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infer static parameters even when more complicated arithmetic is involved

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This commit is contained in:
Zahary Karadjov 2016-08-12 03:25:59 +03:00
commit 0f2c4be129
10 changed files with 139 additions and 48 deletions
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15
compiler/semdata.nim
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@ -318,23 +318,14 @@ 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
if n.typ != nil and n.typ.n == nil:
result.flags.incl tfUnresolved
result.n = newNode(nkRange, n.info, @[
newIntTypeNode(nkIntLit, 0, intType),
makeStaticExpr(c, n.nMinusOne)])
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
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)
tfUnresolved in t.flags
proc errorType*(c: PContext): PType =
## creates a type representing an error state