test: add skip-block test; fix: cannot skip a${"b"}c

Author: HerrCai0907

src/parser.ts

@@ -4273,6 +4273,7 @@ export class Parser extends DiagnosticEmitter {
     // at '{': ... '}'
     var depth = 1;
     var again = true;
+    let readingTemplateString = false;
     do {
       switch (tn.next()) {
         case Token.ENDOFFILE: {
@@ -4290,6 +4291,13 @@ export class Parser extends DiagnosticEmitter {
         case Token.CLOSEBRACE: {
           --depth;
           if (!depth) again = false;
+          if (readingTemplateString) {
+            tn.readString(CharCode.BACKTICK);
+            readingTemplateString = tn.readingTemplateString;
+            if (readingTemplateString) {
+              ++depth;
+            }
+          }
           break;
         }
         case Token.IDENTIFIER: {
@@ -4301,13 +4309,10 @@ export class Parser extends DiagnosticEmitter {
           break;
         }
         case Token.TEMPLATELITERAL: {
-          if (tn.readingTemplateString) {
-            tn.readString(CharCode.BACKTICK);
-          } else {
-            tn.readString();
-          }
+          tn.readString();
+          readingTemplateString = tn.readingTemplateString;
           // in readString, tn.pos consume '${'
-          if (tn.readingTemplateString) {
+          if (readingTemplateString) {
             ++depth;
           }
           break;

tests/parser/skip-error-block.ts

@@ -0,0 +1,13 @@
+{
+  for () {
+    `Some string`
+  }
+
+  while () {
+    `Some${11} string`
+  }
+
+  if () {
+    `Some${"11"} string`
+  }
+}

tests/parser/skip-error-block.ts.fixture.ts

@@ -0,0 +1,4 @@
+{}
+// ERROR 1109: "Expression expected." in skip-error-block.ts(2,8+1)
+// ERROR 1109: "Expression expected." in skip-error-block.ts(6,10+1)
+// ERROR 1109: "Expression expected." in skip-error-block.ts(10,7+1)