New release

_posts/2017-04-14-Released-Cyclone-Scheme-0.5.md

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+---
+layout: post
+title: Released Cyclone Scheme 0.5
+excerpt: With interpreter support for loading libraries via `import`, `icyc` can now be used to its full potential.
+---
+
+Features
+
+- Cyclone now has support in the interpreter for loading libraries via `import`. This is probably the most important change in this release and allows `icyc` to be used to its full potential.
+- Store parameter objects in such a way that changes to a parameter object do not affect other threads that use the same parameter object.
+
+    The specific requirement from R<sup>7</sup>RS is:
+
+    > `parameterize` must not change the associated values of any parameters in any thread other than the current thread and threads created inside the `parameterize` body.
+
+- Added bignum support to SRFI 60 - integers as bits.
+- Normalize the result of `string->number` such that bignums are only returned if the result truly is a bignum.
+- Allow Cyclone to find `(cyclone)` prefixed libraries installed in Cyclone's system folder.
+- Allow a library to export identifiers that are exported by another library. Previously a library could only export identifiers that it defined directly.
+- Raise an error if an unknown identifier is found in a library's `export` list.
+- Aric Belsito removed a hardcoded call to `cyclone` from the Makefile when building `generate-c`. Thanks!
+- Allow `cyclone` to inline character comparison functions (`char=?`, etc) when only two arguments are present, for a significant speed improvement.
+
+Bug Fixes
+
+- Prevent exception handlers from being accidentally collected when the collector cooperates on behalf of a mutator.
+- Fixed a regression where `string->number` returns `0` on bad input instead of `#f`.