annotate demo/list.ur @ 1739:c414850f206f

Add support for -boot flag, which allows in-tree execution of Ur/Web The boot flag rewrites most hardcoded paths to point to the build directory, and also forces static compilation. This is convenient for developing Ur/Web, or if you cannot 'sudo make install' Ur/Web. The following changes were made: * Header files were moved to include/urweb instead of include; this lets FFI users point their C_INCLUDE_PATH at this directory at write <urweb/urweb.h>. For internal Ur/Web executables, we simply pass -I$PATH/include/urweb as normal. * Differentiate between LIB and SRCLIB; SRCLIB is Ur and JavaScript source files, while LIB is compiled products from libtool. For in-tree compilation these live in different places. * No longer reference Config for paths; instead use Settings; these settings can be changed dynamically by Compiler.enableBoot () (TODO: add a disableBoot function.) * config.h is now generated directly in include/urweb/config.h, for consistency's sake (especially since it gets installed along with the rest of the headers!) * All of the autotools build products got updated. * The linkStatic field in protocols now only contains the name of the build product, and not the absolute path. Future users have to be careful not to reference the Settings files to early, lest they get an old version (this was the source of two bugs during development of this patch.)
author Edward Z. Yang <ezyang@mit.edu>
date Wed, 02 May 2012 17:17:57 -0400
parents 669ac5e9a69e
children
rev   line source
adamc@397 1 datatype list t = Nil | Cons of t * list t
adamc@397 2
adamc@823 3 fun length [t] (ls : list t) =
adamc@501 4 let
adamc@501 5 fun length' (ls : list t) (acc : int) =
adamc@501 6 case ls of
adamc@501 7 Nil => acc
adamc@501 8 | Cons (_, ls') => length' ls' (acc + 1)
adamc@501 9 in
adamc@501 10 length' ls 0
adamc@501 11 end
adamc@397 12
adamc@823 13 fun rev [t] (ls : list t) =
adamc@501 14 let
adamc@501 15 fun rev' (ls : list t) (acc : list t) =
adamc@501 16 case ls of
adamc@501 17 Nil => acc
adamc@501 18 | Cons (x, ls') => rev' ls' (Cons (x, acc))
adamc@501 19 in
adamc@501 20 rev' ls Nil
adamc@501 21 end