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6207 :: generate c++ code from .nim file

[2020-04-13T21:12:06+02:00]

minimisthupper (orginal) [2020-04-13T21:12:06+02:00] view original

Hi,

is there a way to generate c++ code from my .nim file?

Thanks, Minimisthupper

Stefan_Salewski (orginal) [2020-04-13T21:19:15+02:00] view original

nim cpp mynimfile.nim

The c++ code is stored in the nimcache directory, see

https://nim-lang.org/docs/nimc.html#compiler-usage-generated-c-code-directory

minimisthupper (orginal) [2020-04-13T21:21:56+02:00] view original

Thanks! :)

minimisthupper (orginal) [2020-04-14T20:56:00+02:00] view original

any way to get clean code? my very small nim file is like 400 lines of cpp code

zevv (orginal) [2020-04-14T22:25:52+02:00] view original

Sorry, no. The Nim-generated C and C++ code is ment to be read by - and highly optimized for - compilers, not humans.

jyapayne (orginal) [2020-04-15T00:54:49+02:00] view original

@minimisthupper you can get smaller output if you use -d:release or -d:danger, but the danger flag is not recommended

minimisthupper (orginal) [2020-04-16T11:28:18+02:00] view original

ok, big thanks for answering so fast! :)

juancarlospaco (orginal) [2020-04-16T12:43:16+02:00] view original

You can use a C++ code beautifier, like astyle, and skip the mangling with exportc pragma, but for reading only not for code thats actually used.

minimisthupper (orginal) [2020-04-17T15:04:21+02:00] view original

i get this error every time, when i compile my main file :

@msecond.nim.cpp:9:10: fatal error: 'nimbase.h' file not found
#include "nimbase.h"
         ^~~~~~~~~~~
1 error generated.

dom96 (orginal) [2020-04-17T15:34:38+02:00] view original

You'll need to copy this file beside your .cpp file. This is supposed to be copied automatically when using --genScript (if you're using 1.0.6 it should work), with latest versions of Nim it doesn't get copied (see https://github.com/nim-lang/Nim/issues/13826).

minimisthupper (orginal) [2020-04-17T21:50:36+02:00] view original

ok, thanks!

minimisthupper (orginal) [2020-04-21T15:44:09+02:00] view original

Couldn't render post #38520.

Araq (orginal) [2020-04-21T17:12:05+02:00] view original

No, the Nim compiler always generates multiple C++ files so that they can compiled in parallel.