allow escaping things inside strings

core/compiler.go

@@ -195,6 +195,34 @@ func (c *Compiler) compile(tree Node) error {
 
 	switch tree.Type() {
 	case StringNodeType:
+		n := tree.(*StringNode)
+		s := ""
+		escaped := false
+
+		for _, ch := range n.value {
+			if escaped {
+				switch ch {
+				case 'n':
+					s += "\n"
+				case 't':
+					s += "\t"
+				case 'r':
+					s += "\r"
+				default:
+					s += string(ch)
+				}
+				escaped = false
+				continue
+			}
+
+			switch ch {
+			case '\\':
+				escaped = true
+			default:
+				s += string(ch)
+			}
+		}
+
 		c.add(InstructionConstant)
 		c.addConstant(&StringValue{
 			tree.(*StringNode).value,