update

node_modules/@babel/plugin-transform-template-literals/lib/index.js

@@ -10,12 +10,13 @@ var _helperPluginUtils = require("@babel/helper-plugin-utils");
 var _core = require("@babel/core");
 
 var _default = (0, _helperPluginUtils.declare)((api, options) => {
+  var _api$assumption, _api$assumption2;
+
   api.assertVersion(7);
-  const {
-    loose
-  } = options;
+  const ignoreToPrimitiveHint = (_api$assumption = api.assumption("ignoreToPrimitiveHint")) != null ? _api$assumption : options.loose;
+  const mutableTemplateObject = (_api$assumption2 = api.assumption("mutableTemplateObject")) != null ? _api$assumption2 : options.loose;
   let helperName = "taggedTemplateLiteral";
-  if (loose) helperName += "Loose";
+  if (mutableTemplateObject) helperName += "Loose";
 
   function buildConcatCallExpressions(items) {
     let avail = true;
@@ -64,27 +65,28 @@ var _default = (0, _helperPluginUtils.declare)((api, options) => {
           }
         }
 
-        const scope = path.scope.getProgramParent();
-        const templateObject = scope.generateUidIdentifier("templateObject");
-        const helperId = this.addHelper(helperName);
-        const callExpressionInput = [_core.types.arrayExpression(strings)];
+        const helperArgs = [_core.types.arrayExpression(strings)];
 
         if (!isStringsRawEqual) {
-          callExpressionInput.push(_core.types.arrayExpression(raws));
+          helperArgs.push(_core.types.arrayExpression(raws));
         }
 
-        const lazyLoad = _core.template.ast`
-          function ${templateObject}() {
-            const data = ${_core.types.callExpression(helperId, callExpressionInput)};
-            ${templateObject} = function() { return data };
-            return data;
-          } 
-        `;
-        scope.path.unshiftContainer("body", lazyLoad);
-        path.replaceWith(_core.types.callExpression(node.tag, [_core.types.callExpression(_core.types.cloneNode(templateObject), []), ...quasi.expressions]));
+        const tmp = path.scope.generateUidIdentifier("templateObject");
+        path.scope.getProgramParent().push({
+          id: _core.types.cloneNode(tmp)
+        });
+        path.replaceWith(_core.types.callExpression(node.tag, [_core.template.expression.ast`
+              ${_core.types.cloneNode(tmp)} || (
+                ${tmp} = ${this.addHelper(helperName)}(${helperArgs})
+              )
+            `, ...quasi.expressions]));
       },
 
       TemplateLiteral(path) {
+        if (path.parent.type === "TSLiteralType") {
+          return;
+        }
+
         const nodes = [];
         const expressions = path.get("expressions");
         let index = 0;
@@ -106,15 +108,13 @@ var _default = (0, _helperPluginUtils.declare)((api, options) => {
           }
         }
 
-        const considerSecondNode = !loose || !_core.types.isStringLiteral(nodes[1]);
-
-        if (!_core.types.isStringLiteral(nodes[0]) && considerSecondNode) {
+        if (!_core.types.isStringLiteral(nodes[0]) && !(ignoreToPrimitiveHint && _core.types.isStringLiteral(nodes[1]))) {
           nodes.unshift(_core.types.stringLiteral(""));
         }
 
         let root = nodes[0];
 
-        if (loose) {
+        if (ignoreToPrimitiveHint) {
           for (let i = 1; i < nodes.length; i++) {
             root = _core.types.binaryExpression("+", root, nodes[i]);
           }