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How can I check the implementation of a builtin function?

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How can I check the implementation of a builtin function?

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1

Is there a way to check the implementation of a builtin function (e.g. load-file) without cloning the Emacs repository?

help

share|improve this question

edited 7 hours ago

Drew

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novanova

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• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Some built-in functions are written in C in which case you do need a copy of that source code in order for Emacs to be able to show you the definition. You don't need to clone a repository, though -- a tarball of the sources is absolutely fine for this purpose. For elisp functions, unless you've installed Emacs without the .el (or .el.gz) sources, Emacs will take you to the definitions by default when you ask for help about a function (or variable) and follow the link provided.
  
  – phils
  4 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  n.b. if you installed Emacs via your OS package manager, then you should review all other related packages (which may not be installed), as there may be things that you are missing. (e.g. Debian's basic package includes neither the elisp sources nor the manuals, which makes for an extremely incomplete install).
  
  – phils
  2 hours ago
  
  

  
  
  
  

add a comment
 | 

1

Is there a way to check the implementation of a builtin function (e.g. load-file) without cloning the Emacs repository?

help

share|improve this question

edited 7 hours ago

Drew

51.8k44 gold badges6868 silver badges120120 bronze badges

asked 8 hours ago

novanova

611 bronze badge

New contributor

nova is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Some built-in functions are written in C in which case you do need a copy of that source code in order for Emacs to be able to show you the definition. You don't need to clone a repository, though -- a tarball of the sources is absolutely fine for this purpose. For elisp functions, unless you've installed Emacs without the .el (or .el.gz) sources, Emacs will take you to the definitions by default when you ask for help about a function (or variable) and follow the link provided.
  
  – phils
  4 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  n.b. if you installed Emacs via your OS package manager, then you should review all other related packages (which may not be installed), as there may be things that you are missing. (e.g. Debian's basic package includes neither the elisp sources nor the manuals, which makes for an extremely incomplete install).
  
  – phils
  2 hours ago
  
  

  
  
  
  

add a comment
 | 

Is there a way to check the implementation of a builtin function (e.g. load-file) without cloning the Emacs repository?

help

share|improve this question

edited 7 hours ago

Drew

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asked 8 hours ago

novanova

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share|improve this question

edited 7 hours ago

Drew

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novanova

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share|improve this question

edited 7 hours ago

Drew

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novanova

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edited 7 hours ago

Drew

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edited 7 hours ago

Drew

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3 Answers
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3

For load-file C-h f load-filethen follow the link from the first line, in this case:

load-file is an interactive compiled Lisp function in ‘files.el’.

will open the elisp function definition, C source code, AFAIK, will require the repo.

share|improve this answer

edited 8 hours ago

answered 8 hours ago

MuihlinnMuihlinn

35611 silver badge88 bronze badges

add a comment
 | 

1

If you are interested in looking at a file from a computer that Emacs isn't even installed on, you can take the filename it's found in from help (C-h f load-file RET), then browse the source at Emacs's GNU Savannah repository, or the Github mirror.

This code will be later than the version of Emacs you're using, and it may be different in important ways.

share|improve this answer

answered 8 hours ago

zckzck

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add a comment
 | 

1

On debian, and I guess on Ubuntu as well, the elisp sources (.el files as opposed to byte compiled .elc files) are available in the emacs-el package.

The elisp sources are not provided in the basic emacs package since they're not necessary to run emacs, only usefull if, like you do, you want to look at the source.

So absolutely don't need to clone the emacs repo, you just need to install that emacs-el package, eg

sudo apt-get install emacs-el

share|improve this answer

answered 7 hours ago

JeanPierreJeanPierre

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3

For load-file C-h f load-filethen follow the link from the first line, in this case:

load-file is an interactive compiled Lisp function in ‘files.el’.

will open the elisp function definition, C source code, AFAIK, will require the repo.

share|improve this answer

edited 8 hours ago

answered 8 hours ago

MuihlinnMuihlinn

35611 silver badge88 bronze badges

add a comment
 | 

3

For load-file C-h f load-filethen follow the link from the first line, in this case:

load-file is an interactive compiled Lisp function in ‘files.el’.

will open the elisp function definition, C source code, AFAIK, will require the repo.

share|improve this answer

edited 8 hours ago

answered 8 hours ago

MuihlinnMuihlinn

35611 silver badge88 bronze badges

add a comment
 | 

For load-file C-h f load-filethen follow the link from the first line, in this case:

load-file is an interactive compiled Lisp function in ‘files.el’.

will open the elisp function definition, C source code, AFAIK, will require the repo.

share|improve this answer

edited 8 hours ago

answered 8 hours ago

MuihlinnMuihlinn

35611 silver badge88 bronze badges

load-file is an interactive compiled Lisp function in ‘files.el’.

share|improve this answer

edited 8 hours ago

answered 8 hours ago

MuihlinnMuihlinn

35611 silver badge88 bronze badges

answered 8 hours ago

MuihlinnMuihlinn

35611 silver badge88 bronze badges

answered 8 hours ago

MuihlinnMuihlinn

35611 silver badge88 bronze badges

1

If you are interested in looking at a file from a computer that Emacs isn't even installed on, you can take the filename it's found in from help (C-h f load-file RET), then browse the source at Emacs's GNU Savannah repository, or the Github mirror.

This code will be later than the version of Emacs you're using, and it may be different in important ways.

share|improve this answer

answered 8 hours ago

zckzck

5,91211 gold badge1616 silver badges5656 bronze badges

add a comment
 | 

1

If you are interested in looking at a file from a computer that Emacs isn't even installed on, you can take the filename it's found in from help (C-h f load-file RET), then browse the source at Emacs's GNU Savannah repository, or the Github mirror.

This code will be later than the version of Emacs you're using, and it may be different in important ways.

share|improve this answer

answered 8 hours ago

zckzck

5,91211 gold badge1616 silver badges5656 bronze badges

add a comment
 | 

If you are interested in looking at a file from a computer that Emacs isn't even installed on, you can take the filename it's found in from help (C-h f load-file RET), then browse the source at Emacs's GNU Savannah repository, or the Github mirror.

This code will be later than the version of Emacs you're using, and it may be different in important ways.

share|improve this answer

answered 8 hours ago

zckzck

5,91211 gold badge1616 silver badges5656 bronze badges

share|improve this answer

answered 8 hours ago

zckzck

5,91211 gold badge1616 silver badges5656 bronze badges

answered 8 hours ago

zckzck

5,91211 gold badge1616 silver badges5656 bronze badges

answered 8 hours ago

zckzck

5,91211 gold badge1616 silver badges5656 bronze badges

1

On debian, and I guess on Ubuntu as well, the elisp sources (.el files as opposed to byte compiled .elc files) are available in the emacs-el package.

The elisp sources are not provided in the basic emacs package since they're not necessary to run emacs, only usefull if, like you do, you want to look at the source.

So absolutely don't need to clone the emacs repo, you just need to install that emacs-el package, eg

sudo apt-get install emacs-el

share|improve this answer

answered 7 hours ago

JeanPierreJeanPierre

4,90711 gold badge1010 silver badges3030 bronze badges

add a comment
 | 

1

On debian, and I guess on Ubuntu as well, the elisp sources (.el files as opposed to byte compiled .elc files) are available in the emacs-el package.

The elisp sources are not provided in the basic emacs package since they're not necessary to run emacs, only usefull if, like you do, you want to look at the source.

So absolutely don't need to clone the emacs repo, you just need to install that emacs-el package, eg

sudo apt-get install emacs-el

share|improve this answer

answered 7 hours ago

JeanPierreJeanPierre

4,90711 gold badge1010 silver badges3030 bronze badges

add a comment
 | 

On debian, and I guess on Ubuntu as well, the elisp sources (.el files as opposed to byte compiled .elc files) are available in the emacs-el package.

The elisp sources are not provided in the basic emacs package since they're not necessary to run emacs, only usefull if, like you do, you want to look at the source.

So absolutely don't need to clone the emacs repo, you just need to install that emacs-el package, eg

sudo apt-get install emacs-el

share|improve this answer

answered 7 hours ago

JeanPierreJeanPierre

4,90711 gold badge1010 silver badges3030 bronze badges

sudo apt-get install emacs-el

share|improve this answer

answered 7 hours ago

JeanPierreJeanPierre

4,90711 gold badge1010 silver badges3030 bronze badges

answered 7 hours ago

JeanPierreJeanPierre

4,90711 gold badge1010 silver badges3030 bronze badges

answered 7 hours ago

JeanPierreJeanPierre

4,90711 gold badge1010 silver badges3030 bronze badges