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

Example 86 with ANTLRInputStream

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

the class TestTokenStreamRewriter method testOverlappingReplace2.

@Test
public void testOverlappingReplace2() 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.replace(0, 3, "bar");
    tokens.replace(1, 2, "foo");
    stream.fill();
    // cannot split earlier replace
    Exception exc = null;
    try {
        tokens.getText();
    } catch (IllegalArgumentException iae) {
        exc = iae;
    }
    String expecting = "replace op boundaries of <ReplaceOp@[@1,1:1='b',<2>,1:1]..[@2,2:2='c',<3>,1:2]:\"foo\"> overlap with previous <ReplaceOp@[@0,0:0='a',<1>,1:0]..[@3,3:3='c',<3>,1:3]:\"bar\">";
    assertNotNull(exc);
    assertEquals(expecting, exc.getMessage());
}

Example 87 with ANTLRInputStream

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

the class TestTokenStreamRewriter method test2InsertThenReplaceIndex0.

@Test
public void test2InsertThenReplaceIndex0() 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(0, "x");
    tokens.insertBefore(0, "y");
    tokens.replace(0, "z");
    String result = tokens.getText();
    String expecting = "yxzbc";
    assertEquals(expecting, result);
}

Example 88 with ANTLRInputStream

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

the class TestTokenStreamRewriter method testOverlappingReplace4.

@Test
public void testOverlappingReplace4() 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.replace(1, 2, "foo");
    tokens.replace(1, 3, "bar");
    stream.fill();
    // wipes prior nested replace
    String result = tokens.getText();
    String expecting = "abar";
    assertEquals(expecting, result);
}

Example 89 with ANTLRInputStream

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

the class TestTokenStreamRewriter method testToStringStartStop2.

@Test
public void testToStringStartStop2() throws Exception {
    LexerGrammar g = new LexerGrammar("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;
    String input = "x = 3 * 0 + 2 * 0;";
    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream(input));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    String result = tokens.getTokenStream().getText();
    String expecting = "x = 3 * 0 + 2 * 0;";
    assertEquals(expecting, result);
    tokens.replace(4, 8, "0");
    stream.fill();
    // replace 3 * 0 with 0
    result = tokens.getText();
    expecting = "x = 0 + 2 * 0;";
    assertEquals(expecting, result);
    result = tokens.getText(Interval.of(0, 17));
    expecting = "x = 0 + 2 * 0;";
    assertEquals(expecting, result);
    result = tokens.getText(Interval.of(4, 8));
    expecting = "0";
    assertEquals(expecting, result);
    result = tokens.getText(Interval.of(0, 8));
    expecting = "x = 0";
    assertEquals(expecting, result);
    result = tokens.getText(Interval.of(12, 16));
    expecting = "2 * 0";
    assertEquals(expecting, result);
    tokens.insertAfter(17, "// comment");
    result = tokens.getText(Interval.of(12, 18));
    expecting = "2 * 0;// comment";
    assertEquals(expecting, result);
    result = tokens.getText(Interval.of(0, 8));
    stream.fill();
    // try again after insert at end
    expecting = "x = 0";
    assertEquals(expecting, result);
}

Example 90 with ANTLRInputStream

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

the class TestTokenStreamRewriter method testDistinguishBetweenInsertAfterAndInsertBeforeToPreserverOrder.

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