From: Josh Stratton <strattonbrazil@gmail.com>
To: guile-user@gnu.org
Subject: simple example to evaluate strings
Date: Fri, 20 Dec 2013 19:57:41 -0800 [thread overview]
Message-ID: <CAPVmgLgYTLByWjfHCZ-AfO_TJwo9umEA-wLUiViwik9P2kp1AA@mail.gmail.com> (raw)
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I'm completely new to guile and am trying to find a simple example of
evaluating a string inside C with some kind of context. I want to execute
small self-contained strings provided by a user. I've looked at various
examples, but everything I've seen seems uses the shell, which seems like
more than I need. The context doesn't need to persist between evals.
Is there an example that would allow me to do something like this?
float evaluateExpression(char* expression)
{
if (!initialized) {
scm_init_guile();
initialized = true;
}
// making stuff up here
some_guile_context = ...
some_guile_context.add("someDef", 5); // add some definitionos the
expression might expect to be defined
some_guile_response = some_guile_context.eval(expression); //
expression might use "someDef" like (* someDef 8)
return scm_arg_to_float(scm_guile_response[0]);
}
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next reply other threads:[~2013-12-21 3:57 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-21 3:57 Josh Stratton [this message]
2013-12-21 13:06 ` simple example to evaluate strings Paul Emsley
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