compiler infers the types of
// the parameters v1, ..., and vk for you.  If you are not happy with
// the result of the type inference, you can specify the types by
// explicitly instantiating the template, as in Foo<long, bool>(5,
// false).  As said earlier, you don't get to (or need to) specify
// 'arg_type' as that's determined by the context in which the matcher
// is used.  You can assign the result of expression Foo(p1, ..., pk)
// to a variable of type FooMatcherPk<p1_type, ..., pk_type>.  This
// can be useful when composing matchers.
//
// While you can instantiate a matcher template with reference types,
// passing the parameters by pointer usually makes your code more
// readable.  If, however, you still want to pass a parameter by
// reference, be aware that in the failure message generated by the
// matcher you will see the value of the referenced object but not its
// address.
//
// You can overload matchers with different numbers of parameters:
//
//   MATCHER_P(Blah, a, description_string1) { ... }
//   MATCHER_P2(Blah, a, b, description_string2) { ... }
//
// While it's tempting to always use the MATCHER* macros when defining
// a new matcher, you should also consider implementing
// MatcherInterface or using MakePolymorphicMatcher() instead,
// especially if you need to use the matcher a lot.  While these
// approaches require more work, they give you more control on the
// types of the value being matched and the matcher parameters, which
// in general leads to better compiler error messages that pay off in
// the long run.  They also allow overloading matchers based on
// parameter types (as opposed to just based on the number of
// parameters).
//
// CAVEAT:
//
// MATCHER*() can only be used in a namespace scope.  The reason is
// that C++ doesn't yet allow function-local types to be used to
// instantiate templates.  The up-coming C++0x standard will fix this.
// Once that's done, we'll consider supporting using MATCHER*() inside
// a function.
//
// MORE INFORMATION:
//
// To learn more about using these macros, please search for 'MATCHER'
// on http://code.google.com/p/googlemock/wiki/CookBook.

$range i 0..n
$for i

[[
$var macro_name = [[$if i==0 [[MATCHER]] $elif i==1 [[MATCHER_P]]
                                         $else [[MATCHER_P$i]]]]
$var class_name = [[name##Matcher[[$if i==0 [[]] $elif i==1 [[P]]
                                                 $else [[P$i]]]]]]
$range j 0..i-1
$var template = [[$if i==0 [[]] $else [[

  template <$for j, [[typename p$j##_type]]>\
]]]]
$var ctor_param_list = [[$for j, [[p$j##_type gmock_p$j]]]]
$var impl_ctor_param_list = [[$for j [[p$j##_type gmock_p$j, ]]
const ::testing::internal::Interpolations& gmock_interp]]
$var impl_inits = [[ : $for j [[p$j(gmock_p$j), ]]gmock_interp_(gmock_interp)]]
$var inits = [[$if i==0 [[]] $else [[ : $for j, [[p$j(gmock_p$j)]]]]]]
$var params_and_interp = [[$for j [[p$j, ]]gmock_interp_]]
$var params = [[$for j, [[p$j]]]]
$var param_types = [[$if i==0 [[]] $else [[<$for j, [[p$j##_type]]>]]]]
$var param_types_and_names = [[$for j, [[p$j##_type p$j]]]]
$var param_field_decls = [[$for j
[[

      p$j##_type p$j;\
]]]]
$var param_field_decls2 = [[$for j
[[

    p$j##_type p$j;\
]]]]

#define $macro_name(name$for j [[, p$j]], description)\$template
  class $class_name {\
   public:\
    template <typename arg_type>\
    class gmock_Impl : public ::testing::MatcherInterface<arg_type> {\
     public:\
      [[$if i==1 [[explicit ]]]]gmock_Impl($impl_ctor_param_list)\
          $impl_inits {}\
      virtual bool Matches(arg_type arg) const;\
      virtual void DescribeTo(::std::ostream* gmock_os) const {\
        const ::testing::internal::Strings& gmock_printed_params = \
            ::testing::internal::UniversalTersePrintTupleFieldsToStrings(\
                ::std::tr1::tuple<$for j, [[p$j##_type]]>($for j, [[p$j]]));\
        *gmock_os << ::testing::internal::FormatMatcherDescription(\
                     #name, description, gmock_interp_, gmock_printed_params);\
      }\$param_field_decls
      const ::testing::internal::Interpolations gmock_interp_;\
     private:\
      GTEST_DISALLOW_ASSIGN_(gmock_Impl);\
    };\
    template <typename arg_type>\
    operator ::testing::Matcher<arg_type>() const {\
      return ::testing::Matcher<arg_type>(\
          new gmock_Impl<arg_type>($params_and_interp));\
    }\
    $class_name($ctor_param_list)$inits {\
      const char* gmock_param_names[] = { $for j [[#p$j, ]]NULL };\
      gmock_interp_ = ::testing::internal::ValidateMatcherDescription(\
          gmock_param_names, ("" description ""));\
    }\$param_field_decls2
   private:\
    ::testing::internal::Interpolations gmock_interp_;\
    GTEST_DISALLOW_ASSIGN_($class_name);\
  };\$template
  inline $class_name$param_types name($param_types_and_names) {\
    return $class_name$param_types($params);\
  }\$template
  template <typename arg_type>\
  bool $class_name$param_types::\
      gmock_Impl<arg_type>::Matches(arg_type arg) const
]]


#endif  // GMOCK_INCLUDE_GMOCK_GMOCK_GENERATED_MATCHERS_H_