fix parsing method call starting with 'crate'

Author: elegoff

community-rust-frontend/src/main/java/org/sonar/rust/RustGrammar.java

@@ -1994,7 +1994,7 @@ public static void lexicalpath(LexerlessGrammarBuilder b) {
         b.rule(PATH_IDENT_SEGMENT).is(b.firstOf(
                 b.sequence(RustKeyword.KW_SUPER, b.nextNot(IDENTIFIER)),
                 b.regexp("^[sS]elf$"),
-                RustKeyword.KW_CRATE,
+                b.sequence(RustKeyword.KW_CRATE,b.nextNot(IDENTIFIER)),
                 b.regexp(DOLLAR_CRATE_REGEX),
                 IDENTIFIER
         ));

community-rust-frontend/src/test/java/org/sonar/rust/RustLexerTest.java

@@ -68,7 +68,7 @@ public void testTokens() {
 
     @Test
     public void testParsing() {
-        String sexpr = "*bar == None { true };";
+        String sexpr = "crate_root.call(me);";
 
         //Print out Ast node content for debugging purpose
 

community-rust-frontend/src/test/java/org/sonar/rust/parser/expressions/MethodCallExpressionTest.java

@@ -57,7 +57,7 @@ public void testMethodCallExpression() {
                 .matches("mystruct.myfield")
                 .matches("other.major")
                 .matches("foo().x")
-                //FIXME.matches("(Struct {a: 10, b: 20}).a")
+                .matches("(Struct {a: 10, b: 20}).a")
                 .matches("t.get_error_class")
                 .matches("state.borrow().get_error_class_fn")
                 .matches("self.get_cache_filename(url)")
@@ -170,6 +170,7 @@ public void testMethodCallExpression() {
                 .matches("a321.into()")
                 .matches("321.await")
                 .matches("321.into()")
+                .matches("crate_root.call(me)")
 
 
         ;

community-rust-frontend/src/test/java/org/sonar/rust/parser/lexer/IdentifierTest.java

@@ -124,6 +124,7 @@ public void testIdentifier() {
                 .matches("r#true")
                 .matches("Москва")
                 .matches("東京")
+                .matches("crate_root")
 
         ;