A polymorphic multiplier and/or divider. This adder has two input ports, both of which are multiports, and one output port, which is not. The types on the ports are undeclared and will be resolved by the type resolution mechanism. Data that arrives on the input port named multiply will be multiplied, and data that arrives on the input port named divide will be divided. Any token type supporting multiplication and division can be used. In most domains, either input port can be left unconnected. Thus, to get a simple multiplier (with no division), just leave the divide input unconnected.
Currently, the type system is quite liberal about the resolved types it will permit at the inputs. In particular, it may permit the multiply and divide inputs to resolve to types that cannot in fact be multiplied or divided. In these cases, a run-time error will occur. In the future, we hope that the type system will intercept such errors before run time.
This actor does not require that each input channel have a token upon firing. It will multiply or divide available tokens at the inputs and ignore the channels that do not have tokens. It consumes at most one input token from each port. If no input tokens are available on the multiply inputs, then a numerator of one is assumed for the division operations. The "one" is obtained by calling the one() method of the first token seen at the divide input. If no input tokens are available at all, then no output is produced.
@author Edward A. Lee @version $Id: MultiplyDivide.java,v 1.40 2007/12/07 06:26:14 cxh Exp $ @since Ptolemy II 0.3 @Pt.ProposedRating Green (eal) @Pt.AcceptedRating Green (bilung) | |