diff options
Diffstat (limited to 'compiler/sigmatch.nim')
| -rw-r--r-- | compiler/sigmatch.nim | 46 |
1 files changed, 31 insertions, 15 deletions
diff --git a/compiler/sigmatch.nim b/compiler/sigmatch.nim index d0c9ce029..ee1ad49d0 100644 --- a/compiler/sigmatch.nim +++ b/compiler/sigmatch.nim @@ -885,6 +885,7 @@ proc maybeSkipDistinct(m: TCandidate; t: PType, callee: PSym): PType = proc tryResolvingStaticExpr(c: var TCandidate, n: PNode, allowUnresolved = false, + allowCalls = false, expectedType: PType = nil): PNode = # Consider this example: # type Value[N: static[int]] = object @@ -894,7 +895,7 @@ proc tryResolvingStaticExpr(c: var TCandidate, n: PNode, # This proc is used to evaluate such static expressions. let instantiated = replaceTypesInBody(c.c, c.bindings, n, nil, allowMetaTypes = allowUnresolved) - if instantiated.kind in nkCallKinds: + if not allowCalls and instantiated.kind in nkCallKinds: return nil result = c.c.semExpr(c.c, instantiated) @@ -966,7 +967,8 @@ proc inferStaticParam*(c: var TCandidate, lhs: PNode, rhs: BiggestInt): bool = else: discard - elif lhs.kind == nkSym and lhs.typ.kind == tyStatic and lhs.typ.n == nil: + elif lhs.kind == nkSym and lhs.typ.kind == tyStatic and + (lhs.typ.n == nil or idTableGet(c.bindings, lhs.typ) == nil): var inferred = newTypeS(tyStatic, c.c, lhs.typ.elementType) inferred.n = newIntNode(nkIntLit, rhs) put(c, lhs.typ, inferred) @@ -1877,7 +1879,11 @@ proc typeRel(c: var TCandidate, f, aOrig: PType, elif f.base.kind notin {tyNone, tyGenericParam}: result = typeRel(c, f.base, a, flags) if result != isNone and f.n != nil: - if not exprStructuralEquivalent(f.n, aOrig.n): + var r = tryResolvingStaticExpr(c, f.n) + if r == nil: r = f.n + if not exprStructuralEquivalent(r, aOrig.n) and + not (aOrig.n.kind == nkIntLit and + inferStaticParam(c, r, aOrig.n.intVal)): result = isNone elif f.base.kind == tyGenericParam: # Handling things like `type A[T; Y: static T] = object` @@ -1963,23 +1969,29 @@ proc typeRel(c: var TCandidate, f, aOrig: PType, of tyFromExpr: # fix the expression, so it contains the already instantiated types if f.n == nil or f.n.kind == nkEmpty: return isGeneric - let reevaluated = tryResolvingStaticExpr(c, f.n) - if reevaluated == nil: + if c.c.inGenericContext > 0: + # need to delay until instantiation + # also prevent infinite recursion below + return isNone + inc c.c.inGenericContext # to generate tyFromExpr again if unresolved + let reevaluated = tryResolvingStaticExpr(c, f.n, allowCalls = true).typ + dec c.c.inGenericContext + case reevaluated.kind + of tyFromExpr: + # not resolved result = isNone - return - case reevaluated.typ.kind of tyTypeDesc: - result = typeRel(c, a, reevaluated.typ.base, flags) + result = typeRel(c, a, reevaluated.base, flags) of tyStatic: - result = typeRel(c, a, reevaluated.typ.base, flags) - if result != isNone and reevaluated.typ.n != nil: - if not exprStructuralEquivalent(aOrig.n, reevaluated.typ.n): + result = typeRel(c, a, reevaluated.base, flags) + if result != isNone and reevaluated.n != nil: + if not exprStructuralEquivalent(aOrig.n, reevaluated.n): result = isNone else: # bug #14136: other types are just like 'tyStatic' here: - result = typeRel(c, a, reevaluated.typ, flags) - if result != isNone and reevaluated.typ.n != nil: - if not exprStructuralEquivalent(aOrig.n, reevaluated.typ.n): + result = typeRel(c, a, reevaluated, flags) + if result != isNone and reevaluated.n != nil: + if not exprStructuralEquivalent(aOrig.n, reevaluated.n): result = isNone of tyNone: if a.kind == tyNone: result = isEqual @@ -2188,7 +2200,11 @@ proc paramTypesMatchAux(m: var TCandidate, f, a: PType, a = typ else: if m.callee.kind == tyGenericBody: - if f.kind == tyStatic and typeRel(m, f.base, a) != isNone: + # we can't use `makeStaticExpr` if `arg` has a generic type + # because it generates `tyStatic`, which semtypinst doesn't touch + # not sure if checking for `tyFromExpr` is enough + if f.kind == tyStatic and typeRel(m, f.base, a) != isNone and + a.kind != tyFromExpr: result = makeStaticExpr(m.c, arg) result.typ.flags.incl tfUnresolved result.typ.n = arg |