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Speaking of syntax for lambdas: in RiscLua a backslash is a synonym
for "function" and "=>" is a synonym for "return". See:

 http://www.wra1th.plus.com/lua/book/rb04.html

The patch that implements that is just what's contained in the two
"#ifdef GCW_SUGAR" blocks in the file "c/llex" of RiscLua's sources
(<http://www.wra1th.plus.com/lua/zip/Luasrc.zip>); this "c/llex"
corresponds to the file "src/llex.c" in the standard Lua sources.

 Cheers,
   Eduardo Ochs
   eduardoochs@gmail.com
   http://angg.twu.net/