Package org.antlr.v4.tool

Examples of org.antlr.v4.tool.LexerGrammar

47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
import static org.junit.Assert.assertEquals;

public class TestUnbufferedTokenStream extends BaseTest {
  @Test public void testLookahead() 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 = 302;
        CharStream input = new ANTLRInputStream(
      new StringReader("x = 302;")
    );
        LexerInterpreter lexEngine = g.createLexerInterpreter(input);
        TokenStream tokens = new UnbufferedTokenStream<Token>(lexEngine);

    assertEquals("x", tokens.LT(1).getText());
    assertEquals(" ", tokens.LT(2).getText());
    assertEquals("=", tokens.LT(3).getText());
View Full Code Here
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
    assertEquals("302", tokens.LT(5).getText());
    assertEquals(";", tokens.LT(6).getText());
    }

  @Test public void testNoBuffering() 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 = 302;
        CharStream input = new ANTLRInputStream(
      new StringReader("x = 302;")
    );
        LexerInterpreter lexEngine = g.createLexerInterpreter(input);
    TestingUnbufferedTokenStream<Token> tokens = new TestingUnbufferedTokenStream<Token>(lexEngine);

    assertEquals("[[@0,0:0='x',<1>,1:0]]", tokens.getBuffer().toString());
    assertEquals("x", tokens.LT(1).getText());
    tokens.consume(); // move to WS
View Full Code Here
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
    assertEquals(";", tokens.LT(1).getText());
    assertEquals("[[@5,7:7=';',<3>,1:7]]", tokens.getRemainingBuffer().toString());
    }

  @Test public void testMarkStart() 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 = 302;
        CharStream input = new ANTLRInputStream(
      new StringReader("x = 302;")
    );
        LexerInterpreter lexEngine = g.createLexerInterpreter(input);
    TestingUnbufferedTokenStream<Token> tokens = new TestingUnbufferedTokenStream<Token>(lexEngine);

    int m = tokens.mark();
    assertEquals("[[@0,0:0='x',<1>,1:0]]", tokens.getBuffer().toString());
    assertEquals("x", tokens.LT(1).getText());
View Full Code Here
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
           " [@6,8:7='<EOF>',<-1>,1:8]]",
           tokens.getBuffer().toString());
    }

  @Test public void testMarkThenRelease() 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 = 302;
        CharStream input = new ANTLRInputStream(
      new StringReader("x = 302 + 1;")
    );
        LexerInterpreter lexEngine = g.createLexerInterpreter(input);
    TestingUnbufferedTokenStream<Token> tokens = new TestingUnbufferedTokenStream<Token>(lexEngine);

    int m = tokens.mark();
    assertEquals("[[@0,0:0='x',<1>,1:0]]", tokens.getBuffer().toString());
    assertEquals("x", tokens.LT(1).getText());
View Full Code Here
127
128
129
130
131
132
133
134
135
136
137
      "mode X;\n"+
      "B : 'a' ;\n"+
      "mode Y;\n"+
      "C : 'a' ;\n";

    LexerGrammar g = new LexerGrammar(grammar);

    String expectedTokenIDToTypeMap = "{EOF=-1, A=1, B=2, C=3}";
    String expectedStringLiteralToTypeMap = "{}";
    String expectedTypeToTokenList = "[A, B, C]";
View Full Code Here
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
  protected TokenStream createTokenStream(TokenSource src) {
    return new BufferedTokenStream(src);
  }

  @Test public void testFirstToken() 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;
        CharStream input = new ANTLRInputStream("x = 3 * 0 + 2 * 0;");
        LexerInterpreter lexEngine = g.createLexerInterpreter(input);
        TokenStream tokens = createTokenStream(lexEngine);

        String result = tokens.LT(1).getText();
        String expecting = "x";
        assertEquals(expecting, result);
View Full Code Here
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
        String expecting = "x";
        assertEquals(expecting, result);
    }

    @Test public void test2ndToken() 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;
        CharStream input = new ANTLRInputStream("x = 3 * 0 + 2 * 0;");
        LexerInterpreter lexEngine = g.createLexerInterpreter(input);
        TokenStream tokens = createTokenStream(lexEngine);

        String result = tokens.LT(2).getText();
        String expecting = " ";
        assertEquals(expecting, result);
View Full Code Here
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
        String expecting = " ";
        assertEquals(expecting, result);
    }

    @Test public void testCompleteBuffer() 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;
        CharStream input = new ANTLRInputStream("x = 3 * 0 + 2 * 0;");
        LexerInterpreter lexEngine = g.createLexerInterpreter(input);
        TokenStream tokens = createTokenStream(lexEngine);

        int i = 1;
        Token t = tokens.LT(i);
        while ( t.getType()!=Token.EOF ) {
View Full Code Here
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
        String expecting = "x = 3 * 0 + 2 * 0;";
        assertEquals(expecting, result);
    }

    @Test public void testCompleteBufferAfterConsuming() 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;
        CharStream input = new ANTLRInputStream("x = 3 * 0 + 2 * 0;");
        LexerInterpreter lexEngine = g.createLexerInterpreter(input);
        TokenStream tokens = createTokenStream(lexEngine);

        Token t = tokens.LT(1);
        while ( t.getType()!=Token.EOF ) {
            tokens.consume();
View Full Code Here
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
        String expecting = "x = 3 * 0 + 2 * 0;";
        assertEquals(expecting, result);
    }

    @Test public void testLookback() 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;
        CharStream input = new ANTLRInputStream("x = 3 * 0 + 2 * 0;");
        LexerInterpreter lexEngine = g.createLexerInterpreter(input);
        TokenStream tokens = createTokenStream(lexEngine);

        tokens.consume(); // get x into buffer
        Token t = tokens.LT(-1);
        assertEquals("x", t.getText());
View Full Code Here
TOP

Related Classes of org.antlr.v4.tool.LexerGrammar

  • org.antlr.runtime.ANTLRFileStream
  • org.antlr.runtime.ANTLRStringStream
  • org.antlr.runtime.CharStream
  • org.antlr.runtime.CommonToken
  • org.antlr.runtime.Token
  • org.antlr.runtime.tree.CommonTree
  • org.antlr.runtime.tree.CommonTreeNodeStream
  • org.antlr.runtime.tree.Tree
  • org.antlr.runtime.tree.TreeVisitor
  • org.antlr.runtime.tree.TreeVisitorAction
    • Copyright © 2018 www.massapicom. All rights reserved.
    All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.