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fixes #4097

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This commit is contained in:
Andreas Rumpf 2016-04-19 11:56:35 +02:00
commit 8dfdea8919
3 changed files with 30 additions and 9 deletions
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4
compiler/semexprs.nim
View file

@ -74,6 +74,10 @@ proc semSymGenericInstantiation(c: PContext, n: PNode, s: PSym): PNode =
proc inlineConst(n: PNode, s: PSym): PNode {.inline.} = proc inlineConst(n: PNode, s: PSym): PNode {.inline.} =
result = copyTree(s.ast) result = copyTree(s.ast)
if result.isNil:
localError(n.info, "constant of type '" & typeToString(s.typ) & "' has no value")
result = newSymNode(s)
else:
result.typ = s.typ result.typ = s.typ
result.info = n.info result.info = n.info

14
compiler/seminst.nim
View file

@ -111,9 +111,9 @@ proc removeDefaultParamValues(n: PNode) =
# not possible... XXX We don't solve this issue here. # not possible... XXX We don't solve this issue here.
a.sons[L-1] = ast.emptyNode a.sons[L-1] = ast.emptyNode
proc freshGenSyms(n: PNode, owner: PSym, symMap: var TIdTable) = proc freshGenSyms(n: PNode, owner, orig: PSym, symMap: var TIdTable) =
# we need to create a fresh set of gensym'ed symbols: # we need to create a fresh set of gensym'ed symbols:
if n.kind == nkSym and sfGenSym in n.sym.flags: if n.kind == nkSym and sfGenSym in n.sym.flags and n.sym.owner == orig:
let s = n.sym let s = n.sym
var x = PSym(idTableGet(symMap, s)) var x = PSym(idTableGet(symMap, s))
if x == nil: if x == nil:
@ -122,7 +122,7 @@ proc freshGenSyms(n: PNode, owner: PSym, symMap: var TIdTable) =
idTablePut(symMap, s, x) idTablePut(symMap, s, x)
n.sym = x n.sym = x
else: else:
for i in 0 .. <safeLen(n): freshGenSyms(n.sons[i], owner, symMap) for i in 0 .. <safeLen(n): freshGenSyms(n.sons[i], owner, orig, symMap)
proc addParamOrResult(c: PContext, param: PSym, kind: TSymKind) proc addParamOrResult(c: PContext, param: PSym, kind: TSymKind)
@ -137,7 +137,7 @@ proc addProcDecls(c: PContext, fn: PSym) =
maybeAddResult(c, fn, fn.ast) maybeAddResult(c, fn, fn.ast)
proc instantiateBody(c: PContext, n, params: PNode, result: PSym) = proc instantiateBody(c: PContext, n, params: PNode, result, orig: PSym) =
if n.sons[bodyPos].kind != nkEmpty: if n.sons[bodyPos].kind != nkEmpty:
inc c.inGenericInst inc c.inGenericInst
# add it here, so that recursive generic procs are possible: # add it here, so that recursive generic procs are possible:
@ -149,7 +149,7 @@ proc instantiateBody(c: PContext, n, params: PNode, result: PSym) =
let param = params[i].sym let param = params[i].sym
if sfGenSym in param.flags: if sfGenSym in param.flags:
idTablePut(symMap, params[i].sym, result.typ.n[param.position+1].sym) idTablePut(symMap, params[i].sym, result.typ.n[param.position+1].sym)
freshGenSyms(b, result, symMap) freshGenSyms(b, result, orig, symMap)
b = semProcBody(c, b) b = semProcBody(c, b)
b = hloBody(c, b) b = hloBody(c, b)
n.sons[bodyPos] = transformBody(c.module, b, result) n.sons[bodyPos] = transformBody(c.module, b, result)
@ -165,7 +165,7 @@ proc fixupInstantiatedSymbols(c: PContext, s: PSym) =
openScope(c) openScope(c)
var n = oldPrc.ast var n = oldPrc.ast
n.sons[bodyPos] = copyTree(s.getBody) n.sons[bodyPos] = copyTree(s.getBody)
instantiateBody(c, n, nil, oldPrc) instantiateBody(c, n, nil, oldPrc, s)
closeScope(c) closeScope(c)
popInfoContext() popInfoContext()
@ -312,7 +312,7 @@ proc generateInstance(c: PContext, fn: PSym, pt: TIdTable,
pragma(c, result, n.sons[pragmasPos], allRoutinePragmas) pragma(c, result, n.sons[pragmasPos], allRoutinePragmas)
if isNil(n.sons[bodyPos]): if isNil(n.sons[bodyPos]):
n.sons[bodyPos] = copyTree(fn.getBody) n.sons[bodyPos] = copyTree(fn.getBody)
instantiateBody(c, n, fn.typ.n, result) instantiateBody(c, n, fn.typ.n, result, fn)
sideEffectsCheck(c, result) sideEffectsCheck(c, result)
paramsTypeCheck(c, result.typ) paramsTypeCheck(c, result.typ)
else: else:

17
tests/template/typedescids.nim Normal file
View file

@ -0,0 +1,17 @@
discard """
output: '''2 3'''
"""
# bug #4097
var i {.compileTime.} = 2
template defineId*(t: typedesc): stmt =
const id {.genSym.} = i
static: inc(i)
proc idFor*(T: typedesc[t]): int {.inline, raises: [].} = id
defineId(int8)
defineId(int16)
echo idFor(int8), " ", idFor(int16)