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Reuh
6b95bfb698
* Implicit returns are now implicit pushes * Candran keywords can be used as variable name * Better handling of continue * Moar newlines in output
92 lines
3.6 KiB
Text
92 lines
3.6 KiB
Text
List of potential ideas.
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To be implemented, theese need to:
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* aesthetically fit into the current Candran/Lua syntax. We can add a few weird glyphs here and there, but our goal *is not* to become a punctuation inventory like MoonScript.
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* vanilla Lua code *must* produce functionaly identical code after going through the Candran compiler, so make sure the additions:
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* are invalid vanilla Lua syntax.
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* are not ambigous with any vanilla Lua syntax.
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* be significantly useful compared to existing Candran/Lua code.
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* be useful without having to rewrite APIs specifically for Candran. Candran intends to make Lua easier, not supersede it.
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Example rejected ideas:
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* Python-style function decorators (implemented in Candran 0.1.0):
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Useless 95% of the time because most Lua APIs applying something to a function are used like applySomething(someArg,func) instead of func=applySomething(someArg)(func).
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This could be adapted, but this will mean unecessary named functions in the environment and it will only works when the decorator returns the functions.
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In this state, these didn't provide anothing useful over short anonymous functions.
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* Making then and do optional:
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This actually doesn't work because if condition then (doStuff)() end would become ambigous ("condition(doStuff)() then" or "condition then doStuff()"?).
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* Whitespace significance.
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Doesn't fit with Lua's verbose keywords.
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Of course, if you really thinks these would be useful or you found a clever way of making theses work, feel free to open an issue or pull request and discuss.
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Most of Candran's additions were inspired by MoonScript, CoffeeScript, and Lilia (https://love2d.org/forums/viewtopic.php?f=3&t=82650&sid=b6d9a8dec64afcc1c67806cb5ba65458).
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Please note that the following ideas are just random though and won't be necessarly implemented, and some won't even work together.
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Feel free to open issues about ideas you find useful or want to improve. Otherwise, I will only implements them when I really need them or am bored.
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Actually, open issues for everything. I know of a couple persons using Candran but have no idea what they like and want with it.
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* class keyword
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class Thing(parents...)
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foo = "bar"
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new = :()
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stuff()
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end
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end
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local a = new Thing()
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->
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(TODO: define how classes work. May even use ClassCommons)
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* try / except|catch / finally / else / other keywords
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try
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error("hey")
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catch err
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print(err)
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finally
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clean()
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end
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* Safe navigation operator
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local name = articles?[0].author?.name (?[] and ?. index opeators)
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or
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local zip = lottery.drawWinner?().address?.zipcode (expr? existence test suffix)
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See http://coffeescript.org/#existential-operator
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* static type checking
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local a = externalFunc() -- unknown
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if a == "hey" then
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-- a = string
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a:sub(5,3) -- ok
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a:exit() -- error!
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else
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-- a = unknown
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a:exit() -- ok
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end
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Will need to define stuff for a lot of Lua libraries (see the work already done by TypedLua).
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While we're talking about static analysis, what about forking luacheck into candrancheck? Or at least make the line mapping work.
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* array slicing
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local b = a[3:5:1]
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* Destructuring assignment
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local pos = { x = 5, y = 12 }
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local {x, y} = pos -- x, y = pos.x, pos.y
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local {x = x, y = y} = pos
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local {:x, :y} = pos -- shorthand for the above line
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local [x, y] = pos -- x, y = pos[0], pos[1]
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local x, y $= pos
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And in implicit assignments:
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for i, {x, y} in ipairs(positions) do
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* Other potential inspiration
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https://www.ruby-lang.org/fr/
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Well done, you're at the end of the file!
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