Examples with EOF org.antlr.v4.runtime.Recognizer.EOF used on opensource projects

Example 46 with EOF

use of org.antlr.v4.runtime.Recognizer.EOF in project antlr4 by tunnelvisionlabs.

the class TestATNLexerInterpreter method testLexerLoops.

@Test
public void testLexerLoops() throws Exception {
    LexerGrammar lg = new LexerGrammar("lexer grammar L;\n" + "INT : '0'..'9'+ ;\n" + "ID : 'a'..'z'+ ;\n");
    String expecting = "ID, INT, ID, INT, EOF";
    checkLexerMatches(lg, "a34bde3", expecting);
}

Example 47 with EOF

use of org.antlr.v4.runtime.Recognizer.EOF in project antlr4 by tunnelvisionlabs.

the class TestATNLexerInterpreter method testLexerKeywordIDAmbiguity.

@Test
public void testLexerKeywordIDAmbiguity() throws Exception {
    LexerGrammar lg = new LexerGrammar("lexer grammar L;\n" + "KEND : 'end' ;\n" + "ID : 'a'..'z'+ ;\n" + "WS : (' '|'\\n')+ ;");
    String expecting = "ID, EOF";
    // checkLexerMatches(lg, "e", expecting);
    expecting = "KEND, EOF";
    checkLexerMatches(lg, "end", expecting);
    expecting = "ID, EOF";
    checkLexerMatches(lg, "ending", expecting);
    expecting = "ID, WS, KEND, WS, ID, EOF";
    checkLexerMatches(lg, "a end bcd", expecting);
}

Example 48 with EOF

use of org.antlr.v4.runtime.Recognizer.EOF in project antlr4 by tunnelvisionlabs.

the class TestATNLexerInterpreter method testEOFAtEndOfLineComment.

@Test
public void testEOFAtEndOfLineComment() throws Exception {
    LexerGrammar lg = new LexerGrammar("lexer grammar L;\n" + "CMT : '//' ~('\\n')* ;\n");
    String expecting = "CMT, EOF";
    checkLexerMatches(lg, "//x", expecting);
}

Example 49 with EOF

use of org.antlr.v4.runtime.Recognizer.EOF in project antlr4 by tunnelvisionlabs.

the class TestATNParserPrediction method testEmptyInput.

@Test
public void testEmptyInput() throws Exception {
    LexerGrammar lg = new LexerGrammar("lexer grammar L;\n" + "A : 'a' ;\n" + "B : 'b' ;\n" + "C : 'c' ;\n");
    Grammar g = new Grammar("parser grammar T;\n" + "a : A | ;");
    int decision = 0;
    checkPredictedAlt(lg, g, decision, "a", 1);
    checkPredictedAlt(lg, g, decision, "", 2);
    // After matching these inputs for decision, what is DFA after each prediction?
    String[] inputs = { "a", "" };
    String[] dfa = { "s0-'a'->:s1=>1\n", "s0-EOF->:s2=>2\n" + "s0-'a'->:s1=>1\n" };
    checkDFAConstruction(lg, g, decision, inputs, dfa);
}

Example 50 with EOF

use of org.antlr.v4.runtime.Recognizer.EOF in project antlr4 by tunnelvisionlabs.

the class TestATNParserPrediction method testPEGAchillesHeel.

@Test
public void testPEGAchillesHeel() throws Exception {
    LexerGrammar lg = new LexerGrammar("lexer grammar L;\n" + "A : 'a' ;\n" + "B : 'b' ;\n" + "C : 'c' ;\n");
    Grammar g = new Grammar("parser grammar T;\n" + "a : A | A B ;");
    checkPredictedAlt(lg, g, 0, "a", 1);
    checkPredictedAlt(lg, g, 0, "ab", 2);
    checkPredictedAlt(lg, g, 0, "abc", 2);
    String[] inputs = { "a", "ab", "abc" };
    String[] dfa = { "s0-'a'->s1\n" + "s1-EOF->:s2=>1\n", "s0-'a'->s1\n" + "s1-EOF->:s2=>1\n" + "s1-'b'->:s3=>2\n", "s0-'a'->s1\n" + "s1-EOF->:s2=>1\n" + "s1-'b'->:s3=>2\n" };
    checkDFAConstruction(lg, g, 0, inputs, dfa);
}