glsl: Parse the "binding" keyword and store it in ast_type_qualifier.

Nothing actually uses this yet.

v2: Remove >= 0 checks.  They'll be handled in later validation.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Paul Berry <stereotype441@gmail.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/src/glsl/ast.h b/src/glsl/ast.h
index 6aede00..d98f1a3 100644
--- a/src/glsl/ast.h
+++ b/src/glsl/ast.h
@@ -413,6 +413,12 @@ struct ast_type_qualifier {
 	  */
 	 unsigned explicit_index:1;
 
+         /**
+          * Flag set if GL_ARB_shading_language_420pack "binding" layout
+          * qualifier is used.
+          */
+         unsigned explicit_binding:1;
+
          /** \name Layout qualifiers for GL_AMD_conservative_depth */
          /** \{ */
          unsigned depth_any:1;
@@ -456,6 +462,14 @@ struct ast_type_qualifier {
    int index;
 
    /**
+    * Binding specified via GL_ARB_shading_language_420pack's "binding" keyword.
+    *
+    * \note
+    * This field is only valid if \c explicit_binding is set.
+    */
+   int binding;
+
+   /**
     * Return true if and only if an interpolation qualifier is present.
     */
    bool has_interpolation() const;