public void GrammarModelShouldAddProductionModel()
{
var grammar = new GrammarModel();
grammar.Productions.Add(
new ProductionModel(""));
Assert.AreEqual(1, grammar.Productions.Count);
}
private void Definition(EbnfDefinition definition, GrammarModel grammarModel)
{
Block(definition.Block, grammarModel);
if (definition.NodeType != EbnfNodeType.EbnfDefinitionConcatenation)
return;
var definitionConcatenation = definition as EbnfDefinitionConcatenation;
Definition(definitionConcatenation.Definition, grammarModel);
}
public void GrammarModelConstructorGivenOnlyStartProductionShouldTraverseRecursiveStructureOnlyOnce()
{
var S = new ProductionModel("S");
var A = new ProductionModel("A");
S.AddWithAnd(S);
S.AddWithOr(A);
A.AddWithAnd(new LexerRuleModel(new StringLiteralLexerRule("a")));
var grammarModel = new GrammarModel(S);
var grammar = grammarModel.ToGrammar();
Assert.AreEqual(3, grammar.Productions.Count);
}
void Block(EbnfBlock block, GrammarModel grammarModel)
{
switch (block.NodeType)
{
case EbnfNodeType.EbnfBlockLexerRule:
break;
case EbnfNodeType.EbnfBlockRule:
var blockRule = block as EbnfBlockRule;
foreach (var production in Rule(blockRule.Rule))
grammarModel.Productions.Add(production);
break;
case EbnfNodeType.EbnfBlockSetting:
break;
}
}
public void GrammarModelConstructorGivenOnlyStartProductionShouldDiscoverLinkedProductions()
{
var S = new ProductionModel("S");
var A = new ProductionModel("A");
var B = new ProductionModel("B");
var C = new ProductionModel("C");
S.AddWithAnd(A);
A.AddWithAnd(B);
A.AddWithOr(C);
B.AddWithAnd(new LexerRuleModel(new StringLiteralLexerRule("b")));
C.AddWithAnd(new LexerRuleModel(new StringLiteralLexerRule("c")));
var grammarModel = new GrammarModel(S);
var grammar = grammarModel.ToGrammar();
Assert.AreEqual(5, grammar.Productions.Count);
}
public GrammarExpression(
ProductionExpression start,
IEnumerable<ProductionExpression> productions,
IEnumerable<ILexerRule> ignore)
{
GrammarModel = new GrammarModel
{
Start = start.ProductionModel
};
if (productions != null)
foreach (var production in productions)
GrammarModel.Productions.Add(production.ProductionModel);
if (ignore != null)
foreach (var ignoreRule in ignore)
GrammarModel.IgnoreRules.Add(new LexerRuleModel(ignoreRule));
}
public void GrammarModelGivenNullStartShouldResolveStartFromProductions()
{
var S = new ProductionModel("S");
var A = new ProductionModel("A");
var B = new ProductionModel("B");
S.AddWithAnd(A);
S.AddWithAnd(B);
A.AddWithAnd(new LexerRuleModel(new StringLiteralLexerRule("a")));
A.AddWithAnd(B);
B.AddWithAnd(new LexerRuleModel(new StringLiteralLexerRule("b")));
var grammarModel = new GrammarModel();
grammarModel.Productions.Add(S);
grammarModel.Productions.Add(A);
grammarModel.Productions.Add(B);
var grammar = grammarModel.ToGrammar();
Assert.AreEqual(3, grammar.Productions.Count);
Assert.IsNotNull(grammar.Start);
}
public IGrammar Generate(EbnfDefinition ebnf)
{
var grammarModel = new GrammarModel();
Definition(ebnf, grammarModel);
return grammarModel.ToGrammar();
}
public void GrammarModelToGrammarShouldCreateGrammar()
{
var grammarModel = new GrammarModel();
var S = new ProductionModel("S");
var A = new ProductionModel("A");
var B = new ProductionModel("B");
var a = new StringLiteralLexerRule("a");
var b = new StringLiteralLexerRule("b");
var space = new StringLiteralLexerRule(" ");
S.AddWithAnd(A.LeftHandSide);
S.AddWithAnd(B.LeftHandSide);
S.AddWithOr(B.LeftHandSide);
A.AddWithAnd(new LexerRuleModel(a));
B.AddWithAnd(new LexerRuleModel(b));
grammarModel.Productions.Add(S);
grammarModel.Productions.Add(A);
grammarModel.Productions.Add(B);
grammarModel.IgnoreRules.Add(new LexerRuleModel(space));
grammarModel.Start = S;
var grammar = grammarModel.ToGrammar();
Assert.AreEqual(4, grammar.Productions.Count);
Assert.AreEqual(1, grammar.Ignores.Count);
}
public void GrammarModelToGrammarShouldAddProductionWhenEmptyDefinition()
{
var S = new ProductionModel("S");
var grammarModel = new GrammarModel(S);
var grammar = grammarModel.ToGrammar();
Assert.AreEqual(1, grammar.Productions.Count);
}
public void GrammarModelShouldAddIgnoreLexerRuleModel()
{
var grammar = new GrammarModel();
grammar.IgnoreRules.Add(new LexerRuleModel { Value = new StringLiteralLexerRule("this is a literal")});
Assert.AreEqual(1, grammar.IgnoreRules.Count);
}
public void GrammarModelToGrammarShouldResolverProductionReferencesFromOtherGrammars()
{
var S = new ProductionModel { LeftHandSide = new NonTerminalModel(new FullyQualifiedName("ns1", "S")) };
var A = new ProductionModel { LeftHandSide = new NonTerminalModel(new FullyQualifiedName("ns1", "A")) };
S.Alterations.Add(
new AlterationModel(
new[] { A }));
A.Alterations.Add(
new AlterationModel(
new[] { new LexerRuleModel(
new StringLiteralLexerRule("a"))})
);
var ns1GrammarModel = new GrammarModel
{
Start = S
};
ns1GrammarModel.Productions.Add(S);
ns1GrammarModel.Productions.Add(A);
var ns1ProductionReferece = new ProductionReferenceModel(ns1GrammarModel.ToGrammar());
var Z = new ProductionModel { LeftHandSide = new NonTerminalModel(new FullyQualifiedName("ns2", "Z")) };
var X = new ProductionModel { LeftHandSide = new NonTerminalModel(new FullyQualifiedName("ns2", "X")) };
X.Alterations.Add(
new AlterationModel(
new SymbolModel[]
{
Z, ns1ProductionReferece
}));
var ns2GrammarModel = new GrammarModel
{
Start = Z
};
ns2GrammarModel.Productions.Add(Z);
ns2GrammarModel.Productions.Add(X);
var ns2Grammar = ns2GrammarModel.ToGrammar();
Assert.AreEqual(4, ns2Grammar.Productions.Count);
}