1/* valatemplate.vala 2 * 3 * Copyright (C) 2009-2010 Jürg Billeter 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Lesser General Public 7 * License as published by the Free Software Foundation; either 8 * version 2.1 of the License, or (at your option) any later version. 9 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Lesser General Public License for more details. 14 15 * You should have received a copy of the GNU Lesser General Public 16 * License along with this library; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 18 * 19 * Author: 20 * Jürg Billeter <j@bitron.ch> 21 */ 22 23 24public class Vala.Template : Expression { 25 private List<Expression> expression_list = new ArrayList<Expression> (); 26 27 public Template (SourceReference? source_reference = null) { 28 this.source_reference = source_reference; 29 } 30 31 public override void accept (CodeVisitor visitor) { 32 visitor.visit_template (this); 33 } 34 35 public override void accept_children (CodeVisitor visitor) { 36 foreach (var expr in expression_list) { 37 expr.accept (visitor); 38 } 39 } 40 41 public void add_expression (Expression expr) { 42 expression_list.add (expr); 43 expr.parent_node = this; 44 } 45 46 public unowned List<Expression> get_expressions () { 47 return expression_list; 48 } 49 50 public override bool is_pure () { 51 return false; 52 } 53 54 Expression stringify (Expression expr) { 55 if (expr is StringLiteral) { 56 return expr; 57 } else { 58 return new MethodCall (new MemberAccess (expr, "to_string", expr.source_reference), expr.source_reference); 59 } 60 } 61 62 public override void replace_expression (Expression old_node, Expression new_node) { 63 int index = expression_list.index_of (old_node); 64 if (index >= 0) { 65 expression_list[index] = new_node; 66 new_node.parent_node = this; 67 } 68 } 69 70 public override bool check (CodeContext context) { 71 if (checked) { 72 return !error; 73 } 74 75 checked = true; 76 77 Expression expr; 78 79 if (expression_list.size == 0) { 80 expr = new StringLiteral ("\"\"", source_reference); 81 } else { 82 expr = stringify (expression_list[0]); 83 if (expression_list.size > 1) { 84 var concat = new MethodCall (new MemberAccess (expr, "concat", source_reference), source_reference); 85 for (int i = 1; i < expression_list.size; i++) { 86 concat.add_argument (stringify (expression_list[i])); 87 } 88 expr = concat; 89 } 90 } 91 expr.target_type = target_type; 92 93 context.analyzer.replaced_nodes.add (this); 94 parent_node.replace_expression (this, expr); 95 return expr.check (context); 96 } 97} 98 99