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type Foo = object
bar: int
var foo = Foo(bar: 10)
template bar: int = foo.bar
doAssert bar == 10
bar = 15
doAssert bar == 15
var foo2 = Foo(bar: -10)
doAssert bar == 15
# works in generics
proc genericProc[T](x: T): string =
$(x, bar)
doAssert genericProc(true) == "(true, 15)"
# redefine
template bar: int {.redefine.} = foo2.bar
doAssert bar == -10
block: # subscript
var bazVal = @[1, 2, 3]
template baz: seq[int] = bazVal
doAssert baz[1] == 2
proc genericProc2[T](x: T): string =
result = $(x, baz[1])
baz[1] = 7
doAssert genericProc2(true) == "(true, 2)"
doAssert baz[1] == 7
baz[1] = 14
doAssert baz[1] == 14
block: # type alias
template Int2: untyped = int
let x: Int2 = 123
proc generic[T](): string =
template U: untyped = T
var x: U
result = $typeof(x)
doAssert result == $U
doAssert result == $T
doAssert generic[int]() == "int"
doAssert generic[Int2]() == "int"
doAssert generic[string]() == "string"
doAssert generic[seq[int]]() == "seq[int]"
doAssert generic[seq[Int2]]() == "seq[int]"
discard generic[123]()
proc genericStatic[X; T: static[X]](): string =
template U: untyped = T
result = $U
doAssert result == $T
doAssert genericStatic[int, 123]() == "123"
doAssert genericStatic[Int2, 123]() == "123"
doAssert genericStatic[(string, bool), ("a", true)]() == "(\"a\", true)"
block: # issue #13515
template test: bool = true
# compiles:
if not test:
doAssert false
# does not compile:
template x =
if not test:
doAssert false
x
import macros
block: # issue #21727
template debugAnnotation(s: typed): string =
astToStr s
macro cpsJump(x: int): untyped =
result = newLit(debugAnnotation(cpsJump))
doAssert cpsJump(13) == "cpsJump"
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