Changing Languages in a file

Changing Languages in a file

[Jonathan Seng]

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I need to change languages within a file used for generating code in another
language.  For example, I might have a Python script generating C or C++
code.

The documentation tells me I can specify at the top of the file for the
entire file, but I can't find a way to change this for sections of a file.

Is there a way to do this?

Thank you,

Jonathan

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Re: Changing Languages in a file

[Anselm Helbig]

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Hi!

> I need to change languages within a file used for
> generating code in another language.  For example,
> I might have a Python script generating C or C++
> code.
> 
> The documentation tells me I can specify at the top
> of the file for the entire file, but I can't find a
> way to change this for sections of a file.
> 
> Is there a way to do this?

This is currently a weak point of Emacs. It is built around the
assumption that each buffer has exactly one major mode at a time. Read
more about major modes here:

  (info "(emacs) Major Modes")

There are some hacks to overcome this restriction, they are listed
here: 

  http://www.emacswiki.org/emacs/MultipleModes

However, setting one of these up can be a bit daunting, especially for
someone new to Emacs. IMO the cleanest and most practical solution
would be to keep your code generation templates in separate files.

HTH, 

Anselm



-- 
Anselm Helbig 
mailto:anselm.helbig+news2009@googlemail.com

Re: Changing Languages in a file

[Colin S. Miller]

Jonathan Seng wrote:
> I need to change languages within a file used for generating code in 
> another language.  For example, I might have a Python script generating 
> C or C++ code.
> 
> The documentation tells me I can specify at the top of the file for the 
> entire file, but I can't find a way to change this for sections of a file.
> 
> Is there a way to do this?
> 
> Thank you,
> 
> Jonathan

Jonathan,

If the C code is localalised to a few blocks in the python, then
this works.

M-x make-indirect-buffer RET <new buffer name>
C-x b <new buffer name>
Select the C code
M-x narrow-to-region
M-x c-mode

Not idea but it works.

HTH,
Colin S. Miller

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