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Diffstat (limited to 'vala/valascope.vala')
| -rw-r--r-- | vala/valascope.vala | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/vala/valascope.vala b/vala/valascope.vala new file mode 100644 index 000000000..745c8e58a --- /dev/null +++ b/vala/valascope.vala @@ -0,0 +1,89 @@ +/* valascope.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 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 part of the symbol tree. + */ +public class Vala.Scope { + /** + * The symbol that owns this scope. + */ + public weak Symbol owner { get; set; } + + /** + * The parent of this scope. + */ + public weak Scope parent_scope { get; set; } + + private HashTable<string,Symbol> symbol_table; + + /** + * Creates a new scope. + * + * @return newly created scope + */ + public Scope (construct Symbol owner = null) { + } + + /** + * Adds the specified symbol with the specified name to the symbol table + * of this scope. + * + * @param name name for the specified symbol + * @param sym a symbol + */ + public void add (string name, Symbol! sym) { + if (name != null) { + if (symbol_table == null) { + symbol_table = new HashTable.full (str_hash, str_equal, g_free, g_object_unref); + } else if (lookup (name) != null) { + owner.error = true; + Report.error (owner.source_reference, "`%s' already contains a definition for `%s'".printf (owner.get_full_name (), name)); + return; + } + + symbol_table.insert (name, sym); + } + sym.owner = this; + } + + /** + * Returns the symbol stored in the symbol table with the specified + * name. + * + * @param name name of the symbol to be returned + * @return found symbol or null + */ + public Symbol lookup (string! name) { + if (symbol_table == null) { + return null; + } + Symbol sym = symbol_table.lookup (name); + if (sym != null && !sym.active) { + sym = null; + } + return sym; + } +} + |