Update a few runtime files.

4 files changed, 60 insertions, 16 deletions

diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index c227d0c4b..294f2670c 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -1,4 +1,4 @@
-*eval.txt*	For Vim version 7.4.  Last change: 2016 Jan 23
+*eval.txt*	For Vim version 7.4.  Last change: 2016 Jan 24
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -1412,6 +1412,9 @@ v:exception	The value of the exception most recently caught and not
 					*v:false* *false-variable*
 v:false		A Number with value zero. Used to put "false" in JSON.  See
 		|jsonencode()|.
+		When used as a string this evaluates to "false". >
+			echo v:false
+<			false ~
 
 					*v:fcs_reason* *fcs_reason-variable*
 v:fcs_reason	The reason why the |FileChangedShell| event was triggered.
@@ -1489,7 +1492,7 @@ v:foldstart	Used for 'foldtext': first line of closed fold.
 v:hlsearch	Variable that indicates whether search highlighting is on. 
 		Setting it makes sense only if 'hlsearch' is enabled which
 		requires |+extra_search|. Setting this variable to zero acts
-		the like |:nohlsearch| command, setting it to one acts like >
+		like the |:nohlsearch| command, setting it to one acts like >
 			let &hlsearch = &hlsearch
 <		Note that the value is restored when returning from a
 		function. |function-search-undo|.
@@ -1549,10 +1552,18 @@ v:mouse_col	Column number for a mouse click obtained with |getchar()|.
 					*v:none* *none-variable*
 v:none		An empty String. Used to put an empty item in JSON.  See
 		|jsonencode()|.
+		When used as a number this evaluates to zero.
+		When used as a string this evaluates to "none". >
+			echo v:none
+<			none ~
 
 					*v:null* *null-variable*
 v:null		An empty String. Used to put "null" in JSON.  See
 		|jsonencode()|.
+		When used as a number this evaluates to zero.
+		When used as a string this evaluates to "null". >
+			echo v:null
+<			null ~
 
 					*v:oldfiles* *oldfiles-variable*
 v:oldfiles	List of file names that is loaded from the |viminfo| file on
@@ -1722,7 +1733,9 @@ v:throwpoint	The point where the exception most recently caught and not
 						*v:true* *true-variable*
 v:true		A Number with value one. Used to put "true" in JSON.  See
 		|jsonencode()|.
-
+		When used as a string this evaluates to "true". >
+			echo v:true
+<			true ~
 						*v:val* *val-variable*
 v:val		Value of the current item of a |List| or |Dictionary|.	Only
 		valid while evaluating the expression used with |map()| and
@@ -4234,17 +4247,26 @@ join({list} [, {sep}])					*join()*
 		The opposite function is |split()|.
 
 jsondecode({string})					*jsondecode()*
-		TODO
+		This parses a JSON formatted string and returns the equivalent
+		in Vim values.  See |jsonencode()| for the relation between
+		JSON and Vim values.
+		The decoding is permissive:
+		- A trailing comma in an array and object is ignored.
+		- An empty item in an array results in v:none.
+		- When an object name is not a string it is converted to a
+		  string.  E.g. the number 123 is used as the string "123".
+		- More floating point numbers are recognized, e.g. "1." for
+		  "1.0".
 
 jsonencode({expr})					*jsonencode()*
-		Encodode {expr} as JSON and return this as a string.
+		Encode {expr} as JSON and return this as a string.
 		The encoding is specified in:
 		http://www.ietf.org/rfc/rfc4627.txt
 		Vim values are converted as follows:
 		   Number		decimal number
 		   Float		floating point number
 		   String		in double quotes (possibly null)
-		   Funcref		nothing
+		   Funcref		not possible, error
 		   List			as an array (possibly null); when
 		   			used recursively: []
 		   Dict			as an object (possibly null); when
@@ -4253,6 +4275,13 @@ jsonencode({expr})					*jsonencode()*
 		   v:true		"true"
 		   v:none		nothing
 		   v:null		"null"
+		Note that using v:none is permitted, although the JSON
+		standard does not allow empty items.  This can be useful for
+		omitting items in an array:
+			[0,,,,,5] ~
+		This is much more efficient than:
+			[0,null,null,null,null,5] ~
+		But a strict JSON parser will not accept it.
 
 keys({dict})						*keys()*
 		Return a |List| with all the keys of {dict}.  The |List| is in
@@ -6615,6 +6644,8 @@ type({expr})	The result is a Number, depending on the type of {expr}:
 			List:	    3
 			Dictionary: 4
 			Float:	    5
+			Boolean:    6 (v:false and v:true)
+			None	    7 (v:null and v:none)
 		To avoid the magic numbers it should be used this way: >
 			:if type(myvar) == type(0)
 			:if type(myvar) == type("")
@@ -6622,6 +6653,8 @@ type({expr})	The result is a Number, depending on the type of {expr}:
 			:if type(myvar) == type([])
 			:if type(myvar) == type({})
 			:if type(myvar) == type(0.0)
+			:if type(myvar) == type(v:false)
+			:if type(myvar) == type(v:none
 
 undofile({name})					*undofile()*
 		Return the name of the undo file that would be used for a file
diff --git a/runtime/doc/if_mzsch.txt b/runtime/doc/if_mzsch.txt
index 388a1ee06..90954d0b4 100644
--- a/runtime/doc/if_mzsch.txt
+++ b/runtime/doc/if_mzsch.txt
@@ -1,4 +1,4 @@
-*if_mzsch.txt*  For Vim version 7.4.  Last change: 2016 Jan 16
+*if_mzsch.txt*  For Vim version 7.4.  Last change: 2016 Jan 24
 
 
 		  VIM REFERENCE MANUAL    by Sergey Khorev
@@ -265,7 +265,7 @@ directly from Scheme. For instance: >
 <
 
 ==============================================================================
-7. Dynamic loading				    *mzscheme-dynamic* *E815*
+7. Dynamic loading				*mzscheme-dynamic* *E815*
 
 On MS-Windows the MzScheme libraries can be loaded dynamically. The |:version|
 output then includes |+mzscheme/dyn|.
@@ -294,7 +294,7 @@ to set the environment variable as the following: >
   PLTCONFIGDIR=C:\Racket63\etc
 <
 ==============================================================================
-8. MzScheme setup				    *mzscheme-setup*
+8. MzScheme setup				    *mzscheme-setup* *E895*
 
 Vim requires "racket/base" module for if_mzsch core (fallback to "scheme/base"
 if it doesn't exist), "r5rs" module for test and "raco ctool" command for
diff --git a/runtime/doc/tags b/runtime/doc/tags
index 38c251b2b..74c0d018e 100644
--- a/runtime/doc/tags
+++ b/runtime/doc/tags
@@ -4422,6 +4422,7 @@ E891	eval.txt	/*E891*
 E892	eval.txt	/*E892*
 E893	eval.txt	/*E893*
 E894	eval.txt	/*E894*
+E895	if_mzsch.txt	/*E895*
 E90	message.txt	/*E90*
 E91	options.txt	/*E91*
 E92	message.txt	/*E92*
@@ -5730,6 +5731,7 @@ extend()	eval.txt	/*extend()*
 extension-removal	cmdline.txt	/*extension-removal*
 extensions-improvements	todo.txt	/*extensions-improvements*
 f	motion.txt	/*f*
+false-variable	eval.txt	/*false-variable*
 faq	intro.txt	/*faq*
 farsi	farsi.txt	/*farsi*
 farsi-fonts	farsi.txt	/*farsi-fonts*
@@ -6786,6 +6788,8 @@ javascript-cinoptions	indent.txt	/*javascript-cinoptions*
 javascript-indenting	indent.txt	/*javascript-indenting*
 join()	eval.txt	/*join()*
 jsbterm-mouse	options.txt	/*jsbterm-mouse*
+jsondecode()	eval.txt	/*jsondecode()*
+jsonencode()	eval.txt	/*jsonencode()*
 jtags	tagsrch.txt	/*jtags*
 jump-motions	motion.txt	/*jump-motions*
 jumplist	motion.txt	/*jumplist*
@@ -7435,6 +7439,7 @@ no-eval-feature	eval.txt	/*no-eval-feature*
 no_buffers_menu	gui.txt	/*no_buffers_menu*
 non-greedy	pattern.txt	/*non-greedy*
 non-zero-arg	eval.txt	/*non-zero-arg*
+none-variable	eval.txt	/*none-variable*
 normal-index	index.txt	/*normal-index*
 not-compatible	usr_01.txt	/*not-compatible*
 not-edited	editing.txt	/*not-edited*
@@ -7442,6 +7447,7 @@ notation	intro.txt	/*notation*
 notepad	gui_w32.txt	/*notepad*
 nr2char()	eval.txt	/*nr2char()*
 nroff.vim	syntax.txt	/*nroff.vim*
+null-variable	eval.txt	/*null-variable*
 number_relativenumber	options.txt	/*number_relativenumber*
 numbered-function	eval.txt	/*numbered-function*
 o	insert.txt	/*o*
@@ -8509,6 +8515,7 @@ toolbar-icon	gui.txt	/*toolbar-icon*
 toupper()	eval.txt	/*toupper()*
 tr()	eval.txt	/*tr()*
 trojan-horse	starting.txt	/*trojan-horse*
+true-variable	eval.txt	/*true-variable*
 trunc()	eval.txt	/*trunc()*
 try-conditionals	eval.txt	/*try-conditionals*
 try-echoerr	eval.txt	/*try-echoerr*
@@ -8618,6 +8625,7 @@ v:dying	eval.txt	/*v:dying*
 v:errmsg	eval.txt	/*v:errmsg*
 v:errors	eval.txt	/*v:errors*
 v:exception	eval.txt	/*v:exception*
+v:false	eval.txt	/*v:false*
 v:fcs_choice	eval.txt	/*v:fcs_choice*
 v:fcs_reason	eval.txt	/*v:fcs_reason*
 v:fname_diff	eval.txt	/*v:fname_diff*
@@ -8637,6 +8645,8 @@ v:lnum	eval.txt	/*v:lnum*
 v:mouse_col	eval.txt	/*v:mouse_col*
 v:mouse_lnum	eval.txt	/*v:mouse_lnum*
 v:mouse_win	eval.txt	/*v:mouse_win*
+v:none	eval.txt	/*v:none*
+v:null	eval.txt	/*v:null*
 v:oldfiles	eval.txt	/*v:oldfiles*
 v:operator	eval.txt	/*v:operator*
 v:option_new	eval.txt	/*v:option_new*
@@ -8658,6 +8668,7 @@ v:swapname	eval.txt	/*v:swapname*
 v:termresponse	eval.txt	/*v:termresponse*
 v:this_session	eval.txt	/*v:this_session*
 v:throwpoint	eval.txt	/*v:throwpoint*
+v:true	eval.txt	/*v:true*
 v:val	eval.txt	/*v:val*
 v:var	eval.txt	/*v:var*
 v:version	eval.txt	/*v:version*
diff --git a/runtime/indent/vim.vim b/runtime/indent/vim.vim
index 7511325af..31b76b8c0 100644
--- a/runtime/indent/vim.vim
+++ b/runtime/indent/vim.vim
@@ -1,7 +1,7 @@
 " Vim indent file
 " Language:	Vim script
 " Maintainer:	Bram Moolenaar <Bram@vim.org>
-" Last Change:	2014 Dec 12
+" Last Change:	2016 Jan 24
 
 " Only load this indent file when no other was loaded.
 if exists("b:did_indent")
@@ -58,19 +58,19 @@ function GetVimIndentIntern()
     if exists("g:vim_indent_cont")
       let ind = ind + g:vim_indent_cont
     else
-      let ind = ind + &sw * 3
+      let ind = ind + shiftwidth() * 3
     endif
   elseif prev_text =~ '^\s*aug\%[roup]' && prev_text !~ '^\s*aug\%[roup]\s*!\=\s\+END'
-    let ind = ind + &sw
+    let ind = ind + shiftwidth()
   else
     " A line starting with :au does not increment/decrement indent.
     if prev_text !~ '^\s*au\%[tocmd]'
       let i = match(prev_text, '\(^\||\)\s*\(if\|wh\%[ile]\|for\|try\|cat\%[ch]\|fina\%[lly]\|fu\%[nction]\|el\%[seif]\)\>')
       if i >= 0
-	let ind += &sw
+	let ind += shiftwidth()
 	if strpart(prev_text, i, 1) == '|' && has('syntax_items')
 	      \ && synIDattr(synID(lnum, i, 1), "name") =~ '\(Comment\|String\)$'
-	  let ind -= &sw
+	  let ind -= shiftwidth()
 	endif
       endif
     endif
@@ -82,7 +82,7 @@ function GetVimIndentIntern()
   let i = match(prev_text, '[^\\]|\s*\(ene\@!\)')
   if i > 0 && prev_text !~ '^\s*au\%[tocmd]'
     if !has('syntax_items') || synIDattr(synID(lnum, i + 2, 1), "name") !~ '\(Comment\|String\)$'
-      let ind = ind - &sw
+      let ind = ind - shiftwidth()
     endif
   endif
 
@@ -90,7 +90,7 @@ function GetVimIndentIntern()
   " Subtract a 'shiftwidth' on a :endif, :endwhile, :catch, :finally, :endtry,
   " :endfun, :else and :augroup END.
   if cur_text =~ '^\s*\(ene\@!\|cat\|fina\|el\|aug\%[roup]\s*!\=\s\+[eE][nN][dD]\)'
-    let ind = ind - &sw
+    let ind = ind - shiftwidth()
   endif
 
   return ind