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

$$ -*- mode: c++; -*-
$$ This is a Pump source file.  Please use Pump to convert it to
$$ gmock-generated-variadic-actions.h.
$$
$var n = 10  $$ The maximum arity we support.
// 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.
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// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// 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 {

// Implements ElementsAre() and ElementsAreArray().
template <typename Container>
class ElementsAreMatcherImpl : public MatcherInterface<Container> {
 public:
  typedef GMOCK_REMOVE_CONST_(GMOCK_REMOVE_REFERENCE_(Container)) RawContainer;
  typedef typename RawContainer::value_type Element;

  // Constructs the matcher from a sequence of element values or
  // element matchers.
  template <typename InputIter>
  ElementsAreMatcherImpl(InputIter first, size_t count) {
    matchers_.reserve(count);
    InputIter it = first;
    for (size_t i = 0; i != count; ++i, ++it) {
      matchers_.push_back(MatcherCast<const Element&>(*it));
    }
  }

  // Returns true iff 'container' matches.
  virtual bool Matches(Container container) const {
    if (container.size() != count())
      return false;

    typename RawContainer::const_iterator container_iter = container.begin();
    for (size_t i = 0; i != count();  ++container_iter, ++i) {
      if (!matchers_[i].Matches(*container_iter))
        return false;
    }

    return true;
  }

  // Describes what this matcher does.
  virtual void DescribeTo(::std::ostream* os) const {
    if (count() == 0) {
      *os << "is empty";
    } else if (count() == 1) {
      *os << "has 1 element that ";
      matchers_[0].DescribeTo(os);
    } else {
      *os << "has " << Elements(count()) << " where\n";
      for (size_t i = 0; i != count(); ++i) {
        *os << "element " << i << " ";
        matchers_[i].DescribeTo(os);
        if (i + 1 < count()) {
          *os << ",\n";
        }
      }
    }
  }

  // Describes what the negation of this matcher does.
  virtual void DescribeNegationTo(::std::ostream* os) const {
    if (count() == 0) {
      *os << "is not empty";
      return;
    }

    *os << "does not have " << Elements(count()) << ", or\n";
    for (size_t i = 0; i != count(); ++i) {
      *os << "element " << i << " ";
      matchers_[i].DescribeNegationTo(os);
      if (i + 1 < count()) {
        *os << ", or\n";
      }
    }
  }

  // Explains why 'container' matches, or doesn't match, this matcher.
  virtual void ExplainMatchResultTo(Container container,
                                    ::std::ostream* os) const {
    if (Matches(container)) {
      // We need to explain why *each* element matches (the obvious
      // ones can be skipped).

      bool reason_printed = false;
      typename RawContainer::const_iterator container_iter = container.begin();
      for (size_t i = 0; i != count(); ++container_iter, ++i) {
        ::std::stringstream ss;
        matchers_[i].ExplainMatchResultTo(*container_iter, &ss);

        const string s = ss.str();
        if (!s.empty()) {
          if (reason_printed) {
            *os << ",\n";
          }
          *os << "element " << i << " " << s;
          reason_printed = true;
        }
      }
    } else {
      // We need to explain why the container doesn't match.
      const size_t actual_count = container.size();
      if (actual_count != count()) {
        // The element count doesn't match.  If the container is
        // empty, there's no need to explain anything as Google Mock
        // already prints the empty container.  Otherwise we just need
        // to show how many elements there actually are.
        if (actual_count != 0) {
          *os << "has " << Elements(actual_count);
        }
        return;
      }

      // The container has the right size but at least one element
      // doesn't match expectation.  We need to find this element and
      // explain why it doesn't match.
      typename RawContainer::const_iterator container_iter = container.begin();
      for (size_t i = 0; i != count(); ++container_iter, ++i) {
        if (matchers_[i].Matches(*container_iter)) {
          continue;
        }

        *os << "element " << i << " doesn't match";

        ::std::stringstream ss;
        matchers_[i].ExplainMatchResultTo(*container_iter, &ss);
        const string s = ss.str();
        if (!s.empty()) {
          *os << " (" << s << ")";
        }
        return;
      }
    }
  }

 private:
  static Message Elements(size_t count) {
    return Message() << count << (count == 1 ? " element" : " elements");
  }

  size_t count() const { return matchers_.size(); }
  std::vector<Matcher<const Element&> > matchers_;
};

// Implements ElementsAre() of 0-10 arguments.

class ElementsAreMatcher0 {
 public:
  ElementsAreMatcher0() {}

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

    const Matcher<const Element&>* const matchers = NULL;
    return MakeMatcher(new ElementsAreMatcherImpl<Container>(matchers, 0));
  }
};


$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 RawContainer::value_type Element;

    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[[]]_;

]]
};


]]
// Implements ElementsAreArray().
template <typename T>
class ElementsAreArrayMatcher {
 public:
  ElementsAreArrayMatcher(const T* first, size_t count) :
      first_(first), count_(count) {}

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

    return MakeMatcher(new ElementsAreMatcherImpl<Container>(first_, count_));
  }

 private:
  const T* const first_;
  const size_t count_;
};

}  // namespace internal

// 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();
}

$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.

namespace testing {
namespace internal {

// Constants denoting interpolations in a matcher description string.
const int kTupleInterpolation = -1;    // "%(*)s"
const int kPercentInterpolation = -2;  // "%%"
const int kInvalidInterpolation = -3;  // "%" followed by invalid text

// Records the location and content of an interpolation.
struct Interpolation {
  Interpolation(const char* start, const char* end, int param)
      : start_pos(start), end_pos(end), param_index(param) {}

  // Points to the start of the interpolation (the '%' character).
  const char* start_pos;
  // Points to the first character after the interpolation.
  const char* end_pos;
  // 0-based index of the interpolated matcher parameter;
  // kTupleInterpolation for "%(*)s"; kPercentInterpolation for "%%".
  int param_index;
};

typedef ::std::vector<Interpolation> Interpolations;

// Parses a matcher description string and returns a vector of
// interpolations that appear in the string; generates non-fatal
// failures iff 'description' is an invalid matcher description.
// 'param_names' is a NULL-terminated array of parameter names in the
// order they appear in the MATCHER_P*() parameter list.
Interpolations ValidateMatcherDescription(
    const char* param_names[], const char* description);

// Returns the actual matcher description, given the matcher name,
// user-supplied description template string, interpolations in the
// string, and the printed values of the matcher parameters.
string FormatMatcherDescription(
    const char* matcher_name, const char* description,
    const Interpolations& interp, const Strings& param_values);

}  // namespace internal
}  // namespace testing

$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$j]]));\
        *gmock_os << ::testing::internal::FormatMatcherDescription(\
                     #name, description, gmock_interp_, gmock_printed_params);\
      }\$param_field_decls
      const ::testing::internal::Interpolations gmock_interp_;\
    };\
    template <typename arg_type>\
    operator ::testing::Matcher<arg_type>() const {\
      return ::testing::Matcher<arg_type>(\
          new gmock_Impl<arg_type>($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
    ::testing::internal::Interpolations gmock_interp_;\
  };\$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_