Record assignment targets more precisely

[libs/gl.git] / source / glsl / syntax.h

diff --git a/source/glsl/syntax.h b/source/glsl/syntax.h
index 30acca42b957bd42b547b642173032160fcdd0df..3976af56aa77c97b2a8f430daa89514004209628 100644 (file)
--- a/source/glsl/syntax.h
+++ b/source/glsl/syntax.h
@@ -6,6 +6,7 @@
 #include <set>
 #include <string>
 #include <vector>
+#include <msp/core/inttypes.h>
 #include <msp/core/refptr.h>
 #include <msp/core/variant.h>
 #include "features.h"
@@ -197,6 +198,19 @@ struct MemberAccess: Expression
        virtual void visit(NodeVisitor &);
 };
 
+struct Swizzle: Expression
+{
+       NodePtr<Expression> left;
+       std::string component_group;
+       unsigned count;
+       UInt8 components[4];
+
+       Swizzle();
+
+       virtual Swizzle *clone() const { return new Swizzle(*this); }
+       virtual void visit(NodeVisitor &);
+};
+
 struct UnaryExpression: Expression
 {
        NodePtr<Expression> expression;
@@ -216,9 +230,27 @@ struct BinaryExpression: Expression
 
 struct Assignment: BinaryExpression
 {
+       struct Target
+       {
+               enum ChainType
+               {
+                       MEMBER = 0x40,
+                       SWIZZLE = 0x80,
+                       ARRAY = 0xC0
+               };
+
+               Statement *declaration;
+               Msp::UInt8 chain_len;
+               Msp::UInt8 chain[7];
+
+               Target(Statement * = 0);
+
+               bool operator<(const Target &) const;
+       };
+
        bool self_referencing;
 
-       VariableDeclaration *target_declaration;
+       Target target;
 
        Assignment();
        Assignment(const Assignment &);