Warning output is written inside the script

[Koushikphy]

I'm using fprettify in VS Code with the Modern Fortran VS Code extension. I have this VS Code setting for fprettify

    "fortran.formatting.formatter": "fprettify",
    "fortran.formatting.fprettifyArgs": [
        "-i 4",
        "-w 2",
        "--enable-replacements",
        "--c-relations",
        "--enable-decl",
        "--whitespace-intrinsics=False",
        "--whitespace-print=False"
    ],

And I have this sample code (for test purpose) with a very long line

program demo

    write(*, "('Just a very long line. Just a very long line. Just a very long line. Just a very long line. Just a very long line. Just a very long line. ',i0)") 100

endprogram

Now, when I run the format document from the right click menu. This code is formatted as

WARNING: File -, line 3
    auto indentation failed due to chars limit, line should be split (limit: 132)
WARNING: File -, line 3
    auto indentation failed due to chars limit, line should be split (limit: 132)
program demo

    write(*, "('Just a very long line. Just a very long line. Just a very long line. Just a very long line. Just a very long line. Just a very long line. ',i0)") 100

endprogram

i.e. the warnings are written inside the code itself. This is certainly wrong. What is going on here and how to fix it.

[nbehrnd]

Since the string is so long, the command including its definition is too long. As far as I know, fprettify is not able to split long strings into smaller bits. Thus, a manual intervention (i.e., an edit by you) is requested. For one, Fortran concatenates individual strings into a larger one by two forward slashes, //. For two, if there is an overly long line of instruction, use a trailing & to indicate that the command extends to the next line.

As an illustration for the concepts above with Fortran 90+:

program demo

   implicit none

   write (*, '(a)') "Just a very long line. Just a very long line." &
      //"Just a very long line. Just a very long line. Just a very" &
      //"long line. Just a very long line."

end program demo

Compared to FORTRAN 77 (character 73 [including] and beyond on a line is considered as comment irrelevant to the compiler), use the flexibility of up to 132 chars per line in the free form of contemporary Fortran with a grain of salt.*) Though we no longer use punch cards (this often) and now have computers with (on occasion multiple) wider screen(s) attached, you / your colleagues will welcome if the lines are not overly long: then, a difference view (displaying two codes side by side in separate tabs/terminals) and managing revisions e.g., in git tend to be easier. (And using GitHub to learn by the examples by others, I prefer to read the code blocks without need to use the horizontal scroll bar, too.)

(In FORTRAN 77/fixed format, the next line continuing an (ongoing) instruction already starts with char 6, instead of 7.)

*) Right of the tip of my hat, I don't recall the maximum number of times you are allowed to use the & to extend a command over multiple lines.

[Koushikphy]

Since the string is so long, the command including its definition is too long. As far as I know, fprettify is not able to split long strings into smaller bits. Thus, a manual intervention (i.e., an edit by you) is requested. For one, Fortran concatenates individual strings into a larger one by two forward slashes, //. For two, if there is an overly long line of instruction, use a trailing & to indicate that the command extends to the next line.

As an illustration for the concepts above with Fortran 90+:

program demo

   implicit none

   write (*, '(a)') "Just a very long line. Just a very long line." &
      //"Just a very long line. Just a very long line. Just a very" &
      //"long line. Just a very long line."

end program demo

Compared to FORTRAN 77 (character 73 [including] and beyond on a line is considered as comment irrelevant to the compiler), use the flexibility of up to 132 chars per line in the free form of contemporary Fortran with a grain of salt.*) Though we no longer use punch cards (this often) and now have computers with (on occasion multiple) wider screen(s) attached, you / your colleagues will welcome if the lines are not overly long: then, a difference view (displaying two codes side by side in separate tabs/terminals) and managing revisions e.g., in git tend to be easier. (And using GitHub to learn by the examples by others, I prefer to read the code blocks without need to use the horizontal scroll bar, too.)

(In FORTRAN 77/fixed format, the next line continuing an (ongoing) instruction already starts with char 6, instead of 7.)

*) Right of the tip of my hat, I don't recall the maximum number of times you are allowed to use the & to extend a command over multiple lines.

Your comment does nothing to address the problem I posted. I know the line is too long. I did it intentionally. The problem is fprettify is doing something here that it should not be doing, i.e. dumping the errors/warning inside the source code itself. I don't know, maybe it's the problem with the VS Code extension itself.

[Koushikphy]

Refer to this fortran-lang/vscode-fortran-support#508 (comment)