jyapayne/Nim
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

added a version of macros.expectLen that takes min/max values

Browse source
This commit is contained in:
Araq 2017-11-21 01:42:53 +01:00
commit fba5f5acd6
2 changed files with 7 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

7
lib/core/macros.nim
View file

@ -435,6 +435,13 @@ proc expectLen*(n: NimNode, len: int) {.compileTime.} =
## macros that check its number of arguments. ## 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("macro expects a node with " & $len & " children", 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)
proc newTree*(kind: NimNodeKind, proc newTree*(kind: NimNodeKind,
children: varargs[NimNode]): NimNode {.compileTime.} = children: varargs[NimNode]): NimNode {.compileTime.} =
## produces a new node with children. ## produces a new node with children.

0
tests/js/tarrayboundscheck.nim Executable file → Normal file
View file