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extern int x1f4_peek_expression (void *x1f4_expression, void *data, int (*this) (void *, const struct x1f4_function_type *));
The x1f4_peek_expression
function lists the symbolic function occurences
in the x1f4_expression
parsed expression representation by calling the
this
method with the function listing data
context and the
symbolic function definition as parameters for each variable occurence, for as
long as this
returns 0.
See struct x1f4_function_type.
The function returns 0
if this
was never called or never returned
non zero, the first (and only) non zero return of this
otherwise.