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# Version History
## v1.0
- List indexing now gives an optional value
## v0.3
- Added a versioning system based on `CHANGES.md` files and `modules.ini`
configuration for module aliases.
- When attempting to run a program with a module that is not installed, Tomo
can prompt the user to automatically install it.
- Programs can use `--version` as a CLI flag to print a Tomo program's version
number and exit.
- Significant improvements to type inference to allow more expressions to be
compiled into known types in a less verbose manner. For example:
```tomo
enum NumberOrText(Number(n:Num), SomeText(text:Text))
func needs_number_or_text(n:NumberOrText)
>> n
func main()
needs_number_or_text(123)
needs_number_or_text(123.5)
needs_number_or_text("Hello")
```
- Added `tomo --prefix` to print the Tomo install prefix.
- Sets now support infix operations for `and`, `or`, `xor`, and `-`.
- Added new `json` module for JSON parsing and encoding.
- Added `Path.sibling()`.
- Added `Path.has_extension()`.
- Added `Table.with_fallback()`.
- Added `Int*.get_bit()` and `Byte.get_bit()`.
- Added `Byte.parse()` to parse bytes from text.
- Added optional `remainder` parameter to `parse()` methods, which (if
non-none) receives the remaining text after the match. If `none`, the match
will fail unless it consumes the whole text.
- Added optional `remainder` parameter to `Text.starts_with()` and
`Text.ends_with()` to allow you to get the rest of the text without two
function calls.
- Improved space efficiency of Text that contains non-ASCII codepoints.
- Doctests now use equality checking instead of converting to text.
- Fixed the following bugs:
- Negative integers weren't converting to text properly.
- Mutation of a collection during iteration was violating value semantics.
- `extend` statements weren't properly checking that the type name was valid.
- Lazy recompilation wasn't happening when `use ./foo.c` was used for local
C/assembly files or their `#include`s.
- Memory offsets for enums with different member alignments were miscalculated.
- Optional types with trailing padding were not correctly being detected as `none`
- Tomo identifiers that happened to coincide with C keywords were not allowed.
- Compatibility issues caused compilation failure on some platforms.
## v0.2
- Improved compatibility on different platforms.
- Switched to use a per-file unique ID suffix instead of renaming symbols after
compilation with `objcopy`.
- Installation process now sets user permissions as needed, which fixes an
issue where a user not in the sudoers file couldn't install even to a local
directory.
- Fixed some bugs with Table and Text hashing.
- Various other bugfixes and internal optimizations.
## v0.1
First version to get a version number.
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