add isNamedTuple; make $(1, 2) be (1, 2) instead of (Field0: 1, Field1: 2) which leaked implementation detail (#10070)

* add `isNamedTuple`; make $(1, 2) be (1, 2) instead of leaking implementation detail (Field0: 1, Field1: 2)
  fixes this: #8670 (comment) /cc @alehander42 @Vindaar @mratsim

* Note: isNamedTuple is useful in other places, eg #10010 (comment)

* move isNamedTuple to helpers.nim to avoid exposing new symbol to system.nim

* remove workaround in tests/vm/tissues.nim failing test now that #10218 was makes it work
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Timothee Cour 2019-01-08 18:37:25 -08:00 • committed by GitHub
commit 6ce3949c8a
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14 changed files with 113 additions and 23 deletions

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@ -148,3 +148,14 @@ let a = @[1, 2, 3]
# a.boundedOpenArray(1, 2).foo() # Works
echo a.boundedOpenArray(1, 2).len # Internal compiler error
block: # `$`*[T: tuple|object](x: T)
doAssert $(foo1:0, bar1:"a") == """(foo1: 0, bar1: "a")"""
doAssert $(foo1:0, ) == """(foo1: 0)"""
doAssert $(0, "a") == """(0, "a")"""
doAssert $(0, ) == "(0,)"
type Foo = object
x:int
x2:float
doAssert $Foo(x:2) == "(x: 2, x2: 0.0)"
doAssert $() == "()"