CODEWITHSUNDEEP
fortranfortran77
Karl Yngve Lervåg
Karl Yngve Lervåg

Reputation: 1715

List variables with type and where they are defined in a Fortran 77 program

Is there any way to list all the variables that are defined in a Fortran 77 program, including

  1. where the variable is defined?
  2. which type the variable has?

I was hoping there might either be some dedicated software that could do this, or some compiler flags with e.g. gfortran.

Upvotes: 1

Views: 394

Answers (1)

Alexander Vogt
Alexander Vogt

Reputation: 18098

Have you tried grep? This is a short snippet to give you the occurrences of the base types: 

for i in byte character integer logical \
         real "double[[:blank:]]+precision" \
         complex "double[[:blank:]]+complex" ; do 
    grep -Ein "^[[:blank:]]*${i}[[:blank:]\*(,:]" $(find . -name "*.[fF]*")
done

Of course, this will only work if you are using explicit type declaration throughout your code.

Explanation:

Use grep with regular expressions (-E) and case-insensitive matches (-i) to print out the line number and file (-n) on all Fortran files *.[fF]* in the current folder.

The Regex is: 

"^[[:blank:]]*                       Only whitespaces (if any) in the beginning
              ${i}                   Followed by the variable type
                  [[:blank:]\*(,:]"  Followed immediately by a whitespace, "*", 
                                     "(", ",", or ":"

Upvotes: 1

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