runtime(java): Improve the recognition of literals (#14120)

* Emend the Unicode and octal escape sequence patterns;
* Accept the (repeated) underscore separators in all
  numerical literals;
* Recognise hexadecimal floating-point literals.

(The space escape sequence '\s' will be introduced along
with text blocks in another PR.)

References:
https://docs.oracle.com/javase/specs/jls/se17/html/jls-3.html#jls-3.3
https://docs.oracle.com/javase/specs/jls/se17/html/jls-3.html#jls-3.10.1
https://docs.oracle.com/javase/specs/jls/se17/html/jls-3.html#jls-3.10.2
https://docs.oracle.com/javase/specs/jls/se17/html/jls-3.html#jls-3.10.7


Signed-off-by: Aliaksei Budavei <0x000c70@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

17 files changed, 518 insertions, 16 deletions

diff --git a/runtime/syntax/java.vim b/runtime/syntax/java.vim
index 1b940ebd39..aec2955533 100644
--- a/runtime/syntax/java.vim
+++ b/runtime/syntax/java.vim
@@ -2,7 +2,7 @@
 " Language:	Java
 " Maintainer:	Claudio Fleiner <claudio@fleiner.com>
 " URL:          https://github.com/fleiner/vim/blob/master/runtime/syntax/java.vim
-" Last Change:	2024 Feb 27
+" Last Change:	2024 Mar 01
 
 " Please check :help java.vim for comments on some of the options available.
 
@@ -226,20 +226,28 @@ syn match   javaComment		 "/\*\*/"
 " Strings and constants
 syn match   javaSpecialError	 contained "\\."
 syn match   javaSpecialCharError contained "[^']"
-syn match   javaSpecialChar	 contained "\\\([4-9]\d\|[0-3]\d\d\|[\"\\'ntbrf]\|u\x\{4\}\)"
+" Escape Sequences (JLS-17, §3.10.7):
+syn match   javaSpecialChar	 contained "\\\%(u\x\x\x\x\|[0-3]\o\o\|\o\o\=\|[btnfr"'\\]\)"
 syn region  javaString		start=+"+ end=+"+ end=+$+ contains=javaSpecialChar,javaSpecialError,@Spell
-" next line disabled, it can cause a crash for a long line
+" The next line is commented out, it can cause a crash for a long line
 "syn match   javaStringError	  +"\([^"\\]\|\\.\)*$+
 syn match   javaCharacter	 "'[^']*'" contains=javaSpecialChar,javaSpecialCharError
 syn match   javaCharacter	 "'\\''" contains=javaSpecialChar
 syn match   javaCharacter	 "'[^\\]'"
-syn match   javaNumber		 "\<\(0[bB][0-1]\+\|0[0-7]*\|0[xX]\x\+\|\d\(\d\|_\d\)*\)[lL]\=\>"
-syn match   javaNumber		 "\(\<\d\(\d\|_\d\)*\.\(\d\(\d\|_\d\)*\)\=\|\.\d\(\d\|_\d\)*\)\([eE][-+]\=\d\(\d\|_\d\)*\)\=[fFdD]\="
-syn match   javaNumber		 "\<\d\(\d\|_\d\)*[eE][-+]\=\d\(\d\|_\d\)*[fFdD]\=\>"
-syn match   javaNumber		 "\<\d\(\d\|_\d\)*\([eE][-+]\=\d\(\d\|_\d\)*\)\=[fFdD]\>"
-
-" unicode characters
-syn match   javaSpecial "\\u\d\{4\}"
+" Integer literals (JLS-17, §3.10.1):
+syn keyword javaNumber		 0 0l 0L
+syn match   javaNumber		 "\<\%(0\%([xX]\x\%(_*\x\)*\|_*\o\%(_*\o\)*\|[bB][01]\%(_*[01]\)*\)\|[1-9]\%(_*\d\)*\)[lL]\=\>"
+" Decimal floating-point literals (JLS-17, §3.10.2):
+" Against "\<\d\+\>\.":
+syn match   javaNumber		 "\<\d\%(_*\d\)*\."
+syn match   javaNumber		 "\%(\<\d\%(_*\d\)*\.\%(\d\%(_*\d\)*\)\=\|\.\d\%(_*\d\)*\)\%([eE][-+]\=\d\%(_*\d\)*\)\=[fFdD]\=\>"
+syn match   javaNumber		 "\<\d\%(_*\d\)*[eE][-+]\=\d\%(_*\d\)*[fFdD]\=\>"
+syn match   javaNumber		 "\<\d\%(_*\d\)*\%([eE][-+]\=\d\%(_*\d\)*\)\=[fFdD]\>"
+" Hexadecimal floating-point literals (JLS-17, §3.10.2):
+syn match   javaNumber		 "\<0[xX]\%(\x\%(_*\x\)*\.\=\|\%(\x\%(_*\x\)*\)\=\.\x\%(_*\x\)*\)[pP][-+]\=\d\%(_*\d\)*[fFdD]\=\>"
+
+" Unicode characters
+syn match   javaSpecial "\\u\x\x\x\x"
 
 syn cluster javaTop add=javaString,javaCharacter,javaNumber,javaSpecial,javaStringError
 
@@ -265,16 +273,19 @@ endif
 if exists("java_highlight_debug")
 
   " Strings and constants
-  syn match   javaDebugSpecial		contained "\\\d\d\d\|\\."
+  syn match   javaDebugSpecial		contained "\\\%(u\x\x\x\x\|[0-3]\o\o\|\o\o\=\|[btnfr"'\\]\)"
   syn region  javaDebugString		contained start=+"+  end=+"+  contains=javaDebugSpecial
-  syn match   javaDebugStringError	+"\([^"\\]\|\\.\)*$+
+  syn match   javaDebugStringError	contained +"\%([^"\\]\|\\.\)*$+
   syn match   javaDebugCharacter	contained "'[^\\]'"
   syn match   javaDebugSpecialCharacter contained "'\\.'"
   syn match   javaDebugSpecialCharacter contained "'\\''"
-  syn match   javaDebugNumber		contained "\<\(0[0-7]*\|0[xX]\x\+\|\d\+\)[lL]\=\>"
-  syn match   javaDebugNumber		contained "\(\<\d\+\.\d*\|\.\d\+\)\([eE][-+]\=\d\+\)\=[fFdD]\="
-  syn match   javaDebugNumber		contained "\<\d\+[eE][-+]\=\d\+[fFdD]\=\>"
-  syn match   javaDebugNumber		contained "\<\d\+\([eE][-+]\=\d\+\)\=[fFdD]\>"
+  syn keyword javaDebugNumber		contained 0 0l 0L
+  syn match   javaNumber		contained "\<\d\%(_*\d\)*\."
+  syn match   javaDebugNumber		contained "\<\%(0\%([xX]\x\%(_*\x\)*\|_*\o\%(_*\o\)*\|[bB][01]\%(_*[01]\)*\)\|[1-9]\%(_*\d\)*\)[lL]\=\>"
+  syn match   javaDebugNumber		contained "\%(\<\d\%(_*\d\)*\.\%(\d\%(_*\d\)*\)\=\|\.\d\%(_*\d\)*\)\%([eE][-+]\=\d\%(_*\d\)*\)\=[fFdD]\=\>"
+  syn match   javaDebugNumber		contained "\<\d\%(_*\d\)*[eE][-+]\=\d\%(_*\d\)*[fFdD]\=\>"
+  syn match   javaDebugNumber		contained "\<\d\%(_*\d\)*\%([eE][-+]\=\d\%(_*\d\)*\)\=[fFdD]\>"
+  syn match   javaDebugNumber		contained "\<0[xX]\%(\x\%(_*\x\)*\.\=\|\%(\x\%(_*\x\)*\)\=\.\x\%(_*\x\)*\)[pP][-+]\=\d\%(_*\d\)*[fFdD]\=\>"
   syn keyword javaDebugBoolean		contained true false
   syn keyword javaDebugType		contained null this super
   syn region javaDebugParen  start=+(+ end=+)+ contained contains=javaDebug.*,javaDebugParen
diff --git a/runtime/syntax/testdir/dumps/java_escapes_00.dump b/runtime/syntax/testdir/dumps/java_escapes_00.dump
new file mode 100644
index 0000000000..3db803d41e
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_escapes_00.dump
@@ -0,0 +1,20 @@
+>c+0#00e0003#ffffff0|l|a|s@1| +0#0000000&|E|s|c|a|p|e|s|T|e|s|t|s| @56
+|{| @2|/+0#0000e05&@1| |j|a|v|a|p| |-|c|o|n|s|t|a|n|t|s| |E|s|c|a|p|e|s|T|e|s|t|s|.|c|l|a|s@1| +0#0000000&@32
+@4|/+0#0000e05&@1| |s|t|a|t|i|c| |f|i|n|a|l| |S|t|r|i|n|g| |h|e|l@1|o| |=| |"|h|e|l@1|o|"|;| +0#0000000&@31
+@4|\+0#e000e06&|u|0@1|7|3|\|u|0@1|7|4|\|u|0@1|6|1|\|u|0@1|7|4|\|u|0@1|6|9|\|u|0@1|6|3| +0#0000000&@34
+@4|\+0#e000e06&|u|0@1|6@1|\|u|0@1|6|9|\|u|0@1|6|e|\|u|0@1|6|1|\|u|0@1|6|c| +0#0000000&@40
+@4|\+0#e000e06&|u|0@1|5|3|\|u|0@1|7|4|\|u|0@1|7|2|\|u|0@1|6|9|\|u|0@1|6|e|\|u|0@1|6|7| +0#0000000&@34
+@4|\+0#e000e06&|u|0@1|6|8|\|u|0@1|6|5|\|u|0@1|6|c|\|u|0@1|6|c|\|u|0@1|6|f| +0#0000000&@40
+@4|\+0#e000e06&|u|0@1|3|d| +0#0000000&@64
+@4|\+0#e000e06&|u|0@1|2@1|\|u|0@1|6|8|\|u|0@1|6|5|\|u|0@1|6|c|\|u|0@1|6|c|\|u|0@1|6|f|\|u|0@1|2@1| +0#0000000&@28
+@4|\+0#e000e06&|u|0@1|3|b| +0#0000000&@64
+@75
+@4|s+0#00e0003&|t|a|t|i|c| +0#0000000&|{| @62
+@8|c+0#00e0003&|h|a|r| +0#0000000&|e@1|[|]| |=| |{| @53
+@12|'+0#e000002&|\+0#e000e06&|b|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|t|'+0#e000002&|,+0#0000000&| @51
+@12|'+0#e000002&|\+0#e000e06&|n|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|f|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|r|'+0#e000002&|,+0#0000000&| @45
+@12|'+0#e000002&|\+0#e000e06&|"|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|'|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&@1|'+0#e000002&|,+0#0000000&| @45
+@8|}|;| @64
+@75
+@8|S|y|s|t|e|m|.|o|u|t|.|p|r|i|n|t|l|n|(|n+0#af5f00255&|e|w| +0#0000000&|S|t|r|i|n|g|[|]| |{| @33
+@57|1|,|1| @10|T|o|p| 
diff --git a/runtime/syntax/testdir/dumps/java_escapes_01.dump b/runtime/syntax/testdir/dumps/java_escapes_01.dump
new file mode 100644
index 0000000000..8d2c395ad7
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_escapes_01.dump
@@ -0,0 +1,20 @@
+| +0&#ffffff0@11|'+0#e000002&|\+0#e000e06&|b|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|t|'+0#e000002&|,+0#0000000&| @51
+@12|'+0#e000002&|\+0#e000e06&|n|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|f|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|r|'+0#e000002&|,+0#0000000&| @45
+@12|'+0#e000002&|\+0#e000e06&|"|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|'|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&@1|'+0#e000002&|,+0#0000000&| @45
+@8|}|;| @64
+@75
+@8>S|y|s|t|e|m|.|o|u|t|.|p|r|i|n|t|l|n|(|n+0#af5f00255&|e|w| +0#0000000&|S|t|r|i|n|g|[|]| |{| @33
+@12|"+0#e000002&|\+0#e000e06&|b|"+0#e000002&|,+0#0000000&| |"+0#e000002&|\+0#e000e06&|t|"+0#e000002&|,+0#0000000&| @51
+@12|"+0#e000002&|\+0#e000e06&|n|"+0#e000002&|,+0#0000000&| |"+0#e000002&|\+0#e000e06&|f|"+0#e000002&|,+0#0000000&| |"+0#e000002&|\+0#e000e06&|r|"+0#e000002&|,+0#0000000&| @45
+@12|"+0#e000002&|\+0#e000e06&|"|"+0#e000002&|,+0#0000000&| |"+0#e000002&|\+0#e000e06&|'|"+0#e000002&|,+0#0000000&| |"+0#e000002&|\+0#e000e06&@1|"+0#e000002&|,+0#0000000&| @45
+@8|}|)|;| @63
+@75
+@8|c+0#00e0003&|h|a|r| +0#0000000&|o@1|[|]| |=| |{| @53
+@12|'+0#e000002&|\+0#e000e06&|0|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|1|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|2|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|3|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|4|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|5|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|6|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|7|'+0#e000002&|,+0#0000000&| @15
+@75
+@8|'+0#e000002&|\+0#e000e06&|0@1|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|0|1|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|0|2|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|0|3|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|0|4|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|0|5|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|0|6|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|0|7|'+0#e000002&|,+0#0000000&| @11
+@75
+@4|'+0#e000002&|\+0#e000e06&|0@2|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|0@1|1|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|0@1|2|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|0@1|3|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|0@1|4|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|0@1|5|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|0@1|6|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|0@1|7|'+0#e000002&|,+0#0000000&| @7
+@75
+@8|'+0#e000002&|\+0#e000e06&|1|0|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|1@1|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|1|2|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|1|3|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|1|4|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|1|5|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|1|6|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|1|7|'+0#e000002&|,+0#0000000&| @11
+@57|1|9|,|3|-|9| @7|1|2|%| 
diff --git a/runtime/syntax/testdir/dumps/java_escapes_02.dump b/runtime/syntax/testdir/dumps/java_escapes_02.dump
new file mode 100644
index 0000000000..da8b1a975a
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_escapes_02.dump
@@ -0,0 +1,20 @@
+| +0&#ffffff0@7|'+0#e000002&|\+0#e000e06&|1|0|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|1@1|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|1|2|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|1|3|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|1|4|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|1|5|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|1|6|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|1|7|'+0#e000002&|,+0#0000000&| @11
+@8|'+0#e000002&|\+0#e000e06&|2|0|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|2|1|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|2@1|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|2|3|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|2|4|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|2|5|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|2|6|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|2|7|'+0#e000002&|,+0#0000000&| @11
+@8|'+0#e000002&|\+0#e000e06&|3|0|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|3|1|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|3|2|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|3@1|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|3|4|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|3|5|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|3|6|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|3|7|'+0#e000002&|,+0#0000000&| @11
+@8|'+0#e000002&|\+0#e000e06&|4|0|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|4|1|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|4|2|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|4|3|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|4@1|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|4|5|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|4|6|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|4|7|'+0#e000002&|,+0#0000000&| @11
+@8|'+0#e000002&|\+0#e000e06&|5|0|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|5|1|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|5|2|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|5|3|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|5|4|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|5@1|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|5|6|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|5|7|'+0#e000002&|,+0#0000000&| @11
+@8>'+0#e000002&|\+0#e000e06&|6|0|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|6|1|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|6|2|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|6|3|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|6|4|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|6|5|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|6@1|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|6|7|'+0#e000002&|,+0#0000000&| @11
+@8|'+0#e000002&|\+0#e000e06&|7|0|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|7|1|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|7|2|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|7|3|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|7|4|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|7|5|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|7|6|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|7@1|'+0#e000002&|,+0#0000000&| @11
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diff --git a/runtime/syntax/testdir/dumps/java_escapes_03.dump b/runtime/syntax/testdir/dumps/java_escapes_03.dump
new file mode 100644
index 0000000000..920ab1c338
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_escapes_03.dump
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diff --git a/runtime/syntax/testdir/dumps/java_escapes_04.dump b/runtime/syntax/testdir/dumps/java_escapes_04.dump
new file mode 100644
index 0000000000..79f11f1f03
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_escapes_04.dump
@@ -0,0 +1,20 @@
+| +0&#ffffff0@3|'+0#e000002&|\+0#e000e06&|3|4|0|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|3|4|1|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|3|4|2|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|3|4|3|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|3|4@1|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|3|4|5|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|3|4|6|'+0#e000002&|,+0#0000000&| |'+0#e000002&|\+0#e000e06&|3|4|7|'+0#e000002&|,+0#0000000&| @7
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+@8|}|;| @64
+> @74
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diff --git a/runtime/syntax/testdir/dumps/java_escapes_05.dump b/runtime/syntax/testdir/dumps/java_escapes_05.dump
new file mode 100644
index 0000000000..487198affc
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/java_escapes_05.dump
@@ -0,0 +1,20 @@
+| +0&#ffffff0@7|"+0#e000002&|\+0#e000e06&|6|0|"+0#e000002&|,+0#0000000&| |"+0#e000002&|\+0#e000e06&|6|1|"+0#e000002&|,+0#0000000&| |"+0#e000002&|\+0#e000e06&|6|2|"+0#e000002&|,+0#0000000&| |"+0#e000002&|\+0#e000e06&|6|3|"+0#e000002&|,+0#0000000&| |"+0#e000002&|\+0#e000e06&|6|4|"+0#e000002&|,+0#0000000&| |"+0#e000002&|\+0#e000e06&|6|5|"+0#e000002&|,+0#0000000&| |"+0#e000002&|\+0#e000e06&|6@1|"+0#e000002&|,+0#0000000&| |"+0#e000002&|\+0#e000e06&|6|7|"+0#e000002&|,+0#0000000&| @11
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