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Update 'isCastable' and 'semCast' doc-comments

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This commit is contained in:
Clay Sweetser 2014-05-26 10:12:46 -04:00
commit 6608fcc60f
1 changed files with 6 additions and 2 deletions
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8
compiler/semexprs.nim
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@ -176,13 +176,16 @@ proc checkConvertible(c: PContext, castDest, src: PType): TConvStatus =
else: else:
discard discard
proc isCastable(dst, src: PType): bool = proc isCastable(dst, src: PType): bool =
## Checks whether the source type can be casted to the destination type.
## Casting is very unrestrictive; casts are allowed as long as
## castDest.size >= src.size, and typeAllowed(dst, skParam)
#const #const
# castableTypeKinds = {tyInt, tyPtr, tyRef, tyCstring, tyString, # castableTypeKinds = {tyInt, tyPtr, tyRef, tyCstring, tyString,
# tySequence, tyPointer, tyNil, tyOpenArray, # tySequence, tyPointer, tyNil, tyOpenArray,
# tyProc, tySet, tyEnum, tyBool, tyChar} # tyProc, tySet, tyEnum, tyBool, tyChar}
var ds, ss: BiggestInt var ds, ss: BiggestInt
# this is very unrestrictive; cast is allowed if castDest.size >= src.size
ds = computeSize(dst) ds = computeSize(dst)
ss = computeSize(src) ss = computeSize(src)
if ds < 0: if ds < 0:
@ -254,6 +257,7 @@ proc semConv(c: PContext, n: PNode): PNode =
localError(n.info, errUseQualifier, op.sons[0].sym.name.s) localError(n.info, errUseQualifier, op.sons[0].sym.name.s)
proc semCast(c: PContext, n: PNode): PNode = proc semCast(c: PContext, n: PNode): PNode =
## Semantically analyze a casting ("cast[type](param)")
if optSafeCode in gGlobalOptions: localError(n.info, errCastNotInSafeMode) if optSafeCode in gGlobalOptions: localError(n.info, errCastNotInSafeMode)
#incl(c.p.owner.flags, sfSideEffect) #incl(c.p.owner.flags, sfSideEffect)
checkSonsLen(n, 2) checkSonsLen(n, 2)