properly parse maps with maps as values

src/utils/chars.rs

@@ -2,7 +2,7 @@ use peekmore::PeekMoreIterator;
 
 use crate::{error::SassResult, Token};
 
-use super::read_until_closing_quote;
+use super::{read_until_closing_paren, read_until_closing_quote};
 /// Reads until the char is found, consuming the char,
 /// or until the end of the iterator is hit
 pub(crate) fn read_until_char<I: Iterator<Item = Token>>(
@@ -17,6 +17,11 @@ pub(crate) fn read_until_char<I: Iterator<Item = Token>>(
                 v.extend(read_until_closing_quote(toks, tok.kind)?);
                 continue;
             }
+            '(' => {
+                v.push(tok);
+                v.extend(read_until_closing_paren(toks)?);
+                continue;
+            }
             t if t == c => break,
             _ => {}
         }

tests/map.rs

@@ -163,3 +163,17 @@ test!(
     "a {\n  color: inspect(((1, 2): 3));\n}\n",
     "a {\n  color: ((1, 2): 3);\n}\n"
 );
+test!(
+    // todo: this just tests that it compiles, but does not test
+    // if it parses correctly
+    map_with_map_as_value,
+    "$foo: (\"21by9\": (x: 21, y: 9));",
+    ""
+);
+test!(
+    // todo: this just tests that it compiles, but does not test
+    // if it parses correctly
+    paren_with_paren_element_and_trailing_comma,
+    "$foo: ((\"<\", \"%3c\"), );",
+    ""
+);