Nim/lib/pure/typetraits.nim
2014-08-28 09:50:51 +02:00

36 lines
863 B
Nim

#
#
# Nim's Runtime Library
# (c) Copyright 2012 Nim Contributors
#
# See the file "copying.txt", included in this
# distribution, for details about the copyright.
#
## This module defines compile-time reflection procs for
## working with types
proc name*(t: typedesc): string {.magic: "TypeTrait".}
## Returns the name of the given type.
##
## Example:
##
## .. code-block::
##
## import typetraits
##
## proc `$`*[T](some:typedesc[T]): string = name(T)
##
## template test(x): stmt =
## echo "type: ", type(x), ", value: ", x
##
## test 42
## # --> type: int, value: 42
## test "Foo"
## # --> type: string, value: Foo
## test(@['A','B'])
## # --> type: seq[char], value: @[A, B]
proc arity*(t: typedesc): int {.magic: "TypeTrait".}
## Returns the arity of the given type