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support for inferring static[T] concept params

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This commit is contained in:
Zahary Karadjov 2016-08-02 05:15:19 +03:00
commit 76c663f692
8 changed files with 144 additions and 28 deletions
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16
compiler/semdata.nim
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@ -273,7 +273,8 @@ proc newTypeWithSons*(c: PContext, kind: TTypeKind,
proc makeStaticExpr*(c: PContext, n: PNode): PNode =
result = newNodeI(nkStaticExpr, n.info)
result.sons = @[n]
result.typ = newTypeWithSons(c, tyStatic, @[n.typ])
result.typ = if n.typ != nil and n.typ.kind == tyStatic: n.typ
else: newTypeWithSons(c, tyStatic, @[n.typ])
proc makeAndType*(c: PContext, t1, t2: PType): PType =
result = newTypeS(tyAnd, c)
@ -317,16 +318,23 @@ proc makeRangeWithStaticExpr*(c: PContext, n: PNode): PType =
let intType = getSysType(tyInt)
result = newTypeS(tyRange, c)
result.sons = @[intType]
if n.typ.n == nil: result.flags.incl tfUnresolved
result.n = newNode(nkRange, n.info, @[
newIntTypeNode(nkIntLit, 0, intType),
makeStaticExpr(c, n.nMinusOne)])
template rangeHasStaticIf*(t: PType): bool =
template rangeHasUnresolvedStatic*(t: PType): bool =
# this accepts the ranges's node
t.n != nil and t.n.len > 1 and t.n[1].kind == nkStaticExpr
template getStaticTypeFromRange*(t: PType): PType =
t.n[1][0][1].typ
proc findUnresolvedStaticInRange*(t: PType): (PType, int) =
assert t.kind == tyRange
# XXX: This really needs to become more sophisticated
let upperBound = t.n[1]
if upperBound[0].kind == nkCall:
return (upperBound[0][1].typ, 1)
else:
return (upperBound.typ, 0)
proc errorType*(c: PContext): PType =
## creates a type representing an error state