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Annotation of coherent/a/usr/man/ALL/_23line, revision 1.1.1.1

1.1       root        1: 
                      2: 
                      3: #line                Preprocessing Directive                #line
                      4: 
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                      6: 
                      7: 
                      8: Reset line number
                      9: 
                     10: #lliinnee _n_u_m_b_e_r _n_e_w_l_i_n_e
                     11: #lliinnee _n_u_m_b_e_r _f_i_l_e_n_a_m_e _n_e_w_l_i_n_e
                     12: #lliinnee _m_a_c_r_o_s _n_e_w_l_i_n_e
                     13: 
                     14: #line is  a preprocessing directive  that resets the  line number
                     15: within  a file.   The ANSI  Standard defines  the line  number as
                     16: being the number of newline characters read, plus one.
                     17: 
                     18: #line  can take  any of  three forms.   The first,  #lliinnee _n_u_m_b_e_r,
                     19: resets the current line number in the source file to number.  The
                     20: second, #lliinnee  _n_u_m_b_e_r _f_i_l_e_n_a_m_e, resets the  line number to number
                     21: and changes  the name of the file to  filename.  The third, #lliinnee
                     22: _m_a_c_r_o_s,  contains  macros  that  have  been  defined  by  earlier
                     23: preprocessing directives.  When  the macros have been expanded by
                     24: the preprocessor, the #lliinnee instruction will then resemble one of
                     25: the first two forms and be interpreted appropriately.
                     26: 
                     27: ***** See Also *****
                     28: 
                     29: C preprocessor
                     30: 
                     31: ***** Notes *****
                     32: 
                     33: Most often, #line is used  to ensure that error messages point to
                     34: the correct line in  the program's source code.  A program gener-
                     35: ator may  use this directive  to associate errors  in generated C
                     36: code with the  original sources.  For example, the program gener-
                     37: ator yyaacccc uses #lliinnee instructions to link the C code it generates
                     38: with the yyaacccc code written by the programmer.
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                     64: COHERENT Lexicon                                           Page 1
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