www.delorie.com/gnu/docs/guile/guile_148.html   search  
 
Buy GNU books!


Guile Reference Manual

[ < ] [ > ]   [ << ] [ Up ] [ >> ]         [Top] [Contents] [Index] [ ? ]

19.6 Executing Scheme code

Once you have an interpreter running, you can ask it to evaluate Scheme code. There are two calls that implement this:

Function: SCM gh_eval_str (char *scheme_code)
This asks the interpreter to evaluate a single string of Scheme code, and returns the result of the last expression evaluated.

Note that the line of code in scheme_code must be a well formed Scheme expression. If you have many lines of code before you balance parentheses, you must either concatenate them into one string, or use gh_eval_file().

Function: SCM gh_eval_file (char *fname)
Function: SCM gh_load (char *fname)
gh_eval_file is completely analogous to gh_eval_str(), except that a whole file is evaluated instead of a string. gh_eval_file returns SCM_UNSPECIFIED.

gh_load is identical to gh_eval_file (it's a macro that calls gh_eval_file on its argument). It is provided to start making the gh_ interface match the R5RS Scheme procedures closely.


  webmaster     delorie software   privacy  
  Copyright 2003   by The Free Software Foundation     Updated Jun 2003