1 files changed, 27 insertions, 0 deletions
diff --git a/packages/astro-parser/src/parse/utils/bracket.ts b/packages/astro-parser/src/parse/utils/bracket.ts
new file mode 100644
index 000000000..7e885ad78
--- /dev/null
+++ b/packages/astro-parser/src/parse/utils/bracket.ts
@@ -0,0 +1,27 @@
+// @ts-nocheck
+
+const SQUARE_BRACKET_OPEN = '['.charCodeAt(0);
+const SQUARE_BRACKET_CLOSE = ']'.charCodeAt(0);
+const CURLY_BRACKET_OPEN = '{'.charCodeAt(0);
+const CURLY_BRACKET_CLOSE = '}'.charCodeAt(0);
+
+export function is_bracket_open(code) {
+  return code === SQUARE_BRACKET_OPEN || code === CURLY_BRACKET_OPEN;
+}
+
+export function is_bracket_close(code) {
+  return code === SQUARE_BRACKET_CLOSE || code === CURLY_BRACKET_CLOSE;
+}
+
+export function is_bracket_pair(open, close) {
+  return (open === SQUARE_BRACKET_OPEN && close === SQUARE_BRACKET_CLOSE) || (open === CURLY_BRACKET_OPEN && close === CURLY_BRACKET_CLOSE);
+}
+
+export function get_bracket_close(open) {
+  if (open === SQUARE_BRACKET_OPEN) {
+    return SQUARE_BRACKET_CLOSE;
+  }
+  if (open === CURLY_BRACKET_OPEN) {
+    return CURLY_BRACKET_CLOSE;
+  }
+}