hylang/hy 0.14.0 on GitHub

Removals

Single-character "sharp macros" are now "tag macros", which can have longer names
xi from hy.extra.anaphoric is now a tag macro #%
eval is now a function instead of a special form

The compiler now automatically promotes values to Hy model objects as necessary, so you can write (eval `(+ 1 ~n)) instead of (eval `(+ 1 ~(HyInteger n)))
return has been implemented as a special form
Added a form of string literal called "bracket strings" delimited by #[FOO[ and ]FOO], where FOO is customizable
Added support for PEP 492 (async and await) with fn/a, defn/a, with/a, and for/a
Added Python-style unpacking operators #* and #** (e.g., (f #* args #** kwargs))
Added a macro comment
Added EDN #_ syntax to discard the next term
while loops may now contain an else clause, like for loops
#% works on any expression and has a new &kwargs parameter %**
Added a macro doc and a tag macro #doc
get is available as a function
~@ (unquote-splice) form now accepts any false value as empty

Relative imports (PEP 328) are now allowed
Numeric literals are no longer parsed as symbols when followed by a dot and a symbol
Hy now respects the environment variable PYTHONDONTWRITEBYTECODE
String literals should no longer be interpreted as special forms or macros
Tag macros (née sharp macros) whose names begin with ! are no longer mistaken for shebang lines
Fixed a bug where REPL history wasn't saved if you quit the REPL with (quit) or (exit)
exec now works under Python 2
No TypeError from multi-arity defn returning values evaluating to None
try forms are now possible in defmacro and deftag
Multiple expressions are now allowed in try
Fixed a crash when macroexpand\ing a macro with a named import
Fixed a crash when with suppresses an exception. with now returns None in this case.
Fixed a crash when --repl-output-fn raises an exception
Fixed a crash when HyTypeError was raised with objects that had no source position
assoc now evaluates its arguments only once each
Multiple expressions are now allowed in the else clause of a for loop
else clauses in for and while are recognized more reliably
Statements in the condition of a while loop are repeated properly
Argument destructuring no longer interferes with function docstrings
Nullary yield-from is now a syntax error
break and continue now raise an error when given arguments instead of silently ignoring them

read, read_str, and eval are exposed and documented as top-level functions in the hy module
An experimental let macro has been added to hy.contrib.walk