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C++ support: codegen generates C++'s references and avoids copies

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This commit is contained in:
Araq 2015-02-03 13:21:05 +01:00
commit e75e421912
7 changed files with 156 additions and 101 deletions
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13
compiler/ccgstmts.nim
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@ -202,8 +202,19 @@ proc genSingleVar(p: BProc, a: PNode) =
genVarPrototypeAux(generatedHeader, v)
registerGcRoot(p, v)
else:
let imm = isAssignedImmediately(a.sons[2])
if imm and p.module.compileToCpp:
# C++ really doesn't like things like 'Foo f; f = x' as that invokes a
# parameterless constructor followed by an assignment operator. So we
# generate better code here:
genLineDir(p, a)
let decl = localVarDecl(p, v)
var tmp: TLoc
initLocExprSingleUse(p, a.sons[2], tmp)
lineF(p, cpsStmts, "$# = $#;$n", decl, tmp.rdLoc)
return
assignLocalVar(p, v)
initLocalVar(p, v, isAssignedImmediately(a.sons[2]))
initLocalVar(p, v, imm)
if a.sons[2].kind != nkEmpty:
genLineDir(targetProc, a)