0005904: -ppx could be made working in toplevel

Notes
(0008797) frisch (developer) 2013-01-25 10:15 edited on: 2013-01-25 10:22	Commit 13278 (trunk) adds support for -ppx to the toplevel. Each phrase (not directives) is passed to external rewriters. Not that when the toplevel is used to execute a script (passed on its command-line, or with #use), then each phrase is rewritten independently. It might be worth sending the whole script to the rewriter instead. It would also allow the rewriter to rewrite directives. Actually, it would make sense to allow the rewriters to maintain their state across phrases. This could be done by letting the rewriters send (and read back) some extra custom data in addition to the ASTs; this requires the rewriter to maintain a clean notion of state, which can be easily serialized. Otherwise, we could keep the rewriters alive as external processes and talk with them for each phrase. But this requires more complex process control logic (from module Unix).

(0008802) meyer (developer) 2013-01-27 23:24 edited on: 2013-01-27 23:24	That sounds awesome, thanks.

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