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/* valaexpression.vala
*
* Copyright (C) 2006-2007 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;
using Gee;
/**
* Base class for all code nodes that might be used as an expression.
*/
public abstract class Vala.Expression : CodeNode {
/**
* The static type of this expression.
*
* The semantic analyzer computes this value.
*/
public DataType static_type { get; set; }
/*
* The static type this expression is expected to have.
*
* The semantic analyzer computes this value, lambda expressions use it.
*/
public DataType expected_type { get; set; }
/**
* The symbol this expression refers to.
*/
public weak Symbol symbol_reference { get; set; }
/**
* Specifies that this expression transfers ownership without a receiver
* being present.
*
* The memory manager computes this value, the code generator uses it.
*/
public bool ref_leaked { get; set; }
/**
* Specifies that this expression is expected to transfer ownership but
* doesn't.
*
* The memory manager computes this value, the code generator uses it.
*/
public bool ref_missing { get; set; }
/**
* Specifies that this expression successfully transfers ownership.
*/
public bool ref_sink { get; set; }
/**
* Specifies that this expression may throw an exception.
*/
public bool can_fail { get; set; }
/**
* Contains all temporary variables this expression requires for
* execution.
*
* The code generator sets and uses them for memory management.
*/
public ArrayList<VariableDeclarator> temp_vars = new ArrayList<VariableDeclarator> ();
/**
* Returns whether this expression is pure, i.e. whether this expression
* is free of side-effects.
*/
public abstract bool is_pure ();
}
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