Examples with NothingType org.eclipse.ceylon.model.typechecker.model.NothingType used on opensource projects

Example 1 with NothingType

use of org.eclipse.ceylon.model.typechecker.model.NothingType in project ceylon by eclipse.

the class CeylonDoc method getIcons.

protected final List<String> getIcons(Object obj) {
    List<String> icons = new ArrayList<String>();
    if (obj instanceof Declaration) {
        Declaration decl = (Declaration) obj;
        Annotation deprecated = Util.findAnnotation(decl, "deprecated");
        if (deprecated != null) {
            icons.add("icon-decoration-deprecated");
        }
        if (decl instanceof ClassOrInterface || decl instanceof Constructor) {
            if (decl instanceof Interface) {
                icons.add("icon-interface");
                if (Util.isEnumerated((ClassOrInterface) decl)) {
                    icons.add("icon-decoration-enumerated");
                }
            }
            if (decl instanceof Class) {
                Class klass = (Class) decl;
                if (klass.isAnonymous()) {
                    icons.add("icon-object");
                } else {
                    icons.add("icon-class");
                }
                if (klass.isAbstract()) {
                    icons.add("icon-decoration-abstract");
                }
                if (klass.isFinal() && !klass.isAnonymous() && !klass.isAnnotation()) {
                    icons.add("icon-decoration-final");
                }
                if (Util.isEnumerated(klass)) {
                    icons.add("icon-decoration-enumerated");
                }
            }
            if (decl instanceof Constructor) {
                icons.add("icon-class");
            }
            if (!decl.isShared()) {
                icons.add("icon-decoration-local");
            }
        }
        if (decl instanceof TypedDeclaration) {
            if (decl.isShared()) {
                icons.add("icon-shared-member");
            } else {
                icons.add("icon-local-member");
            }
            if (decl.isFormal()) {
                icons.add("icon-decoration-formal");
            }
            if (decl.isActual()) {
                Declaration refinedDeclaration = decl.getRefinedDeclaration();
                if (refinedDeclaration != null) {
                    if (refinedDeclaration.isFormal()) {
                        icons.add("icon-decoration-impl");
                    }
                    if (refinedDeclaration.isDefault()) {
                        icons.add("icon-decoration-over");
                    }
                }
            }
            if (((TypedDeclaration) decl).isVariable()) {
                icons.add("icon-decoration-variable");
            }
        }
        if (decl instanceof TypeAlias || decl instanceof NothingType) {
            icons.add("icon-type-alias");
        }
        if (decl.isAnnotation()) {
            icons.add("icon-decoration-annotation");
        }
    }
    if (obj instanceof Package) {
        Package pkg = (Package) obj;
        icons.add("icon-package");
        if (!pkg.isShared()) {
            icons.add("icon-decoration-local");
        }
    }
    if (obj instanceof ModuleImport) {
        ModuleImport moduleImport = (ModuleImport) obj;
        icons.add("icon-module");
        if (moduleImport.isExport()) {
            icons.add("icon-module-exported-decoration");
        }
        if (moduleImport.isOptional()) {
            icons.add("icon-module-optional-decoration");
        }
    }
    if (obj instanceof Module) {
        icons.add("icon-module");
    }
    return icons;
}

Example 2 with NothingType

use of org.eclipse.ceylon.model.typechecker.model.NothingType in project ceylon by eclipse.

the class CeylonDocTool method docNothingType.

private void docNothingType(Package pkg) throws IOException {
    final Annotation nothingDoc = new Annotation();
    nothingDoc.setName("doc");
    nothingDoc.addPositionalArgument("The special type _Nothing_ represents: \n" + " - the intersection of all types, or, equivalently \n" + " - the empty set \n" + "\n" + "_Nothing_ is assignable to all other types, but has no instances. \n" + "A reference to a member of an expression of type _Nothing_ is always an error, since there can never be a receiving instance. \n" + "_Nothing_ is considered to belong to the module _ceylon.language_. However, it cannot be defined within the language. \n" + "\n" + "Because of the restrictions imposed by Ceylon's mixin inheritance model: \n" + "- If X and Y are classes, and X is not a subclass of Y, and Y is not a subclass of X, then the intersection type X&Y is equivalent to _Nothing_. \n" + "- If X is an interface, the intersection type X&Nothing is equivalent to _Nothing_. \n" + "- If X<T> is invariant in its type parameter T, and the distinct types A and B do not involve type parameters, then X<A>&X<B> is equivalent to _Nothing_. \n");
    NothingType nothingType = new NothingType(pkg.getUnit()) {

        @Override
        public List<Annotation> getAnnotations() {
            return Collections.singletonList(nothingDoc);
        }
    };
    doc(nothingType);
}

Example 3 with NothingType

use of org.eclipse.ceylon.model.typechecker.model.NothingType in project ceylon by eclipse.

the class TypeVisitor method visit.

@Override
public void visit(Tree.SatisfiedTypes that) {
    super.visit(that);
    TypeDeclaration td = (TypeDeclaration) that.getScope();
    if (td.isAlias()) {
        return;
    }
    List<Tree.StaticType> types = that.getTypes();
    List<Type> list = new ArrayList<Type>(types.size());
    if (types.isEmpty()) {
        that.addError("missing types in satisfies");
    }
    boolean foundTypeParam = false;
    boolean foundClass = false;
    boolean foundInterface = false;
    for (Tree.StaticType st : types) {
        inheritedType(st);
        Type type = st.getTypeModel();
        if (type != null) {
            TypeDeclaration std = type.getDeclaration();
            if (std != null && !(std instanceof UnknownType)) {
                if (std == td) {
                // unnecessary, handled by SupertypeVisitor
                // st.addError("directly extends itself: '" +
                // td.getName() + "'");
                } else if (std instanceof NothingType) {
                    st.addError("satisfies the bottom type 'Nothing'");
                } else if (std instanceof TypeAlias) {
                    st.addError("satisfies a type alias: '" + type.getDeclaration().getName(unit) + "'");
                } else if (std instanceof Constructor) {
                // nothing to do
                } else if (td instanceof TypeParameter) {
                    if (foundTypeParam) {
                        st.addUnsupportedError("type parameter upper bounds are not yet supported in combination with other bounds");
                    } else if (std instanceof TypeParameter) {
                        if (foundClass || foundInterface) {
                            st.addUnsupportedError("type parameter upper bounds are not yet supported in combination with other bounds");
                        }
                        foundTypeParam = true;
                        list.add(type);
                    } else if (std instanceof Class) {
                        if (foundClass) {
                            st.addUnsupportedError("multiple class upper bounds are not yet supported");
                        }
                        foundClass = true;
                        list.add(type);
                    } else if (std instanceof Interface) {
                        foundInterface = true;
                        list.add(type);
                    } else {
                        st.addError("upper bound must be a class, interface, or type parameter");
                    }
                } else {
                    if (std instanceof TypeParameter) {
                        st.addError("directly satisfies type parameter: '" + std.getName(unit) + "'");
                    } else if (std instanceof Class) {
                        st.addError("satisfies a class: '" + std.getName(unit) + "'");
                    } else if (std instanceof Interface) {
                        if (td.isDynamic() && !std.isDynamic()) {
                            st.addError("dynamic interface satisfies a non-dynamic interface: '" + std.getName(unit) + "'");
                        } else {
                            list.add(type);
                        }
                    } else {
                        st.addError("satisfied type must be an interface");
                    }
                }
            }
        }
    }
    td.setSatisfiedTypes(list);
}

Example 4 with NothingType

use of org.eclipse.ceylon.model.typechecker.model.NothingType in project ceylon by eclipse.

the class TypeVisitor method visit.

@Override
public void visit(Tree.ExtendedType that) {
    inExtendsOrClassAlias = that.getInvocationExpression() != null;
    super.visit(that);
    inExtendsOrClassAlias = false;
    inheritedType(that.getType());
    checkExtendedTypeExpression(that.getType());
    TypeDeclaration td = (TypeDeclaration) that.getScope();
    if (!td.isAlias()) {
        Tree.SimpleType et = that.getType();
        if (et != null) {
            Type type = et.getTypeModel();
            if (type != null) {
                TypeDeclaration etd = et.getDeclarationModel();
                if (etd != null && !(etd instanceof UnknownType)) {
                    if (etd instanceof Constructor) {
                        type = type.getExtendedType();
                        etd = etd.getExtendedType().getDeclaration();
                    }
                    if (etd == td) {
                    // unnecessary, handled by SupertypeVisitor
                    // et.addError("directly extends itself: '" +
                    // td.getName() + "'");
                    } else if (etd instanceof TypeParameter) {
                        et.addError("directly extends a type parameter: '" + type.getDeclaration().getName(unit) + "'");
                    } else if (etd instanceof Interface) {
                        et.addError("extends an interface: '" + type.getDeclaration().getName(unit) + "'");
                    } else if (etd instanceof TypeAlias) {
                        et.addError("extends a type alias: '" + type.getDeclaration().getName(unit) + "'");
                    } else if (etd instanceof NothingType) {
                        et.addError("extends the bottom type 'Nothing'");
                    } else {
                        td.setExtendedType(type);
                    }
                }
            }
        }
    }
}