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  3. April 2008

Re: Just an observation

Simon Coulter wrote:

Can't recall about Pascal but C requires two operators because it allows assignment IN an equality context (i.e., if ( a = b) which doesn't behave in the obvious manner). The only reason C can do this is because it also has the behaviour of 0 is false and anything else is true. Any language that allows both assignment and equality in the same statement requires two operators in order to distinguish between both operations.

Assignment within an equality (and the other possibilities, equality within an assignment, multiple assignment (of the form a=b=c=1 meaning "a:=1;b:=1;c:=1"), and multiple equality (with that same form meaning "a==b and b==c and c==1") constitutes the 0.01% of cases I mentioned, where the context would be ambiguous, and separate operators needed.


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