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Diffstat (limited to 'src/ptrmath.nim')
| -rw-r--r-- | src/ptrmath.nim | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/ptrmath.nim b/src/ptrmath.nim new file mode 100644 index 0000000..7de2fa6 --- /dev/null +++ b/src/ptrmath.nim @@ -0,0 +1,19 @@ +# from http://forum.nim-lang.org/t/1188#7366 + +template `+`*[T](p: ptr T, off: int): ptr T = + cast[ptr type(p[])](cast[ByteAddress](p) +% off * sizeof(p[])) + +template `+=`*[T](p: ptr T, off: int) = + p = p + off + +template `-`*[T](p: ptr T, off: int): ptr T = + cast[ptr type(p[])](cast[ByteAddress](p) -% off * sizeof(p[])) + +template `-=`*[T](p: ptr T, off: int) = + p = p - off + +template `[]`*[T](p: ptr T, off: int): T = + (p + off)[] + +template `[]=`*[T](p: ptr T, off: int, val: T) = + (p + off)[] = val
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