290 lines
9.4 KiB
C++
290 lines
9.4 KiB
C++
/***************************************************************************
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*
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* find.cpp - test exercising 25.1.2 [lib.alg.find]
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*
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* $Id: 25.find.cpp 510970 2007-02-23 14:57:45Z faridz $
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*
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***************************************************************************
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*
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* Copyright 2000-2006 Rogue Wave Software.
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*
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**************************************************************************/
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#include <algorithm> // for find()
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#include <cstring> // for size_t, strlen()
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#include <alg_test.h>
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#include <rw_value.h> // for UserClass
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#include <driver.h> // for rw_test()
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/**************************************************************************/
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_RWSTD_NAMESPACE (std) {
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#ifndef _RWSTD_NO_EXPLICIT_INSTANTIATION
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template
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InputIter<eq_comp<base<> > >
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find (InputIter<eq_comp<base<> > >, InputIter<eq_comp<base<> > >,
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const eq_comp<base<> >&);
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template
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InputIter<eq_comp<base<> > >
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find_if (InputIter<eq_comp<base<> > >, InputIter<eq_comp<base<> > >,
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predicate<eq_comp<base<> > >);
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#endif // _RWSTD_NO_EXPLICIT_INSTANTIATION
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} // namespace std
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/**************************************************************************/
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template <class T>
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struct Predicate
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{
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static std::size_t funcalls_;
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Predicate (const T &val, int /* dummy */)
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: val_ (val) {
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funcalls_ = 0;
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}
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class ConvertibleToBool {
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bool result_;
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public:
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ConvertibleToBool (bool res): result_ (res) { /* empty */ }
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operator bool() const { return result_; }
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};
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// return a type other than bool but one that is implicitly
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// convertible to bool to detect incorrect assumptions
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ConvertibleToBool operator() (T obj) /* not const */ {
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++funcalls_;
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return ConvertibleToBool (obj == val_);
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}
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private:
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void operator= (Predicate&);
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const T &val_;
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};
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template <class T>
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std::size_t Predicate<T>::funcalls_;
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/**************************************************************************/
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template <class InputIterator>
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void test_find (int line, // line number of test case
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const char *src, // source sequence
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std::size_t findoff, // offset of the element to find
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InputIterator dummy_iter,
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bool test_pred)
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{
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static const char* const itname = type_name (dummy_iter, (UserClass*)0);
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static const char* const pname = test_pred ? "Predicate" : "operator==";
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const std::size_t nsrc = std::strlen (src);
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// normalize offset
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if (nsrc < findoff)
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findoff = nsrc;
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// create always at least 1 element (used to test failed searches)
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UserClass* const tsrc = UserClass::from_char (src, nsrc + 1);
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UserClass* const src_begin = tsrc;
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UserClass* const src_end = tsrc + nsrc;
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// current [first, last)
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const InputIterator first (src_begin, src_begin, src_end);
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const InputIterator last (src_end, src_begin, src_end);
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// get a reference to the object to find (when findoff == nsrc
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// the sought for element is outside the source range and won't
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// be found)
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const UserClass &to_find = tsrc [findoff];
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// construct a predicate object to use with find_if
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const Predicate<UserClass> pred (to_find, 0 /* dummy */);
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// reset the operator==() counter
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UserClass::n_total_op_eq_ = 0;
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// invoke find() or find_if(), depending on the predicate flag
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const InputIterator res = test_pred ?
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std::find_if (first, last, pred) : std::find (first, last, to_find);
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// silence a bogus EDG eccp remark #550-D:
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// variable "res" was set but never used
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_RWSTD_UNUSED (res);
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// verify 25.1.5 p2
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if (!rw_assert (res.cur_ == first.cur_ + findoff, 0, line,
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"line %d: find%{?}_if%{;} (%s = \"%s\", ..., '%c')"
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" == (it + %zu), got (it + %td)",
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__LINE__, test_pred, itname, src, to_find.data_.val_,
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findoff, res.cur_ - first.cur_)) {
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delete[] tsrc;
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return;
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}
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// verify 25.1.5 p3
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// Complexity: At most last - first applications
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// of the corresponding predicate.
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// The complexity when find is successful is actually
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// (res - first) applications of the corresponding predicate.
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const std::size_t npreds =
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test_pred ? pred.funcalls_ : UserClass::n_total_op_eq_;
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rw_assert (npreds <= findoff + 1, 0, line,
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"line %d: find%{?}_if%{;} (%s = \"%s\", ..., '%c') "
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"invoked %s %zu times, expected no more than %zu",
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__LINE__, test_pred, itname, src, to_find.data_.val_,
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pname, npreds, findoff + 1);
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delete[] tsrc;
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}
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/**************************************************************************/
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template <class InputIterator>
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void test_find (InputIterator dummy_iter, bool test_pred)
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{
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static const char* const itname = type_name (dummy_iter, (UserClass*)0);
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rw_info (0, 0, 0, "std::find%{?}_if%{;} (%s, %2$s, "
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"%{?}Predicate%{:}const UserClass&%{;})",
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test_pred, itname, test_pred);
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#define TEST(src, off_find) \
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test_find (__LINE__, src, std::size_t (off_find), \
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dummy_iter, test_pred)
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// +------------------ subject sequence
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// | +--- offset of the value to find (-1 for none)
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// | | also the offset of the returned iterator
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// | |
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// | |
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// v v
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TEST ("", -1);
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TEST ("a", 0);
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TEST ("aa", 0);
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TEST ("ab", 1);
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TEST ("aaa", 0);
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TEST ("abb", 1);
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TEST ("abc", 2);
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TEST ("abcc", 2);
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TEST ("abcd", 3);
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TEST ("abcde", 4);
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TEST ("abcdef", 5);
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TEST ("abcdefg", 6);
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TEST ("abcdefgh", 7);
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TEST ("abcdefghi", 8);
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TEST ("abcdefghij", 9);
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TEST ("abcdefghijk", 10);
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TEST ("abcdefghijk", -1);
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}
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/**************************************************************************/
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/* extern */ int rw_opt_no_input_iter; // --no-InputIterator
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/* extern */ int rw_opt_no_fwd_iter; // --no-ForwardIterator
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/* extern */ int rw_opt_no_bidir_iter; // --no-BidirectionalIterator
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/* extern */ int rw_opt_no_rnd_iter; // --no-RandomAccessIterator
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/* extern */ int rw_opt_no_predicate; // --no-Predicate
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static void
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test_find (bool test_pred)
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{
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rw_info (0, 0, 0,
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"template <class %s, class %s> "
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"%1$s std::find%{?}_if%{;} (%1$s, %1$s, "
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"%{?}%2$s%{:}const %2$s&%{;})",
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"InputIterator", test_pred ? "Predicate" : "T",
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test_pred);
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if (rw_opt_no_input_iter) {
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rw_note (0, __FILE__, __LINE__, "InputIterator test disabled");
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}
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else {
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test_find (InputIter<UserClass>(0, 0, 0), test_pred);
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}
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if (rw_opt_no_fwd_iter) {
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rw_note (0, __FILE__, __LINE__, "ForwardIterator test disabled");
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}
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else {
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test_find (ConstFwdIter<UserClass>(), test_pred);
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test_find (FwdIter<UserClass>(), test_pred);
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}
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if (rw_opt_no_bidir_iter) {
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rw_note (0, __FILE__, __LINE__, "BidirectionalIterator test disabled");
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}
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else {
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test_find (ConstBidirIter<UserClass>(), test_pred);
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test_find (BidirIter<UserClass>(), test_pred);
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}
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if (rw_opt_no_rnd_iter) {
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rw_note (0, __FILE__, __LINE__, "RandomAccessIterator test disabled");
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}
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else {
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test_find (ConstRandomAccessIter<UserClass>(), test_pred);
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test_find (RandomAccessIter<UserClass>(), test_pred);
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}
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}
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/**************************************************************************/
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static int
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run_test (int, char*[])
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{
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test_find (false);
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if (rw_opt_no_predicate) {
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rw_note (0, __FILE__, __LINE__, "Predicate test disabled");
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}
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else {
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test_find (true);
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}
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return 0;
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}
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/**************************************************************************/
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int main (int argc, char *argv[])
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{
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return rw_test (argc, argv, __FILE__,
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"lib.alg.find",
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0 /* no comment */, run_test,
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"|-no-InputIterator#"
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"|-no-ForwardIterator#"
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"|-no-BidirectionalIterator#"
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"|-no-RandomAccessIterator#"
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"|-no-Predicate#",
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&rw_opt_no_input_iter,
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&rw_opt_no_fwd_iter,
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&rw_opt_no_bidir_iter,
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&rw_opt_no_rnd_iter,
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&rw_opt_no_predicate);
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}
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