Each function definition has the following form:
<simple-identifier>(<simple-identifier>[, <simple-identifier>]*) = <expression>
A function definition can be thought of as a parameterized formula. Syntactically, it consists of two parts separated by “=”:
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Left hand side: the function name followed by a parentheses-enclosed, comma-separated list of formal parameters. The function name and formal parameters are all simple identifiers.
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Right hand side: an expression that may contain occurrences of the formal parameters specified in the left hand side
Each function definition ends with a line break.
The cost engine evaluates a function invocation by evaluating the right hand side of the function definition (in the same module) with a matching name, substituting the invocation’s actual parameters for the definition’s corresponding formal parameters. See Function Invocations for information on function invocations.
Note: CSL provides a number of predefined functions. See Predefined Functions for more information.
See the following topics for information on each syntactic category mentioned above: