Add support for partials and path segments for Handlebars.

This introduces support for some missing features to the Handlebars lexer:
Partials and path segments. Partials mostly appeared to work before, but the
`>` in `{{> ... }}` would appear as a syntax error, as could other
components of the partial. This change introduces support for:

* Standard partials: `{{> partialName}}`
* Partials with parameters: `{{> partialName varname="value"}}`
* Ddynamic partials: `{{> (partialFunc)}}`
* Ddynamic partials with lookups: `{{> (lookup ../path "partialName")}}`
* Partial blocks: `{{> @partial-block}}`
* Inline partials: `{{#*inline}}..{{/inline}}`

It also introduces support for path segments, which can reference content in
the current context or in a parent context. For instance, `this.name`,
`this/name`, `./name`, `../name`, `this/name`, etc. These are all now tracked
as variables.

1 files changed, 20 insertions, 0 deletions

diff --git a/tests/examplefiles/example2.cpp b/tests/examplefiles/example2.cpp
new file mode 100644
index 00000000..ccd99383
--- /dev/null
+++ b/tests/examplefiles/example2.cpp
@@ -0,0 +1,20 @@
+/*
+ * A Test file for the different string literals.
+ */
+
+#include <iostream>
+
+int main() {
+    char *_str      = "a normal string";
+    wchar_t *L_str  = L"a wide string";
+    char *u8_str    = u8"utf-8 string";
+    char16_t *u_str = u"utf-16 string";
+    char32_t *U_str = U"utf-32 string";
+    char *R_str     = R""""(raw string with
+"""
+as a delimiter)"""";
+
+    std::cout << R_str << std::endl;
+
+    return 0;
+}