PLT Utilities Test Coverage (plt-20120304-r5436)

Clover coverage report - PLT Utilities Test Coverage (plt-20120304-r5436)

Coverage timestamp: Sat Mar 3 2012 22:01:56 CST

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file stats:	LOC:	73		Methods:	3
	NCLOC:	16		Classes:	1

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BinaryArgContinuation.java

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1		/BEGIN_COPYRIGHT_BLOCK
2
3		PLT Utilities BSD License
4
5		Copyright (c) 2007-2010 JavaPLT group at Rice University
6		All rights reserved.
7
8		Developed by: Java Programming Languages Team
9		Rice University
10		http://www.cs.rice.edu/~javaplt/
11
12		Redistribution and use in source and binary forms, with or without modification, are permitted
13		provided that the following conditions are met:
14
15		- Redistributions of source code must retain the above copyright notice, this list of conditions
16		and the following disclaimer.
17		- Redistributions in binary form must reproduce the above copyright notice, this list of
18		conditions and the following disclaimer in the documentation and/or other materials provided
19		with the distribution.
20		- Neither the name of the JavaPLT group, Rice University, nor the names of the library's
21		contributors may be used to endorse or promote products derived from this software without
22		specific prior written permission.
23
24		THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
25		IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
26		FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND
27		CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28		DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29		DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
30		IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31		OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32
33		END_COPYRIGHT_BLOCK/
34
35		package edu.rice.cs.plt.recur;
36
37		import edu.rice.cs.plt.lambda.Lambda;
38
39		/**
40		* A continuation for results that depend on a two recursive invocations, followed by some
41		* additional computation. Instances must implement {@link #arg1}, which wraps the first recursive
42		* invocation, {@link #arg2}, which wraps the second, and {@link #apply}, which performs the remaining
43		* computation.
44		*/
45		public abstract class BinaryArgContinuation<T1, T2, R> extends PendingContinuation<R> {
46
47		/** Produce a continuation computing the first result of a recursive invocation. */
48		protected abstract Continuation<? extends T1> arg1();
49
50		/** Produce a continuation computing the second result of a recursive invocation. */
51		protected abstract Continuation<? extends T2> arg2();
52
53		/**
54		* Given the results of evaluating {@code arg1()} and {@code arg2()}, produce a continuation for
55		* the ultimate result.
56		*/
57		protected abstract Continuation<? extends R> apply(T1 arg1, T2 arg2);
58
59		/**
60		* Create a {@link ComposedContinuation} in terms of the result of {@code arg1()} and a lambda
61		* that computes {@code arg2()} and ultimately invokes {@code apply()} with the results.
62		*/
63	514	public Continuation<R> step() {
64	514	return new ComposedContinuation<T1, R>(arg1(), new Lambda<T1, Continuation<? extends R>>() {
65	514	public Continuation<? extends R> value(final T1 arg1) {
66	514	return new ComposedContinuation<T2, R>(arg2(), new Lambda<T2, Continuation<? extends R>>() {
67	514	public Continuation<? extends R> value(T2 arg2) { return apply(arg1, arg2); }
68		});
69		}
70		});
71		}
72
73		}