Initial stub version of resolve for types

idea/src/org/jetbrains/jet/lang/modules/JetModule.java

@@ -0,0 +1,10 @@
+package org.jetbrains.jet.lang.modules;
+
+import java.util.Collection;
+
+/**
+ * @author abreslav
+ */
+public interface JetModule extends NamespaceDomain {
+    Collection<JetModule> getImports();
+}

idea/src/org/jetbrains/jet/lang/modules/MemberDomain.java

@@ -0,0 +1,24 @@
+package org.jetbrains.jet.lang.modules;
+
+import org.jetbrains.annotations.Nullable;
+import org.jetbrains.jet.lang.types.ClassDescriptor;
+import org.jetbrains.jet.lang.types.ExtensionDescriptor;
+import org.jetbrains.jet.lang.types.MethodDescriptor;
+import org.jetbrains.jet.lang.types.PropertyDescriptor;
+
+/**
+ * @author abreslav
+ */
+public interface MemberDomain {
+    @Nullable
+    MethodDescriptor getMethods(String name);
+
+    @Nullable
+    ClassDescriptor getClass(String name);
+
+    @Nullable
+    PropertyDescriptor getProperty(String name);
+
+    @Nullable
+    ExtensionDescriptor getExtension(String name);
+}

idea/src/org/jetbrains/jet/lang/modules/NamespaceDomain.java

@@ -0,0 +1,12 @@
+package org.jetbrains.jet.lang.modules;
+
+import org.jetbrains.annotations.Nullable;
+import org.jetbrains.jet.lang.types.NamespaceDescriptor;
+
+/**
+ * @author abreslav
+ */
+public interface NamespaceDomain {
+    @Nullable
+    NamespaceDescriptor getNamespace(String namespaceName);
+}

idea/src/org/jetbrains/jet/lang/psi/JetReferenceExpression.java

@@ -2,6 +2,8 @@ package org.jetbrains.jet.lang.psi;
 
 import com.intellij.lang.ASTNode;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.jetbrains.jet.lexer.JetTokens;
 
 /**
  * @author max
@@ -11,6 +13,19 @@ public class JetReferenceExpression extends JetExpression {
         super(node);
     }
 
+    public boolean isAbsoluteInRootNamespace() {
+        return findChildByType(JetTokens.NAMESPACE_KEYWORD) != null;
+    }
+
+    @Nullable
+    public JetReferenceExpression getQualifier() {
+        return findChildByClass(JetReferenceExpression.class);
+    }
+
+    public String getReferencedName() {
+        return getNode().findChildByType(JetTokens.IDENTIFIER).getText();
+    }
+
     @Override
     public void accept(JetVisitor visitor) {
         visitor.visitReferenceExpression(this);

idea/src/org/jetbrains/jet/lang/psi/JetUserType.java

@@ -2,12 +2,7 @@ package org.jetbrains.jet.lang.psi;
 
 import com.intellij.lang.ASTNode;
 import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jet.JetNodeTypes;
-import org.jetbrains.jet.lexer.JetTokens;
-
-import java.util.Collections;
-import java.util.List;
 
 /**
  * @author max
@@ -22,34 +17,7 @@ public class JetUserType extends JetTypeElement {
         visitor.visitUserType(this);
     }
 
-    public boolean isAbsoluteInRootNamespace() {
-        return findChildByType(JetTokens.NAMESPACE_KEYWORD) != null;
-    }
-
-    @Nullable
-    public JetUserType getQualifierType() {
-        return (JetUserType) findChildByType(JetNodeTypes.USER_TYPE);
-    }
-
-    @Nullable @IfNotParsed
-    public ASTNode getTypeNameNode() {
-        return getNode().findChildByType(JetNodeTypes.REFERENCE_EXPRESSION);
-    }
-
-    @Nullable @IfNotParsed
-    public String getReferencedName() {
-        ASTNode nameNode = getTypeNameNode();
-        return nameNode != null ? nameNode.getText() : null;
-    }
-
-    @Nullable
-    public JetTypeArgumentList getTypeArgumentList() {
-        return (JetTypeArgumentList) findChildByType(JetNodeTypes.TYPE_ARGUMENT_LIST);
-    }
-
-    @NotNull
-    public List<JetTypeReference> getTypeArguments() {
-        JetTypeArgumentList list = getTypeArgumentList();
-        return list != null ? list.getArguments() : Collections.<JetTypeReference>emptyList();
+    public JetReferenceExpression getReferenceExpression() {
+        return (JetReferenceExpression) findChildByType(JetNodeTypes.REFERENCE_EXPRESSION);
     }
 }

idea/src/org/jetbrains/jet/lang/resolve/JetModuleUtil.java

@@ -0,0 +1,14 @@
+package org.jetbrains.jet.lang.resolve;
+
+import org.jetbrains.jet.lang.psi.JetElement;
+import org.jetbrains.jet.lang.psi.JetReferenceExpression;
+
+/**
+ * @author abreslav
+ */
+public class JetModuleUtil {
+    public static JetScope getRootNamespaceScope(JetElement expression) {
+        // TODO: this is a stub: at least the modules' root namespaces must be indexed here
+        return JetScope.EMPTY;
+    }
+}

idea/src/org/jetbrains/jet/lang/resolve/JetScope.java

@@ -0,0 +1,40 @@
+package org.jetbrains.jet.lang.resolve;
+
+import org.jetbrains.jet.lang.modules.MemberDomain;
+import org.jetbrains.jet.lang.modules.NamespaceDomain;
+import org.jetbrains.jet.lang.types.*;
+
+/**
+ * @author abreslav
+ */
+public interface JetScope extends NamespaceDomain, MemberDomain {
+    JetScope EMPTY = new JetScopeImpl() {};
+
+    abstract class JetScopeImpl implements JetScope {
+        @Override
+        public MethodDescriptor getMethods(String name) {
+            return null;
+        }
+
+        @Override
+        public ClassDescriptor getClass(String name) {
+            return null;
+        }
+
+        @Override
+        public PropertyDescriptor getProperty(String name) {
+            return null;
+        }
+
+        @Override
+        public ExtensionDescriptor getExtension(String name) {
+            return null;
+        }
+
+        @Override
+        public NamespaceDescriptor getNamespace(String namespaceName) {
+            return null;
+        }
+    };
+
+}

idea/src/org/jetbrains/jet/lang/resolve/TypeResolver.java

@@ -0,0 +1,70 @@
+package org.jetbrains.jet.lang.resolve;
+
+import org.jetbrains.annotations.Nullable;
+import org.jetbrains.jet.lang.modules.MemberDomain;
+import org.jetbrains.jet.lang.psi.JetReferenceExpression;
+import org.jetbrains.jet.lang.psi.JetUserType;
+import org.jetbrains.jet.lang.types.ClassDescriptor;
+import org.jetbrains.jet.lang.types.NamespaceDescriptor;
+
+/**
+ * @author abreslav
+ */
+public class TypeResolver {
+
+    public static final TypeResolver INSTANCE = new TypeResolver();
+
+    private TypeResolver() {}
+
+    @Nullable
+    public ClassDescriptor resolveClass(JetScope scope, JetUserType userType) {
+        return resolveClass(scope, userType.getReferenceExpression());
+    }
+
+    @Nullable
+    private ClassDescriptor resolveClass(JetScope scope, JetReferenceExpression expression) {
+        if (expression.isAbsoluteInRootNamespace()) {
+            return resolveClass(JetModuleUtil.getRootNamespaceScope(expression), expression);
+        }
+
+        JetReferenceExpression qualifier = expression.getQualifier();
+        if (qualifier != null) {
+            // TODO: this is slow. The faster way would be to start with the first item in the quilified name
+            // TODO: priorities: class of namespace first?
+            MemberDomain domain = resolveClass(scope, qualifier);
+            if (domain == null) {
+                domain = resolveNamespace(scope, qualifier);
+            }
+
+            if (domain != null) {
+                return domain.getClass(expression.getReferencedName());
+            }
+            return null;
+        }
+
+        assert qualifier == null;
+
+        return scope.getClass(expression.getReferencedName());
+    }
+
+    @Nullable
+    private NamespaceDescriptor resolveNamespace(JetScope scope, JetReferenceExpression expression) {
+        if (expression.isAbsoluteInRootNamespace()) {
+            return resolveNamespace(JetModuleUtil.getRootNamespaceScope(expression), expression);
+        }
+
+        JetReferenceExpression qualifier = expression.getQualifier();
+        if (qualifier != null) {
+            NamespaceDescriptor domain = resolveNamespace(scope, qualifier);
+            if (domain == null) {
+                return null;
+            }
+            return domain.getNamespace(expression.getReferencedName());
+        }
+
+        assert qualifier == null;
+
+        return scope.getNamespace(expression.getReferencedName());
+    }
+
+}

idea/src/org/jetbrains/jet/lang/types/ClassDescriptor.java

@@ -1,5 +1,7 @@
 package org.jetbrains.jet.lang.types;
 
+import org.jetbrains.jet.lang.modules.MemberDomain;
+
 import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
@@ -7,7 +9,7 @@ import java.util.List;
 /**
  * @author abreslav
  */
-public class ClassDescriptor extends MemberDescriptorImpl {
+public class ClassDescriptor extends MemberDescriptorImpl implements MemberDomain {
     private final TypeConstructor typeConstructor;
 
     public ClassDescriptor(
@@ -26,4 +28,23 @@ public class ClassDescriptor extends MemberDescriptorImpl {
     public TypeConstructor getTypeConstructor() {
         return typeConstructor;
     }
+
+    public ClassDescriptor getClass(String referencedName) {
+        throw new UnsupportedOperationException(); // TODO
+    }
+
+    @Override
+    public MethodDescriptor getMethods(String name) {
+        throw new UnsupportedOperationException(); // TODO
+    }
+
+    @Override
+    public PropertyDescriptor getProperty(String name) {
+        throw new UnsupportedOperationException(); // TODO
+    }
+
+    @Override
+    public ExtensionDescriptor getExtension(String name) {
+        throw new UnsupportedOperationException(); // TODO
+    }
 }

idea/src/org/jetbrains/jet/lang/types/ExtensionDescriptor.java

@@ -0,0 +1,7 @@
+package org.jetbrains.jet.lang.types;
+
+/**
+ * @author abreslav
+ */
+public class ExtensionDescriptor {
+}

idea/src/org/jetbrains/jet/lang/types/JetTypeChecker.java

@@ -64,7 +64,7 @@ public class JetTypeChecker {
     }
 
     public boolean isSubtypeOf(Type subtype, Type supertype) {
-
+//        subtype.getConstructor().getSupertypes()
         return false;
     }
 }

idea/src/org/jetbrains/jet/lang/types/MethodDescriptor.java

@@ -0,0 +1,7 @@
+package org.jetbrains.jet.lang.types;
+
+/**
+ * @author abreslav
+ */
+public class MethodDescriptor {
+}

idea/src/org/jetbrains/jet/lang/types/NamespaceDescriptor.java

@@ -1,7 +1,34 @@
 package org.jetbrains.jet.lang.types;
 
+import org.jetbrains.jet.lang.modules.MemberDomain;
+import org.jetbrains.jet.lang.modules.NamespaceDomain;
+
 /**
  * @author abreslav
  */
-public class NamespaceDescriptor {
+public class NamespaceDescriptor implements NamespaceDomain, MemberDomain {
+    @Override
+    public ClassDescriptor getClass(String name) {
+        throw new UnsupportedOperationException(); // TODO
+    }
+
+    @Override
+    public MethodDescriptor getMethods(String name) {
+        throw new UnsupportedOperationException(); // TODO
+    }
+
+    @Override
+    public PropertyDescriptor getProperty(String name) {
+        throw new UnsupportedOperationException(); // TODO
+    }
+
+    @Override
+    public ExtensionDescriptor getExtension(String name) {
+        throw new UnsupportedOperationException(); // TODO
+    }
+
+    @Override
+    public NamespaceDescriptor getNamespace(String namespaceName) {
+        throw new UnsupportedOperationException(); // TODO
+    }
 }

idea/src/org/jetbrains/jet/lang/types/PropertyDescriptor.java

@@ -0,0 +1,7 @@
+package org.jetbrains.jet.lang.types;
+
+/**
+ * @author abreslav
+ */
+public class PropertyDescriptor {
+}

idea/tests/org/jetbrains/jet/types/JetTypeCheckerTest.java

@@ -4,9 +4,9 @@ import com.intellij.codeInsight.daemon.LightDaemonAnalyzerTestCase;
 import com.intellij.openapi.application.PathManager;
 import com.intellij.openapi.project.Project;
 import org.jetbrains.jet.lang.psi.*;
-import org.jetbrains.jet.lang.types.JetStandardTypes;
-import org.jetbrains.jet.lang.types.JetTypeChecker;
-import org.jetbrains.jet.lang.types.Type;
+import org.jetbrains.jet.lang.resolve.JetScope;
+import org.jetbrains.jet.lang.resolve.TypeResolver;
+import org.jetbrains.jet.lang.types.*;
 import org.jetbrains.jet.parsing.JetParsingTest;
 
 import java.io.File;
@@ -17,6 +17,30 @@ import java.util.List;
  */
 public class JetTypeCheckerTest extends LightDaemonAnalyzerTestCase {
 
+    private static final JetScope BASIC_SCOPE = new JetScope.JetScopeImpl() {
+        @Override
+        public ClassDescriptor getClass(String name) {
+            if ("Int".equals(name)) {
+                return JetStandardClasses.getInt();
+            } else if ("Boolean".equals(name)) {
+                return JetStandardClasses.getInt();
+            } else if ("Byte".equals(name)) {
+                return JetStandardClasses.getInt();
+            } else if ("Char".equals(name)) {
+                return JetStandardClasses.getInt();
+            } else if ("Short".equals(name)) {
+                return JetStandardClasses.getInt();
+            } else if ("Long".equals(name)) {
+                return JetStandardClasses.getInt();
+            } else if ("Float".equals(name)) {
+                return JetStandardClasses.getInt();
+            } else if ("Double".equals(name)) {
+                return JetStandardClasses.getInt();
+            }
+            return null;
+        }
+    };
+
     @Override
     protected String getTestDataPath() {
         return getHomeDirectory() + "/idea/testData";
@@ -111,30 +135,36 @@ public class JetTypeCheckerTest extends LightDaemonAnalyzerTestCase {
         JetTypeElement typeElement = typeNode.getTypeElement();
         List<JetTypeReference> typeArguments = typeNode.getTypeArguments();
 
-        typeElement.accept(new JetVisitor());
+        final Type[] result = new Type[1];
+        typeElement.accept(new JetVisitor() {
+            @Override
+            public void visitUserType(JetUserType type) {
+                result[0] = new ClassType(TypeResolver.INSTANCE.resolveClass(BASIC_SCOPE, type));
+            }
+        });
 
-        throw new UnsupportedOperationException(); // TODO
+        return result[0];
     }
 
     public void testImplicitConversions() throws Exception {
         assertConvertibleTo("1", JetStandardTypes.getByte());
     }
 
-    private void assertConvertibleTo(String expression, Type type) {
+    private static void assertConvertibleTo(String expression, Type type) {
         JetExpression jetExpression = JetChangeUtil.createExpression(getProject(), expression);
         assertTrue(
                 expression + " must be convertible to " + type,
                 new JetTypeChecker().isConvertibleTo(jetExpression, type));
     }
 
-    private void assertNotConvertibleTo(String expression, Type type) {
+    private static void assertNotConvertibleTo(String expression, Type type) {
         JetExpression jetExpression = JetChangeUtil.createExpression(getProject(), expression);
         assertFalse(
                 expression + " must not be convertible to " + type,
                 new JetTypeChecker().isConvertibleTo(jetExpression, type));
     }
 
-    private void assertType(String expression, Type expectedType) {
+    private static void assertType(String expression, Type expectedType) {
         Project project = getProject();
         JetExpression jetExpression = JetChangeUtil.createExpression(project, expression);
         Type type = new JetTypeChecker().getType(jetExpression);