On Thu, Apr 27, 2017 at 5:43 PM, Soni L. <fakedme@gmail.com
<mailto:fakedme@gmail.com>> wrote:
So, out of all syntax proposals for lambas, I'm surpised nobody
thought of this beauty.
You see, we have `local x = function(a,b,c) return thing end`
syntax. BUT:
1. It's a syntax error to use `function(a,b,c) =thing end`, even
if the REPL accepts `=` as an alias for `return`.
2. Do we need `end` if we restrict it to a single expression?
Combine these 2, and the simplest solution seems to be:
local x = function(a,b,c) = thing
AND we can still get multiple returns:
local x = function(a,b,c) = select(1,a,b,c)
print(x(1, 2, 3)) --> 1, 2, 3
The idea is, function(a,b,c) starts a plain old function. If the
next token is a =, this has to be a lambda. Otherwise it has to be
a function.
There's no ambiguity here since the proposed syntax is currently a
syntax error. It also looks very much like Lua.
The following looks nice:
local swap = function(a,b) = b,a
But what does the following nested lambda
local x = function(a,b) = function() = a, b
mean:
local x = function(a,b) = (function() = a, b)
or
local x = function(a,b) = (function() = a), b
?
