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discard """
targets: "cpp"
output: '''6.0
0'''
"""
# bug #4730
type Vector* {.importcpp: "std::vector", header: "<vector>".}[T] = object
template `[]=`*[T](v: var Vector[T], key: int, val: T) =
{.emit: [v, "[", key, "] = ", val, ";"].}
proc setLen*[T](v: var Vector[T]; size: int) {.importcpp: "resize", nodecl.}
proc `[]`*[T](v: var Vector[T], key: int): T {.importcpp: "(#[#])", nodecl.}
proc main =
var v: Vector[float]
v.setLen 1
v[0] = 6.0
echo v[0]
main()
#------------
#bug #6837
type StdString {.importCpp: "std::string", header: "<string>", byref.} = object
proc initString(): StdString {.constructor, importCpp: "std::string(@)", header: "<string>".}
proc size(this: var StdString): csize_t {.importCpp: "size", header: "<string>".}
proc f(): csize_t =
var myString: StdString = initString()
return myString.size()
echo f()
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