mirror of
https://github.com/nim-lang/Nim.git
synced 2026-01-05 20:47:53 +00:00
14b2354b7d
* rename 'lenTuple' to 'tupleLen' Rationale: `lenTuple` is a tuple consisting of lengths (e.g. `(1, 5, 0)`), `tupleLen` is a length of a tuple (e.g. `tupleLen((1, 5, 0) == 3`) * rename 'lenVarargs' to 'varargsLen' The same rationale as a previous commit. Consistency.
61 lines
1.4 KiB
Nim
61 lines
1.4 KiB
Nim
discard """
|
|
output: '''
|
|
tvarargslen.nim:35:9 (1, 2)
|
|
tvarargslen.nim:36:9 12
|
|
tvarargslen.nim:37:9 1
|
|
tvarargslen.nim:38:8
|
|
done
|
|
'''
|
|
"""
|
|
## line 10
|
|
|
|
template myecho*(a: varargs[untyped]) =
|
|
## shows a useful debugging echo-like proc that is dependency-free (no dependency
|
|
## on macros.nim) so can be used in more contexts
|
|
const info = instantiationInfo(-1, false)
|
|
const loc = info.filename & ":" & $info.line & ":" & $info.column & " "
|
|
when varargsLen(a) > 0:
|
|
echo(loc, a)
|
|
else:
|
|
echo(loc)
|
|
|
|
template fun*(a: varargs[untyped]): untyped =
|
|
varargsLen(a)
|
|
|
|
template fun2*(a: varargs[typed]): untyped =
|
|
a.varargsLen
|
|
|
|
template fun3*(a: varargs[int]): untyped =
|
|
a.varargsLen
|
|
|
|
template fun4*(a: varargs[untyped]): untyped =
|
|
len(a)
|
|
|
|
proc main()=
|
|
myecho (1, 2)
|
|
myecho 1, 2
|
|
myecho 1
|
|
myecho()
|
|
|
|
doAssert fun() == 0
|
|
doAssert fun('a') == 1
|
|
doAssert fun("asdf", 1) == 2
|
|
|
|
doAssert fun2() == 0
|
|
doAssert fun2('a') == 1
|
|
doAssert fun2("asdf", 1) == 2
|
|
|
|
doAssert fun3() == 0
|
|
doAssert fun3(10) == 1
|
|
doAssert fun3(10, 11) == 2
|
|
|
|
## shows why `varargsLen` can't be named `len`
|
|
doAssert fun4("abcdef") == len("abcdef")
|
|
|
|
## workaround for BUG:D20191218T171447 whereby if testament expected output ends
|
|
## in space, testament strips it from expected output but not actual output,
|
|
## which leads to a mismatch when running test via megatest
|
|
echo "done"
|
|
|
|
main()
|