two underscore characters, macro value _line_ Integer value representing the current line in the source code file being compiled. In general, compound statements span multiple lines, although in simple incarnations a whole compound statement may forex credit card axis bank payment status be contained in one line. All C compilers have this constant defined to some value. (Usually, the suite contains only function definitions.) When the classs suite finishes execution, its execution frame is discarded but its local namespace is saved. For example: 1 2 #line 20 "assigning variable" int a?; This code will generate an error that will be shown as error in file "assigning variable line. Exc_type receives the object identifying the exception; sys. For example: 1 2 3 4 #ifndef table_size #define table_size 100 #endif int tabletable_size; In this case, if when arriving at this piece of code, the table_size macro has not been defined yet, it would be defined to a value of 100.
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This means that the expression is evaluated once, when the function is defined, and that the same pre-computed value is used for each call. Its syntax is: #define identifier replacement, when the preprocessor encounters this directive, it replaces any occurrence of identifier in the rest of the code by replacement. The preprocessor examines the code before actual compilation of code begins and resolves all these directives before any code is actually generated by regular statements. In the case that the file is not found, the compiler interprets the directive as a header inclusion, just as if the"s were replaced by angle-brackets ( ). "filename" is an optional parameter that allows to redefine the file name that will be shown. A suite can be one or more semicolon-separated simple statements on the same line as the header, following the headers colon, or it can be one or more indented statements on subsequent lines. Exc_traceback receives a traceback object (see section The standard type hierarchy ) identifying the point in the program where the exception occurred.