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

Example 21 with ANTLRInputStream

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

the class TestTokenStreamRewriter method testReplaceRangeThenInsertAtRightEdge.

@Test
public void testReplaceRangeThenInsertAtRightEdge() 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, "x");
    tokens.insertBefore(4, "y");
    // no effect; within range of a replace
    stream.fill();
    Exception exc = null;
    try {
        tokens.getText();
    } catch (IllegalArgumentException iae) {
        exc = iae;
    }
    String expecting = "insert op <InsertBeforeOp@[@4,4:4='c',<3>,1:4]:\"y\"> within boundaries of previous <ReplaceOp@[@2,2:2='c',<3>,1:2]..[@4,4:4='c',<3>,1:4]:\"x\">";
    assertNotNull(exc);
    assertEquals(expecting, exc.getMessage());
}

Example 22 with ANTLRInputStream

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

the class TestTokenStreamRewriter method testReplaceMiddleIndex.

@Test
public void testReplaceMiddleIndex() 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.replace(1, "x");
    String result = tokens.getText();
    String expecting = "axc";
    assertEquals(expecting, result);
}

Example 23 with ANTLRInputStream

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

the class TestTokenStreamRewriter method testDropPrevCoveredInsert.

@Test
public void testDropPrevCoveredInsert() 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, "foo");
    tokens.replace(1, 2, "foo");
    stream.fill();
    // kill prev insert
    String result = tokens.getText();
    String expecting = "afoofoo";
    assertEquals(expecting, result);
}

Example 24 with ANTLRInputStream

use of org.antlr.v4.runtime.ANTLRInputStream 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 25 with ANTLRInputStream

use of org.antlr.v4.runtime.ANTLRInputStream 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);
}