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Diffstat (limited to 'compiler/lowerings.nim')
| -rw-r--r-- | compiler/lowerings.nim | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/compiler/lowerings.nim b/compiler/lowerings.nim index b6b01d558..b4319b246 100644 --- a/compiler/lowerings.nim +++ b/compiler/lowerings.nim @@ -63,6 +63,26 @@ proc lowerTupleUnpacking*(n: PNode; owner: PSym): PNode = if n.sons[i].kind == nkSym: v.addVar(n.sons[i]) result.add newAsgnStmt(n.sons[i], newTupleAccess(tempAsNode, i)) +proc lowerSwap*(n: PNode; owner: PSym): PNode = + result = newNodeI(nkStmtList, n.info) + # note: cannot use 'skTemp' here cause we really need the copy for the VM :-( + var temp = newSym(skVar, getIdent(genPrefix), owner, n.info) + temp.typ = n.sons[1].typ + incl(temp.flags, sfFromGeneric) + + var v = newNodeI(nkVarSection, n.info) + let tempAsNode = newSymNode(temp) + + var vpart = newNodeI(nkIdentDefs, v.info, 3) + vpart.sons[0] = tempAsNode + vpart.sons[1] = ast.emptyNode + vpart.sons[2] = n[1] + addSon(v, vpart) + + result.add(v) + result.add newFastAsgnStmt(n[1], n[2]) + result.add newFastAsgnStmt(n[2], tempAsNode) + proc createObj*(owner: PSym, info: TLineInfo): PType = result = newType(tyObject, owner) rawAddSon(result, nil) |