Partials can be paths

Allows partials with slashes, a common partial syntax. For example:

    {{> shared/dude}}

src/handlebars.l

@@ -1,5 +1,5 @@
 
-%x mu emu com
+%x mu emu com par
 
 %%
 
@@ -19,7 +19,7 @@
 
 <com>[\s\S]*?"--}}"              { yytext = yytext.substr(0, yyleng-4); this.popState(); return 'COMMENT'; }
 
-<mu>"{{>"                        { return 'OPEN_PARTIAL'; }
+<mu>"{{>"                        { this.begin("par"); return 'OPEN_PARTIAL'; }
 <mu>"{{#"                        { return 'OPEN_BLOCK'; }
 <mu>"{{/"                        { return 'OPEN_ENDBLOCK'; }
 <mu>"{{^"                        { return 'OPEN_INVERSE'; }
@@ -46,6 +46,8 @@
 <mu>[a-zA-Z0-9_$-]+/[=}\s\/.]    { return 'ID'; }
 <mu>'['[^\]]*']'                 { yytext = yytext.substr(1, yyleng-2); return 'ID'; }
 <mu>.                            { return 'INVALID'; }
+<par>\s+                         { /*ignore whitespace*/ }
+<par>[a-zA-Z0-9_$-/]+            { this.popState(); return 'PARTIAL_NAME'; }
 
 <INITIAL,mu><<EOF>>              { return 'EOF'; }
 

src/handlebars.yy

@@ -45,8 +45,8 @@ mustache
 
 
 partial
-  : OPEN_PARTIAL path CLOSE { $$ = new yy.PartialNode($2); }
-  | OPEN_PARTIAL path path CLOSE { $$ = new yy.PartialNode($2, $3); }
+  : OPEN_PARTIAL partialName CLOSE { $$ = new yy.PartialNode($2); }
+  | OPEN_PARTIAL partialName path CLOSE { $$ = new yy.PartialNode($2, $3); }
   ;
 
 simpleInverse
@@ -91,6 +91,10 @@ hashSegment
   | ID EQUALS DATA { $$ = [$1, new yy.DataNode($3)]; }
   ;
 
+partialName
+  : PARTIAL_NAME { $$ = new yy.PartialNameNode($1); }
+  ;
+
 path
   : pathSegments { $$ = new yy.IdNode($1); }
   ;