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/* valamemberinitializer.vala
*
* Copyright (C) 2007-2010 Jürg Billeter
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Author:
* Jürg Billeter <j@bitron.ch>
*/
using GLib;
/**
* Represents a member initializer, i.e. an element of an object initializer, in
* the source code.
*/
public class Vala.MemberInitializer : Expression {
/**
* Member name.
*/
public string name { get; private set; }
/**
* Initializer expression.
*/
public Expression initializer {
get { return _initializer; }
private set {
_initializer = value;
_initializer.parent_node = this;
}
}
Expression _initializer;
/**
* Creates a new member initializer.
*
* @param name member name
* @param initializer initializer expression
* @param source_reference reference to source code
* @return newly created member initializer
*/
public MemberInitializer (string name, Expression initializer, SourceReference? source_reference = null) {
this.initializer = initializer;
this.source_reference = source_reference;
this.name = name;
}
public override bool is_pure () {
return false;
}
public override void accept (CodeVisitor visitor) {
initializer.accept (visitor);
}
public override bool check (CodeContext context) {
if (checked) {
return !error;
}
checked = true;
unowned ObjectCreationExpression? oce = parent_node as ObjectCreationExpression;
if (oce == null) {
error = true;
Report.error (source_reference, "internal: Invalid member initializer");
return false;
}
unowned DataType type = oce.type_reference;
symbol_reference = SemanticAnalyzer.symbol_lookup_inherited (type.type_symbol, name);
if (!(symbol_reference is Field || symbol_reference is Property)) {
error = true;
Report.error (source_reference, "Invalid member `%s' in `%s'", name, type.type_symbol.get_full_name ());
return false;
}
// FIXME Code duplication with MemberAccess.check()
if (symbol_reference.access == SymbolAccessibility.PROTECTED && symbol_reference.parent_symbol is TypeSymbol) {
unowned TypeSymbol target_type = (TypeSymbol) symbol_reference.parent_symbol;
bool in_subtype = false;
for (Symbol this_symbol = context.analyzer.current_symbol; this_symbol != null; this_symbol = this_symbol.parent_symbol) {
if (this_symbol == target_type) {
// required for interfaces with non-abstract methods
// accessing protected interface members
in_subtype = true;
break;
}
unowned Class? cl = this_symbol as Class;
if (cl != null && cl.is_subtype_of (target_type)) {
in_subtype = true;
break;
}
}
if (!in_subtype) {
error = true;
Report.error (source_reference, "Access to protected member `%s' denied", symbol_reference.get_full_name ());
return false;
}
} else if (symbol_reference.access == SymbolAccessibility.PRIVATE) {
unowned Symbol? target_type = symbol_reference.parent_symbol;
bool in_target_type = false;
for (Symbol this_symbol = context.analyzer.current_symbol; this_symbol != null; this_symbol = this_symbol.parent_symbol) {
if (target_type == this_symbol) {
in_target_type = true;
break;
}
}
if (!in_target_type) {
error = true;
Report.error (source_reference, "Access to private member `%s' denied", symbol_reference.get_full_name ());
return false;
}
}
DataType member_type = null;
if (symbol_reference is Field) {
unowned Field f = (Field) symbol_reference;
member_type = f.variable_type;
} else if (symbol_reference is Property) {
unowned Property prop = (Property) symbol_reference;
member_type = prop.property_type;
if (prop.set_accessor == null || !prop.set_accessor.writable) {
error = true;
Report.error (source_reference, "Property `%s' is read-only", prop.get_full_name ());
return false;
}
}
initializer.formal_target_type = member_type;
initializer.target_type = initializer.formal_target_type.get_actual_type (type, null, this);
if (!initializer.check (context)) {
return false;
}
if (initializer.value_type == null || !initializer.value_type.compatible (initializer.target_type)) {
error = true;
Report.error (source_reference, "Invalid type for member `%s'", name);
return false;
}
return !error;
}
public override void emit (CodeGenerator codegen) {
initializer.emit (codegen);
}
public override void get_used_variables (Collection<Variable> collection) {
initializer.get_used_variables (collection);
}
public override void replace_expression (Expression old_node, Expression new_node) {
if (initializer == old_node) {
initializer = new_node;
}
}
}
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