A compiler that translates Venus files into Lua. Written in Lua.
The compiler reads a Venus file and replaces Venus syntax by Lua syntax.
It can also load and run the result.
The foreach
statement will geneate a pairs
statement.
local table = {2,1,3,"test"}
foreach el in table {
print(el)
}
will generate:
local table = {2,1,3,"test"}
for _, el in table do
print(el)
end
For comments --
and ##
can be used
If something follows a --
it will always be treated as comment
fn
can be used instead of function
.
fn test() {
print("hi")
}
will generate
function test()
print("hi")
end
The do
,then
and end
statements can be replaced by curly braces syntax.
They can be used in functions, loops, conditions, etcetera.
For example:
do {
local table = {2,1,3,"test","test2",3}
fn findTest(t) {
repeat {
local found = false
local el = table.remove(t)
if el == "test" {
found = true
} else {
print(el)
}
} until found
}
}
will generate:
do
local table = {2,1,3,"test","test2",3}
function findTest(t)
repeat
local found = false
local el = table.remove(t)
if el == "test" then
found = true
else
print(el)
end
until found
end
end
Lambda syntax (args) => {...}
can be used to create anonymous functions.
local result
fn store_it(f) {
result = f(10,6)
}
store_it((a,b) => {
return (a - b) * 2
})
will generate:
local result
function store_it(f)
result = f(10,6)
end
store_it(function(a,b)
return (a - b) * 2
end)
++
and --
can be used to add/sub by 1
local i = 0
local j = 0
i++
j--
will generate:
local i = 0
local j = 0
i = i + 1
j = j - 1
Assignment operators +=
, -=
, *=
, /=
, ^=
and .=
can be used for math on variables.
local a = 0
-- Increased by
a += 2
## Decreased by
a -= 1
## Multiplied by
a *= 8
-- Divided by
a /= 2
-- Powered by
a ^= 3
## Concatenate string
a .= " str"
will generate
local a = 0
-- Increased by
a = a + 2
-- Decreased by
a = a - 1
-- Multiplied by
a = a * 8
-- Divided by
a = a / 2
-- Powered by
a = a ^ 3
-- Concatenate string
a = a .. " str"
The init.lua returns a function for loading the compiler.
You have to call it with the path to the script itself as argument.
In case you have the LuaVenusCompiler directory within your project's
ways of loding it may be:
--in case your project is run within it's own folder
local vc = dofile("LuaVenusCompiler/init.lua")("LuaVenusCompiler/")
--in case you have a variable called project_loc containing the path to your projects folder
local vc = dofile(project_loc.."/LuaVenusCompiler/init.lua")(project_loc.."/LuaVenusCompiler/")
--using require
local vc = require("LuaVenusCompiler")("LuaVenusCompiler/")
When it is loaded it can also be accessed with the global called "LuaVenusCompiler".
vc.dovenus(file)
works like dofile(file)
It's argument can be a relative or absolute path to the file that should be run.
vc.loadvenus(file)
works like loadfile(file)
It's argument can be a relative or absolute path to the file that should be loaded.
It returns a function that runs the generated lua.
vc.tl_venus_file(file)
returns the lua generated from the files contents
It's argument can be a relative or absolute path to the file that should be translated.
It returns the generated lua as string.
vc.tl_venus_string(str)
returns the lua generated from the given string
It returns the generated lua as string.
vc.convert_venus_file(venus_file_in,lua_file_out)
generates a lua file
It's arguments can be relative or absolute paths.
The venus_file_in will be converted to lua and written to lua_file_out.