Any directive text that extends past column 132 is ignored. The directive text is truncated, which is likely to produce parsing errors or unexpected results. It cannot be continued using standard Fortran continuation methods. Any user-specified identifier that is used in a directive must follow Fortran rules for identifier formation. Although Fortran rules state that only the first 31 characters of identifiers are significant, to the source preprocessor, the first 132 characters are significant.
Source preprocessing identifier names are case sensitive.
Numeric literal constants must be integer literal constants or real literal constants, as defined for Fortran. The comment, however, must begin and end on a single source line. The blanks shown in the syntax descriptions of the source preprocessing directives are significant. Multiple blanks can appear wherever a single blank appears in a syntax description. The following sections describe the source preprocessing directives.