Added String.fromCharCode, "a".code

Added a preprocessor

hscript/Error.hx

@@ -0,0 +1,67 @@
+/*
+ * Copyright (C)2008-2017 Haxe Foundation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+package hscript;
+
+#if hscriptPos
+class Error {
+	public var e : ErrorDef;
+	public var pmin : Int;
+	public var pmax : Int;
+	public var origin : String;
+	public var line : Int;
+	public function new(e, pmin, pmax, origin, line) {
+		this.e = e;
+		this.pmin = pmin;
+		this.pmax = pmax;
+		this.origin = origin;
+		this.line = line;
+	}
+	public function toString(): String {
+		return Printer.errorToString(this);
+	}
+}
+enum ErrorDef
+#else
+enum Error
+#end
+{
+	EInvalidChar( c : Int );
+	EUnexpected( s : String );
+	EUnterminatedString;
+	EUnterminatedComment;
+	EInvalidPreprocessor( msg : String );
+	EUnknownVariable( v : String );
+	EInvalidIterator( v : String );
+	EInvalidOp( op : String );
+	EInvalidAccess( f : String );
+	ECustom( msg : String );
+	EPreset( msg : ErrorMessage );
+	EInvalidClass( className : String);
+	EAlreadyExistingClass( className : String);
+	EInvalidEscape( s : String );
+}
+
+enum abstract ErrorMessage(String) to String {
+    final INVALID_CHAR_CODE_MULTI = "'char'.code only works on single characters";
+    final FROM_CHAR_CODE_NON_INT = "String.fromCharCode only works on integers";
+    final EMPTY_INTERPOLATION = "Invalid interpolation: Expression cannot be empty";
+}