mikroC
mikroC - C Compiler for Microchip PIC microcontrollers
making it simple...
OBJECTS AND LVALUES
Objects
An object is a specific region of memory that can hold a fixed or variable value (or set of values). To prevent confusion, this use of the word object is different from the more general term used in
Each value has an associated name and type (also known as a data type). The name is used to access the object. This name can be a simple identifier, or it can be a complex expression that uniquely references the object.
Objects and Declarations
Declarations establish the necessary mapping between identifiers and objects. Each declaration associates an identifier with a data type.
Associating identifiers with objects requires each identifier to have at least two attributes: storage class and type (sometimes referred to as data type). The mikroC compiler deduces these attributes from implicit or explicit declarations in the source code. Commonly, only the type is explicitly specified and the storage class specifier assumes automatic value auto.
Generally speaking, an identifier cannot be legally used in a program before its declaration point in the source code. Legal exceptions to this rule (known as forward references) are labels, calls to undeclared functions, and struct or union tags.
The range of objects that can be declared includes:
variables; functions; types; arrays of other types; structure, union, and enumeration tags; structure members; union members; enumeration constants; statement labels; preprocessor macros.
The recursive nature of the declarator syntax allows complex declarators. You’ll probably want to use typedefs to improve legibility if constructing complex objects.
page |
|
52 | MikroElektronika: Development tools - Books - Compilers |
|