File: is_infix.doc

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\DOC is_infix

\TYPE {is_infix : (string -> bool)}

\SYNOPSIS
Determines whether an operator is infix.

\DESCRIBE
This predicate returns {true} if the given string argument is the name of
an infix operator (a constant); it returns {false} otherwise.

\EXAMPLE
{
#is_infix `$+`;;
false : bool

#is_infix `+`;;
true : bool

#is_infix `SUC`;;
false : bool
}
\SEEALSO
infixes, is_binder, is_constant.

\ENDDOC