fix(ecma/parser): parse types in CallExpression inside templates

crates/swc_ecma_parser/src/lib.rs

@@ -369,9 +369,6 @@ pub struct Context {
 
     in_forced_jsx_context: bool,
 
-    /// If true, `:` should not be treated as a type annotation.
-    dont_parse_colon_as_type_ann: bool,
-
     // If true, allow super.x and super[x]
     allow_direct_super: bool,
 

crates/swc_ecma_parser/src/parser/expr.rs

@@ -218,7 +218,6 @@ impl<I: Tokens> Parser<I> {
             let ctx = Context {
                 in_cond_expr: true,
                 will_expect_colon_for_cond: false,
-                dont_parse_colon_as_type_ann: false,
                 ..self.ctx()
             };
             let alt = self.with_ctx(ctx).parse_assignment_expr()?;
@@ -306,7 +305,6 @@ impl<I: Tokens> Parser<I> {
                 tok!('[') => {
                     let ctx = Context {
                         will_expect_colon_for_cond: false,
-                        dont_parse_colon_as_type_ann: false,
                         ..self.ctx()
                     };
                     return self.with_ctx(ctx).parse_array_lit();
@@ -378,8 +376,13 @@ impl<I: Tokens> Parser<I> {
                 }
 
                 tok!('`') => {
+                    let ctx = Context {
+                        will_expect_colon_for_cond: false,
+                        ..self.ctx()
+                    };
+
                     // parse template literal
-                    return Ok(Box::new(Expr::Tpl(self.parse_tpl(false)?)));
+                    return Ok(Box::new(Expr::Tpl(self.with_ctx(ctx).parse_tpl(false)?)));
                 }
 
                 tok!('(') => {
@@ -841,7 +844,6 @@ impl<I: Tokens> Parser<I> {
         let return_type = if !self.ctx().will_expect_colon_for_cond
             && self.input.syntax().typescript()
             && is!(self, ':')
-            && !self.ctx().dont_parse_colon_as_type_ann
         {
             self.try_parse_ts(|p| {
                 let return_type = p.parse_ts_type_or_type_predicate_ann(&tok!(':'))?;
@@ -1470,7 +1472,12 @@ impl<I: Tokens> Parser<I> {
 
                 // MemberExpression[?Yield, ?Await] TemplateLiteral[?Yield, ?Await, +Tagged]
                 if is!(self, '`') {
-                    let tpl = self.parse_tagged_tpl(expr, None)?;
+                    let ctx = Context {
+                        will_expect_colon_for_cond: false,
+                        ..self.ctx()
+                    };
+
+                    let tpl = self.with_ctx(ctx).parse_tagged_tpl(expr, None)?;
                     return Ok((Box::new(Expr::TaggedTpl(tpl)), true));
                 }
 

crates/swc_ecma_parser/src/parser/object.rs

@@ -14,7 +14,6 @@ impl<I: Tokens> Parser<I> {
     {
         let ctx = Context {
             will_expect_colon_for_cond: false,
-            dont_parse_colon_as_type_ann: false,
             ..self.ctx()
         };
         self.with_ctx(ctx).parse_with(|p| {

crates/swc_ecma_parser/src/parser/stmt.rs

@@ -610,15 +610,8 @@ impl<'a, I: Tokens> Parser<I> {
                 let is_case = is!(p, "case");
                 let case_start = cur_pos!(p);
                 bump!(p);
-                let ctx = Context {
-                    dont_parse_colon_as_type_ann: true,
-                    ..p.ctx()
-                };
                 let test = if is_case {
-                    p.with_ctx(ctx)
-                        .include_in_expr(true)
-                        .parse_expr()
-                        .map(Some)?
+                    p.include_in_expr(true).parse_expr().map(Some)?
                 } else {
                     if let Some(previous) = span_of_previous_default {
                         syntax_error!(p, SyntaxError::MultipleDefault { previous });

crates/swc_ecma_parser/tests/typescript/issue-6601/index.tsx

@@ -0,0 +1,104 @@
+function exampleFunction1() {
+    return Math.random() > 0.5
+        ? `<button
+        @click="${(): void => console.log('this line causes a syntax error')}"
+      ></button>`
+        : `<button
+        @click="${(): void => console.log('this line does NOT causes a syntax error')}"
+      ></button>`;
+}
+
+function exampleFunction2() {
+    return Math.random() > 0.5
+        ? `<bar></bar>` + `<button
+        @click="${(): void => console.log('this line causes a syntax error')}"
+      ></button>`
+        : `<bar></bar>` + `<button
+        @click="${(): void => console.log('this line does NOT causes a syntax error')}"
+      ></button>`;
+}
+
+function exampleFunction3() {
+    return Math.random() > 0.5
+        ? (): void => console.log('this line causes a syntax error')
+        : (): void => console.log('this line does NOT causes a syntax error');
+}
+
+function exampleFunction4() {
+    return Math.random() > 0.5
+        ? function (): void { console.log('this line causes a syntax error') }
+        : function (): void { console.log('this line does NOT causes a syntax error') };
+}
+
+function exampleFunction5() {
+    return Math.random() > 0.5
+        ? (function (): void { console.log('this line causes a syntax error') })
+        : (function (): void { console.log('this line does NOT causes a syntax error') });
+}
+
+function exampleFunction6() {
+    return Math.random() > 0.5
+        ? "test" == "test"
+            ? `<button @click="${(): void => console.log('this line causes a syntax error')}"></button>`
+            : "bar"
+        : `<button
+        @click="${(): void => console.log('this line does NOT causes a syntax error')}"
+      ></button>`;
+}
+
+
+function exampleFunction6() {
+    return Math.random() > 0.5
+        ? `<button @click="${(): void => console.log('this line causes a syntax error')}"></button>`
+        : "test" == "test"
+            ? `<button @click="${(): void => console.log('this line causes a syntax error')}"></button>`
+            : "bar";
+}
+
+function exampleFunction7() {
+    return Math.random() > 0.5
+        ? foo`<button @click="${(): void => console.log('this line causes a syntax error')}"></button>`
+        : bar`<button @click="${(): void => console.log('this line does NOT causes a syntax error')}"></button>`;
+}
+
+function exampleFunction8() {
+    return Math.random() > 0.5
+        ? ((): void => console.log('this line causes a syntax error'))
+        : ((): void => console.log('this line does NOT causes a syntax error'));
+}
+
+function exampleFunction9() {
+    return Math.random() > 0.5
+        ? async (): Promise<void> => console.log('this line causes a syntax error')
+        : async (): Promise<void> => console.log('this line causes a syntax error');
+}
+
+function exampleFunction10() {
+    const foo = "Oranges";
+
+    switch (foo) {
+        case 'Oranges': {
+            return `<button @click="${(): void => console.log('this line causes a syntax error')}" ></button>`;
+        }
+        default:
+            console.log(`Sorry, we are out of test.`);
+    }
+}
+
+function exampleFunction11() {
+    switch (true) {
+        case ((): boolean => true)(): {
+            console.log('This shape is a square.');
+            break;
+        }
+    }
+}
+
+function exampleFunction12() {
+    switch (((): boolean => true)()) {
+        case ((): boolean => true)(): {
+            console.log('This shape is a square.');
+            break;
+        }
+    }
+}