Lily is a programming language focused on expressiveness and type safety.
scoped enum Color { Black, Blue, Cyan, Green, Magenta, Red, White, Yellow }
class Terminal(public var @foreground: Color, width_str: String)
{
public var @width = width_str.parse_i().unwrap_or(80)
public define set_fg(new_color: Color) {
@foreground = new_color
}
}
var terms = [Terminal(Color.White, "A"), Terminal(Color.Red, "40")]
terms.each(|e| e.width += 20 )
|> print
By default, Lily runs in standalone mode where all content is code to
execute. But Lily can also be run in template mode. In template mode,
code is between <?lily ... ?> tags. When a file is imported, it's always
loaded in standalone mode, so that it doesn't accidentally send headers.
Files that are imported are also namespaced (no 'global namespace').
Lily may be a statically-typed language, but the reference implementation is an interpreter. The interpreter as well as its API have been carefully designed with sandboxing in mind. As a result, it's possible to have multiple interpreters exist alongside each other.
Another benefit from having the reference implementation as an interpreter is a shorter turn around time. The interpreter's parser is comparable in speed to that of languages using an interpreter as their reference.
You need a C compiler and CMake (3.0.0 +). There are no external dependencies.
To build Lily, execute the following in a terminal:
cmake .
make
Note: Windows users may need to add -G"Unix Makefiles" to the end of the cmake
invocation.
The above will build the lily executable, as well as a liblily that you can
use with your program. It also builds pre-commit-tests.
The centerpiece of Lily's testing is test_main.lily in the test directory.
That file imports and invokes a large number of tests that cover a lot of Lily.
The make command also builds covlib and pre-commit-tests. No additional
commands are necessary. covlib is a library that tests some parts of Lily that
native code can't test. pre-commit-tests is a special runner that executes
test_main.lily.
To run Lily's tests, execute pre-commit-tests from the directory it's in after
building Lily.
The lily-garden repository contains a package manager (Garden) that simplifies the install of Lily packages.