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

Example 81 with ANTLRInputStream

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

the class TestTokenStreamRewriter method test2InsertBeforeAfterMiddleIndex.

@Test
public void test2InsertBeforeAfterMiddleIndex() 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.insertAfter(1, "x");
    String result = tokens.getText();
    String expecting = "axbxc";
    assertEquals(expecting, result);
}

Example 82 with ANTLRInputStream

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

the class TestTokenStreamRewriter method testInsertAfterLastIndex.

@Test
public void testInsertAfterLastIndex() 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.insertAfter(2, "x");
    String result = tokens.getText();
    String expecting = "abcx";
    assertEquals(expecting, result);
}

Example 83 with ANTLRInputStream

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

the class TestTokenStreamRewriter method test2InsertMiddleIndex.

@Test
public void test2InsertMiddleIndex() 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(1, "y");
    String result = tokens.getText();
    String expecting = "ayxbc";
    assertEquals(expecting, result);
}

Example 84 with ANTLRInputStream

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

the class TestTokenStreamRewriter method testReplaceLastIndex.

@Test
public void testReplaceLastIndex() 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(2, "x");
    String result = tokens.getText();
    String expecting = "abx";
    assertEquals(expecting, result);
}

Example 85 with ANTLRInputStream

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

the class TestTokenStreamRewriter method testInsertBeforeIndex0.

@Test
public void testInsertBeforeIndex0() throws Exception {
    LexerGrammar g = new LexerGrammar("lexer grammar T;\n" + "A : 'a';\n" + "B : 'b';\n" + "C : 'c';\n");
    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream("abc"));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.insertBefore(0, "0");
    String result = tokens.getText();
    String expecting = "0abc";
    assertEquals(expecting, result);
}