# Revision history for zeolite-lang
## 0.7.0.2 -- 2020-05-21
### Language
* **[fix]** Improves the likelihood of successful type inference when unions,
intersections, or filters are combined with inheritance and type nesting.
## 0.7.0.1 -- 2020-05-20
### Language
* **[fix]** Fixes an edge-case where type-inference can be influenced by a
param filter for a param with the same name in the scope that is calling the
function. (For example, having `#x requires Foo` in scope while calling a
function that also happens to have a param named `#x`.)
* **[fix]** Fixes an edge-case where parameter substitution at the type level
can clash with a type parameter scoped to a function. (Related to the above,
but actually a separate issue discovered while solving the former.)
* **[behavior]** Shows inferred-type assignments in error messages related to
expressions containing inferred types.
## 0.7.0.0 -- 2020-05-19
### Language
* **[new]** Adds limited inference of type parameters in function calls. The new
syntax is `call<?,Int>(foo,bar)`, where `?` designates that inference is
requested for the first position.
* **[behavior]** Reduces the memory cost of `$TraceCreation$` by avoiding
storing the entire trace text.
### Compiler CLI
* **[behavior]** Improves handling of I/O errors when calling `zeolite`, and
allows compilation to continue in `-r`/`-R` modes if compilation of one module
fails.
## 0.6.0.0 -- 2020-05-14
### Compiler CLI
* **[behavior]** Improves error messages for type mismatches and return-count
mismatches.
* **[behavior]** Improves the efficiency of loading metadata for dependencies.
* **[breaking]** Fixes module-staleness check when running tests (`-t`).
* **[breaking]** Prevents binaries from being created from main categories that
are defined in `$TestsOnly$` sources. (This was the original intention, but it
was missed the first time around.)
### Language
* **[new]** Allows `@category` members in `concrete` categories to refer to each
other during initialization.
* **[new]** Adds the `$ExprLookup[`*`MACRO_NAME`*`]$` pragma, which allows the
user to define expression substitutions in `.zeolite-module`.
* **[new]** Adds the `$NoTrace$` pragma, which skips generating stack-trace
information for specific functions. This is useful for deeply-recursive
functions whose full trace would not be useful.
* **[new]** Adds the `$TraceCreation$` pragma, which appends a trace for the
creation of a value when there is a crash in one of its functions. This is
useful when the crash stems from value initialization.
* **[fix]** Fixes parsing of the `'"'` `Char`-literal.
### Libraries
* **[new]** Adds the `ErrorOr<#x>` category to `lib/util`. This allows functions
to return either the expected type or an error message.
* **[new]** Adds the `Void` category to `lib/util`. This can be used to ignore
type parameters when a value still needs to be instantiated.
* **[new]** Adds the `readAll` function to `TextReader` (in `lib/util`) to
support reading an entire file at once.
* **[breaking]** Adds crashes when attempting to read `RawFileReader` or write
`RawFileWriter` if there is a preexisting file error.
## 0.5.0.0 -- 2020-05-12
* **[new]** Adds compiler support for pragmas, which will allow compiler
features that aren't a part of the language:
- **[new]** `$ModuleOnly$` pragma for `.0rp` files, which limits their
visibility to the modules that own them.
- **[new]** `$TestsOnly$` pragma for `.0rp` files, which limits their
visibility to `.0rt` files, and `.0rx` files that also use `$TestsOnly$`.
* **[new]** Adds support for global seach paths for dependencies via a
plain-text file at `$(zeolite --get-path)/global-paths`. This can be used to
set up a separate directory for general-use Zeolite modules.
* **[breaking]** Better handling of symbols from dependencies. This might break
code that inavertently relied on broken visibility. In particular, `..` in a
dependency path precludes it from resolving to a system module.
## 0.4.1.0 -- 2020-05-05
* **[new]** Adds a compiler mode (`--show-deps`) to display the symbolic
dependencies of a module.
* **[new]** Adds a compiler mode (`--fast`) to quickly compile a binary from a
single source file without needing to create a module.
* **[new]** Adds a compiler mode (`-R`) to recursively recompile modules.
* **[new]** Improves thread-safety of internal code so that thread support can
be safely added later. (Probably via a library.)
* **[new]** Adds the `Builder` interface to make `String` concatenation more
efficient.
* **[new]** Adds support for basic mathematical `Float` operations, such as
`sin`, `exp`, and `sqrt`.
* **[new]** Adds support for bitwise `Int` operations.
* **[fix]** Fixes broken `--templates` mode when builtin types are used.
## 0.4.0.0 -- 2020-05-05
* **[new]** Allows modules to specify custom linker flags and private include
paths in `.zeolite-module`. This lets categories written in C++ depend on
external libraries written in other languages.
* **[behavior]** Adds optimization of dependency inclusion for categories that
are defined in C++ sources. This should eliminate linking in object files that
are not needed by the binary.
* **[behavior]** Adds checks to prevent a module from defining a category that
was declared in another module.
* **[breaking]** Updates the `.zeolite-module` format to require associating
externally-defined categories with the source files that define them. This
allows finer-grained linking of binaries and tests.
## 0.3.0.0 -- 2020-05-03
* **[breaking]** Updates syntax for discarding all returns to use `\` instead of
`~`. This will allow `~` to be used for bitwise-not later on. (Not to mention
that `~` was kind of ugly in that context.)
* **[breaking]** Cleans up multiple-`return` syntax by removing `{}`. This
applies to *both* the `return` and the assignment.
## 0.2.0.0 -- 2020-05-03
* **[breaking]** Requires that `concrete` categories defined in `.cpp` files be
listed as `external` in `.zeolite-module`. This allows the compiler to ensure
that all categories have a definition, which helps avoid linker errors.
* **[breaking]** Gives `.zeolite-module` configs a proper file format.
* **[new]** Adds version checking to cached module data.
## 0.1.3.0 -- 2020-05-01
* **[new]** Adds support for more versions of GHC.
## 0.1.2.0 -- 2020-04-28
* **[fix]** Fixes a parser issue with empty `{}` blocks following `scoped`.
* **[behavior]** Updates `cleanup` procedures to allow setting named-return
values. Previously, initializing a named return in `cleanup` was not
sufficient.
* **[behavior]** Updates `zeolite-setup` to unconditionally rebuild supporting
libraries. Incidentally, this causes all existing user modules to be out of
date.
## 0.1.1.0 -- 2020-04-27
* **[behavior]** Set the default output path for binaries to the module's path
rather than the current directory.
* **[new]** Allows a base path (`-p`) with recompile mode (`-r`).
## 0.1.0.0 -- 2020-04-27
* First version. Released on an unsuspecting world.