diff options
| -rw-r--r-- | compiler/lambdalifting.nim | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/compiler/lambdalifting.nim b/compiler/lambdalifting.nim index 753602c80..36ad2e0a6 100644 --- a/compiler/lambdalifting.nim +++ b/compiler/lambdalifting.nim @@ -226,8 +226,14 @@ proc interestingIterVar(s: PSym): bool {.inline.} = template isIterator*(owner: PSym): bool = owner.kind == skIterator and owner.typ.callConv == ccClosure +proc liftingHarmful(owner: PSym): bool {.inline.} = + ## lambda lifting can be harmful for JS-like code generators. + let isCompileTime = sfCompileTime in owner.flags or owner.kind == skMacro + result = gCmd in {cmdCompileToPHP, cmdCompileToJS} and not isCompileTime + proc liftIterSym*(n: PNode; owner: PSym): PNode = # transforms (iter) to (let env = newClosure[iter](); (iter, env)) + if liftingHarmful(owner): return n let iter = n.sym assert iter.isIterator @@ -838,6 +844,7 @@ proc liftForLoop*(body: PNode; owner: PSym): PNode = nkBreakState(cl.state) ... """ + if liftingHarmful(owner): return body var L = body.len if not (body.kind == nkForStmt and body[L-2].kind in nkCallKinds): localError(body.info, "ignored invalid for loop") |