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

Example 26 with ANTLRInputStream

use of org.antlr.v4.runtime.ANTLRInputStream 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 27 with ANTLRInputStream

use of org.antlr.v4.runtime.ANTLRInputStream 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 28 with ANTLRInputStream

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

Example 29 with ANTLRInputStream

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

the class TestTokenStreamRewriter method testReplaceAll.

@Test
public void testReplaceAll() 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(0, 6, "x");
    String result = tokens.getText();
    String expecting = "x";
    assertEquals(expecting, result);
}

Example 30 with ANTLRInputStream

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

the class TestTokenStreamRewriter method testReplaceThenReplaceSuperset.

@Test
public void testReplaceThenReplaceSuperset() 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");
    tokens.replace(3, 5, "foo");
    stream.fill();
    // overlaps, error
    Exception exc = null;
    try {
        tokens.getText();
    } catch (IllegalArgumentException iae) {
        exc = iae;
    }
    String expecting = "replace op boundaries of <ReplaceOp@[@3,3:3='c',<3>,1:3]..[@5,5:5='b',<2>,1:5]:\"foo\"> overlap with previous <ReplaceOp@[@2,2:2='c',<3>,1:2]..[@4,4:4='c',<3>,1:4]:\"xyz\">";
    assertNotNull(exc);
    assertEquals(expecting, exc.getMessage());
}