149 lines
5.5 KiB
C++
149 lines
5.5 KiB
C++
// bind_tests_simple.cpp -- The Boost Lambda Library ------------------
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//
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// Copyright (C) 2000-2003 Jaakko Jarvi (jaakko.jarvi@cs.utu.fi)
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// Copyright (C) 2000-2003 Gary Powell (powellg@amazon.com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// For more information, see www.boost.org
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// -----------------------------------------------------------------------
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#include <boost/test/minimal.hpp> // see "Header Implementation Option"
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#include "boost/lambda/bind.hpp"
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#include <iostream>
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using namespace boost::lambda;
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int sum_of_args_0() { return 0; }
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int sum_of_args_1(int a) { return a; }
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int sum_of_args_2(int a, int b) { return a+b; }
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int sum_of_args_3(int a, int b, int c) { return a+b+c; }
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int sum_of_args_4(int a, int b, int c, int d) { return a+b+c+d; }
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int sum_of_args_5(int a, int b, int c, int d, int e) { return a+b+c+d+e; }
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int sum_of_args_6(int a, int b, int c, int d, int e, int f) { return a+b+c+d+e+f; }
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int sum_of_args_7(int a, int b, int c, int d, int e, int f, int g) { return a+b+c+d+e+f+g; }
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int sum_of_args_8(int a, int b, int c, int d, int e, int f, int g, int h) { return a+b+c+d+e+f+g+h; }
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int sum_of_args_9(int a, int b, int c, int d, int e, int f, int g, int h, int i) { return a+b+c+d+e+f+g+h+i; }
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// ----------------------------
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class A {
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int i;
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public:
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A(int n) : i(n) {};
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int add(const int& j) { return i + j; }
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};
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void test_member_functions()
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{
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using boost::ref;
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A a(10);
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int i = 1;
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BOOST_CHECK(bind(&A::add, ref(a), _1)(i) == 11);
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BOOST_CHECK(bind(&A::add, &a, _1)(i) == 11);
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BOOST_CHECK(bind(&A::add, _1, 1)(a) == 11);
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BOOST_CHECK(bind(&A::add, _1, 1)(make_const(&a)) == 11);
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// This should fail, as lambda functors store arguments as const
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// bind(&A::add, a, _1);
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}
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int test_main(int, char *[]) {
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int i = 1; int j = 2; int k = 3;
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int result;
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// bind all parameters
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BOOST_CHECK(bind(sum_of_args_0)()==0);
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BOOST_CHECK(bind(sum_of_args_1, 1)()==1);
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BOOST_CHECK(bind(sum_of_args_2, 1, 2)()==3);
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BOOST_CHECK(bind(sum_of_args_3, 1, 2, 3)()==6);
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BOOST_CHECK(bind(sum_of_args_4, 1, 2, 3, 4)()==10);
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BOOST_CHECK(bind(sum_of_args_5, 1, 2, 3, 4, 5)()==15);
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BOOST_CHECK(bind(sum_of_args_6, 1, 2, 3, 4, 5, 6)()==21);
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BOOST_CHECK(bind(sum_of_args_7, 1, 2, 3, 4, 5, 6, 7)()==28);
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BOOST_CHECK(bind(sum_of_args_8, 1, 2, 3, 4, 5, 6, 7, 8)()==36);
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BOOST_CHECK(bind(sum_of_args_9, 1, 2, 3, 4, 5, 6, 7, 8, 9)()==45);
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// first parameter open
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BOOST_CHECK(bind(sum_of_args_0)()==0);
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BOOST_CHECK(bind(sum_of_args_1, _1)(i)==1);
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BOOST_CHECK(bind(sum_of_args_2, _1, 2)(i)==3);
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BOOST_CHECK(bind(sum_of_args_3, _1, 2, 3)(i)==6);
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BOOST_CHECK(bind(sum_of_args_4, _1, 2, 3, 4)(i)==10);
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BOOST_CHECK(bind(sum_of_args_5, _1, 2, 3, 4, 5)(i)==15);
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BOOST_CHECK(bind(sum_of_args_6, _1, 2, 3, 4, 5, 6)(i)==21);
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BOOST_CHECK(bind(sum_of_args_7, _1, 2, 3, 4, 5, 6, 7)(i)==28);
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BOOST_CHECK(bind(sum_of_args_8, _1, 2, 3, 4, 5, 6, 7, 8)(i)==36);
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BOOST_CHECK(bind(sum_of_args_9, _1, 2, 3, 4, 5, 6, 7, 8, 9)(i)==45);
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// two open arguments
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BOOST_CHECK(bind(sum_of_args_0)()==0);
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BOOST_CHECK(bind(sum_of_args_1, _1)(i)==1);
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BOOST_CHECK(bind(sum_of_args_2, _1, _2)(i, j)==3);
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BOOST_CHECK(bind(sum_of_args_3, _1, _2, 3)(i, j)==6);
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BOOST_CHECK(bind(sum_of_args_4, _1, _2, 3, 4)(i, j)==10);
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BOOST_CHECK(bind(sum_of_args_5, _1, _2, 3, 4, 5)(i, j)==15);
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BOOST_CHECK(bind(sum_of_args_6, _1, _2, 3, 4, 5, 6)(i, j)==21);
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BOOST_CHECK(bind(sum_of_args_7, _1, _2, 3, 4, 5, 6, 7)(i, j)==28);
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BOOST_CHECK(bind(sum_of_args_8, _1, _2, 3, 4, 5, 6, 7, 8)(i, j)==36);
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BOOST_CHECK(bind(sum_of_args_9, _1, _2, 3, 4, 5, 6, 7, 8, 9)(i, j)==45);
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// three open arguments
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BOOST_CHECK(bind(sum_of_args_0)()==0);
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BOOST_CHECK(bind(sum_of_args_1, _1)(i)==1);
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BOOST_CHECK(bind(sum_of_args_2, _1, _2)(i, j)==3);
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BOOST_CHECK(bind(sum_of_args_3, _1, _2, _3)(i, j, k)==6);
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BOOST_CHECK(bind(sum_of_args_4, _1, _2, _3, 4)(i, j, k)==10);
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BOOST_CHECK(bind(sum_of_args_5, _1, _2, _3, 4, 5)(i, j, k)==15);
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BOOST_CHECK(bind(sum_of_args_6, _1, _2, _3, 4, 5, 6)(i, j, k)==21);
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BOOST_CHECK(bind(sum_of_args_7, _1, _2, _3, 4, 5, 6, 7)(i, j, k)==28);
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BOOST_CHECK(bind(sum_of_args_8, _1, _2, _3, 4, 5, 6, 7, 8)(i, j, k)==36);
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BOOST_CHECK(bind(sum_of_args_9, _1, _2, _3, 4, 5, 6, 7, 8, 9)(i, j, k)==45);
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// function compositions with bind
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BOOST_CHECK(bind(sum_of_args_3, bind(sum_of_args_2, _1, 2), 2, 3)(i)==8);
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BOOST_CHECK(
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bind(sum_of_args_9,
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bind(sum_of_args_0), // 0
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bind(sum_of_args_1, _1), // 1
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bind(sum_of_args_2, _1, _2), // 3
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bind(sum_of_args_3, _1, _2, _3), // 6
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bind(sum_of_args_4, _1, _2, _3, 4), // 10
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bind(sum_of_args_5, _1, _2, _3, 4, 5), // 15
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bind(sum_of_args_6, _1, _2, _3, 4, 5, 6), // 21
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bind(sum_of_args_7, _1, _2, _3, 4, 5, 6, 7), // 28
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bind(sum_of_args_8, _1, _2, _3, 4, 5, 6, 7, 8) // 36
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)(i, j, k) == 120);
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// deeper nesting
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result =
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bind(sum_of_args_1, // 12
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bind(sum_of_args_4, // 12
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bind(sum_of_args_2, // 3
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bind(sum_of_args_1, // 1
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bind(sum_of_args_1, _1) // 1
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),
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_2),
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_2,
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_3,
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4)
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)(i, j, k);
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BOOST_CHECK(result == 12);
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test_member_functions();
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return 0;
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}
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