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/* valainitializervala
*
* Copyright (C) 2006-2008 Jürg Billeter, Raffaele Sandrini
*
* 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>
* Raffaele Sandrini <raffaele@sandrini.ch>
*/
using GLib;
using Gee;
/**
* Represents an array or struct initializer list in the source code.
*/
public class Vala.InitializerList : Expression {
private Gee.List<Expression> initializers = new ArrayList<Expression> ();
/**
* Appends the specified expression to this initializer
*
* @param expr an expression
*/
public void append (Expression expr) {
initializers.add (expr);
expr.parent_node = this;
}
/**
* Returns a copy of the expression
*
* @return expression list
*/
public Gee.List<Expression> get_initializers () {
return new ReadOnlyList<Expression> (initializers);
}
/**
* Returns the initializer count in this initializer
*/
public int size {
get { return initializers.size; }
}
/**
* Creates a new initializer
*
* @param source_reference reference to source code
* @return newly created initializer list
*/
public InitializerList (SourceReference source_reference) {
this.source_reference = source_reference;
}
public override void accept_children (CodeVisitor visitor) {
foreach (Expression expr in initializers) {
expr.accept (visitor);
}
}
public override void accept (CodeVisitor visitor) {
visitor.visit_initializer_list (this);
}
public override bool is_pure () {
foreach (Expression initializer in initializers) {
if (!initializer.is_pure ()) {
return false;
}
}
return true;
}
public override void replace_expression (Expression old_node, Expression new_node) {
for (int i = 0; i < initializers.size; i++) {
if (initializers[i] == old_node) {
initializers[i] = new_node;
}
}
}
public override bool check (SemanticAnalyzer analyzer) {
if (checked) {
return !error;
}
checked = true;
if (target_type == null) {
error = true;
Report.error (source_reference, "initializer list used for unknown type");
return false;
} else if (target_type is ArrayType) {
/* initializer is used as array initializer */
var array_type = (ArrayType) target_type;
foreach (Expression e in get_initializers ()) {
e.target_type = array_type.element_type.copy ();
}
} else if (target_type.data_type is Struct) {
/* initializer is used as struct initializer */
var st = (Struct) target_type.data_type;
var field_it = st.get_fields ().iterator ();
foreach (Expression e in get_initializers ()) {
Field field = null;
while (field == null) {
if (!field_it.next ()) {
error = true;
Report.error (e.source_reference, "too many expressions in initializer list for `%s'".printf (target_type.to_string ()));
return false;
}
field = field_it.get ();
if (field.binding != MemberBinding.INSTANCE) {
// we only initialize instance fields
field = null;
}
}
e.target_type = field.field_type.copy ();
if (!target_type.value_owned) {
e.target_type.value_owned = false;
}
}
} else {
error = true;
Report.error (source_reference, "initializer list used for `%s', which is neither array nor struct".printf (target_type.to_string ()));
return false;
}
foreach (Expression expr in initializers) {
expr.check (analyzer);
}
bool error = false;
foreach (Expression e in get_initializers ()) {
if (e.value_type == null) {
error = true;
continue;
}
var unary = e as UnaryExpression;
if (unary != null && (unary.operator == UnaryOperator.REF || unary.operator == UnaryOperator.OUT)) {
// TODO check type for ref and out expressions
} else if (!e.value_type.compatible (e.target_type)) {
error = true;
e.error = true;
Report.error (e.source_reference, "Expected initializer of type `%s' but got `%s'".printf (e.target_type.to_string (), e.value_type.to_string ()));
}
}
if (!error) {
/* everything seems to be correct */
value_type = target_type;
}
return !error;
}
public override bool in_single_basic_block () {
foreach (Expression initializer in initializers) {
if (!initializer.in_single_basic_block ()) {
return false;
}
}
return true;
}
}
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