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expectLen now shows the length that we got (#13387)

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Clyybber 2020-02-11 12:31:52 +01:00 • committed by GitHub
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lib/core/macros.nim
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@ -612,20 +612,20 @@ proc expectMinLen*(n: NimNode, min: int) {.compileTime.} =
## Checks that `n` has at least `min` children. If this is not the case,
## compilation aborts with an error message. This is useful for writing
## macros that check its number of arguments.
if n.len < min: error("macro expects a node with " & $min & " children", n)
if n.len < min: error("Expected a node with at least " & $min & " children, got " & $n.len, n)
proc expectLen*(n: NimNode, len: int) {.compileTime.} =
## Checks that `n` has exactly `len` children. If this is not the case,
## compilation aborts with an error message. This is useful for writing
## macros that check its number of arguments.
if n.len != len: error("macro expects a node with " & $len & " children", n)
if n.len != len: error("Expected a node with " & $len & " children, got " & $n.len, n)
proc expectLen*(n: NimNode, min, max: int) {.compileTime.} =
## Checks that `n` has a number of children in the range ``min..max``.
## If this is not the case, compilation aborts with an error message.
## This is useful for writing macros that check its number of arguments.
if n.len < min or n.len > max:
error("macro expects a node with " & $min & ".." & $max & " children", n)
error("Expected a node with " & $min & ".." & $max & " children, got " & $n.len, n)
proc newTree*(kind: NimNodeKind,
children: varargs[NimNode]): NimNode {.compileTime.} =