[groovy] parse slashy literals as reference expressions (IDEA-194880)

plugins/groovy/groovy-psi/gen/org/jetbrains/plugins/groovy/lang/parser/GroovyGeneratedParser.java

@@ -7566,7 +7566,7 @@ public class GroovyGeneratedParser implements PsiParser, LightPsiParser {
   //                                    | 'this'
   //                                    | 'super'
   //                                    | code_reference_identifiers_soft &(reference_dot | '.&')
-  //                                    | (STR_SQ | STR_DQ) &string_literal_as_reference
+  //                                    | (STR_SQ | STR_DQ | regex_literal) &string_literal_as_reference
   public static boolean unqualified_reference_expression(PsiBuilder b, int l) {
     if (!recursion_guard_(b, l, "unqualified_reference_expression")) return false;
     boolean r;
@@ -7630,7 +7630,7 @@ public class GroovyGeneratedParser implements PsiParser, LightPsiParser {
     return r;
   }
 
-  // (STR_SQ | STR_DQ) &string_literal_as_reference
+  // (STR_SQ | STR_DQ | regex_literal) &string_literal_as_reference
   private static boolean unqualified_reference_expression_4(PsiBuilder b, int l) {
     if (!recursion_guard_(b, l, "unqualified_reference_expression_4")) return false;
     boolean r;
@@ -7641,12 +7641,13 @@ public class GroovyGeneratedParser implements PsiParser, LightPsiParser {
     return r;
   }
 
-  // STR_SQ | STR_DQ
+  // STR_SQ | STR_DQ | regex_literal
   private static boolean unqualified_reference_expression_4_0(PsiBuilder b, int l) {
     if (!recursion_guard_(b, l, "unqualified_reference_expression_4_0")) return false;
     boolean r;
     r = consumeTokenSmart(b, STR_SQ);
     if (!r) r = consumeTokenSmart(b, STR_DQ);
+    if (!r) r = regex_literal(b, l + 1);
     return r;
   }
 

plugins/groovy/groovy-psi/src/org/jetbrains/plugins/groovy/lang/parser/groovy.bnf

@@ -839,7 +839,7 @@ unqualified_reference_expression ::= IDENTIFIER soft_type_argument_list?
                                    | 'this'
                                    | 'super'
                                    | code_reference_identifiers_soft &(reference_dot | '.&')
-                                   | (STR_SQ | STR_DQ) &string_literal_as_reference
+                                   | (STR_SQ | STR_DQ | regex_literal) &string_literal_as_reference
 {
   elementType = reference_expression
 }

plugins/groovy/test/org/jetbrains/plugins/groovy/lang/parser/ExpressionsParsingTest.groovy

@@ -636,6 +636,8 @@ class ExpressionsParsingTest extends GroovyParsingTestCase {
 
   void testcommandExpr$literalInvoked() { doTest() }
 
+  void testcommandExpr$slashyInvoked() { doTest() }
+
   void testcommandExpr$safeIndex() { doTest() }
 
   void testcommandExpr$safeIndexEmpty() { doTest() }

plugins/groovy/testdata/parsing/groovy/expressions/commandExpr/slashyInvoked.test

@@ -0,0 +1,25 @@
+/a/ b
+$/a/$ b
+-----
+Groovy script
+  Call expression
+    Reference expression
+      GroovyASTPsiElementImpl(SLASHY_LITERAL)
+        PsiElement(regex begin)('/')
+        PsiElement(regex content)('a')
+        PsiElement(regex end)('/')
+    PsiWhiteSpace(' ')
+    Command arguments
+      Reference expression
+        PsiElement(identifier)('b')
+  PsiElement(new line)('\n')
+  Call expression
+    Reference expression
+      GroovyASTPsiElementImpl(DOLLAR_SLASHY_LITERAL)
+        PsiElement($/ regex begin)('$/')
+        PsiElement($/ regex content)('a')
+        PsiElement($/ regex end)('/$')
+    PsiWhiteSpace(' ')
+    Command arguments
+      Reference expression
+        PsiElement(identifier)('b')

plugins/groovy/testdata/parsing/groovy/expressions/regex/regex4.test

@@ -3,7 +3,7 @@
 -----
 Groovy script
   Call expression
-    Literal
+    Reference expression
       GroovyASTPsiElementImpl(SLASHY_LITERAL)
         PsiElement(regex begin)('/')
         PsiElement(regex content)('asd\n')