Ada Programming/Operators

Operators __TOC__ Standard operators Ada allows operator overloading for all standard operators and so the following summaries can only describe the suggested standard operations for each operator. It is quite possible to misuse any standard operator to perform something unusual. Each operator is either a keyword or a delimiter—hence all operator pages are redirects to the appropriate keyword or delimiter. Operators have arguments which in the RM are called Left and Right for binary operators, Right for unary operators (indicating the position with respect to the operator symbol). The list is sorted from lowest precedence to highest precedence. Logical operators and and , (also keyword and) or or , (also keyword or) xor exclusive or , (also keyword xor) Relational operators /= Not Equal , (also special character /=) = Equal , (also special character =) < Less than , (also special character <) <= Less than or equal to (), (also special character <=) > Greater than (), (also special character >) >= Greater than or equal to (), (also special character >=) Binary adding operators + Add , (also special character +) - Subtract , (also special character -) & Concatenate , & , (also special character &) Unary adding operators + Plus sign , (also special character +) - Minus sign , (also special character -) Multiplying operator * Multiply, , (also special character *) / Divide , (also special character /) mod modulus (also keyword mod) rem remainder (also keyword rem) Highest precedence operator ** Power , (also special character **) not logical not , (also keyword not) abs absolute value (also keyword abs) Short-circuit control forms These are not operators and thus cannot be overloaded. and then e.g. if Y /= 0 and then X/Y > Limit then ... or else e.g. if Ptr = null or else Ptr.I = 0 then ... Membership tests The Membership Tests also cannot be overloaded because they are not operators. in element of, , e.g. if I in Positive then, (also keyword in) not in not element of, , e.g. if I not in Positive then, (also keywords not in) Range membership test if Today not in Tuesday .. Thursday then ... Subtype membership test Is_Non_Negative := X in Natural; Class membership test exit when Object in Circle'Class; Range membership test if Today not in Tuesday .. Thursday then ... Choice list membership test Ada 2012 extended the membership tests to include the union (short-circuit or) of several range or value choices. if Today in Monday .. Wednesday | Friday then ... See also Wikibook Ada Programming Ada 95 Reference Manual 4 5 Operators and Expression Evaluation Ada 2005 Reference Manual 4 5 Operators and Expression Evaluation Ada Quality and Style Guide 2 1 3 Alignment of Operators 5 7 4 Overloaded Operators 5 7 5 Overloading the Equality Operator Operators es:Programación en Ada/Operadores