Suppose I need to define a parametric type with numeric values that are real numbers, but not integers. Initially I thought of doing something like: struct Foo{Integer<:T<:Real} end but I am aware that it has two issues: the syntax Integer <: T means a type T that can at least hold an integer, …

Numeric types and their relationships

juliohm December 20, 2017, 5:46am 3

Thanks @yakir12, Union sure solves it.

I am still curious about why the type hierarchy was not chosen so that Integer <: Rational, probably a performance bottleneck?

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