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add compiler/debugutils.nim to help debugging compiler (#17652)

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* add compiler/debugutils.nim

* address comments
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Timothee Cour 2021-04-06 13:01:34 -07:00 • committed by GitHub
commit 6ab5816866
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2 changed files with 35 additions and 7 deletions
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##[
Utilities to help with debugging nim compiler.
Experimental API, subject to change.
]##
import options
var conf0: ConfigRef
proc onNewConfigRef*(conf: ConfigRef) {.inline.} =
## Caches `conf`, which can be retrieved with `getConfigRef`.
## This avoids having to forward `conf` all the way down the call chain to
## procs that need it during a debugging session.
conf0 = conf
proc getConfigRef*(): ConfigRef =
## nil, if -d:nimDebugUtils wasn't specified
result = conf0