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3aa16c1de0
* fix RFC #341: dot-like operators are now parsed with same precedence as `.` * fixup * [skip ci] address comment in changelog * address comment * update grammmar * add manual entry * fixup * -d:nimPreviewDotLikeOps * address comment to unblock PR: move nimPreviewDotLikeOps out of config/config.nims
28 lines
807 B
Nim
28 lines
807 B
Nim
# test for https://github.com/nim-lang/RFCs/issues/341
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import std/json
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import std/jsonutils
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import std/macros
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macro fn1(a: untyped): string = newLit a.lispRepr
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doAssert fn1(a.?b.c) == """(DotExpr (Infix (Ident ".?") (Ident "a") (Ident "b")) (Ident "c"))"""
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template `.?`(a: JsonNode, b: untyped{ident}): JsonNode =
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a[astToStr(b)]
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proc identity[T](a: T): T = a
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proc timesTwo[T](a: T): T = a * 2
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template main =
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let a = (a1: 1, a2: "abc", a3: (a4: 2.5))
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let j = a.toJson
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doAssert j.?a1.getInt == 1
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doAssert j.?a3.?a4.getFloat == 2.5
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doAssert j.?a3.?a4.getFloat.timesTwo == 5.0
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doAssert j.?a3.identity.?a4.getFloat.timesTwo == 5.0
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doAssert j.identity.?a3.identity.?a4.identity.getFloat.timesTwo == 5.0
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doAssert j.identity.?a3.?a4.identity.getFloat.timesTwo == 5.0
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static: main()
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main()
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