mirror of
https://github.com/nim-lang/Nim.git
synced 2026-02-17 16:38:33 +00:00
committed by
Andreas Rumpf
parent
bd2f4d1852
commit
b02ecda5a0
@@ -20,6 +20,8 @@
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include "system/inclrtl"
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import macros
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when not defined(nimhygiene):
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{.pragma: dirty.}
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@@ -704,6 +706,28 @@ template newSeqWith*(len: int, init: untyped): untyped =
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result[i] = init
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result
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macro asArray*(targetType: untyped, values: typed): untyped =
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## applies a type conversion to each of the elements in the specified
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## array literal. Each element is converted to the ``targetType`` type..
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##
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## Example:
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##
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## .. code-block::
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## let x = asArray(int, [0.1, 1.2, 2.3, 3.4])
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## doAssert x is array[4, int]
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##
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## Short notation for:
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##
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## .. code-block::
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## let x = [(0.1).int, (1.2).int, (2.3).int, (3.4).int]
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values.expectKind(nnkBracket)
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result = newNimNode(nnkBracket, lineInfoFrom=values)
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for i in 0 ..< len(values):
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var call = newNimNode(nnkCall, lineInfoFrom=values[i])
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call.add targetType
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call.add values[i]
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result.add call
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when isMainModule:
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import strutils
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block: # concat test
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@@ -992,5 +1016,11 @@ when isMainModule:
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seq2D[0][1] = true
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doAssert seq2D == @[@[true, true], @[true, false], @[false, false], @[false, false]]
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block: # asArray tests
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let x = asArray(int, [1.2, 2.3, 3.4, 4.5])
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doAssert x is array[4, int]
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let y = asArray(`$`, [1.2, 2.3, 3.4, 4.5])
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doAssert y is array[4, string]
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when not defined(testing):
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echo "Finished doc tests"
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@@ -198,33 +198,3 @@ macro dump*(x: typed): untyped =
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let r = quote do:
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debugEcho `s`, " = ", `x`
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return r
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macro asArray*(targetType: untyped, values: typed): untyped =
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## applies a type conversion to each of the elements in the specified
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## array literal. Each element is converted to the ``targetType`` type..
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##
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## Example:
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##
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## .. code-block::
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## let x = asArray(int, [0.1, 1.2, 2.3, 3.4])
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## doAssert x is array[4, int]
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##
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## Short notation for:
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##
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## .. code-block::
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## let x = [(0.1).int, (1.2).int, (2.3).int, (3.4).int]
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values.expectKind(nnkBracket)
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result = newNimNode(nnkBracket, lineInfoFrom=values)
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for i in 0 ..< len(values):
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var call = newNimNode(nnkCall, lineInfoFrom=values[i])
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call.add targetType
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call.add values[i]
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result.add call
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echo result.repr()
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when isMainModule:
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block: # asArray tests
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let x = asArray(int, [1.2, 2.3, 3.4, 4.5])
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doAssert x is array[4, int]
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let y = asArray(`$`, [1.2, 2.3, 3.4, 4.5])
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doAssert y is array[4, string]
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