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D 2.0 Specific Features

D 2.0 has many substantial language and library enhancements compared with D 1.0. This list does not include bug fixes or changes that were also made to D 1.0. See the D1 to D2 Migration Guide for help in converting source code.

Core Language Changes

opAssign can no longer be overloaded for class objects.
Added pure keyword.
Extended enums to allow declaration of manifest constants.
Added const/immutable structs, classes and interfaces.
Added const and immutable to IsExpressions.
Added typeof(return) type specifier.
Added overloadable unary * operation as opStar().
Full closure support added.
Transformed all of string, wstring, and dstring into immutable definitions
Added Overload Sets for functions and templates.
std.math.sin, cos, tan are now evaluated at compile time if the argument is a constant.
Added C++ interface for ‘plugins’.
Changed result type of IsExpression from int to bool.
Added optional TemplateParameterList to IsExpression.
Added warning when override is omitted.
Added new syntax for string literals (delimited, heredoc, D tokens)
Added __EOF__ token
Added D_Version2 predefined identifier to indicate this is a D version 2.0 compiler
Added .idup property for arrays to create immutable copies.
Added transitive const and immutable.
in parameter storage class now means scope const.
class and struct invariant declarations now must have a ().
Added isSame and compiles to __traits.
Added ForeachRangeStatement

Phobos Library Changes

std.algorithm: new module
std.bitarray: scheduled for deprecation
std.bitmanip: new module with the content of std.bitarray plus the bitfields, FloatRep, and DoubleRep templates
std.contracts: new module
std.conv: Added parse and assumeUnique. Made conv_error a template parameterized on the types being converted. Massive additions.
std.file: added dirEntries.
std.format: Added raw ('r') format specifier for writef*.
std.functional: new module
std.getopt: new module.
std.hiddenfunc: new module
std.math: Made nextafter visible for all floating types. Added approxEqual template.
std.numeric: new module
std.path: Added rel2abs (Linux version only). Added the basename and dirname functions (which alias the less gainful names getBaseName and getDirectoryName)
std.process: Made getpid visible in Linux builds
std.stdio: Added writeln() and write(), writef() can now only accept a format as its first argument. Added optional terminator to readln. Added functions fopen, popen, lines and chunks.
std.string: Added munch function and added function chompPrefix.
std.random: Major addition of engines and distributions.
std.traits: new module
std.typecons: new module
std.variant: new module.
Incorporated many of the Tango GC structural differences (much more to go still).
Overhaul phobos linux.mak and add documentation build logic
Moved next member from Object.Error to Object.Exception
Renamed linux library from libphobos.a to libphobos2.a