Umka 0.8

• Built-in maps (map.um is deprecated)
• Module aliases
• Unused identifier/unused import warnings
• Sandbox mode (disables accessing the file system and/or UMIs)
• Bug fixes

Umka 0.7

• Variadic functions
• Default parameters of structured types
• Implicit interface-to-concrete conversions are no longer allowed
• Null strings are equivalent to empty strings
• fiber is now a pointer; ^fiber is no longer needed
• Dynamic arrays are now accessible through the C API (read only)
• valid() checks if a dynamic array, interface or function variable is not null
• Improved garbage collection for long lists
• Web-based playground
• Bug fixes

Umka 0.6

• Stricter equivalence rules for declared types
• Equivalence rules for functions no longer require parameter names to match
• Interfaces can be converted back to non-pointer types
• Pointers to pointers cannot be stored in interfaces
• All structures have natural alignment
• Support for sizeof(T) and std.system(command)
• Storing pointers as void * rather than int64_t in VM stack
• Static storage size is no longer required in umkaInit()
• Bug fixes
• Tested on 32-bit PowerPC and SPARC

Umka 0.5.3

• Limited UTF-8 support
• Improved hash maps
• String trimming functions
• Standard library module embedded into the executable file
• Bug fixes

Umka 0.5.2

• Constant lists as enumerations
• Stack trace output on runtime errors
• Reordered command-line options
• Bug fixes

Umka 0.5.1

• More consistent type casts
• Stricter rules for method receiver types
• slice() for strings
• Loading modules from string buffers
• -check command-line option
• Bug fixes

Umka 0.5

• Improved memory safety
• Virtual machine optimizations
• Maps
• slice(), clock(), getenv()
• Bug fixes

Umka 0.4.1

• Automatic linking of native shared libraries that implement external functions
• Safe weak pointers
• Interfaces are no longer allowed as method receivers
• Partially initialized structure literals
• Bug fixes

Umka 0.4

• API change: Script source can be loaded from a string buffer
• Composite literal address can be safely returned from a function
• Bug fixes

Umka 0.3.4

• Safer I/O
• Extensible interface type
• Dynamic array literals
• More flexible append()
• Language specification