namespace GL {
namespace SL {
+/** Base class for validators. Contains some utilities for adding diagnostic
+messages. */
class Validator: protected TraversingVisitor
{
protected:
void add_info(Node &, const std::string &);
};
+/** Verifies that declarations are valid in isolation. */
class DeclarationValidator: private Validator
{
private:
virtual void visit(FunctionDeclaration &);
};
+/** Verifies that identifiers are unique or, in the case of functions, are
+overloaded only in valid ways. */
class IdentifierValidator: private Validator
{
private:
virtual void visit(FunctionDeclaration &);
};
+/** Verifies that there are no unresolved references. */
class ReferenceValidator: private Validator
{
public:
virtual void visit(FunctionDeclaration &);
};
+/** Verifies that expressions are valid. In most cases an invalid expression
+is indicated by a null result type. */
class ExpressionValidator: private Validator
{
private:
FunctionDeclaration *current_function;
+ bool constant_expression;
public:
ExpressionValidator();
void apply(Stage &s) { stage = &s; s.content.visit(*this); }
private:
+ virtual void visit(VariableReference &);
+ virtual void visit(InterfaceBlockReference &);
virtual void visit(Swizzle &);
virtual void visit(UnaryExpression &);
virtual void visit(BinaryExpression &);
virtual void visit(TernaryExpression &);
virtual void visit(VariableDeclaration &);
virtual void visit(FunctionDeclaration &);
+ virtual void visit(Conditional &);
+ virtual void visit(Iteration &);
virtual void visit(Return &);
};
+/** Verifies flow control constructs. Functions returning non-void must have
+return statements. Warnings are given about dead code. */
+class FlowControlValidator: private Validator
+{
+private:
+ bool reachable;
+
+public:
+ FlowControlValidator();
+
+ void apply(Stage &s) { stage = &s; s.content.visit(*this); }
+
+private:
+ virtual void visit(Block &);
+ virtual void visit(FunctionDeclaration &);
+ virtual void visit(Conditional &);
+ virtual void visit(Iteration &);
+ virtual void visit(Return &) { reachable = false; }
+ virtual void visit(Jump &) { reachable = false; }
+};
+
+/** Verifies that stage input and output interfaces are valid. Linked
+variables must have matching types and locations and there must not be any
+overlap in locations. */
+class StageInterfaceValidator: private Validator
+{
+private:
+ std::map<std::string, std::map<unsigned, VariableDeclaration *> > used_locations;
+
+public:
+ void apply(Stage &s) { stage = &s; s.content.visit(*this); }
+
+private:
+ int get_location(const Layout &);
+
+ virtual void visit(VariableDeclaration &);
+ virtual void visit(FunctionDeclaration &) { }
+};
+
+/** Verifies that uniform interfaces are valid across the entire module.
+Variables declared with the same binding must have the same name and type. */
+class GlobalInterfaceValidator: private Validator
+{
+private:
+ struct Uniform
+ {
+ Node *node;
+ TypeDeclaration *type;
+ std::string name;
+ int location;
+ unsigned loc_count;
+ int desc_set;
+ int bind_point;
+
+ Uniform(): node(0), type(0), location(-1), loc_count(1), desc_set(0), bind_point(-1) { }
+ };
+
+ std::list<Uniform> uniforms;
+ std::map<std::string, const Uniform *> used_names;
+ std::map<unsigned, const Uniform *> used_locations;
+ std::map<unsigned, std::map<unsigned, const Uniform *> > used_bindings;
+
+public:
+ void apply(Module &);
+
+private:
+ void check_uniform(const Uniform &);
+
+ virtual void visit(VariableDeclaration &);
+ virtual void visit(InterfaceBlock &);
+ virtual void visit(FunctionDeclaration &) { }
+};
+
} // namespace SL
} // namespace GL
} // namespace Msp