[GiNaC-list] Can GiNaC set info_flag?

Seungyun Cho kivoloid at gmail.com
Thu May 13 04:24:14 CEST 2010

For example, I want to set a symbol r to be rational, or real, but
without specifying a value.
I know one can use info(info_flags::real) to determine if an object is real,
but I want to do the opposite.
I found a type 'realsymbol' to do this, but I want many other scopes such as
rational, prime, positive integer, pure imaginary, etc.
Is there any solution?
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