You can cause HP C++ to set line numbers during compilation from a
number specified in a line control directive. (The resulting line
numbers appear in error message references, but do not alter the line
numbers of the actual source code.)
Description |
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The #line preprocessing directive causes HP C++ to treat
lines following it in the program as if the name of the source file
were filename and the current line number were digit-sequence.
This serves to control the file name and line number that
are given in diagnostic messages. This feature is used primarily by
preprocessor programs that generate C++ code. It enables them to force
HP C++ to produce diagnostic messages with respect to the source code
that is input to the preprocessor rather than the C++ source code
that is output.
HP C++ defines two macros that you can use for error diagnostics. The first is __LINE__, an integer constant equal to the value of the current line number. The second is __FILE__, a quoted string literal equal to the name of the input source file. You can change __FILE__ and __LINE__ using #include or #line directives.
