private void AddRule(ProductionRule rule)
{
//ASSUMPTION: LHS of first rule in grammar file is root symbol
if (_rules.Count == 0)
{
_rootSymbol = rule.LHS;
_rhsIndex.Add(_rootSymbol.Text, new List <ProductionRule>());
}
_rules.Add(rule);
AddToLhsIndex(rule);
AddToRhsIndex(rule);
if (rule.RHS.Length == 1 && rule.RHS[0].Type == SymbolType.Terminal)
{
AddToTerminalIndex(rule);
}
if (rule.RHS[0].Type == SymbolType.Nonterminal)
{
AddToNonterminalIndex(rule);
}
}
private void AddToLhsIndex(ProductionRule rule)
{
if (!_lhsIndex.ContainsKey(rule.LHS.Text))
_lhsIndex.Add(rule.LHS.Text, new List<Symbol[]>());
_lhsIndex[rule.LHS.Text].Add(rule.RHS);
}
private void AddToLhsIndex(ProductionRule rule)
{
if (!_lhsIndex.ContainsKey(rule.LHS.Text))
{
_lhsIndex.Add(rule.LHS.Text, new List <Symbol[]>());
}
_lhsIndex[rule.LHS.Text].Add(rule.RHS);
}
private void AddToNonterminalIndex(ProductionRule rule)
{
if (!_nonterminalIndex.ContainsKey(rule.RHS[0].Text))
{
_nonterminalIndex.Add(rule.RHS[0].Text, new List <ProductionRule>());
}
_nonterminalIndex[rule.RHS[0].Text].Add(rule);
}
private void AddToRhsIndex(ProductionRule rule)
{
if (!_rhsIndex.ContainsKey(rule.RHS[0].Text))
{
_rhsIndex.Add(rule.RHS[0].Text, new List <ProductionRule>());
}
_rhsIndex[rule.RHS[0].Text].Add(rule);
}
private void ParseRule(string line)
{
ProductionRule rule = new ProductionRule(line);
// Add the inverse rule for any binary rule
if (rule.RHS.Length > 1)
{
ProductionRule ruleInverse = new ProductionRule(line);
ruleInverse.FlipRHS();
rule.ScaleProbability(RULE_SCALE);
ruleInverse.ScaleProbability(INVERSE_RULE_SCALE);
AddRule(ruleInverse);
}
AddRule(rule);
}
private void AddRule(ProductionRule rule)
{
//ASSUMPTION: LHS of first rule in grammar file is root symbol
if (_rules.Count == 0)
{
_rootSymbol = rule.LHS;
_rhsIndex.Add(_rootSymbol.Text, new List<ProductionRule>());
}
_rules.Add(rule);
AddToLhsIndex(rule);
AddToRhsIndex(rule);
if (rule.RHS.Length == 1 && rule.RHS[0].Type == SymbolType.Terminal)
AddToTerminalIndex(rule);
if (rule.RHS[0].Type == SymbolType.Nonterminal)
AddToNonterminalIndex(rule);
}
private void AddToNonterminalIndex(ProductionRule rule)
{
if (!_nonterminalIndex.ContainsKey(rule.RHS[0].Text))
_nonterminalIndex.Add(rule.RHS[0].Text, new List<ProductionRule>());
_nonterminalIndex[rule.RHS[0].Text].Add(rule);
}
private void ParseRule(string line)
{
ProductionRule rule = new ProductionRule(line);
// Add the inverse rule for any binary rule
if (rule.RHS.Length > 1)
{
ProductionRule ruleInverse = new ProductionRule(line);
ruleInverse.FlipRHS();
rule.ScaleProbability(RULE_SCALE);
ruleInverse.ScaleProbability(INVERSE_RULE_SCALE);
AddRule(ruleInverse);
}
AddRule(rule);
}
private void AddToRhsIndex(ProductionRule rule)
{
if (!_rhsIndex.ContainsKey(rule.RHS[0].Text))
_rhsIndex.Add(rule.RHS[0].Text, new List<ProductionRule>());
_rhsIndex[rule.RHS[0].Text].Add(rule);
}
