Add support for ES6 template strings

This requires a bit of bookeeping in the lexer, as we can have
arbitrary expressions inside the ${...}. To make this work, keep
a stack of template states, in which we count the unclosed braces
to match up with the correct closing brace.

Implements support for `...`. Expressions of the type Foo`...`
and Foo()`...` will come in follow-up commits.

Change-Id: Ia332796cfb77895583d0093732e6f56c8b0662c9
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 8 insertions, 0 deletions

diff --git a/src/qml/parser/qqmljsast.cpp b/src/qml/parser/qqmljsast.cpp
index 34657a7d48..6fdfd8279c 100644
--- a/src/qml/parser/qqmljsast.cpp
+++ b/src/qml/parser/qqmljsast.cpp
@@ -155,6 +155,14 @@ void StringLiteral::accept0(Visitor *visitor)
     visitor->endVisit(this);
 }
 
+void TemplateLiteral::accept0(Visitor *visitor)
+{
+    if (visitor->visit(this)) {
+    }
+
+    visitor->endVisit(this);
+}
+
 void NumericLiteral::accept0(Visitor *visitor)
 {
     if (visitor->visit(this)) {