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fixes #7524

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This commit is contained in:
Araq 2019-01-14 12:15:29 +01:00
commit 825e08b046
3 changed files with 23 additions and 9 deletions
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15
compiler/parampatterns.nim
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@ -115,20 +115,19 @@ proc compileConstraints(p: PNode, result: var TPatternCode; conf: ConfigRef) =
else:
patternError(p, conf)
proc semNodeKindConstraints*(p: PNode; conf: ConfigRef): PNode =
proc semNodeKindConstraints*(n: PNode; conf: ConfigRef; start: Natural): PNode =
## does semantic checking for a node kind pattern and compiles it into an
## efficient internal format.
assert p.kind == nkCurlyExpr
result = newNodeI(nkStrLit, p.info)
result = newNodeI(nkStrLit, n.info)
result.strVal = newStringOfCap(10)
result.strVal.add(chr(aqNone.ord))
if p.len >= 2:
for i in 1..<p.len:
compileConstraints(p.sons[i], result.strVal, conf)
if n.len >= 2:
for i in start..<n.len:
compileConstraints(n[i], result.strVal, conf)
if result.strVal.len > MaxStackSize-1:
internalError(conf, p.info, "parameter pattern too complex")
internalError(conf, n.info, "parameter pattern too complex")
else:
patternError(p, conf)
patternError(n, conf)
result.strVal.add(ppEof)
type

7
compiler/semtypes.nim
View file

@ -1028,7 +1028,12 @@ proc liftParamType(c: PContext, procKind: TSymKind, genericParams: PNode,
proc semParamType(c: PContext, n: PNode, constraint: var PNode): PType =
if n.kind == nkCurlyExpr:
result = semTypeNode(c, n.sons[0], nil)
constraint = semNodeKindConstraints(n, c.config)
constraint = semNodeKindConstraints(n, c.config, 1)
elif n.kind == nkCall and
n[0].kind in {nkIdent, nkSym, nkOpenSymChoice, nkClosedSymChoice} and
considerQuotedIdent(c, n[0]).s == "{}":
result = semTypeNode(c, n[1], nil)
constraint = semNodeKindConstraints(n, c.config, 2)
else:
result = semTypeNode(c, n, nil)