1 /* 2 * [The "BSD license"] 3 * Copyright (c) 2010 Terence Parr 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 package org.antlr.test; 29 30 import org.antlr.runtime.ANTLRStringStream; 31 import org.antlr.runtime.CharStream; 32 import org.antlr.runtime.tree.ParseTree; 33 import org.antlr.tool.Grammar; 34 import org.antlr.tool.Interpreter; 35 import org.junit.Test; 36 37 public class TestInterpretedParsing extends BaseTest { 38 /** Public default constructor used by TestRig */ 39 public TestInterpretedParsing() { 40 } 41 42 @Test public void testSimpleParse() throws Exception { 43 Grammar pg = new Grammar( 44 "parser grammar p;\n"+ 45 "prog : WHILE ID LCURLY (assign)* RCURLY EOF;\n" + 46 "assign : ID ASSIGN expr SEMI ;\n" + 47 "expr : INT | FLOAT | ID ;\n"); 48 Grammar g = new Grammar(); 49 g.importTokenVocabulary(pg); 50 g.setFileName(Grammar.IGNORE_STRING_IN_GRAMMAR_FILE_NAME +"string"); 51 g.setGrammarContent( 52 "lexer grammar t;\n"+ 53 "WHILE : 'while';\n"+ 54 "LCURLY : '{';\n"+ 55 "RCURLY : '}';\n"+ 56 "ASSIGN : '=';\n"+ 57 "SEMI : ';';\n"+ 58 "ID : ('a'..'z')+ ;\n"+ 59 "INT : (DIGIT)+ ;\n"+ 60 "FLOAT : (DIGIT)+ '.' (DIGIT)* ;\n"+ 61 "fragment DIGIT : '0'..'9';\n" + 62 "WS : (' ')+ ;\n"); 63 CharStream input = new ANTLRStringStream("while x { i=1; y=3.42; z=y; }"); 64 Interpreter lexEngine = new Interpreter(g, input); 65 66 FilteringTokenStream tokens = new FilteringTokenStream(lexEngine); 67 tokens.setTokenTypeChannel(g.getTokenType("WS"), 99); 68 //System.out.println("tokens="+tokens.toString()); 69 Interpreter parseEngine = new Interpreter(pg, tokens); 70 ParseTree t = parseEngine.parse("prog"); 71 String result = t.toStringTree(); 72 String expecting = 73 "(<grammar p> (prog while x { (assign i = (expr 1) ;) (assign y = (expr 3.42) ;) (assign z = (expr y) ;) } <EOF>))"; 74 assertEquals(expecting, result); 75 } 76 77 @Test public void testMismatchedTokenError() throws Exception { 78 Grammar pg = new Grammar( 79 "parser grammar p;\n"+ 80 "prog : WHILE ID LCURLY (assign)* RCURLY;\n" + 81 "assign : ID ASSIGN expr SEMI ;\n" + 82 "expr : INT | FLOAT | ID ;\n"); 83 Grammar g = new Grammar(); 84 g.setFileName(Grammar.IGNORE_STRING_IN_GRAMMAR_FILE_NAME +"string"); 85 g.importTokenVocabulary(pg); 86 g.setGrammarContent( 87 "lexer grammar t;\n"+ 88 "WHILE : 'while';\n"+ 89 "LCURLY : '{';\n"+ 90 "RCURLY : '}';\n"+ 91 "ASSIGN : '=';\n"+ 92 "SEMI : ';';\n"+ 93 "ID : ('a'..'z')+ ;\n"+ 94 "INT : (DIGIT)+ ;\n"+ 95 "FLOAT : (DIGIT)+ '.' (DIGIT)* ;\n"+ 96 "fragment DIGIT : '0'..'9';\n" + 97 "WS : (' ')+ ;\n"); 98 CharStream input = new ANTLRStringStream("while x { i=1 y=3.42; z=y; }"); 99 Interpreter lexEngine = new Interpreter(g, input); 100 101 FilteringTokenStream tokens = new FilteringTokenStream(lexEngine); 102 tokens.setTokenTypeChannel(g.getTokenType("WS"), 99); 103 //System.out.println("tokens="+tokens.toString()); 104 Interpreter parseEngine = new Interpreter(pg, tokens); 105 ParseTree t = parseEngine.parse("prog"); 106 String result = t.toStringTree(); 107 String expecting = 108 "(<grammar p> (prog while x { (assign i = (expr 1) MismatchedTokenException(6!=10))))"; 109 assertEquals(expecting, result); 110 } 111 112 @Test public void testMismatchedSetError() throws Exception { 113 Grammar pg = new Grammar( 114 "parser grammar p;\n"+ 115 "prog : WHILE ID LCURLY (assign)* RCURLY;\n" + 116 "assign : ID ASSIGN expr SEMI ;\n" + 117 "expr : INT | FLOAT | ID ;\n"); 118 Grammar g = new Grammar(); 119 g.importTokenVocabulary(pg); 120 g.setFileName("<string>"); 121 g.setGrammarContent( 122 "lexer grammar t;\n"+ 123 "WHILE : 'while';\n"+ 124 "LCURLY : '{';\n"+ 125 "RCURLY : '}';\n"+ 126 "ASSIGN : '=';\n"+ 127 "SEMI : ';';\n"+ 128 "ID : ('a'..'z')+ ;\n"+ 129 "INT : (DIGIT)+ ;\n"+ 130 "FLOAT : (DIGIT)+ '.' (DIGIT)* ;\n"+ 131 "fragment DIGIT : '0'..'9';\n" + 132 "WS : (' ')+ ;\n"); 133 CharStream input = new ANTLRStringStream("while x { i=; y=3.42; z=y; }"); 134 Interpreter lexEngine = new Interpreter(g, input); 135 136 FilteringTokenStream tokens = new FilteringTokenStream(lexEngine); 137 tokens.setTokenTypeChannel(g.getTokenType("WS"), 99); 138 //System.out.println("tokens="+tokens.toString()); 139 Interpreter parseEngine = new Interpreter(pg, tokens); 140 ParseTree t = parseEngine.parse("prog"); 141 String result = t.toStringTree(); 142 String expecting = 143 "(<grammar p> (prog while x { (assign i = (expr MismatchedSetException(10!={5,6,7})))))"; 144 assertEquals(expecting, result); 145 } 146 147 @Test public void testNoViableAltError() throws Exception { 148 Grammar pg = new Grammar( 149 "parser grammar p;\n"+ 150 "prog : WHILE ID LCURLY (assign)* RCURLY;\n" + 151 "assign : ID ASSIGN expr SEMI ;\n" + 152 "expr : {;}INT | FLOAT | ID ;\n"); 153 Grammar g = new Grammar(); 154 g.importTokenVocabulary(pg); 155 g.setFileName("<string>"); 156 g.setGrammarContent( 157 "lexer grammar t;\n"+ 158 "WHILE : 'while';\n"+ 159 "LCURLY : '{';\n"+ 160 "RCURLY : '}';\n"+ 161 "ASSIGN : '=';\n"+ 162 "SEMI : ';';\n"+ 163 "ID : ('a'..'z')+ ;\n"+ 164 "INT : (DIGIT)+ ;\n"+ 165 "FLOAT : (DIGIT)+ '.' (DIGIT)* ;\n"+ 166 "fragment DIGIT : '0'..'9';\n" + 167 "WS : (' ')+ ;\n"); 168 CharStream input = new ANTLRStringStream("while x { i=; y=3.42; z=y; }"); 169 Interpreter lexEngine = new Interpreter(g, input); 170 171 FilteringTokenStream tokens = new FilteringTokenStream(lexEngine); 172 tokens.setTokenTypeChannel(g.getTokenType("WS"), 99); 173 //System.out.println("tokens="+tokens.toString()); 174 Interpreter parseEngine = new Interpreter(pg, tokens); 175 ParseTree t = parseEngine.parse("prog"); 176 String result = t.toStringTree(); 177 String expecting = 178 "(<grammar p> (prog while x { (assign i = (expr NoViableAltException(10@[4:1: expr : ( INT | FLOAT | ID );])))))"; 179 assertEquals(expecting, result); 180 } 181 182 } 183
