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order of logical operations in CAS - Wes Loewer - 10-14-2022 03:40 AM
I noticed that in Home A OR B AND C is treated as A OR (B AND C) as expected with AND having a higher precedence than OR.
However, in CAS a OR b AND c is treated as (a OR b) AND c, evaluating left to right with AND and OR having the same precedence.
For example:
Home:
true OR false AND false --> 1
CAS (and XCAS)
true OR false AND false --> false
Is this a bug, or is this the intended behavior?
RE: order of logical operations in CAS - parisse - 10-14-2022 06:18 AM
Indeed, and and or have the same precedence in CAS because they are parsed with the same parser token in input_parser.yy (%left T_AND_OP), cf. input_lexer.ll
Code:
"&&" index_status(yyextra)=0; (*yylval)=gen(at_and,2); return T_AND_OP;
...
"||" index_status(yyextra)=0; (*yylval)=gen(at_ou,2); return T_AND_OP;RE: order of logical operations in CAS - Wes Loewer - 10-14-2022 01:36 PM
(10-14-2022 06:18 AM)parisse Wrote: Indeed, and and or have the same precedence in CAS ...
Okay, that's good to know. Thank you for clarifying.