patch 8.0.0020

Problem:    The regexp engines are not reentrant.
Solution:   Add regexec_T and save/restore the state when needed.

Author: brammool

runtime/doc/change.txt

@@ -1,4 +1,4 @@
-*change.txt*    For Vim version 8.0.  Last change: 2016 Sep 11
+*change.txt*    For Vim version 8.0.  Last change: 2016 Oct 02
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -913,8 +913,7 @@ Exceptions:
 Substitute with an expression			*sub-replace-expression*
 						*sub-replace-\=* *s/\=*
 When the substitute string starts with "\=" the remainder is interpreted as an
-expression.  This does not work recursively: a |substitute()| function inside
-the expression cannot use "\=" for the substitute string.
+expression.
 
 The special meaning for characters as mentioned at |sub-replace-special| does
 not apply except for "<CR>".  A <NL> character is used as a line break, you

runtime/doc/eval.txt

@@ -1,4 +1,4 @@
-*eval.txt*	For Vim version 8.0.  Last change: 2016 Sep 28
+*eval.txt*	For Vim version 8.0.  Last change: 2016 Oct 02
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -6168,9 +6168,9 @@ range({expr} [, {max} [, {stride}]])				*range()*
 							*readfile()*
 readfile({fname} [, {binary} [, {max}]])
 		Read file {fname} and return a |List|, each line of the file
-		as an item.  Lines broken at NL characters.  Macintosh files
-		separated with CR will result in a single long line (unless a
-		NL appears somewhere).
+		as an item.  Lines are broken at NL characters.  Macintosh
+		files separated with CR will result in a single long line
+		(unless a NL appears somewhere).
 		All NUL characters are replaced with a NL character.
 		When {binary} contains "b" binary mode is used:
 		- When the last line ends in a NL an extra empty list item is
@@ -7390,6 +7390,9 @@ submatch({nr}[, {list}])			*submatch()* *E935*
 		|substitute()| this list will always contain one or zero
 		items, since there are no real line breaks.
 
+		When substitute() is used recursively only the submatches in
+		the current (deepest) call can be obtained.
+
 		Example: >
 			:s/\d\+/\=submatch(0) + 1/
 <		This finds the first number in the line and adds one to it.