Pass a string to the handler to describe the problem.
Also, fix minor issues (GC registration, contracts and `history`
in docs) and make `pregexp`, etc., report compilation errors as
`pregexp`, etc.
`->i` already supports method contracts (for use wihin `object-contract`,
whose `->i` support is tested, but undocumented), which would make `->im`
possible.
Unfortunately, that support is very incomplete, missing support for using
`this` in contracts, making this `->im` (or the undocumented `->i` +
`object-contract` combo) basically useless.
Once/if that is added, then this commit would enable `->im`. Until then,
it's mostly useful for future reference (hence will be reverted).
In the meantime, it's possible to use `->i` within class/object contracts
with an explicit `this` argument, so nothing critical is lost, just a tiny
shortcut.
A syntax property is added as preserved or not. For backward
compatibility, the default for a 'paren-shape key is preserved, and
any other key's default is non-preserved.
Compute an `equal?` hash code for `read`able values that
is a constant, at least for a given version of Racket. Only
(interned) symbols failed to have that property before.
On Unix and OS X, the check to avoid replacing an existing
file or directory is made by Racket, rather than the OS,
so don't claim a system error if the operation fails for
that reason.
Also, update the docs to clarify that the check is not
atomic with the move.
Closes issue #1158
Add 'module-body-inside-context, 'module-body-outside-context, and
'module-body-context-simple? properties to the expansion of a
`module` form. These properties expose scopes that are used by
`module->namespace` and taht appear in marshaled bytecode.
The expression in a `define-runtime-path` form is used in
both a run-time context and a compile-time context. The
latter is used for `raco exe`. In a cross-build context,
you might need to load OpenSSL support for Linux (say)
at build time while generating executables that refer to
Windows (say) OpenSSL support. In that case, `#:runtime?-id`
lets you choose between `(cross-system-type)` and
`(system-type)`.
Merge to v6.4
In particular, instead of going directly back to the chaperone, handle
the case where the function doesn't accept keyword arguments with a
less expensive fallback.
The less expensive fallback uses a case-lambda wrapper (wrapped inside
a make-keyword-procedure) to close over the neg-party and avoid the
chaperone creation. With this commit, the program below gets about 3x
faster, and is only about 20% slower than the version that replaces
the "(let ([f f]) ...)" with its body
#lang racket/base
(module m racket/base
(require racket/contract/base)
(provide (contract-out [f (-> integer? integer?)]))
(define (f x) x))
(require 'm)
(collect-garbage)
(time (for ([x (in-range 5000000)]) (let ([f f]) (f 1))))
Thanks, @samth!
Made the hash-set chaperones essentially forward the hash chaperone
operations, but now explain them all in terms of set-based operations
in the docs.
Also adjusted value-blame and has-blame? to support late-neg projections
