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.noalias annotation; frontend support (#15419)

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* .noalias annotation; frontend support

* added .noalias support to Nim; implements https://github.com/nim-lang/RFCs/issues/204
This commit is contained in:
Andreas Rumpf 2020-09-28 13:51:39 +02:00 • committed by GitHub
commit 50b6f6996a
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11 changed files with 53 additions and 12 deletions
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10
compiler/semtypes.nim
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@ -1264,6 +1264,8 @@ proc semProcTypeNode(c: PContext, n, genericParams: PNode,
for j in 0..<a.len-2:
var arg = newSymG(skParam, if a[j].kind == nkPragmaExpr: a[j][0] else: a[j], c)
if a[j].kind == nkPragmaExpr:
pragma(c, arg, a[j][1], paramPragmas)
if not hasType and not hasDefault and kind notin {skTemplate, skMacro}:
let param = strTableGet(c.signatures, arg.name)
if param != nil: typ = param.typ
@ -2056,7 +2058,7 @@ proc semGenericConstraints(c: PContext, x: PType): PType =
proc semGenericParamList(c: PContext, n: PNode, father: PType = nil): PNode =
template addSym(result: PNode, s: PSym): untyped =
template addSym(result: PNode, s: PSym): untyped =
if father != nil: addSonSkipIntLit(father, s.typ)
if sfGenSym notin s.flags: addDecl(c, s)
result.add newSymNode(s)
@ -2066,8 +2068,8 @@ proc semGenericParamList(c: PContext, n: PNode, father: PType = nil): PNode =
illFormedAst(n, c.config)
return
for i in 0..<n.len:
var a = n[i]
case a.kind
var a = n[i]
case a.kind
of nkSym: result.addSym(a.sym)
of nkIdentDefs:
var def = a[^1]
@ -2128,7 +2130,7 @@ proc semGenericParamList(c: PContext, n: PNode, father: PType = nil): PNode =
if covarianceFlag != tfUnresolved: s.typ.flags.incl(covarianceFlag)
if def.kind != nkEmpty: s.ast = def
s.position = result.len
s.position = result.len
result.addSym(s)
else:
illFormedAst(n, c.config)