public void TestMismatchedSetError()
{
Grammar pg = new Grammar(
"parser grammar p;\n" +
"prog : WHILE ID LCURLY (assign)* RCURLY;\n" +
"assign : ID ASSIGN expr SEMI ;\n" +
"expr : INT | FLOAT | ID ;\n");
Grammar g = new Grammar();
g.ImportTokenVocabulary(pg);
g.FileName = "<string>";
g.SetGrammarContent(
"lexer grammar t;\n" +
"WHILE : 'while';\n" +
"LCURLY : '{';\n" +
"RCURLY : '}';\n" +
"ASSIGN : '=';\n" +
"SEMI : ';';\n" +
"ID : ('a'..'z')+ ;\n" +
"INT : (DIGIT)+ ;\n" +
"FLOAT : (DIGIT)+ '.' (DIGIT)* ;\n" +
"fragment DIGIT : '0'..'9';\n" +
"WS : (' ')+ ;\n");
ICharStream input = new ANTLRStringStream("while x { i=; y=3.42; z=y; }");
Interpreter lexEngine = new Interpreter(g, input);
FilteringTokenStream tokens = new FilteringTokenStream(lexEngine);
tokens.SetTokenTypeChannel(g.GetTokenType("WS"), 99);
//System.out.println("tokens="+tokens.toString());
Interpreter parseEngine = new Interpreter(pg, tokens);
ParseTree t = parseEngine.Parse("prog");
string result = t.ToStringTree();
string expecting =
"(<grammar p> (prog while x { (assign i = (expr MismatchedSetException(10!={5,6,7})))))";
Assert.AreEqual(expecting, result);
}
public void TestMismatchedTokenError()
{
Assert.Inconclusive("May be failing on just my port...");
Grammar pg = new Grammar(
"parser grammar p;\n" +
"prog : WHILE ID LCURLY (assign)* RCURLY;\n" +
"assign : ID ASSIGN expr SEMI ;\n" +
"expr : INT | FLOAT | ID ;\n");
Grammar g = new Grammar();
g.FileName = Grammar.IGNORE_STRING_IN_GRAMMAR_FILE_NAME + "string";
g.ImportTokenVocabulary(pg);
g.SetGrammarContent(
"lexer grammar t;\n" +
"WHILE : 'while';\n" +
"LCURLY : '{';\n" +
"RCURLY : '}';\n" +
"ASSIGN : '=';\n" +
"SEMI : ';';\n" +
"ID : ('a'..'z')+ ;\n" +
"INT : (DIGIT)+ ;\n" +
"FLOAT : (DIGIT)+ '.' (DIGIT)* ;\n" +
"fragment DIGIT : '0'..'9';\n" +
"WS : (' ')+ ;\n");
ICharStream input = new ANTLRStringStream("while x { i=1 y=3.42; z=y; }");
Interpreter lexEngine = new Interpreter(g, input);
FilteringTokenStream tokens = new FilteringTokenStream(lexEngine);
tokens.SetTokenTypeChannel(g.GetTokenType("WS"), 99);
//System.out.println("tokens="+tokens.toString());
Interpreter parseEngine = new Interpreter(pg, tokens);
ParseTree t = parseEngine.Parse("prog");
string result = t.ToStringTree();
string expecting =
"(<grammar p> (prog while x { (assign i = (expr 1) MismatchedTokenException(5!=9))))";
assertEquals(expecting, result);
}
public void TestNoViableAltError()
{
Grammar pg = new Grammar(
"parser grammar p;\n" +
"prog : WHILE ID LCURLY (assign)* RCURLY;\n" +
"assign : ID ASSIGN expr SEMI ;\n" +
"expr : {;}INT | FLOAT | ID ;\n");
Grammar g = new Grammar();
g.ImportTokenVocabulary(pg);
g.FileName = "<string>";
g.SetGrammarContent(
"lexer grammar t;\n" +
"WHILE : 'while';\n" +
"LCURLY : '{';\n" +
"RCURLY : '}';\n" +
"ASSIGN : '=';\n" +
"SEMI : ';';\n" +
"ID : ('a'..'z')+ ;\n" +
"INT : (DIGIT)+ ;\n" +
"FLOAT : (DIGIT)+ '.' (DIGIT)* ;\n" +
"fragment DIGIT : '0'..'9';\n" +
"WS : (' ')+ ;\n");
ICharStream input = new ANTLRStringStream("while x { i=; y=3.42; z=y; }");
Interpreter lexEngine = new Interpreter(g, input);
FilteringTokenStream tokens = new FilteringTokenStream(lexEngine);
tokens.SetTokenTypeChannel(g.GetTokenType("WS"), 99);
//System.out.println("tokens="+tokens.toString());
Interpreter parseEngine = new Interpreter(pg, tokens);
ParseTree t = parseEngine.Parse("prog");
string result = t.ToStringTree();
string expecting =
"(<grammar p> (prog while x { (assign i = (expr NoViableAltException(10@[4:1: expr : ( INT | FLOAT | ID );])))))";
Assert.AreEqual(expecting, result);
}
public void TestSimpleParse()
{
Grammar pg = new Grammar(
"parser grammar p;\n" +
"prog : WHILE ID LCURLY (assign)* RCURLY EOF;\n" +
"assign : ID ASSIGN expr SEMI ;\n" +
"expr : INT | FLOAT | ID ;\n");
Grammar g = new Grammar();
g.ImportTokenVocabulary(pg);
g.FileName = Grammar.IGNORE_STRING_IN_GRAMMAR_FILE_NAME + "string";
g.SetGrammarContent(
"lexer grammar t;\n" +
"WHILE : 'while';\n" +
"LCURLY : '{';\n" +
"RCURLY : '}';\n" +
"ASSIGN : '=';\n" +
"SEMI : ';';\n" +
"ID : ('a'..'z')+ ;\n" +
"INT : (DIGIT)+ ;\n" +
"FLOAT : (DIGIT)+ '.' (DIGIT)* ;\n" +
"fragment DIGIT : '0'..'9';\n" +
"WS : (' ')+ ;\n");
ICharStream input = new ANTLRStringStream("while x { i=1; y=3.42; z=y; }");
Interpreter lexEngine = new Interpreter(g, input);
FilteringTokenStream tokens = new FilteringTokenStream(lexEngine);
tokens.SetTokenTypeChannel(g.GetTokenType("WS"), 99);
//System.out.println("tokens="+tokens.toString());
Interpreter parseEngine = new Interpreter(pg, tokens);
ParseTree t = parseEngine.Parse("prog");
string result = t.ToStringTree();
string expecting =
"(<grammar p> (prog while x { (assign i = (expr 1) ;) (assign y = (expr 3.42) ;) (assign z = (expr y) ;) } <EOF>))";
Assert.AreEqual(expecting, result);
}