* module/ice-9/psyntax.scm (with-syntax): Allow definitions in the body,
as seems to be suggested by the R6RS.
* test-suite/tests/syncase.test ("with-syntax"): Add test.
* module/ice-9/psyntax-pp.scm: Regenerate.
* module/ice-9/psyntax.scm (lookup): Reflow comment.
(chi-top, syntax): Add comments about mod for lookup.
(set!): Lookup the identifier in the module attached to its syntax
object. In the (set! MACRO foo) case, after expanding the macro, chi
the resulting expression with the empty wrap, as syntax-type
does. Seems to fix the case where the expansion references
lexically-bound variables.
* module/ice-9/psyntax-pp.scm: Regenerated.
* test-suite/tests/syncase.test: Add a bunch of tests.
* module/ice-9/psyntax.scm (underscore?): New helper, like ellipsis?.
(syntax-case): Treat the _ pattern as a matches-all pattern,
disallowing it from the keyword list. Another well-thought part of the
R6RS.
($sc-dispatch): Dispatch _ patterns.
* module/ice-9/psyntax-pp.scm: Regenerated.
* test-suite/tests/syncase.test ("_ is a placeholder"): Add a test.
* module/ice-9/psyntax.scm (chi-macro): Instead of assuming that output
of a macro should be scoped relative to the module that was current
when the macro was defined, allow the module information associated
with the syntax object itself to pass through unmolested. Fixes bug
29860.
(datum->syntax): Propagate the module of the identifier through to the
new syntax object, so that datum->syntax preserves module hygiene in
addition to lexical hygiene.
(include, include-from-path): Refactor to plumb though the hygiene
information from the filename instead of the `include', allowing
hygiene from the original caller of include-from-path to propagate
through.
* module/ice-9/psyntax-pp.scm: Regenerated.
* test-suite/tests/syncase.test ("macro-generating macro"): Add test for
bug 29860.
* module/ice-9/psyntax.scm: Revert tracking of the current module while
expanding toplevel sequences. Better to preserve lexical scoping
(relative to the module of the original expression) and allow for @@
to override it.
* module/ice-9/psyntax-pp.scm: Regenerated.
* test-suite/tests/syncase.test: Test module-changing with @@.
* module/ice-9/psyntax-pp.scm: Regenerated.
* module/ice-9/psyntax.scm (chi-top-sequence): Track changes to the
current module. Allows e.g. top-level `define-module' within a begin
to work.
* test-suite/tests/syncase.test ("changes to expansion environment"):
Enable test.
* module/ice-9/psyntax.scm (gen-label, new-mark): Labels and marks need
to be unique across read/write boundaries -- it's not sufficient for
them to simply be unique within a process by virtue of (string #\i)
constructing a new object. This used to mostly work before, because
the collapsing of duplicate constants didn't catch many syntax-object
cases -- but for some reason the attached test case brings out the
problem. So switch to use gensyms. Potentially more costly, but it's
what upstream psyntax does now.
This bug took me fully two days to figure out.
* module/ice-9/psyntax-pp.scm: Regenerated.
* test-suite/tests/syncase.test ("serializable labels and marks"): Add
test case.
I've prepared a patch that adds partial support for tail patterns.
Things like the the SRFI-34 `guard' macro from [0] are supported, but
you still can't combine dotted patterns with tail patterns, e.g.
(syntax-rules (else)
((foo bar ... (else something) . rest)
<TEMPLATE-HERE>))
will *not* work; there's the issue that one can't just transcribe
the implementation of this feature from the latest version of psyntax,
as I've done for non-dotted tail patterns, as it's implemented using a
dotted pattern like the above. Alas!
[0] <http://article.gmane.org/gmane.lisp.guile.devel/9442>
* module/ice-9/psyntax.scm (syntax-case, $sc-dispatch): Add support for
tail patterns, transcribed from the latest psyntax.
* module/ice-9/psyntax-pp.scm: Regenerated.
* test-suite/tests/syncase.test: Add tests for tail patterns.
* module/Makefile.am:
* module/ice-9/boot-9.scm:
* module/ice-9/quasisyntax.scm: Add quasisyntax. Implementation by Andre
van Tonder, patch by Andreas Rottmann.
* test-suite/tests/srfi-10.test: Hack to remove srfi-10's clobbering of
#,.
* test-suite/tests/syncase.test: Add a quasisyntax test.
(Reported by Panicz Maciej Godek.)
* test-suite/tests/syncase.test ("@ works with syncase"): New test.
* ice-9/syncase.scm (guile-macro): When a Guile macro transformer
produces a variable, don't pass it through sc-expand.
* tests/dynamic-scope.test, tests/eval.test,
tests/r5rs_pitfall.test, tests/srfi-17.test, tests/syncase.test:
Wrap tests in module (test-suite test-<file-name without .test>),
following a practice that was used on a couple of files already.
* tests/dynamic-scope.test (exception:duplicate-binding,
exception:bad-binding): New.
* tests/dynamic-scope.test, tests/srfi-17.test, tests/syntax.test:
Execute syntactically wrong tests using eval. With the upcoming
new memoizer this is necessary in order to postpone the syntax
check to the actual evaluation of the syntactically wrong form.
* tests/syntax.test: Added some test cases and modified one test
case.
