fix string escapes

src/ludus.janet

@@ -49,10 +49,10 @@
  (set (out :draw) (post :draw))
  (-> out j/encode string))
 
-(comment
-# (do
+# (comment
+(do
 (def source `
-words ("foo    bar")
+"foo \bbar"
 `)
 (def out (-> source 
  ludus 

src/scanner.janet

@@ -194,6 +194,15 @@
         :else (add-error scanner (string "Unexpected " curr " after number " num ".")))))
   (recur scanner (buffer char) false))
 
+(def escape {
+  "\"" "\""
+  "n" "\n"
+  "{" "{"
+  "t" "\t"
+  "r" "\r"
+  "\\" "\\"
+})
+
 (defn- add-string
   [scanner]
   (defn recur [scanner buff interpolate?]
@@ -204,12 +213,10 @@
         "\n" (recur (update (advance scanner) :line inc) (buffer/push buff char) interpolate?)
         "\"" (add-token (advance scanner) (if interpolate? :interpolated :string) (string buff))
         "\\" (let [next (next-char scanner)]
-                (if (= next "{") 
-                  (do
-                    (buffer/push buff char)
-                    (buffer/push buff next)
-                    (recur (advance (advance scanner)) buff interpolate?))
-                  (recur (advance scanner) (buffer/push buff char) interpolate?))) 
+                (recur 
+                  (advance (advance scanner)) 
+                  (buffer/push buff (get escape next next))
+                  interpolate?))
         (if (at-end? scanner)
           (add-error scanner "Unterminated string.")
           (recur (advance scanner) (buffer/push buff char) interpolate?)))))
@@ -341,8 +348,8 @@
       (recur (-> scanner (scan-token) (next-token)))))
   (recur (new-scanner source input)))
 
-# (comment
-(do
+(comment
+# (do
   (def source "/iii")
   (scan source)
 )