Change the value of the field labeled 'fixed form line length.' The value must be at least 72.Expand the Fortran category, and choose Editor.On Windows or Linux, click Window > Preferences on Mac OS X, click Eclipse > Preferences. To change the maximum line width in fixed form sources. Often, this is 72 characters (i.e., anything after column 72 is ignored and treated as a comment), although most compilers allow you to change this to permit longer lines. While free source form allows lines to be arbitrarily long, in fixed form, there is a predetermined maximum line width. Workbench User Guide > Reference > Preferences > Content Types. txt files.įor more information on configuring content types,Ĭlick on Help > Help Contents in Eclipse and navigate to Will make any file named old-fortran-code.txt be recognized as Fortran source code, but not other. You can also specify individual filenames by omitting the *. To make all files with a '.fre' filename extension be recognized as Fortran source code, enter.In the 'Content types:' tree in the right pane, navigate to Text > Fortran Source File.For each filename extension(s) you want to change, select the appropriate source form from the dropdown box.Īdditional filename extensions can be added by changing the Eclipse Content Type preferences.

In the tree on the left, navigate to Fortran General > Source Form.In the Fortran Projects view, right-click on a project, and choose Properties.The filename extensions listed above are the defaults for new Fortran projects. The default filename extensions are as follows.įree source form with C preprocessor directivesĬonfiguring Source Form/Filename Extension Associations Photran uses filename extensions to determine whether a file is in fixed- or free-form and whether or not it is C-preprocessed.

(Although column 72 is specified in the Fortran standard, most compilers allow you to change this to permit longer lines Photran allows you to change it as well, as described in the next section.) In fixed form, a 'c', 'C', '*', or '!' in column 1 indicates a comment columns 1 through 5 are used for a statement label a character in column 6 indicates a continuation line and program statements are contained in columns 7 through 72. It is more common in Fortran 77 and earlier programs, although it is still part of Fortran 2003. Photran also supports C preprocessor directives, such as #define, #ifdef, #include, _FILE_, and _LINE_ in Fortran code.įixed form is an older form designed for punch cards. Photran supports both fixed-form and free-form Fortran code.

Configuring Source Forms and Filename Extensions

Photran eclipse neon.2