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Guile Reference Manual

13.1.1.3 Writing your own snarfing macros

When you want to use the general snarfing machanism, but none of the provided macros fits your need, you can use the macro SCM_SNARF_INIT.

For example, the SCM_SYMBOL macro can be defined like this:

#define SCM_SYMBOL(c_name, scheme_name) \ static SCM c_name \ SCM_SNARF_INIT(c_name = scm_permanent_object (scm_str2symbol (scheme_name)))

Macro: SCM_SNARF_INIT (code)

When processed normally, SCM_SNARF_INIT expands to nothing; when processed by the snarfer, it causes code to be included in the initialization action file, followed by a semicolon.