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discard """
matrix: "--mm:refc"
output: '''Sortable
Sortable
Container
TObj
int
111 111
(id: @[1, 2, 3], name: @["Vas", "Pas", "NafNaf"], age: @[10, 16, 18])
'''
"""
# todo wait for https://github.com/nim-lang/Nim/pull/20380
import typetraits
template reject(expr) = assert(not compiles(x))
type
TObj = object
x: int
JSonValue = object
val: string
Sortable = concept x, y
(x < y) is bool
ObjectContainer = concept C
C.len is Ordinal
for v in items(C):
v.type is tuple|object
proc foo(c: ObjectContainer) =
echo "Container"
proc foo(x: Sortable) =
echo "Sortable"
foo 10
foo "test"
foo(@[TObj(x: 10), TObj(x: 20)])
proc intval(x: int): int = 10
type
TFoo = concept o, type T, ref r, var v, ptr p, static s
o.x
y(o) is int
var str: string
var intref: ref int
refproc(ref T, ref int)
varproc(var T)
ptrproc(ptr T, str)
staticproc(static[T])
typeproc T
T.typeproc
typeproc o.type
o.type.typeproc
o.to(type string)
o.to(type JsonValue)
refproc(r, intref)
varproc(v)
p.ptrproc(string)
staticproc s
typeproc(T)
const TypeName = T.name
type MappedType = type(o.y)
intval y(o)
let z = intval(o.y)
static:
assert T.name.len == 4
reject o.name
reject o.typeproc
reject staticproc(o)
reject o.varproc
reject T.staticproc
reject p.staticproc
proc y(x: TObj): int = 10
proc varproc(x: var TObj) = discard
proc refproc(x: ref TObj, y: ref int) = discard
proc ptrproc(x: ptr TObj, y: string) = discard
proc staticproc(x: static[TObj]) = discard
proc typeproc(t: type TObj) = discard
proc to(x: TObj, t: type string) = discard
proc to(x: TObj, t: type JSonValue) = discard
proc testFoo(x: TFoo) =
echo x.TypeName
echo x.MappedType.name
testFoo(TObj(x: 10))
# bug #7092
type stringTest = concept x
x is string
let usedToFail: stringTest = "111"
let working: string = "111"
echo usedToFail, " ", working
# bug #5868
type TaggedType[T; Key: static[string]] = T
proc setKey*[DT](dt: DT, key: static[string]): TaggedType[DT, key] =
result = cast[type(result)](dt)
type Students = object
id : seq[int]
name : seq[string]
age: seq[int]
let
stud = Students(id : @[1,2,3], name : @["Vas", "Pas", "NafNaf"], age : @[10,16,18])
stud2 = stud.setkey("id")
echo stud2
|
