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