namespace GL {
namespace SL {
+/** Base class for validators. Contains some utilities for adding diagnostic
+messages. */
class Validator: protected TraversingVisitor
{
protected:
- Stage *stage;
- Node *last_provoker;
+ Stage *stage = 0;
+ Node *last_provoker = 0;
- Validator();
+ Validator() = default;
void diagnose(Node &, Node &, Diagnostic::Severity, const std::string &);
void diagnose(Node &n, Diagnostic::Severity s, const std::string &m) { diagnose(n, n, s, m); }
void add_info(Node &, const std::string &);
};
+/** Verifies that declarations are valid in isolation. */
class DeclarationValidator: private Validator
{
private:
FUNCTION
};
- ScopeType scope;
- InterfaceLayout *iface_layout;
- InterfaceBlock *iface_block;
- VariableDeclaration *variable;
+ ScopeType scope = GLOBAL;
+ InterfaceLayout *iface_layout = 0;
+ InterfaceBlock *iface_block = 0;
+ VariableDeclaration *variable = 0;
public:
- DeclarationValidator();
-
void apply(Stage &s) { stage = &s; s.content.visit(*this); }
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:
std::map<Block *, BlockDeclarationMap> declarations;
std::map<std::string, InterfaceBlock *> interface_blocks;
std::map<std::string, FunctionDeclaration *> overloaded_functions;
- bool anonymous_block;
+ bool anonymous_block = false;
public:
- IdentifierValidator();
-
void apply(Stage &s) { stage = &s; s.content.visit(*this); }
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;
+ enum ConstantKind
+ {
+ NOT_CONSTANT,
+ FIXED_CONSTANT,
+ SPEC_CONSTANT
+ };
-public:
- ExpressionValidator();
+ FunctionDeclaration *current_function = 0;
+ bool in_struct = false;
+ ConstantKind constant_expression = NOT_CONSTANT;
+public:
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(Assignment &);
virtual void visit(TernaryExpression &);
+ virtual void visit(StructDeclaration &);
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 = true;
+
+public:
+ 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:
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;
+ Node *node = 0;
+ TypeDeclaration *type = 0;
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) { }
+ int location = -1;
+ unsigned loc_count = 1;
+ int desc_set = 0;
+ int bind_point = -1;
};
std::list<Uniform> uniforms;