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add a useful helper for debugging typeRel problems

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This commit is contained in:
Zahary Karadjov
2017-06-10 17:39:34 +03:00
committed by Andreas Rumpf
parent 268b918150
commit dea6d8dd94
1 changed files with 26 additions and 4 deletions
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30
compiler/sigmatch.nim
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@@ -302,8 +302,30 @@ proc describeArgs*(c: PContext, n: PNode, startIdx = 1;
add(result, argTypeToString(arg, prefer))
if i != sonsLen(n) - 1: add(result, ", ")
proc typeRel*(c: var TCandidate, f, aOrig: PType,
flags: TTypeRelFlags = {}): TTypeRelation
proc typeRelImpl*(c: var TCandidate, f, aOrig: PType,
flags: TTypeRelFlags = {}): TTypeRelation
var nextTypeRel = 0
template typeRel*(c: var TCandidate, f, aOrig: PType,
flags: TTypeRelFlags = {}): TTypeRelation =
const traceTypeRel = false
when traceTypeRel:
var enteringAt = nextTypeRel
if mdbg:
inc nextTypeRel
echo "----- TYPE REL ", enteringAt
debug f
debug aOrig
let r = typeRelImpl(c, f, aOrig, flags)
when traceTypeRel:
if enteringAt != nextTypeRel:
echo "----- TYPE REL ", enteringAt, " RESULT: ", r
r
proc concreteType(c: TCandidate, t: PType): PType =
case t.kind
@@ -871,8 +893,8 @@ proc isCovariantPtr(c: var TCandidate, f, a: PType): bool =
else:
return false
proc typeRel(c: var TCandidate, f, aOrig: PType,
flags: TTypeRelFlags = {}): TTypeRelation =
proc typeRelImpl(c: var TCandidate, f, aOrig: PType,
flags: TTypeRelFlags = {}): TTypeRelation =
# typeRel can be used to establish various relationships between types:
#
# 1) When used with concrete types, it will check for type equivalence