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C++ Mathematical Expression Library (ExprTk) http://www.partow.net/programming/exprtk/index.html

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Arash Partow 2014-12-02 05:07:42 +11:00
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@ -1173,12 +1173,12 @@ In those situations, ExprTk can perform compile-time type checking to
validate that function invocations are carried out using the correct validate that function invocations are carried out using the correct
sequence of parameters. Furthermore performing the checks at compile sequence of parameters. Furthermore performing the checks at compile
-time rather than at run-time (aka every time the function is invoked) -time rather than at run-time (aka every time the function is invoked)
will result expression evaluation performance gains. will result in expression evaluation performance gains.
Compile-time type checking can be requested by passing a string Compile-time type checking can be requested by passing a string
representing the desired parameter sequence to the constructor of the representing the desired parameter sequence to the constructor of the
igeneric_function. The following example demonstrates how this can be igeneric_function. The following example demonstrates how this can be
done: achieved:
template <typename T> template <typename T>
struct too : public exprtk::igeneric_function<T> struct too : public exprtk::igeneric_function<T>
@ -1206,9 +1206,10 @@ exactly four parameters in the following sequence:
(d) Scalar (d) Scalar
One further refinement to the type checking facility is possibility of One further refinement to the type checking facility is the
a variable number of trailing common types which can be accomplished possibility of a variable number of trailing common types which can be
by using a wildcard '*' at the end of the sequence definition. accomplished by using a wildcard '*' at the end of the sequence
definition.
template <typename T> template <typename T>
struct too : public exprtk::igeneric_function<T> struct too : public exprtk::igeneric_function<T>