Require conditions to be booleans

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

diff --git a/source/glsl/validate.h b/source/glsl/validate.h
index acb5b4e4086810972263a03ad5f2cb065fc205d1..1a05817069282873e27328f03683921b5945499e 100644 (file)
--- a/source/glsl/validate.h
+++ b/source/glsl/validate.h
@@ -10,6 +10,8 @@ namespace Msp {
 namespace GL {
 namespace SL {
 
+/** Base class for validators.  Contains some utilities for adding diagnostic
+messages. */
 class Validator: protected TraversingVisitor
 {
 protected:
@@ -24,6 +26,7 @@ protected:
        void add_info(Node &, const std::string &);
 };
 
+/** Verifies that declarations are valid in isolation. */
 class DeclarationValidator: private Validator
 {
 private:
@@ -59,6 +62,8 @@ 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:
@@ -89,6 +94,7 @@ private:
        virtual void visit(FunctionDeclaration &);
 };
 
+/** Verifies that there are no unresolved references. */
 class ReferenceValidator: private Validator
 {
 public:
@@ -106,6 +112,8 @@ private:
        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:
@@ -124,9 +132,14 @@ private:
        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 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:
@@ -142,6 +155,8 @@ 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: