Once you have an interpreter running, you can ask it to evaluate Scheme code. There are two calls that implement this:
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_fileis completely analogous to
gh_eval_str(), except that a whole file is evaluated instead of a string. Returns the result of the last expression evaluated.
gh_load is identical to
gh_eval_file (it's a macro that
gh_eval_file on its argument). It is provided to start
gh_ interface match the R4RS Scheme procedures
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