ExprTk supports three fundamental types which can be used freely in
expressions. The types are as follows:
- Scalar Type
- The scalar type is a singular numeric value. The underlying type is
that used to specialise the ExprTk components (float, double, long
double, MPFR et al).
- Vector Type
- The vector type is a fixed size sequence of contiguous scalar values.
A vector can be indexed resulting in a scalar value. Operations
between a vector and scalar will result in a vector with a size equal
to that of the original vector, whereas operations between vectors
will result in a vector of size equal to that of the smaller of the
two. In both mentioned cases, the operations will occur element-wise.
- String Type
- The string type is a variable length sequence of 8-bit chars. Strings
can be assigned and concatenated to one another, they can also be
manipulated via sub-ranges using the range definition syntax. Strings
however can not interact with scalar or vector types.
