RELEASE-0.6.md

0.6 Changes

The Alternative type class hierarchy was refactored. See here.
--runtime-type-checks has been removed. The recommended approach is to use purescript-foreign. (@garyb)
The Unit type is now used in the Prelude and core libraries to represent values containing no data. (@garyb)
The Prelude is no longer distributed as a separate file, but is embedded in the compiler executables. (@paf31)

Newtypes are now supported using the newtype keyword. The runtime representation of a newtype is identical to that of the contained type. (@garyb)
Multiline string literals are now supported via triple-quote syntax, making FFI declarations much neater. (@phadej)
Kind signatures on types and type constructor arguments are now supported. (@paf31)

The runFnN and mkFnN families of functions are now inlined by the optimizer, making interop with JavaScript functions of multiple arguments much simpler. (@paf31)
Tail call optimization has been improved for functions using case expressions. (@paf31)
Saturated calls to data constructors are now optimized. (@garyb)
A new Renamer module now renames identifiers which shadow other names in scope, which greatly simplies code generation. (@garyb)
psci now provides the following new options:
- :b to browse a module (@ardumont)
- :s to show current imports or modules (@ardumont)
- :k to find the kind of a type constructor (@5outh)
The approach to checking whether a name is initialized in the generated JavaScript was simplified (@paf31)
The dependency on the PureScript_paths module has been removed, which makes distribution via binaries simpler. (@paf31)
Nested if blocks now get optimized. (@garyb)
Generated code for type class dictionaries was simplified. (@garyb, @dylex)
The code generator now inserts the version of psc into the file as a comment. (@co-dh)
() is now valid syntax, referring to the empty row. (@paf31)
The type checker will now display multiple errors for type errors in the same binding group. (@paf31)
Imports can now specify hidden names using import ... hiding ( ... ) (@andreypopp)

Binding group errors in type class members are now caught at compile time. (@dylex)
Some errors related to type checking rows with duplicate labels were fixed. (@paf31)
Some issues with the calculation of binding groups were fixed. (@paf31)
Error messages for invalid case declarations are now generated. (@natefaubion)
Some issues related to module exports were fixed. (@garyb)
psci now checks imports for validity. (@Bogdanp)

The PureScript book is now available.
The PureScript wiki is now the main resource for compiler and library documentation.