Allow view expression in CREATE VIEW statement.

A view expression can now be used in a `CREATE VIEW`
statement.

``` sql
CREATE VIEW v1(a, b) AS VALUES(1, 2), (3, 4);
```

Author: nwronski

CHANGELOG.md

@@ -414,6 +414,12 @@ All notable changes to this project will be documented in this file.
   SELECT * FROM s;
   ```
 
+- A view expression can now be used in a `CREATE VIEW` statement.
+
+  ``` sql
+  CREATE VIEW v1(a, b) AS VALUES(1, 2), (3, 4);
+  ```
+
 ## [v0.14.5] - 2016-07-11
 ### Fixed
 - Fix alternate not equal operator `<>`

src/grammar.pegjs

@@ -2408,7 +2408,7 @@ action_loop_stmt
   { return s; }
 
 create_view "CREATE VIEW Statement"
-  = s:( create_view_start ) ne:( create_core_ine )? n:( id_view ) o
+  = s:( create_view_start ) ne:( create_core_ine )? n:( id_view_expression ) o
     r:( create_as_select )
   {
     return Object.assign({
@@ -2418,6 +2418,18 @@ create_view "CREATE VIEW Statement"
     }, s, ne);
   }
 
+id_view_expression
+  = n:( id_view ) o a:( loop_columns ) {
+    return Object.assign({
+      'type': 'identifier',
+      'variant': 'expression',
+      'format': 'view',
+      'name': n['name'],
+      'columns': []
+    }, a);
+  }
+  / id_view
+
 create_view_start
   = s:( create_start ) tmp:( create_core_tmp )? v:( VIEW ) o
   {