glsl: Move precision handling to be part of qualifier handling.

This is necessary for the parser to be able to accept precision
qualifiers not immediately adjacent to the type, such as "const highp
inout float foo".

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>

src/glsl/ast.h

@@ -437,6 +437,9 @@ struct ast_type_qualifier {
       unsigned i;
    } flags;
 
+   /** Precision of the type (highp/medium/lowp). */
+   unsigned precision:2;
+
    /**
     * Location specified via GL_ARB_explicit_attrib_location layout
     *
@@ -533,7 +536,7 @@ public:
    ast_type_specifier(const ast_type_specifier *that, bool is_array,
                       ast_expression *array_size)
       : ast_node(), type_name(that->type_name), structure(that->structure),
-        is_array(is_array), array_size(array_size), precision(that->precision),
+        is_array(is_array), array_size(array_size),
         default_precision(that->default_precision)
    {
       /* empty */
@@ -542,7 +545,7 @@ public:
    /** Construct a type specifier from a type name */
    ast_type_specifier(const char *name) 
       : type_name(name), structure(NULL),
-	is_array(false), array_size(NULL), precision(ast_precision_none),
+	is_array(false), array_size(NULL),
 	default_precision(ast_precision_none)
    {
       /* empty */
@@ -551,7 +554,7 @@ public:
    /** Construct a type specifier from a structure definition */
    ast_type_specifier(ast_struct_specifier *s)
       : type_name(s->name), structure(s),
-	is_array(false), array_size(NULL), precision(ast_precision_none),
+	is_array(false), array_size(NULL),
 	default_precision(ast_precision_none)
    {
       /* empty */
@@ -571,8 +574,6 @@ public:
    bool is_array;
    ast_expression *array_size;
 
-   unsigned precision:2;
-
    /** For precision statements, this is the given precision; otherwise none. */
    unsigned default_precision:2;
 };