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https://github.com/nim-lang/Nim.git
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4ca2dcb404
* Breaking parser changes, implement https://github.com/nim-lang/RFCs/issues/442 Types are separated from expressions and better reflected in the grammar. * add test * more accurate grammar * fix keyword typedescs * accept expressions in proc argument lists * CI "fixes" * fixes * allow full ref expressions again, adapt old tests * cleanup, fix some tests * improve grammar, try and revert semtypes change * restrict sigil binding to identOrLiteral * fix, should have caught this immediately * add changelog entry, fix double not nil bug * correct grammar * change section * fix * real fix hopefully * fix test * support LL(1) for tuples * make grammar.txt too
61 lines
1.4 KiB
Nim
61 lines
1.4 KiB
Nim
discard """
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output: '''
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tvarargslen.nim:35:2 (1, 2)
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tvarargslen.nim:36:2 12
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tvarargslen.nim:37:2 1
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tvarargslen.nim:38:8
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done
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'''
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"""
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## line 10
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template myecho*(a: varargs[untyped]) =
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## shows a useful debugging echo-like proc that is dependency-free (no dependency
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## on macros.nim) so can be used in more contexts
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const info = instantiationInfo(-1, false)
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const loc = info.filename & ":" & $info.line & ":" & $info.column & " "
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when varargsLen(a) > 0:
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echo(loc, a)
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else:
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echo(loc)
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template fun*(a: varargs[untyped]): untyped =
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varargsLen(a)
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template fun2*(a: varargs[typed]): untyped =
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a.varargsLen
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template fun3*(a: varargs[int]): untyped =
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a.varargsLen
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template fun4*(a: varargs[untyped]): untyped =
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len(a)
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proc main()=
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myecho (1, 2)
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myecho 1, 2
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myecho 1
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myecho()
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doAssert fun() == 0
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doAssert fun('a') == 1
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doAssert fun("asdf", 1) == 2
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doAssert fun2() == 0
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doAssert fun2('a') == 1
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doAssert fun2("asdf", 1) == 2
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doAssert fun3() == 0
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doAssert fun3(10) == 1
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doAssert fun3(10, 11) == 2
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## shows why `varargsLen` can't be named `len`
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doAssert fun4("abcdef") == len("abcdef")
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## workaround for BUG:D20191218T171447 whereby if testament expected output ends
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## in space, testament strips it from expected output but not actual output,
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## which leads to a mismatch when running test via megatest
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echo "done"
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main()
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