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/* valaregexliteral.vala
*
* Copyright (C) 2010 Jukka-Pekka Iivonen
* Copyright (C) 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:
* Jukka-Pekka Iivonen <jp0409@jippii.fi>
*/
using GLib;
/**
* Represents a regular expression literal in the source code.
*/
public class Vala.RegexLiteral : Literal {
/**
* The literal value.
*/
public string value { get; set; }
/**
* Creates a new regular expression literal.
*
* @param s the literal value
* @param source reference to source code
* @return newly created string literal
*/
public RegexLiteral (string value, SourceReference? source_reference = null) {
this.value = value;
this.source_reference = source_reference;
}
public override void accept (CodeVisitor visitor) {
visitor.visit_regex_literal (this);
visitor.visit_expression (this);
}
public override bool is_pure () {
return true;
}
public override bool is_non_null () {
return true;
}
public override string to_string () {
return value;
}
public override bool check (SemanticAnalyzer analyzer) {
if (checked) {
return !error;
}
checked = true;
if (!analyzer.context.experimental) {
Report.warning (source_reference, "regular expression literals are experimental");
}
try {
var regex = new GLib.Regex (value);
if (regex != null) { /* Regex is valid. */ }
} catch (RegexError err) {
error = true;
Report.error (source_reference, "Invalid regular expression `%s'.".printf (value));
return false;
}
value_type = analyzer.regex_type.copy ();
return !error;
}
public override void emit (CodeGenerator codegen) {
codegen.visit_regex_literal (this);
codegen.visit_expression (this);
}
}
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