263 |
@section Querying variable bindings |
@section Querying variable bindings |
264 |
|
|
265 |
Guile provides a procedure for checking whether a symbol is bound in the |
Guile provides a procedure for checking whether a symbol is bound in the |
266 |
top level environment. If you want to test whether a symbol is locally |
top level environment. |
|
bound in expression, you can use the @code{bound?} macro from the module |
|
|
@code{(ice-9 optargs)}, documented in @ref{Optional Arguments}. |
|
267 |
|
|
268 |
@c NJFIXME explain [env] |
@c NJFIXME explain [env] |
269 |
@deffn {Scheme Procedure} defined? sym [env] |
@deffn {Scheme Procedure} defined? sym [env] |