public void TestReplaceRangeThenInsertAtRightEdge() /*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.InsertBefore(4, "y"); // no effect; within range of a replace
Exception exc = null;
try
{
tokens.ToString();
}
catch (ArgumentException iae)
{
exc = iae;
}
string expecting = "insert op <InsertBeforeOp@[@4,4:4='c',<6>,1:4]:\"y\"> within boundaries of previous <ReplaceOp@[@2,2:2='c',<6>,1:2]..[@4,4:4='c',<6>,1:4]:\"x\">";
Assert.IsNotNull(exc);
Assert.AreEqual(expecting, exc.Message);
}
public void TestInsertInPriorReplace() /*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.Replace(0, 2, "x");
tokens.InsertBefore(1, "0");
Exception exc = null;
try
{
tokens.ToString();
}
catch (ArgumentException iae)
{
exc = iae;
}
string expecting = "insert op <InsertBeforeOp@[@1,1:1='b',<5>,1:1]:\"0\"> within boundaries of previous <ReplaceOp@[@0,0:0='a',<4>,1:0]..[@2,2:2='c',<6>,1:2]:\"x\">";
Assert.IsNotNull(exc);
Assert.AreEqual(expecting, exc.Message);
}
public void TestReplaceThenReplaceLowerIndexedSuperset() /*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, "xyz");
tokens.Replace(1, 3, "foo"); // overlap, error
Exception exc = null;
try
{
tokens.ToString();
}
catch (ArgumentException iae)
{
exc = iae;
}
string expecting = "replace op boundaries of <ReplaceOp@[@1,1:1='b',<5>,1:1]..[@3,3:3='c',<6>,1:3]:\"foo\"> overlap with previous <ReplaceOp@[@2,2:2='c',<6>,1:2]..[@4,4:4='c',<6>,1:4]:\"xyz\">";
Assert.IsNotNull(exc);
Assert.AreEqual(expecting, exc.Message);
}
public void TestOverlappingReplace2() /*throws Exception*/
{
Grammar g = new Grammar(
"lexer grammar t;\n" +
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
ICharStream input = new ANTLRStringStream("abcc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.Fill();
tokens.Replace(0, 3, "bar");
tokens.Replace(1, 2, "foo"); // cannot split earlier replace
Exception exc = null;
try
{
tokens.ToString();
}
catch (ArgumentException iae)
{
exc = iae;
}
string expecting = "replace op boundaries of <ReplaceOp@[@1,1:1='b',<5>,1:1]..[@2,2:2='c',<6>,1:2]:\"foo\"> overlap with previous <ReplaceOp@[@0,0:0='a',<4>,1:0]..[@3,3:3='c',<6>,1:3]:\"bar\">";
Assert.IsNotNull(exc);
Assert.AreEqual(expecting, exc.Message);
}
private static void KillTrailingNewline(TokenRewriteStream tokens, int index)
{
IList <IToken> all = tokens.GetTokens();
IToken tok = all[index];
IToken after = all[index + 1];
string ws = after.Text;
if (ws.StartsWith("\n"))
{
//Console.Out.WriteLine( "killing WS after action" );
if (ws.Length > 1)
{
int space = ws.IndexOf(' ');
int tab = ws.IndexOf('\t');
if (ws.StartsWith("\n") && space >= 0 || tab >= 0)
{
return; // do nothing if \n + indent
}
// otherwise kill all \n
ws = ws.Replace("\n", "");
tokens.Replace(after.TokenIndex, ws);
}
else
{
tokens.Delete(after.TokenIndex);
}
}
}
public virtual void ParseAndRewrite()
{
ProcessArgs(args);
ICharStream input = null;
if (filename != null)
{
input = new ANTLRFileStream(filename);
}
else
{
input = new ANTLRReaderStream(Console.In, ANTLRReaderStream.InitialBufferSize, ANTLRReaderStream.ReadBufferSize);
}
// BUILD AST
ANTLRLexer lex = new ANTLRLexer(input);
tokens = new TokenRewriteStream(lex);
ANTLRParser g = new ANTLRParser(tokens);
Grammar grammar = new Grammar();
var r = g.grammar_(grammar);
CommonTree t = (CommonTree)r.Tree;
if (tree_option)
{
Console.Out.WriteLine(t.ToStringTree());
}
Rewrite(g.TreeAdaptor, t, g.TokenNames);
}
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 Test2InsertMiddleIndex()
{
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.InsertBefore( 1, "y" );
string result = tokens.ToString();
string expecting = "ayxbc";
Assert.AreEqual( expecting, result );
}
public void TestInsertBeforeIndex0() /*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.InsertBefore(0, "0");
string result = tokens.ToString();
string expecting = "0abc";
assertEquals(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 TestReplaceSubsetThenFetch() /*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, "xyz");
string result = tokens.ToString(0, 6);
string expecting = "abxyzba";
Assert.AreEqual(expecting, result);
}
public void TestReplaceAll() /*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(0, 6, "x");
string result = tokens.ToString();
string expecting = "x";
assertEquals(expecting, result);
}
public void TestReplaceThenDeleteMiddleIndex() /*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.Replace(1, "x");
tokens.Delete(1);
string result = tokens.ToString();
string expecting = "ac";
Assert.AreEqual(expecting, result);
}
public void TestInsertThenReplaceSameIndex() /*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(0, "0");
tokens.Replace(0, "x"); // supercedes insert at 0
string result = tokens.ToString();
string expecting = "0xbc";
Assert.AreEqual(expecting, result);
}
public void TestReplaceRangeThenInsertAtLeftEdge() /*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.InsertBefore(2, "y");
string result = tokens.ToString();
string expecting = "abyxba";
Assert.AreEqual(expecting, result);
}
public void TestReplaceSingleMiddleThenOverlappingSuperset() /*throws Exception*/
{
Grammar g = new Grammar(
"lexer grammar t;\n" +
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
ICharStream input = new ANTLRStringStream("abcba");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.Fill();
tokens.Replace(2, 2, "xyz");
tokens.Replace(0, 3, "foo");
string result = tokens.ToString();
string expecting = "fooa";
Assert.AreEqual(expecting, result);
}
public void TestCombineInsertOnLeftWithDelete() /*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.Delete(0, 2);
tokens.InsertBefore(0, "z"); // combine with left edge of rewrite
string result = tokens.ToString();
string expecting = "z"; // make sure combo is not znull
Assert.AreEqual(expecting, result);
}
public void TestOverlappingReplace4() /*throws Exception*/
{
Grammar g = new Grammar(
"lexer grammar t;\n" +
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
ICharStream input = new ANTLRStringStream("abcc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.Fill();
tokens.Replace(1, 2, "foo");
tokens.Replace(1, 3, "bar"); // wipes prior nested replace
string result = tokens.ToString();
string expecting = "abar";
Assert.AreEqual(expecting, result);
}
public void TestDropIdenticalReplace() /*throws Exception*/
{
Grammar g = new Grammar(
"lexer grammar t;\n" +
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
ICharStream input = new ANTLRStringStream("abcc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.Fill();
tokens.Replace(1, 2, "foo");
tokens.Replace(1, 2, "foo"); // drop previous, identical
string result = tokens.ToString();
string expecting = "afooc";
Assert.AreEqual(expecting, result);
}
public void TestDropPrevCoveredInsert() /*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, "foo");
tokens.Replace(1, 2, "foo"); // kill prev insert
string result = tokens.ToString();
string expecting = "afoofoo";
Assert.AreEqual(expecting, result);
}
public void TestLeaveAloneDisjointInsert2() /*throws Exception*/
{
Grammar g = new Grammar(
"lexer grammar t;\n" +
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n");
ICharStream input = new ANTLRStringStream("abcc");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.Fill();
tokens.Replace(2, 3, "foo");
tokens.InsertBefore(1, "x");
string result = tokens.ToString();
string expecting = "axbfoo";
Assert.AreEqual(expecting, result);
}
public void TestInsertBeforeTokenThenDeleteThatToken()
{
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(2, "y");
tokens.Delete(2);
string result = tokens.ToString();
string expecting = "aby";
Assert.AreEqual(expecting, result);
}
public void TestCombineInsertOnLeftWithReplace() /*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.Replace(0, 2, "foo");
tokens.InsertBefore(0, "z"); // combine with left edge of rewrite
string result = tokens.ToString();
string expecting = "zfoo";
assertEquals(expecting, result);
}
public void TestCombine3Inserts() /*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.InsertBefore(0, "y");
tokens.InsertBefore(1, "z");
string result = tokens.ToString();
string expecting = "yazxbc";
Assert.AreEqual(expecting, result);
}
public void TestToStringStartStop() /*throws Exception*/
{
Grammar g = new Grammar(
"lexer grammar t;\n" +
"ID : 'a'..'z'+;\n" +
"INT : '0'..'9'+;\n" +
"SEMI : ';';\n" +
"MUL : '*';\n" +
"ASSIGN : '=';\n" +
"WS : ' '+;\n");
// Tokens: 0123456789
// Input: x = 3 * 0;
ICharStream input = new ANTLRStringStream("x = 3 * 0;");
Interpreter lexEngine = new Interpreter(g, input);
TokenRewriteStream tokens = new TokenRewriteStream(lexEngine);
tokens.Fill();
tokens.Replace(4, 8, "0"); // replace 3 * 0 with 0
string result = tokens.ToOriginalString();
string expecting = "x = 3 * 0;";
Assert.AreEqual(expecting, result);
result = tokens.ToString();
expecting = "x = 0;";
Assert.AreEqual(expecting, result);
result = tokens.ToString(0, 9);
expecting = "x = 0;";
Assert.AreEqual(expecting, result);
result = tokens.ToString(4, 8);
expecting = "0";
Assert.AreEqual(expecting, result);
}
public static void ACTION(TokenRewriteStream tokens, CommonTree t)
{
CommonTree parent = (CommonTree)t.Parent;
int ptype = parent.Type;
if (ptype == ANTLRParser.SCOPE || // we have special rules for these
ptype == ANTLRParser.AMPERSAND)
{
return;
}
//Console.Out.WriteLine( "ACTION: " + t.Text );
CommonTree root = (CommonTree)t.GetAncestor(ANTLRParser.RULE);
if (root != null)
{
CommonTree rule = (CommonTree)root.GetChild(0);
//Console.Out.WriteLine( "rule: " + rule );
if (!char.IsUpper(rule.Text[0]))
{
tokens.Delete(t.TokenStartIndex, t.TokenStopIndex);
KillTrailingNewline(tokens, t.token.TokenIndex);
}
}
}
public void TestInsertThenReplaceSameIndex()
{
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( 0, "0" );
tokens.Replace( 0, "x" ); // supercedes insert at 0
string result = tokens.ToString();
string expecting = "0xbc";
Assert.AreEqual( expecting, result );
}
public void TestLeaveAloneDisjointInsert2()
{
Grammar g = new Grammar(
"lexer grammar t;\n" +
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n" );
ICharStream input = new ANTLRStringStream( "abcc" );
Interpreter lexEngine = new Interpreter( g, input );
TokenRewriteStream tokens = new TokenRewriteStream( lexEngine );
tokens.Fill();
tokens.Replace( 2, 3, "foo" );
tokens.InsertBefore( 1, "x" );
string result = tokens.ToString();
string expecting = "axbfoo";
Assert.AreEqual( expecting, result );
}
public void TestReplaceThenReplaceSuperset()
{
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, "xyz" );
tokens.Replace( 3, 5, "foo" ); // overlaps, error
Exception exc = null;
try
{
tokens.ToString();
}
catch ( ArgumentException iae )
{
exc = iae;
}
string expecting = "replace op boundaries of <ReplaceOp@[@3,3:3='c',<6>,1:3]..[@5,5:5='b',<5>,1:5]:\"foo\"> overlap with previous <ReplaceOp@[@2,2:2='c',<6>,1:2]..[@4,4:4='c',<6>,1:4]:\"xyz\">";
Assert.IsNotNull( exc );
Assert.AreEqual( expecting, exc.Message );
}
private static void KillTrailingNewline( TokenRewriteStream tokens, int index )
{
IList<IToken> all = tokens.GetTokens();
IToken tok = all[index];
IToken after = all[index + 1];
string ws = after.Text;
if ( ws.StartsWith( "\n" ) )
{
//Console.Out.WriteLine( "killing WS after action" );
if ( ws.Length > 1 )
{
int space = ws.IndexOf( ' ' );
int tab = ws.IndexOf( '\t' );
if ( ws.StartsWith( "\n" ) && space >= 0 || tab >= 0 )
{
return; // do nothing if \n + indent
}
// otherwise kill all \n
ws = ws.Replace( "\n", "" );
tokens.Replace( after.TokenIndex, ws );
}
else
{
tokens.Delete( after.TokenIndex );
}
}
}
public static void ACTION( TokenRewriteStream tokens, CommonTree t )
{
CommonTree parent = (CommonTree)t.Parent;
int ptype = parent.Type;
if ( ptype == ANTLRParser.SCOPE || // we have special rules for these
ptype == ANTLRParser.AMPERSAND )
{
return;
}
//Console.Out.WriteLine( "ACTION: " + t.Text );
CommonTree root = (CommonTree)t.GetAncestor( ANTLRParser.RULE );
if ( root != null )
{
CommonTree rule = (CommonTree)root.GetChild( 0 );
//Console.Out.WriteLine( "rule: " + rule );
if ( Rule.GetRuleType( rule.Text ) == RuleType.Parser )
{
tokens.Delete( t.TokenStartIndex, t.TokenStopIndex );
KillTrailingNewline( tokens, t.Token.TokenIndex );
}
}
}
public void TestDropIdenticalReplace()
{
Grammar g = new Grammar(
"lexer grammar t;\n" +
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n" );
ICharStream input = new ANTLRStringStream( "abcc" );
Interpreter lexEngine = new Interpreter( g, input );
TokenRewriteStream tokens = new TokenRewriteStream( lexEngine );
tokens.Fill();
tokens.Replace( 1, 2, "foo" );
tokens.Replace( 1, 2, "foo" ); // drop previous, identical
string result = tokens.ToString();
string expecting = "afooc";
Assert.AreEqual( expecting, result );
}
public void TestInsertBeforeTokenThenDeleteThatToken()
{
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(2, "y");
tokens.Delete(2);
string result = tokens.ToString();
string expecting = "aby";
Assert.AreEqual(expecting, result);
}
public void TestReplaceSingleMiddleThenOverlappingSuperset()
{
Grammar g = new Grammar(
"lexer grammar t;\n" +
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n" );
ICharStream input = new ANTLRStringStream( "abcba" );
Interpreter lexEngine = new Interpreter( g, input );
TokenRewriteStream tokens = new TokenRewriteStream( lexEngine );
tokens.Fill();
tokens.Replace( 2, 2, "xyz" );
tokens.Replace( 0, 3, "foo" );
string result = tokens.ToString();
string expecting = "fooa";
Assert.AreEqual( expecting, result );
}
public void TestReplaceThenDeleteMiddleIndex()
{
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( 1, "x" );
tokens.Delete( 1 );
string result = tokens.ToString();
string expecting = "ac";
assertEquals( expecting, result );
}
public void TestReplaceSubsetThenFetch()
{
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, "xyz" );
string result = tokens.ToString( 0, 6 );
string expecting = "abxyzba";
Assert.AreEqual( expecting, result );
}
public void TestReplaceThenReplaceSuperset()
{
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, "xyz" );
tokens.Replace( 3, 5, "foo" ); // overlaps, error
Exception exc = null;
try
{
tokens.ToString();
}
catch ( ArgumentException iae )
{
exc = iae;
}
string expecting = "replace op boundaries of <[email protected]:\"foo\"> overlap with previous <[email protected]:\"xyz\">";
assertNotNull( exc );
assertEquals( expecting, exc.Message );
}
public virtual void ParseAndRewrite()
{
ProcessArgs( args );
ICharStream input = null;
if ( filename != null )
{
input = new ANTLRFileStream( filename );
}
else
{
input = new ANTLRReaderStream( Console.In, ANTLRReaderStream.InitialBufferSize, ANTLRReaderStream.ReadBufferSize );
}
// BUILD AST
ANTLRLexer lex = new ANTLRLexer( input );
tokens = new TokenRewriteStream( lex );
ANTLRParser g = new ANTLRParser( tokens );
Grammar grammar = new Grammar();
var r = g.grammar_( grammar );
CommonTree t = (CommonTree)r.Tree;
if ( tree_option )
Console.Out.WriteLine( t.ToStringTree() );
Rewrite( g.TreeAdaptor, t, g.TokenNames );
}
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 TestToStringStartStop()
{
Grammar g = new Grammar(
"lexer grammar t;\n" +
"ID : 'a'..'z'+;\n" +
"INT : '0'..'9'+;\n" +
"SEMI : ';';\n" +
"MUL : '*';\n" +
"ASSIGN : '=';\n" +
"WS : ' '+;\n" );
// Tokens: 0123456789
// Input: x = 3 * 0;
ICharStream input = new ANTLRStringStream( "x = 3 * 0;" );
Interpreter lexEngine = new Interpreter( g, input );
TokenRewriteStream tokens = new TokenRewriteStream( lexEngine );
tokens.Fill();
tokens.Replace( 4, 8, "0" ); // replace 3 * 0 with 0
string result = tokens.ToOriginalString();
string expecting = "x = 3 * 0;";
Assert.AreEqual( expecting, result );
result = tokens.ToString();
expecting = "x = 0;";
Assert.AreEqual( expecting, result );
result = tokens.ToString( 0, 9 );
expecting = "x = 0;";
Assert.AreEqual( expecting, result );
result = tokens.ToString( 4, 8 );
expecting = "0";
Assert.AreEqual( expecting, result );
}
public void TestInsertInPriorReplace()
{
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( 0, 2, "x" );
tokens.InsertBefore( 1, "0" );
Exception exc = null;
try
{
tokens.ToString();
}
catch ( ArgumentException iae )
{
exc = iae;
}
string expecting = "insert op <InsertBeforeOp@[@1,1:1='b',<5>,1:1]:\"0\"> within boundaries of previous <ReplaceOp@[@0,0:0='a',<4>,1:0]..[@2,2:2='c',<6>,1:2]:\"x\">";
Assert.IsNotNull( exc );
Assert.AreEqual( expecting, exc.Message );
}
public void TestCombineInsertOnLeftWithDelete()
{
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.Delete( 0, 2 );
tokens.InsertBefore( 0, "z" ); // combine with left edge of rewrite
string result = tokens.ToString();
string expecting = "z"; // make sure combo is not znull
assertEquals( expecting, result );
}
public void TestReplaceRangeThenInsertAtRightEdge()
{
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.InsertBefore( 4, "y" ); // no effect; within range of a replace
Exception exc = null;
try
{
tokens.ToString();
}
catch ( ArgumentException iae )
{
exc = iae;
}
string expecting = "insert op <InsertBeforeOp@[@4,4:4='c',<6>,1:4]:\"y\"> within boundaries of previous <ReplaceOp@[@2,2:2='c',<6>,1:2]..[@4,4:4='c',<6>,1:4]:\"x\">";
Assert.IsNotNull( exc );
Assert.AreEqual( expecting, exc.Message );
}
public void TestDropPrevCoveredInsert()
{
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, "foo" );
tokens.Replace( 1, 2, "foo" ); // kill prev insert
string result = tokens.ToString();
string expecting = "afoofoo";
Assert.AreEqual( expecting, result );
}
public void TestReplaceRangeThenInsertAtLeftEdge()
{
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.InsertBefore( 2, "y" );
string result = tokens.ToString();
string expecting = "abyxba";
assertEquals( expecting, result );
}
public void TestCombineInsertOnLeftWithReplace()
{
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( 0, 2, "foo" );
tokens.InsertBefore( 0, "z" ); // combine with left edge of rewrite
string result = tokens.ToString();
string expecting = "zfoo";
Assert.AreEqual( expecting, result );
}
public void TestOverlappingReplace4()
{
Grammar g = new Grammar(
"lexer grammar t;\n" +
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n" );
ICharStream input = new ANTLRStringStream( "abcc" );
Interpreter lexEngine = new Interpreter( g, input );
TokenRewriteStream tokens = new TokenRewriteStream( lexEngine );
tokens.Fill();
tokens.Replace( 1, 2, "foo" );
tokens.Replace( 1, 3, "bar" ); // wipes prior nested replace
string result = tokens.ToString();
string expecting = "abar";
Assert.AreEqual( expecting, result );
}
public void TestOverlappingReplace2()
{
Grammar g = new Grammar(
"lexer grammar t;\n" +
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n" );
ICharStream input = new ANTLRStringStream( "abcc" );
Interpreter lexEngine = new Interpreter( g, input );
TokenRewriteStream tokens = new TokenRewriteStream( lexEngine );
tokens.Fill();
tokens.Replace( 0, 3, "bar" );
tokens.Replace( 1, 2, "foo" ); // cannot split earlier replace
Exception exc = null;
try
{
tokens.ToString();
}
catch ( ArgumentException iae )
{
exc = iae;
}
string expecting = "replace op boundaries of <[email protected]:\"foo\"> overlap with previous <[email protected]:\"bar\">";
assertNotNull( exc );
assertEquals( expecting, exc.Message );
}
public void TestOverlappingReplace2()
{
Grammar g = new Grammar(
"lexer grammar t;\n" +
"A : 'a';\n" +
"B : 'b';\n" +
"C : 'c';\n" );
ICharStream input = new ANTLRStringStream( "abcc" );
Interpreter lexEngine = new Interpreter( g, input );
TokenRewriteStream tokens = new TokenRewriteStream( lexEngine );
tokens.Fill();
tokens.Replace( 0, 3, "bar" );
tokens.Replace( 1, 2, "foo" ); // cannot split earlier replace
Exception exc = null;
try
{
tokens.ToString();
}
catch ( ArgumentException iae )
{
exc = iae;
}
string expecting = "replace op boundaries of <ReplaceOp@[@1,1:1='b',<5>,1:1]..[@2,2:2='c',<6>,1:2]:\"foo\"> overlap with previous <ReplaceOp@[@0,0:0='a',<4>,1:0]..[@3,3:3='c',<6>,1:3]:\"bar\">";
Assert.IsNotNull( exc );
Assert.AreEqual( expecting, exc.Message );
}
public void Test2InsertThenReplaceIndex0()
{
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( 0, "x" );
tokens.InsertBefore( 0, "y" );
tokens.Replace( 0, "z" );
string result = tokens.ToString();
string expecting = "zbc";
assertEquals( 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 );
}