Robot: accept regex in embedded arguments

Close #1572.

Units/parser-robot.r/keyword-started-from-varref.d/expected.tags

@@ -3,15 +3,31 @@ My Regular Keyword	input.robot	/^My Regular Keyword$/;"	k
 My_Regular_Keyword	input.robot	/^My Regular Keyword$/;"	k
 ${embedded arg} Starting Single	input.robot	/^${embedded arg} Starting Single$/;"	k
 ${embedded_arg}_Starting_Single	input.robot	/^${embedded arg} Starting Single$/;"	k
+${e} Starting Single Letter	input.robot	/^${e} Starting Single Letter$/;"	k
+${e}_Starting_Single_Letter	input.robot	/^${e} Starting Single Letter$/;"	k
+${embedded arg:value1|value2} Starting Single With Regex	input.robot	/^${embedded arg:value1|value2} Starting Single With Regex$/;"	k
+${embedded_arg:value1|value2}_Starting_Single_With_Regex	input.robot	/^${embedded arg:value1|value2} Starting Single With Regex$/;"	k
 ${embedded arg1} Starting ${embedded arg2} Multiple	input.robot	/^${embedded arg1} Starting ${embedded arg2} Multiple$/;"	k
 ${embedded_arg1}_Starting_${embedded_arg2}_Multiple	input.robot	/^${embedded arg1} Starting ${embedded arg2} Multiple$/;"	k
+${embedded arg1} Starting ${embedded arg2:value1|value2} Multiple With Regex	input.robot	/^${embedded arg1} Starting ${embedded arg2:value1|value2} Multiple With Regex$/;"	k
+${embedded_arg1}_Starting_${embedded_arg2:value1|value2}_Multiple_With_Regex	input.robot	/^${embedded arg1} Starting ${embedded arg2:value1|value2} Multiple With Regex$/;"	k
 ${embedded arg1} Starting And ${embedded arg2} Ending ${embedded arg3}	input.robot	/^${embedded arg1} Starting And ${embedded arg2} Ending ${embedded arg3}$/;"	k
 ${embedded_arg1}_Starting_And_${embedded_arg2}_Ending_${embedded_arg3}	input.robot	/^${embedded arg1} Starting And ${embedded arg2} Ending ${embedded arg3}$/;"	k
 Middle ${embedded arg} Single Arguments	input.robot	/^Middle ${embedded arg} Single Arguments$/;"	k
 Middle_${embedded_arg}_Single_Arguments	input.robot	/^Middle ${embedded arg} Single Arguments$/;"	k
 Middle ${embedded arg1} Multiple ${embedded arg2} Arguments	input.robot	/^Middle ${embedded arg1} Multiple ${embedded arg2} Arguments$/;"	k
 Middle_${embedded_arg1}_Multiple_${embedded_arg2}_Arguments	input.robot	/^Middle ${embedded arg1} Multiple ${embedded arg2} Arguments$/;"	k
+Middle ${embedded arg:value1|value2} Single Arguments With Regex	input.robot	/^Middle ${embedded arg:value1|value2} Single Arguments With Regex$/;"	k
+Middle_${embedded_arg:value1|value2}_Single_Arguments_With_Regex	input.robot	/^Middle ${embedded arg:value1|value2} Single Arguments With Regex$/;"	k
+Middle ${e} Single Letter Arguments	input.robot	/^Middle ${e} Single Letter Arguments$/;"	k
+Middle_${e}_Single_Letter_Arguments	input.robot	/^Middle ${e} Single Letter Arguments$/;"	k
 Ending Single ${embedded arg}	input.robot	/^Ending Single ${embedded arg}$/;"	k
 Ending_Single_${embedded_arg}	input.robot	/^Ending Single ${embedded arg}$/;"	k
 Ending Multiple ${embedded arg1} And ${embedded arg2}	input.robot	/^Ending Multiple ${embedded arg1} And ${embedded arg2}$/;"	k
 Ending_Multiple_${embedded_arg1}_And_${embedded_arg2}	input.robot	/^Ending Multiple ${embedded arg1} And ${embedded arg2}$/;"	k
+My Keyword_with_underscore-and-dashes	input.robot	/^My Keyword_with_underscore-and-dashes$/;"	k
+My Keyword with underscore-and-dashes	input.robot	/^My Keyword_with_underscore-and-dashes$/;"	k
+My Keyword_With $ dollar sign	input.robot	/^My Keyword_With $ dollar sign$/;"	k
+My Keyword With $ dollar sign	input.robot	/^My Keyword_With $ dollar sign$/;"	k
+My Test With Template1	input.robot	/^My Test With Template1        My Kw 1        My Kw 2$/;"	t
+My_Test_With_Template1	input.robot	/^My Test With Template1        My Kw 1        My Kw 2$/;"	t

Units/parser-robot.r/keyword-started-from-varref.d/input.robot

@@ -1,7 +1,8 @@
 #
-# This test input is taken from #1570 opened by @mMontu.
+# This test input is taken from #1572 opened by @mMontu.
 #
 *** Variables ***
+
 ${myvar}    variable_value
 
 *** Keywords ***
@@ -12,9 +13,19 @@ My Regular Keyword
 ${embedded arg} Starting Single
     No Operation
 
+${e} Starting Single Letter
+    No Operation
+
+
+${embedded arg:value1|value2} Starting Single With Regex
+    No Operation
+
 ${embedded arg1} Starting ${embedded arg2} Multiple
     No Operation
 
+${embedded arg1} Starting ${embedded arg2:value1|value2} Multiple With Regex
+    No Operation
+
 ${embedded arg1} Starting And ${embedded arg2} Ending ${embedded arg3}
     No Operation
 
@@ -24,8 +35,24 @@ Middle ${embedded arg} Single Arguments
 Middle ${embedded arg1} Multiple ${embedded arg2} Arguments
     No Operation
 
+Middle ${embedded arg:value1|value2} Single Arguments With Regex
+    No Operation
+
+Middle ${e} Single Letter Arguments
+    No Operation
+
 Ending Single ${embedded arg}
     No Operation
 
 Ending Multiple ${embedded arg1} And ${embedded arg2}
     No Operation
+
+My Keyword_with_underscore-and-dashes
+    No Operation
+
+My Keyword_With $ dollar sign
+    No Operation
+
+*** Test Cases ***
+
+My Test With Template1        My Kw 1        My Kw 2

parsers/robot.c

@@ -144,7 +144,7 @@ static void initialize (const langType language)
 
     addLanguageCallbackRegex (
 		language,
-		"(^([A-Za-z0-9]+|\\$\\{[_A-Za-z0-9][' _A-Za-z0-9]+\\})([${}' _][-${}A-Za-z0-9]+)*)",
+		"(^([A-Za-z0-9]+|\\$\\{[_A-Za-z0-9][' _A-Za-z0-9]*(:([^}]|\\\\|)+)*\\})([${}' _]([-_$A-Za-z0-9]+|\\{[_A-Za-z0-9][' _A-Za-z0-9]*(:([^}]|\\\\|)+)*\\})+)*)",
 		"{exclusive}", tagKeywordsAndTestCases, NULL, NULL);
 
     addLanguageCallbackRegex (language, "^[$@]\\{([_A-Za-z0-9][' _A-Za-z0-9]+)\\}  [ ]*.+",