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, 3 insertions, 0 deletions

diff --git a/src/qml/parser/qqmljsastvisitor_p.h b/src/qml/parser/qqmljsastvisitor_p.h
index 13218f0e98..5a0767a697 100644
--- a/src/qml/parser/qqmljsastvisitor_p.h
+++ b/src/qml/parser/qqmljsastvisitor_p.h
@@ -125,6 +125,9 @@ public:
     virtual bool visit(StringLiteral *) { return true; }
     virtual void endVisit(StringLiteral *) {}
 
+    virtual bool visit(TemplateLiteral *) { return true; }
+    virtual void endVisit(TemplateLiteral *) {}
+
     virtual bool visit(NumericLiteral *) { return true; }
     virtual void endVisit(NumericLiteral *) {}