* module/ice-9/psyntax.scm (case-lambda, case-lambda*): Allow a
docstring to be placed immediately after the 'case-lambda' or
'case-lambda*'.
* module/ice-9/psyntax-pp.scm: Regenerate.
* doc/ref/api-procedures.texi (Case-lambda): Update docs.
* test-suite/tests/optargs.test ("case-lambda", "case-lambda*"):
Add tests.
* libguile/filesys.c (scm_system_file_name_convention): New function.
Exported to Scheme only.
* module/ice-9/boot-9.scm (file-name-separator?, absolute-file-name?):
New predicates.
(file-name-separator-string): New global variable.
(in-vicinity): Use the new procedures.
(load-user-init, try-module-autoload): Use file-name-separator-string.
(load-in-vicinity): Update canonical->suffix. Consistently use the
term "file name" throughout.
* module/ice-9/psyntax.scm (include): Use global `absolute-file-name?'.
* module/ice-9/psyntax-pp.scm: Regenerate.
* module/ice-9/psyntax.scm (expand-body): As required by R6RS, evaluate
the right-hand-sides of internal 'define-syntax' forms and add their
transformers to the compile-time environment immediately, so that the
newly-defined keywords may be used in definition context within the
same lexical contour. Fixes#13509.
* module/ice-9/psyntax.scm (expand-body): Apply source-annotation to an
expression, not to the expression's compile-time environment.
* module/ice-9/psyntax-pp.scm: Regenerate.
* module/ice-9/psyntax.scm (@): Return top-wrap instead of the wrap
applied to the '@' form, so that the symbol will be interpreted as a
top-level identifier and never refer to any lexical variable.
(@@): Change the syntax used to support R6RS 'library' forms to:
(@@ @@ (mod ...) body). Change the behavior of the documented
(@@ (mod ...) id) form to be the same as that of @, except for the use
of 'private' instead of 'public' in the psyntax mod: use syntax->datum
on the identifier, and return top-wrap instead of the wrap applied to
the '@@' form.
This fixes <http://bugs.gnu.org/10756> reported by Ludovic Courtès.
* module/ice-9/psyntax-pp.scm: Regenerate.
* module/ice-9/r6rs-libraries.scm (library): Use '@@ @@' syntax instead
of the older '@@' syntax.
* test-suite/tests/syncase.test (changes to expansion environment): Use
'@@ @@' syntax.
* module/Makefile.am: Add explicit dependencies for boot-9.go on the
files that it includes: quasisyntax.scm and r6rs-libraries.scm.
* module/ice-9/psyntax.scm (do, case): Comment out these definitions,
which are never used and immediately replaced by definitions in
boot-9.scm.
* module/ice-9/psyntax-pp.scm: Regenerate.
* module/ice-9/compile-psyntax.scm: Minimize syntax object literals
embedded in psyntax-pp.scm.
* module/ice-9/psyntax.scm: Rename a few variables so that syntax
objects embedded in macros have no lexical bindings, so that their
minimized syntax objects will have no embedded labels. These labels
were the last remaining gensym counters in psyntax-pp.scm.
* module/ice-9/psyntax-pp.scm: Regenerate. It is now less than one
quarter of its previous size! More importantly, this file no longer
contains any gensym counters, which means that in the future, local
changes to psyntax.scm will usually result in only local changes to
psyntax-pp.scm.
* module/language/tree-il.scm (tree-il->scheme): New implementation that
simply calls 'decompile-tree-il'.
* module/language/scheme/decompile-tree-il.scm (choose-output-names,
do-decompile): New internal procedures.
(decompile-tree-il): New and improved implementation. Print source
identifiers where possible, otherwise add minimal numeric suffixes.
Previously we printed the gensyms. Avoid 'begin' in contexts that
provide an implicit 'begin'. Produce 'cond', 'case', 'and', 'or',
'let*', named let, and internal defines where appropriate. Recognize
keyword arguments in 'opts' to disable the production of these derived
syntactic forms, and to optionally strip numeric suffixes from
variable names.
* module/ice-9/compile-psyntax.scm: Disable partial evaluation, letrec
fixing, and primitive expansion when producing psyntax-pp.scm, in
order to produce output as close to the original source as practical.
Disable production of derived syntactic forms as needed during
bootstrap. Strip numeric suffixes from variable names. Adjust
pretty-printing parameters.
* module/ice-9/psyntax-pp.scm: Regenerate. It is now less than half
of the original size.
* module/ice-9/psyntax.scm (decorate-source): Set source properties on
any object that satisfies 'supports-source-properties?'. Previously
we used 'pair?' as the predicate.
(source-annotation): Apply 'source-properties' to _any_ kind of source
expression, where previously only pairs were queried. If the argument
is a syntax-object, apply the source-properties to the syntax-object's
expression.
In the peculiar case of a syntax-object whose expression is also a
syntax-object: previously we would iterate, but with this commit we
now call 'syntax-object-expression' only once.
* module/ice-9/psyntax-pp.scm: Regenerate.
* module/ice-9/psyntax.scm (syntax-violation): Look for source
properties of 'subform' first. If 'subform' has none, 'form' is used.
Previously, the source information of 'form' was used unless 'form'
_itself_ was '#f', in which case 'subform' was used.
* module/ice-9/psyntax-pp.scm: Regenerate.
* module/ice-9/psyntax.scm (rebuild-macro-output): Fix two bugs that
would cause bogus source properties to be added to vectors and
macro-introduced syntax objects. These bugs were masked by the
limitation that only pairs can be decorated with source properties.
Due to a typo, each vector in the macro output was decorated using the
vector itself as its source. Due to accidental variable capture, each
syntax-object introduced by the macro had its expression decorated
with its own wrap-subst.
* module/ice-9/psyntax-pp.scm: Regenerate.
* module/ice-9/psyntax.scm (syntax-type): Return an additional value
that contains the entire form in _all_ cases, including for definition
forms. Previously, the entire form was not returned for definition
forms.
(expand-expr): Add an additional argument that contains the entire
form in _all_ cases, including for definition forms. Use it to
include the entire form in error messages, notably for definitions in
expression context. Include the source location information, which
was previously missing from these errors when the rhs expression was
an atom. Improve the "definition in expression context" error message
to be more comprehensible for Scheme beginners.
(expand-top-sequence, expand, expand-body): Adjust as needed to handle
the additional return value from 'syntax-type' and the additional
argument to 'expand-expr'.
* module/ice-9/psyntax-pp.scm: Regenerate.
* NEWS: Update.
* module/language/tree-il/peval.scm (peval):
* module/language/tree-il/primitives.scm (dynamic-wind): When you make a
gensym that just has to be compared against other gensyms, it will be
unique if the prefix doesn't end in something that can be interpreted
as a number. There's no reason to make that character something
difficult like " ". So change to use a dash in that case.
* module/ice-9/psyntax-pp.scm: Regenerate. More readable now.
* libguile/macros.c (scm_init_macros): Add definition of new
syntax-session-id helper.
* module/ice-9/psyntax.scm: Capture a reference to syntax-session-id at
boot time. Uniquify marks and labels using the session id.
* module/ice-9/boot-9.scm: Shunt syntax-session-id off to (system
syntax) once we finished booting.
* module/ice-9/compile-psyntax.scm: Override syntax-session-id when
remaking psyntax to avoid spurious diffs.
* module/ice-9/psyntax-pp.scm: Regenerate.
* module/ice-9/boot-9.scm:
* module/ice-9/psyntax.scm (syntax-module, syntax-local-binding)
(syntax-locally-bound-identifiers): After boot, move these definitions
to a new (system syntax) module.
* module/ice-9/psyntax-pp.scm: Regenerate.
* doc/ref/api-macros.texi: Add some words about syntax-module and
friends being in (system syntax).
* module/ice-9/boot-9.scm (syntax-local-binding): New binding.
* module/ice-9/psyntax.scm: Locally define a fluid that holds the
"transformer environment". with-transformer-environment calls a
procedure with the transformer environment, or raises an error if
called outside the extent of a transformer. Bind
transformer-environment in expand-macro.
(resolve-identifier): Backport this helper from master.
(syntax-local-binding): New procedure to return binding information of
a bound identifier (a lexical, macro, a pattern variable, a displaced
lexical, a global, or some other form).
* module/ice-9/psyntax-pp.scm: Regenerate.
* doc/ref/api-macros.texi (Syntax Transformer Helpers): Add docs for
syntax-local-binding, and syntax-source, and move some other
descriptions to this new section.
* doc/ref/api-control.texi (begin): Update to distinguish between
splicing begin and sequencing begin.
* module/ice-9/psyntax.scm (expand-expr): Add a back-compatibility shim
for `(begin)'.
* module/ice-9/psyntax-pp.scm: Regenerate.
* test-suite/tests/syntax.test: Update to run illegal (begin) test only
if we are not including deprecated features.
* module/ice-9/psyntax.scm: Rename expand-when-list to parse-when-list,
and simplify to compare literal values.
* module/ice-9/psyntax-pp.scm: Regenerate.
* module/ice-9/psyntax.scm: Rename all instances of "chi" to "expand".
Addded a hack to expand-eval-when that will be fixed later.
* module/ice-9/psyntax-pp.scm: Regenerated.
* module/ice-9/compile-psyntax.scm (source): Canonicalize after
optimizing. The optimizer should be a little more clever, but
currently fix-letrec outputs some non-canonical forms.
* module/ice-9/psyntax-pp.scm: Regenerate.
* module/ice-9/psyntax.scm (define-syntax-rule): Add this new helper
macro, to define a syntax-rules macro with one clause.
* module/ice-9/psyntax-pp.scm: Regenerate.
* module/ice-9/psyntax.scm (syntax-case): enabled the use of a
general last cdr instead of just '() in matching with both
a ellipsis (p ...) and a last rest pattern (. q)
* module/ice-9/psyntax-pp.scm: Regenerated.
* module/ice-9/psyntax.scm (generate-temporaries): Give temporaries the
current module, so that they may be bound at the top level.
* module/ice-9/psyntax-pp.scm: Regenerate.
* module/ice-9/psyntax.scm (fx+, fx-, fx=, fx<): Given our lame lack of
an inliner, inline these manually with identifier syntax.
* module/ice-9/psyntax-pp.scm: Regenerate.
* 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 (quasiquote): Import new definition from
upstream psyntax, to allow unquote and unquote-splicing to take
multiple arguments.
(unquote, unquote-splicing): Adapt to not require a particular syntax
form.
* module/ice-9/psyntax-pp.scm: Regenerated.
* module/ice-9/psyntax.scm (chi-top): When adding to the toplevel
environment at compile-time, default to undefined variables, not
variables defined to #f.
* module/ice-9/psyntax-pp.scm: Regenerate.
* module/ice-9/boot-9.scm (module-add!): Add a new pre-modules version
of this function, so we can add variables the environment, not just
values.
(module-define!): Use module-add!.
* module/ice-9/psyntax.scm (syntax-violation): Use lambda* for subform
arg. Instead of using scm-error, just throw to 'syntax-error with all
we got.
* module/ice-9/psyntax-pp.scm (#{and-map*\ 37}): Regenerated.
* 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.
