Released Version 3.6.2
This release adds support for nested quasi-quotation forms, which now respect depth level. This was done by replacing the quasi-quotation special form with a macro based on the one from chibi scheme. A nice side-benefit is that by removing the special forms, quasi-quotation now works in the compiler.
SRFI 2 (and-let*) support is added as well. From the SRFI document:
Like an ordinary AND, an AND-LET* special form evaluates its arguments - expressions - one after another in order, until the first one that yields #f. Unlike AND, however, a non-#f result of one expression can be bound to a fresh variable and used in the subsequent expressions. AND-LET* is a cross-breed between LET* and AND.
And this release also adds support for environment specifiers, including the following functions:
(interaction-environment)(current-environment)(make-environment)(null-environment version)(load filename environment-specifier)(eval expression environment-specifier)
This release also includes the following bug fixes:
- Fixed a bug where nested explicit renaming macros may not always expand properly.
- Unfortunately, the storage model changes introduced in 3.6 cause problems with hash table literals defined using the
#hash()syntax. For now, hash table literals have been removed to prevent further problems. This feature may be added back in the future. - Fixed the code for
require-extensionto allow passing multiple SRFI numbers in the same call. For example:(require-extension (srfi 1 2)). - Improved compiler support by diverting renamed variables back into the enclosing environment. Such variables would previously throw a runtime error when accessed by the compiled program.
- Improved compiler support by loading macros defined using
define-syntaxso they are available at runtime.