Clean up NEWS
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NEWS.rst
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NEWS.rst
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.. default-role:: code
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Unreleased
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0.15.0
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==============================
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Removals
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------------------------------
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* Dotted lists, `HyCons`, `cons`, `cons?`, and `list*` have been removed.
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These were redundant with Python's built-in data structures and Hy's most
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common model types (`HyExpression`, `HyList`, etc.).
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* Dotted lists, `HyCons`, `cons`, `cons?`, and `list*` have been
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removed. These were redundant with Python's built-in data structures
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and Hy's most common model types (`HyExpression`, `HyList`, etc.).
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* `&key` is no longer special in lambda lists. Use `&optional` instead.
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* Tuple unpacking is no longer built into special forms for function
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definition (`fn` etc.)
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* Macros `ap-pipe` and `ap-compose` have been removed.
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Anaphoric macros do not work well with point-free style programming,
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in which case both threading macros and `comp` are more adequate.
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* Lambda lists can no longer unpack tuples.
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* `ap-pipe` and `ap-compose` have been removed. Use threading macros and
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`comp` instead.
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* `for/a` has been removed. Use `(for [:async ...] ...)` instead.
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* `(except)` is no longer allowed. Use `(except [])` instead.
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* `(import [foo])` is no longer allowed. Use `(import foo)` instead.
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Other Breaking Changes
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------------------------------
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@ -22,58 +22,57 @@ Other Breaking Changes
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This means you can no longer use alternative punctuation in place of
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square brackets in special forms (e.g. `(fn (x) ...)` instead of
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the standard `(fn [x] ...)`).
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* Mangling rules have been overhauled, such that mangled names
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are always legal Python identifiers
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* `_` and `-` are now equivalent even as single-character names
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* Mangling rules have been overhauled; now, mangled names are
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always legal Python identifiers.
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* `_` and `-` are now equivalent, even as single-character names.
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* The REPL history variable `_` is now `*1`
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* The REPL history variable `_` is now `*1`.
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* Non-shadow unary `=`, `is`, `<`, etc. now evaluate their argument
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instead of ignoring it. This change increases consistency a bit
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and makes accidental unary uses easier to notice.
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instead of ignoring it.
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* `list-comp`, `set-comp`, `dict-comp`, and `genexpr` have been replaced
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by `lfor`, `sfor`, `dfor`, and `gfor`, respectively, which use a new
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syntax and have additional features. All Python comprehensions can now
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be written in Hy.
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* `hy-repr` uses registered functions instead of methods
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* `HyKeyword` no longer inherits from the string type and has been
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made into its own object type.
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* `HySymbol` no longer inherits from `HyString`.
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* `(except)` is no longer allowed. Use `(except [])` instead.
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* `(import [foo])` is no longer allowed. Use `(import foo)` instead.
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* `&`-parameters in lambda lists must now appear in the same order that
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Python expects.
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* Literal keywords now evaluate to themselves, and `HyKeyword` no longer
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inherits from a Python string type
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* `HySymbol` no longer inherits from `HyString`.
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New Features
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------------------------------
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* Python 3.7 is now supported
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* Added `mangle` and `unmangle` as core functions
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* More REPL history result variables: `*2`, `*3`. Added last REPL error
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variable: `*e`
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* `defclass` in Python 3 now supports specifying metaclasses and other
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keyword arguments
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* Added a command-line option `-E` per CPython
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* `while` and `for` are allowed to have empty bodies
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* `for` supports the various new clause types offered by `lfor`
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* Added a new module ``hy.model_patterns``
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* `defmacro!` now allows optional args
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* Python 3.7 is now supported.
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* `while` and `for` are allowed to have empty bodies.
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* `for` supports the various new clause types offered by `lfor`.
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* `defclass` in Python 3 supports specifying metaclasses and other
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keyword arguments.
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* Added `mangle` and `unmangle` as core functions.
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* Added more REPL history variables: `*2` and `*3`.
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* Added a REPL variable holding the last exception: `*e`.
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* Added a command-line option `-E` per CPython.
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* Added a new module `hy.model_patterns`.
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Bug Fixes
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------------------------------
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* `hy2py` should now output legal Python code equivalent to the input Hy
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code in all cases, modulo some outstanding bugs in `astor`
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* Fix `(return)` so it works correctly to exit a Python 2 generator
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* Fixed a case where `->` and `->>` duplicated an argument
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* Fixed bugs that caused `defclass` to drop statements or crash
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* Fixed a REPL crash caused by illegle unicode escape string inputs
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* `NaN` can no longer create an infinite loop during macro-expansion
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* Fixed a bug that caused `try` to drop expressions
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* Fixed a bug where the compiler didn't properly compile `unquote-splice`
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* Trying to import a dotted name is now a syntax error, as in Python
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code in all cases.
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* Fixed `(return)` so it can exit a Python 2 generator.
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* Fixed a case where `->` and `->>` duplicated an argument.
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* Fixed bugs that caused `defclass` to drop statements or crash.
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* Fixed a REPL crash caused by illegal backslash escapes.
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* `NaN` can no longer create an infinite loop during macro-expansion.
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* Fixed a bug that caused `try` to drop expressions.
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* The compiler now properly recognizes `unquote-splice`.
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* Trying to import a dotted name is now a syntax error, as in Python.
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* `defmacro!` now allows optional arguments.
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* Fixed handling of variables that are bound multiple times in a single
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`let`.
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Misc. Improvements
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----------------------------
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* `hy-repr` supports more standard types
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* `hy-repr` uses registered functions instead of methods.
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* `hy-repr` supports more standard types.
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0.14.0
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==============================
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