public void TestToStringStartStop2() /*throws Exception*/
{
Grammar g = new Grammar(
"lexer grammar t;\n" +
"ID : 'a'..'z'+;\n" +
"INT : '0'..'9'+;\n" +
"SEMI : ';';\n" +
"ASSIGN : '=';\n" +
"PLUS : '+';\n" +
"MULT : '*';\n" +
"WS : ' '+;\n");
// Tokens: 012345678901234567
// Input: x = 3 * 0 + 2 * 0;
ICharStream input = new ANTLRStringStream("x = 3 * 0 + 2 * 0;");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.Fill();
string result = tokens.ToOriginalString();
string expecting = "x = 3 * 0 + 2 * 0;";
Assert.AreEqual(expecting, result);
tokens.Replace(4, 8, "0"); // replace 3 * 0 with 0
result = tokens.ToString();
expecting = "x = 0 + 2 * 0;";
Assert.AreEqual(expecting, result);
result = tokens.ToString(0, 17);
expecting = "x = 0 + 2 * 0;";
Assert.AreEqual(expecting, result);
result = tokens.ToString(4, 8);
expecting = "0";
Assert.AreEqual(expecting, result);
result = tokens.ToString(0, 8);
expecting = "x = 0";
Assert.AreEqual(expecting, result);
result = tokens.ToString(12, 16);
expecting = "2 * 0";
Assert.AreEqual(expecting, result);
tokens.InsertAfter(17, "// comment");
result = tokens.ToString(12, 18);
expecting = "2 * 0;// comment";
Assert.AreEqual(expecting, result);
result = tokens.ToString(0, 8); // try again after insert at end
expecting = "x = 0";
Assert.AreEqual(expecting, result);
}
public void TestInsertAfterLastIndex() /*throws Exception*/
{
Grammar g = new Grammar(
"lexer grammar t;\n" +
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
ICharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.InsertAfter(2, "x");
string result = tokens.ToString();
string expecting = "abcx";
Assert.AreEqual(expecting, result);
}
public void Test2InsertBeforeAfterMiddleIndex()
{
Grammar g = new Grammar(
"lexer grammar t;\n" +
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n" );
ICharStream input = new ANTLRStringStream( "abc" );
Interpreter lexEngine = new Interpreter( g, input );
TokenRewriteStream tokens = new TokenRewriteStream( lexEngine );
tokens.Fill();
tokens.InsertBefore( 1, "x" );
tokens.InsertAfter( 1, "x" );
string result = tokens.ToString();
string expecting = "axbxc";
Assert.AreEqual( expecting, result );
}
public void TestReplaceRangeThenInsertAfterRightEdge() /*throws Exception*/
{
Grammar g = new Grammar(
"lexer grammar t;\n" +
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
ICharStream input = new ANTLRStringStream("abcccba");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.Fill();
tokens.Replace(2, 4, "x");
tokens.InsertAfter(4, "y");
string result = tokens.ToString();
string expecting = "abxyba";
Assert.AreEqual(expecting, result);
}
public void Test2InsertBeforeAfterMiddleIndex() /*throws Exception*/
{
Grammar g = new Grammar(
"lexer grammar t;\n" +
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
ICharStream input = new ANTLRStringStream("abc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.Fill();
tokens.InsertBefore(1, "x");
tokens.InsertAfter(1, "x");
string result = tokens.ToString();
string expecting = "axbxc";
assertEquals(expecting, result);
}
public void TestToStringStartStop2()
{
Grammar g = new Grammar(
"lexer grammar t;\n" +
"ID : 'a'..'z'+;\n" +
"INT : '0'..'9'+;\n" +
"SEMI : ';';\n" +
"ASSIGN : '=';\n" +
"PLUS : '+';\n" +
"MULT : '*';\n" +
"WS : ' '+;\n" );
// Tokens: 012345678901234567
// Input: x = 3 * 0 + 2 * 0;
ICharStream input = new ANTLRStringStream( "x = 3 * 0 + 2 * 0;" );
Interpreter lexEngine = new Interpreter( g, input );
TokenRewriteStream tokens = new TokenRewriteStream( lexEngine );
tokens.Fill();
string result = tokens.ToOriginalString();
string expecting = "x = 3 * 0 + 2 * 0;";
Assert.AreEqual( expecting, result );
tokens.Replace( 4, 8, "0" ); // replace 3 * 0 with 0
result = tokens.ToString();
expecting = "x = 0 + 2 * 0;";
Assert.AreEqual( expecting, result );
result = tokens.ToString( 0, 17 );
expecting = "x = 0 + 2 * 0;";
Assert.AreEqual( expecting, result );
result = tokens.ToString( 4, 8 );
expecting = "0";
Assert.AreEqual( expecting, result );
result = tokens.ToString( 0, 8 );
expecting = "x = 0";
Assert.AreEqual( expecting, result );
result = tokens.ToString( 12, 16 );
expecting = "2 * 0";
Assert.AreEqual( expecting, result );
tokens.InsertAfter( 17, "// comment" );
result = tokens.ToString( 12, 18 );
expecting = "2 * 0;// comment";
Assert.AreEqual( expecting, result );
result = tokens.ToString( 0, 8 ); // try again after insert at end
expecting = "x = 0";
Assert.AreEqual( expecting, result );
}
public void TestReplaceThenInsertAfterLastIndex()
{
Grammar g = new Grammar(
"lexer grammar t;\n" +
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n" );
ICharStream input = new ANTLRStringStream( "abc" );
Interpreter lexEngine = new Interpreter( g, input );
TokenRewriteStream tokens = new TokenRewriteStream( lexEngine );
tokens.Fill();
tokens.Replace( 2, "x" );
tokens.InsertAfter( 2, "y" );
string result = tokens.ToString();
string expecting = "abxy";
Assert.AreEqual( expecting, result );
}
public void TestReplaceRangeThenInsertAfterRightEdge()
{
Grammar g = new Grammar(
"lexer grammar t;\n" +
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n" );
ICharStream input = new ANTLRStringStream( "abcccba" );
Interpreter lexEngine = new Interpreter( g, input );
TokenRewriteStream tokens = new TokenRewriteStream( lexEngine );
tokens.Fill();
tokens.Replace( 2, 4, "x" );
tokens.InsertAfter( 4, "y" );
string result = tokens.ToString();
string expecting = "abxyba";
assertEquals( expecting, result );
}
