380 lines
6.2 KiB
CoffeeScript
380 lines
6.2 KiB
CoffeeScript
x = 1
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y = {}
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y.x = -> 3
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ok x is 1
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ok typeof(y.x) is 'function'
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ok y.x instanceof Function
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ok y.x() is 3
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# The empty function should not cause a syntax error.
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->
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() ->
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# Multiple nested function declarations mixed with implicit calls should not
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# cause a syntax error.
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(one) -> (two) -> three four, (five) -> six seven, eight, (nine) ->
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obj = {
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name: 'Fred'
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bound: ->
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(=> eq this, obj)()
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unbound: ->
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(-> ok this isnt obj)()
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nested: ->
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(=>
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(=>
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(=>
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eq this, obj
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)()
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)()
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)()
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}
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obj.unbound()
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obj.bound()
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obj.nested()
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# Python decorator style wrapper that memoizes any function
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memoize = (fn) ->
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cache = {}
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self = this
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(args...) ->
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key = args.toString()
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return cache[key] if cache[key]
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cache[key] = fn.apply(self, args)
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Math = {
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Add: (a, b) -> a + b
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AnonymousAdd: (a, b) -> a + b
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FastAdd: memoize (a, b) -> a + b
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}
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ok Math.Add(5, 5) is 10
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ok Math.AnonymousAdd(10, 10) is 20
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ok Math.FastAdd(20, 20) is 40
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okFunc = (f) -> ok(f())
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okFunc -> true
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# Optional parens can be used in a nested fashion.
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call = (func) -> func()
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result = call ->
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inner = call ->
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Math.Add(5, 5)
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ok result is 10
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# More fun with optional parens.
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fn = (arg) -> arg
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ok fn(fn {prop: 101}).prop is 101
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# Multi-blocks with optional parens.
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result = fn( ->
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fn ->
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"Wrapped"
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)
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ok result()() is 'Wrapped'
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# And even with strange things like this:
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funcs = [((x) -> x), ((x) -> x * x)]
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result = funcs[1] 5
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ok result is 25
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result = ("hello".slice) 3
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ok result is 'lo'
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# And with multiple single-line functions on the same line.
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func = (x) -> (x) -> (x) -> x
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ok func(1)(2)(3) is 3
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# Ensure that functions with the same name don't clash with helper functions.
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del = -> 5
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ok del() is 5
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# Ensure that functions can have a trailing comma in their argument list
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mult = (x, mids..., y) ->
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x *= n for n in mids
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x *= y
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ok mult(1, 2,) is 2
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ok mult(1, 2, 3,) is 6
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ok mult(10, (i for i in [1..6])...) is 7200
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# Test for inline functions with parentheses and implicit calls.
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combine = (func, num) -> func() * num
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result = combine (-> 1 + 2), 3
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ok result is 9
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# Test for calls/parens/multiline-chains.
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f = (x) -> x
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result = (f 1).toString()
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.length
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ok result is 1
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# Test implicit calls in functions in parens:
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result = ((val) ->
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[].push val
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val
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)(10)
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ok result is 10
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# More paren compilation tests:
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reverse = (obj) -> obj.reverse()
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ok reverse([1, 2].concat 3).join(' ') is '3 2 1'
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# Passing multiple functions without paren-wrapping is legal, and should compile.
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sum = (one, two) -> one() + two()
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result = sum ->
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7 + 9
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, ->
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1 + 3
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ok result is 20
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# Implicit call with a trailing if statement as a param.
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func = -> arguments[1]
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result = func 'one', if false then 100 else 13
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ok result is 13
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# Test more function passing:
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result = sum( ->
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1 + 2
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, ->
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2 + 1
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)
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ok result is 6
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sum = (a, b) -> a + b
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result = sum(1
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, 2)
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ok result is 3
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# This is a crazy one.
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x = (obj, func) -> func obj
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ident = (x) -> x
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result = x {one: ident 1}, (obj) ->
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inner = ident(obj)
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ident inner
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ok result.one is 1
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# Assignment to a Object.prototype-named variable should not leak to outer scope.
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# FIXME: fails on IE
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(->
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constructor = 'word'
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)()
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ok constructor isnt 'word'
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# Trying an implicit object call with a trailing function.
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a = null
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meth = (arg, obj, func) -> a = [obj.a, arg, func()].join ' '
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meth 'apple', b: 1, a: 13, ->
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'orange'
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ok a is '13 apple orange'
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# Ensure that empty functions don't return mistaken values.
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obj =
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func: (@param, @rest...) ->
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ok obj.func(101, 102, 103, 104) is undefined
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ok obj.param is 101
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ok obj.rest.join(' ') is '102 103 104'
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# `@` and `this` should both be able to invoke a method.
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func = (arg) -> ok arg is true
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func.withAt = -> @ true
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func.withThis = -> this true
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func.withAt()
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func.withThis()
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# Ensure that constructors invoked with splats return a new object.
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args = [1, 2, 3]
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Type = (@args) ->
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type = new Type args
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ok type and type instanceof Type
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ok type.args and type.args instanceof Array
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ok v is args[i] for v, i in type.args
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Type1 = (@a, @b, @c) ->
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type1 = new Type1 args...
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ok type1 instanceof Type1
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eq type1.constructor, Type1
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ok type1.a is args[0] and type1.b is args[1] and type1.c is args[2]
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# Ensure that constructors invoked with splats cache the function.
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called = 0
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get = -> if called++ then false else class Type
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new get() args...
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# Chained blocks, with proper indentation levels:
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counter =
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results: []
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tick: (func) ->
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@results.push func()
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this
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counter
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.tick ->
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3
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.tick ->
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2
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.tick ->
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1
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eq counter.results.join(' '), '3 2 1'
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# Make incorrect indentation safe.
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func = ->
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obj = {
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key: 10
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}
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obj.key - 5
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eq func(), 5
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# Ensure that chained calls with indented implicit object literals below are
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# alright.
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result = null
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obj =
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method: (val) -> this
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second: (hash) -> result = hash.three
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obj
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.method(
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101
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).second(
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one:
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two: 2
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three: 3
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)
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eq result, 3
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# Test newline-supressed call chains with nested functions.
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obj =
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call: -> this
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func = ->
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obj
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.call ->
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one two
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.call ->
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three four
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101
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eq func(), 101
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# `new` shouldn't add extra parens
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ok new Date().constructor is Date
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# `new` works against bare function
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eq Date, new ->
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eq this, new => this
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Date
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# Implicit objects with number arguments.
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func = (x, y) -> y
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obj =
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prop: func "a", 1
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ok obj.prop is 1
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# Non-spaced unary and binary operators should cause a function call.
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func = (val) -> val + 1
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ok (func +5) is 6
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ok (func -5) is -4
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# Prefix unary assignment operators are allowed in parenless calls.
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val = 5
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ok (func --val) is 5
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eq ok, new ->
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ok
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### Should `return` implicitly ###
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### even with trailing comments. ###
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#855: execution context for `func arr...` should be `null`
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(->
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global = @
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contextTest = -> ok global is @
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array = []
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contextTest array
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contextTest.apply null, array
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contextTest array...
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)()
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# #894: Splatting against constructor-chained functions.
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x = null
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class Foo
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bar: (y) -> x = y
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new Foo().bar([101]...)
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eq x, 101
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test "#904: Destructuring function arguments with same-named variables in scope", ->
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a = b = nonce = {}
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fn = ([a,b]) -> {a:a,b:b}
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result = fn([c={},d={}])
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eq c, result.a
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eq d, result.b
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eq nonce, a
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eq nonce, b
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