private void Grammar_MenuItem_Click( object sender, EventArgs e )
{
if( this.parser.IsParsing )
return; //TODO: ask user?
using( var dlg = new GrammarForm() )
{
dlg.Text = "Nyelvtan szerkesztő";
dlg.Grammar = this.ext_grammar != null ? this.ext_grammar.RestrictedGrammar.BaseGrammar : null;
if( dlg.ShowDialog(this) == System.Windows.Forms.DialogResult.OK )
{
try
{
var grammar = dlg.Grammar;
var rst_grammar = new RestrictedStartSymbolGrammar(grammar);
this.ext_grammar = new ExtendedGrammar(rst_grammar);
this.canonical_sets = SyntacticAnalysis.LR.LR0CanonicalSets.Build(rst_grammar);
this.epsilon_grammaticals = EpsilonGrammaticals.Build(grammar);
this.follow_sets = FollowSets.Build(this.ext_grammar, this.epsilon_grammaticals);
this.parser_table = SyntacticAnalysis.LR.SLR1ParserTableBuilder.Build(
this.ext_grammar, this.canonical_sets, this.follow_sets);
}
catch( Exception ex )
{
MessageBox.Show(this,
ex.Message, "A Nyelvtant nem tudom használni",
MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
this.ext_grammar = null;
this.canonical_sets = null;
this.epsilon_grammaticals = null;
this.follow_sets = null;
this.parser_table = null;
}
// Update controls
if( this.ext_grammar != null )
{
this.ParserStart_ToolButton.Enabled = true;
this.ParserView.ClearInputHistory();
this.ParserTable.SetTable(this.ext_grammar, this.parser_table);
this.DfsmView.SetCanonicalSets(this.ext_grammar.RestrictedGrammar.BaseGrammar, this.canonical_sets);
this.DfsmView.Invalidate();
this.SyntacticTreeView.ClearNodes();
}
else
{
this.ParserStart_ToolButton.Enabled = false;
}
}
}
}
public void SetTable( SyntacticAnalysis.ExtendedGrammar grammar, SyntacticAnalysis.LR.ParserTable table )
{
this.grammar = grammar;
this.table = table;
this.UpdateTable();
}
