Operator overloading and type conversions
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The document discusses operator overloading and type conversions in C++, highlighting key concepts such as operator functions, unary and binary operator overloading, and type conversion rules. It emphasizes that operator overloading allows the use of operators on user-defined data types while specifying certain limitations and requirements for implementation. Additionally, the document provides key terms related to the topic and mentions restrictions on automatic type conversions.
Operator overloading and type conversions
- 2. KEY CONCEPTS OVERLOADING OPERATOR FUNCTIONS OVERLOADING UNARY OPERATORS STRING MANIPULATIONS BASIC TO CLASS TYPE CLASS TO CLASS TYPE OPERATOR OVERLOADING OVERLOADING BINARY OPERATORS USING FRIENDS FOR OVERLOADING TYPE CONVERSIONS CLASS TO BASIC TYPE OVERLOADING RULES
- 3. SUMMARY Operator overloading is one of the important features of C++ language that enhances its exhaustibility. Using overloading feature we can add two user defined data types such as objects , with the same syntax , just as basic data types. We can overload all the C++ operators except the following: • Scope resolution operator(::) • Class member access operator(.,.*) • Size operator (sizeof) • Conditional operator(?:) Operator overloading is done with the help of special function , called operator function ,which describes the special task to an operator
- 4. SUMMARY CONTD There are certain restrictions and limitations in overloading operators. Operator functions must either be member-functions(nonstatic) or friend functions. The overloading operator must have at least one operand that is of user-defined type. The compiler does not support automatic type conversions for the user- defined data types. We can use casting operator to achieve this. The casting operator function should satisfy the following conditions: • It must be a class member • It must not specify a return type • It must not have any arguments
- 5. KEY TERMS ARITHMETIC NOTATION BINARY OPERATORS CASTING CASTING OPERATOR CONSTRUCTOR CONVERSION FUNCTION DESTINATION CLASS FRIEND FRIEND FUNCTION FUNCTIONAL NOTATION MANIPULATING STRINGS
- 6. KEY TERMS CONTD OPERATOR OPERATOR FUNCTION OPERATOR OVERLOADING SCALAR MULTIPLICATION SEMANTICS SIZEOF SOURCE CLASS SYNTAX TEMPORARY OBJECT TYPE CONVERSIONS UNARY OPERATORS
- 7. REFERENCES OBJECT ORIENTED PROGRAMMING WITH C++ -E. BALAGURUSAMY