On Tue, Feb 19, 2013 at 12:33 AM, Mark H Weaver <m...@netris.org> wrote: > Mikael Djurfeldt <mik...@djurfeldt.com> writes: >> I propose to simplify this to only two levels: >> >> 1. %read-hash-procedures >> 2. predefined syntax
It turns out that the change I propose above was already implemented in read.c. The effect just wasn't visible due to a bug in flush_ws which caused all #! to be erroneously removed if they exist as the outermost expression. In the attached diff, I've fixed the flush_ws bug and cleaned up some garbage code in scm_read_sharp which was unreachable. Can I push this into the repository? > I don't think this would be sufficient. The problem is that tokens of > the form "#!<symbol><delimiter>" have become standardized. To name a > few examples, both R6RS and R7RS define the reader directives > #!fold-case and #!no-fold-case, R6RS has #!r6rs, and SRFI-105 has > #!curly-infix. Guile also has #! ... !# block comments to help with the > handling of executable scripts. In what sense is it not sufficient? In any case: The present diff doesn't remove any functionality or make performance worse. It only removes some inconsistent behavior. At the same time it allows support for mit-scheme #!optional and #!rest. Best regards, Mikael D.
reader-fix.diff
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