diff --git a/autotests/html/brightscript.brs.html b/autotests/html/brightscript.brs.html
--- a/autotests/html/brightscript.brs.html
+++ b/autotests/html/brightscript.brs.html
@@ -104,6 +104,10 @@
 <span style="color:#0057ae;">a</span> = <span style="color:#0057ae;">b</span>.<span style="color:#644a9b;">foo</span>(<span style="color:#bf0303;">&quot;string&quot;</span>,<span style="color:#b08000;">1</span>,{<span style="color:#0057ae;">a</span>:<span style="color:#0057ae;">b</span>},<span style="color:#b08000;">1.5</span>,[<span style="color:#b08000;">1</span>,<span style="color:#b08000;">2</span>,<span style="color:#b08000;">3</span>])
 
 <span style="color:#0057ae;">unnamed_function</span> = <span style="font-weight:bold;">function</span> ( <span style="color:#0057ae;">a</span> <span style="font-weight:bold;">as</span> <span style="color:#0057ae;">Integer</span> ) <span style="font-weight:bold;">as</span> <span style="color:#0057ae;">Float</span>
+
+<span style="color:#0057ae;">a</span> = +-<span style="color:#0057ae;">b</span>
+<span style="color:#0057ae;">a</span> = <span style="color:#b08000;">&amp;h42abcdef</span>
+<span style="color:#0057ae;">c</span> = <span style="color:#0057ae;">var</span>@<span style="color:#0057ae;">attr</span>
 <span style="font-weight:bold;">end function</span>
 
 <span style="color:#0057ae;">unnamed_sub</span> = <span style="font-weight:bold;">sub</span> ( <span style="color:#0057ae;">a</span> <span style="font-weight:bold;">as</span> <span style="color:#0057ae;">Integer</span> ) <span style="font-weight:bold;">as</span> <span style="color:#0057ae;">Void</span>
diff --git a/autotests/input/brightscript.brs b/autotests/input/brightscript.brs
--- a/autotests/input/brightscript.brs
+++ b/autotests/input/brightscript.brs
@@ -98,6 +98,10 @@
 a = b.foo("string",1,{a:b},1.5,[1,2,3])
 
 unnamed_function = function ( a as Integer ) as Float
+
+a = +-b
+a = &h42abcdef
+c = var@attr
 end function
 
 unnamed_sub = sub ( a as Integer ) as Void
diff --git a/autotests/reference/brightscript.brs.ref b/autotests/reference/brightscript.brs.ref
--- a/autotests/reference/brightscript.brs.ref
+++ b/autotests/reference/brightscript.brs.ref
@@ -98,6 +98,10 @@
 <var>a</var><g> </g><assign>=</assign><g> </g><var>b</var><operator>.</operator><func>foo</func><scope>(</scope><string>"string"</string><coma>,</coma><dec>1</dec><coma>,</coma><operator>{</operator><var>a</var><operator>:</operator><var>b</var><operator>}</operator><coma>,</coma><float>1.5</float><coma>,</coma><operator>[</operator><dec>1</dec><coma>,</coma><dec>2</dec><coma>,</coma><dec>3</dec><operator>]</operator><scope>)</scope><br/>
 <g></g><br/>
 <var>unnamed_function</var><g> </g><assign>=</assign><g> </g><keyword>function</keyword><g> </g><scope>(</scope><g> </g><var>a</var><g> </g><keyword>as</keyword><g> </g><type>Integer</type><g> </g><scope>)</scope><g> </g><keyword>as</keyword><g> </g><type>Float</type><br/>
+<g></g><br/>
+<var>a</var><g> </g><assign>=</assign><g> </g><unary>+-</unary><var>b</var><br/>
+<var>a</var><g> </g><assign>=</assign><g> </g><dec>&h42abcdef</dec><br/>
+<var>c</var><g> </g><assign>=</assign><g> </g><var>var</var><operator>@</operator><var>attr</var><br/>
 <keyword>end function</keyword><br/>
 <g></g><br/>
 <var>unnamed_sub</var><g> </g><assign>=</assign><g> </g><keyword>sub</keyword><g> </g><scope>(</scope><g> </g><var>a</var><g> </g><keyword>as</keyword><g> </g><type>Integer</type><g> </g><scope>)</scope><g> </g><keyword>as</keyword><g> </g><type>Void</type><br/>
diff --git a/data/syntax/brightscript.xml b/data/syntax/brightscript.xml
--- a/data/syntax/brightscript.xml
+++ b/data/syntax/brightscript.xml
@@ -4,7 +4,7 @@
 	name="BrightScript"
 	section="Scripts"
 	extensions="*.brs"
-	version="4"
+	version="5"
 	kateversion="5.0"
 	author="Daniel Levin (dendy.ua@gmail.com)"
 	license="MIT">
@@ -599,6 +599,8 @@
 -->
 <context name="rvalue" attribute="g" lineEndContext="#pop" fallthrough="true" fallthroughContext="#pop">
 	<DetectSpaces/>
+	<DetectChar char="-" attribute="unary"/>
+	<DetectChar char="+" attribute="unary"/>
 	<IncludeRules context="@comment"/>
 	<IncludeRules context="@function"/>
 	<IncludeRules context="@sub"/>
@@ -611,6 +613,7 @@
 	<keyword String="constants" attribute="constant" context="#pop!rvalue_operator"/>
 	<RegExpr String="[-+]?[0-9]*\.[0-9]" context="#pop!float" lookAhead="true"/>
 	<RegExpr String="[-+]?[0-9]" context="#pop!int" lookAhead="true"/>
+	<StringDetect String="&amp;h" insensitive="true" attribute="dec" context="#pop!hex"/>
 	<keyword String="m" attribute="m" context="#pop!rvalue_m_dot"/>
 	<IncludeRules context="@rvalue_builtin_functions"/>
 	<IncludeRules context="@rvalue_library_functions"/>
@@ -628,6 +631,7 @@
 <context name="rvalue_operator" attribute="g" lineEndContext="#pop" fallthrough="true" fallthroughContext="#pop!rvalue_end">
 	<DetectSpaces/>
 	<DetectChar char="." attribute="operator" context="#pop!rvalue_dot"/>
+	<DetectChar char="@" attribute="operator" context="#pop!rvalue_dot"/>
 	<IncludeRules context="@rvalue_ops"/>
 </context>
 
@@ -720,6 +724,10 @@
 	<RegExpr String="[-+]?[0-9]*[%&amp;]?" attribute="dec" context="postfix_delimiter"/>
 </context>
 
+<context name="hex" attribute="invalid" lineEndContext="#pop" fallthrough="true" fallthroughContext="#pop">
+	<RegExpr String="[0-9a-fA-F]+" insensitive="true" attribute="dec" context="#pop"/>
+</context>
+
 <context name="postfix_delimiter" attribute="g" lineEndContext="#pop#pop" fallthrough="true" fallthroughContext="#pop#pop">
 	<RegExpr String="[\s\W]" context="#pop#pop!rvalue_operator" lookAhead="true"/>
 </context>