/// <summary>
/// The constructor transfers all normalized data from the <see cref="IGrammarData" /> to the table generator, but does not yet compute any table-related data
/// </summary>
/// <param name="data">The data describing the grammar</param>
public LalrTableGenerator(IGrammarData data) : base()
{
this.symbols = data.Symbols.ToDictionary();
this.Unknown = this.AssertTerminal(data.Unknown, nameof(this.Unknown));
this.Eof = this.AssertTerminal(SymbolId.Eof, nameof(this.Eof));
this.Init = this.AssertNonterminal(data.Init, nameof(this.Init));
this.Start = this.AssertNonterminal(data.Start, nameof(this.Start));
var productionKeys = new HashSet <ProductionKey>();
var productionRules = new List <ProductionRule>();
var productionRulesBySymbol = new Dictionary <SymbolId, List <ProductionRule> >();
var addProduction = new Action <SymbolId, SymbolIdSequence>((productionSymbolId, ruleSymbolIds) => {
if (productionKeys.Add(new ProductionKey(productionSymbolId, ruleSymbolIds)))
{
var productionRule = new ProductionRule(productionRules.Count, productionSymbolId, ruleSymbolIds);
productionRules.Add(productionRule);
if (!productionRulesBySymbol.TryGetValue(productionSymbolId, out var productions))
{
productions = new List <ProductionRule>();
productionRulesBySymbol.Add(productionSymbolId, productions);
}
productions.Add(productionRule);
}
});
addProduction(this.Init, new SymbolIdSequence(this.Start.Yield()));
foreach (var production in data.Productions.Where(p => p.Value != null))
{
addProduction(production.Key, production.Value);
}
this.ProductionRules = productionRules;
this.ProductionRulesBySymbol = productionRulesBySymbol.ToDictionary(p => p.Key, p => (IReadOnlyCollection <ProductionRule>)p.Value);
}
protected SemanticParserGrammar(IGrammarData grammarData)
{
this.ParserStateMachine = grammarData.ParserStateMachine.Compile();
this.LexerStateMachine = grammarData.LexerStateMachine.Compile();
this.ResolveSymbol = grammarData.Symbols.CreateGetter();
this.SymbolsByName = grammarData.SymbolsByName;
this.terminalFlags = grammarData.TerminalFlags;
}
