(guile.info.gz) let-keywords Reference
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23.2.2 let-keywords Reference
-----------------------------
`let-keywords' and `let-keywords*' are used for extracting values from
argument lists which use keywords instead of argument position for
binding local variables to argument values.
`let-keywords' binds all variables simultaneously, while
`let-keywords*' binds them sequentially, consistent with `let' and
`let*' ( Local Bindings).
-- library syntax: let-keywords rest-arg allow-other-keys? (binding
...) expr ...
-- library syntax: let-keywords rest-arg allow-other-keys? (binding
...) expr ...
These macros pick out keyword arguments from REST-ARG, but do not
modify it. This is consistent at least with Common Lisp, which
duplicates keyword arguments in the rest argument. More
explanation of what keyword arguments in a lambda list look like
can be found below in the documentation for `lambda*' (
lambda* Reference). BINDINGs can have the same form as for
`let-optional'. If ALLOW-OTHER-KEYS? is false, an error will be
thrown if anything that looks like a keyword argument but does not
match a known keyword parameter will result in an error.
After binding the variables, the expressions EXPR ... are
evaluated in order.
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