luafmt (https://github.com/trixnz/lua-fmt/) patch for binary operators

printer.ts.patch

--- a/src/printer.ts
+++ b/src/printer.ts
@@ -101,6 +101,17 @@ function isLastStatement(path: FastPath) {
     return body && body[body.length - 1] === node;
 }

+const binOps = {
+    ["~"]: "__bxor",
+    ["|"]: "__bor",
+    ["<<"]: "__shl",
+    [">>"]: "__shr",
+}
+
+const unOps = {
+    ["~"]: "__bnot",
+}
+
 function printNodeNoParens(path: FastPath, options: Options, print: PrintFn) {
     const value = path.getValue();

@@ -111,6 +122,19 @@ function printNodeNoParens(path: FastPath, options: Options, print: PrintFn) {
     const parts: Doc[] = [];

     const node = value as luaparse.Node;
+    if(node.type == "BinaryExpression" && binOps[node.operator]) {
+        Object.assign(node, {
+            type: "CallExpression", loc: node.loc, range: node.range, inParens: false,
+            base: { type: "Identifier", loc: node.loc, range: node.range, inParens: false, name: binOps[node.operator] },
+            arguments: [node.left, node.right],
+        });
+    } else if (node.type == "UnaryExpression" && unOps[node.operator]) {
+        Object.assign(node, {
+            type: "CallExpression", loc: node.loc, range: node.range, inParens: false,
+            base: { type: "Identifier", loc: node.loc, range: node.range, inParens: false, name: binOps[node.operator] },
+            arguments: [node.argument],
+        });
+    }

     switch (node.type) {
         case 'Chunk':