allow identifier names with leading dollar (#321)

Author: AlexHaxe

src/checkstyle/token/TokenStream.hx

@@ -35,6 +35,7 @@ class TokenStream {
 
 	public function consumeConstIdent():TokenTree {
 		switch (token()) {
+			case Dollar(_): return consumeToken();
 			case Const(CIdent(_)): return consumeToken();
 			default: error('bad token ${token()} != Const(CIdent(_))');
 		}

test/token/TokenTreeBuilderParsingTest.hx

@@ -21,6 +21,7 @@ class TokenTreeBuilderParsingTest extends haxe.unit.TestCase {
 		assertCodeParses(ISSUE_252);
 		assertCodeParses(ISSUE_253);
 		assertCodeParses(ISSUE_256);
+		assertCodeParses(DOLLAR_TOKEN_AS_VAR_NAME);
 	}
 
 	public function assertCodeParses(code:String, ?pos:PosInfos) {
@@ -158,4 +159,11 @@ abstract TokenTreeBuilderParsingTests(String) to String {
 		}
 	}";
 
+	var DOLLAR_TOKEN_AS_VAR_NAME = "
+	class Test {
+		function foo() {
+			macro var $componentVarName = new $typePath();
+		}
+	}";
+
 }