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This defines a new, or redefines an existing, operator symbol.
The SPECIFIER is à la Prolog. Indeed,
as in Prolog, AQL operators may be declared at runtime using
the built-in operator keyword followed by an Operator (the
one being [re]defined), a fixity/associativity SPECIFIER,
and a precedence level: a natural number in the range [1..1200].
For example,
operator + yfx 500;redefines the symbol '+' to be an infix binary left-associative operator with binding looseness 500 (binding looseness is the opposite of precedence - anti-precedence, so to speak).
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Copyright © 2012 by Hassan Aït-Kaci; All Rights Reserved.
