Examples with TokenStreamRewriter org.antlr.v4.runtime.TokenStreamRewriter used on opensource projects

Example 11 with TokenStreamRewriter

use of org.antlr.v4.runtime.TokenStreamRewriter in project antlr4 by antlr.

the class TestTokenStreamRewriter method testLeaveAloneDisjointInsert.

@Test
public void testLeaveAloneDisjointInsert() throws Exception {
    LexerGrammar g = new LexerGrammar("lexer grammar T;\n" + "A : 'a';\n" + "B : 'b';\n" + "C : 'c';\n");
    String input = "abcc";
    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream(input));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.insertBefore(1, "x");
    tokens.replace(2, 3, "foo");
    String result = tokens.getText();
    String expecting = "axbfoo";
    assertEquals(expecting, result);
}

Example 12 with TokenStreamRewriter

use of org.antlr.v4.runtime.TokenStreamRewriter in project antlr4 by antlr.

the class TestTokenStreamRewriter method testPreservesOrderOfContiguousInserts.

// Test Fix for https://github.com/antlr/antlr4/issues/550
@Test
public void testPreservesOrderOfContiguousInserts() throws Exception {
    LexerGrammar g = new LexerGrammar("lexer grammar T;\n" + "A : 'a';\n" + "B : 'b';\n" + "C : 'c';\n");
    String input = "ab";
    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream(input));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.insertBefore(0, "<p>");
    tokens.insertBefore(0, "<b>");
    tokens.insertBefore(0, "<div>");
    tokens.insertAfter(0, "</p>");
    tokens.insertAfter(0, "</b>");
    tokens.insertAfter(0, "</div>");
    tokens.insertBefore(1, "!");
    String result = tokens.getText();
    String expecting = "<div><b><p>a</p></b></div>!b";
    assertEquals(expecting, result);
}

Example 13 with TokenStreamRewriter

use of org.antlr.v4.runtime.TokenStreamRewriter in project antlr4 by antlr.

the class TestTokenStreamRewriter method testDisjointInserts.

@Test
public void testDisjointInserts() throws Exception {
    LexerGrammar g = new LexerGrammar("lexer grammar T;\n" + "A : 'a';\n" + "B : 'b';\n" + "C : 'c';\n");
    String input = "abc";
    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream(input));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.insertBefore(1, "x");
    tokens.insertBefore(2, "y");
    tokens.insertBefore(0, "z");
    String result = tokens.getText();
    String expecting = "zaxbyc";
    assertEquals(expecting, result);
}

Example 14 with TokenStreamRewriter

use of org.antlr.v4.runtime.TokenStreamRewriter in project antlr4 by antlr.

the class TestTokenStreamRewriter method testReplaceSubsetThenFetch.

@Test
public void testReplaceSubsetThenFetch() throws Exception {
    LexerGrammar g = new LexerGrammar("lexer grammar T;\n" + "A : 'a';\n" + "B : 'b';\n" + "C : 'c';\n");
    String input = "abcccba";
    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream(input));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.replace(2, 4, "xyz");
    String result = tokens.getText(Interval.of(0, 6));
    String expecting = "abxyzba";
    assertEquals(expecting, result);
}

Example 15 with TokenStreamRewriter

use of org.antlr.v4.runtime.TokenStreamRewriter in project antlr4 by antlr.

the class TestTokenStreamRewriter method testReplaceSingleMiddleThenOverlappingSuperset.

@Test
public void testReplaceSingleMiddleThenOverlappingSuperset() throws Exception {
    LexerGrammar g = new LexerGrammar("lexer grammar T;\n" + "A : 'a';\n" + "B : 'b';\n" + "C : 'c';\n");
    String input = "abcba";
    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream(input));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.replace(2, 2, "xyz");
    tokens.replace(0, 3, "foo");
    String result = tokens.getText();
    String expecting = "fooa";
    assertEquals(expecting, result);
}