/*
* [The "BSD license"]
* Copyright (c) 2010 Terence Parr
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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package org.antlr.test;
import org.antlr.runtime.ANTLRStringStream;
import org.antlr.runtime.CharStream;
import org.antlr.runtime.tree.ParseTree;
import org.antlr.tool.Grammar;
import org.antlr.tool.Interpreter;
import org.junit.Test;
import static org.junit.Assert.*;
public class TestInterpretedParsing extends BaseTest {
/** Public default constructor used by TestRig */
public TestInterpretedParsing() {
}
@Test public void testSimpleParse() throws Exception {
Grammar pg = new Grammar(
"parser grammar p;\n"+
"prog : WHILE ID LCURLY (assign)* RCURLY EOF;\n" +
"assign : ID ASSIGN expr SEMI ;\n" +
"expr : INT | FLOAT | ID ;\n");
Grammar g = new Grammar();
g.importTokenVocabulary(pg);
g.setFileName(Grammar.IGNORE_STRING_IN_GRAMMAR_FILE_NAME +"string");
g.setGrammarContent(
"lexer grammar t;\n"+
"WHILE : 'while';\n"+
"LCURLY : '{';\n"+
"RCURLY : '}';\n"+
"ASSIGN : '=';\n"+
"SEMI : ';';\n"+
"ID : ('a'..'z')+ ;\n"+
"INT : (DIGIT)+ ;\n"+
"FLOAT : (DIGIT)+ '.' (DIGIT)* ;\n"+
"fragment DIGIT : '0'..'9';\n" +
"WS : (' ')+ ;\n");
CharStream input = new ANTLRStringStream("while x { i=1; y=3.42; z=y; }");
Interpreter lexEngine = new Interpreter(g, input);
FilteringTokenStream tokens = new FilteringTokenStream(lexEngine);
tokens.setTokenTypeChannel(g.getTokenType("WS"), 99);
//System.out.println("tokens="+tokens.toString());
Interpreter parseEngine = new Interpreter(pg, tokens);
ParseTree t = parseEngine.parse("prog");
String result = t.toStringTree();
String expecting =
"(<grammar p> (prog while x { (assign i = (expr 1) ;) (assign y = (expr 3.42) ;) (assign z = (expr y) ;) } <EOF>))";
assertEquals(expecting, result);
}
@Test public void testMismatchedTokenError() throws Exception {
Grammar pg = new Grammar(
"parser grammar p;\n"+
"prog : WHILE ID LCURLY (assign)* RCURLY;\n" +
"assign : ID ASSIGN expr SEMI ;\n" +
"expr : INT | FLOAT | ID ;\n");
Grammar g = new Grammar();
g.setFileName(Grammar.IGNORE_STRING_IN_GRAMMAR_FILE_NAME +"string");
g.importTokenVocabulary(pg);
g.setGrammarContent(
"lexer grammar t;\n"+
"WHILE : 'while';\n"+
"LCURLY : '{';\n"+
"RCURLY : '}';\n"+
"ASSIGN : '=';\n"+
"SEMI : ';';\n"+
"ID : ('a'..'z')+ ;\n"+
"INT : (DIGIT)+ ;\n"+
"FLOAT : (DIGIT)+ '.' (DIGIT)* ;\n"+
"fragment DIGIT : '0'..'9';\n" +
"WS : (' ')+ ;\n");
CharStream input = new ANTLRStringStream("while x { i=1 y=3.42; z=y; }");
Interpreter lexEngine = new Interpreter(g, input);
FilteringTokenStream tokens = new FilteringTokenStream(lexEngine);
tokens.setTokenTypeChannel(g.getTokenType("WS"), 99);
//System.out.println("tokens="+tokens.toString());
Interpreter parseEngine = new Interpreter(pg, tokens);
ParseTree t = parseEngine.parse("prog");
String result = t.toStringTree();
String expecting =
"(<grammar p> (prog while x { (assign i = (expr 1) MismatchedTokenException(6!=10))))";
assertEquals(expecting, result);
}
@Test public void testMismatchedSetError() throws Exception {
Grammar pg = new Grammar(
"parser grammar p;\n"+
"prog : WHILE ID LCURLY (assign)* RCURLY;\n" +
"assign : ID ASSIGN expr SEMI ;\n" +
"expr : INT | FLOAT | ID ;\n");
Grammar g = new Grammar();
g.importTokenVocabulary(pg);
g.setFileName("<string>");
g.setGrammarContent(
"lexer grammar t;\n"+
"WHILE : 'while';\n"+
"LCURLY : '{';\n"+
"RCURLY : '}';\n"+
"ASSIGN : '=';\n"+
"SEMI : ';';\n"+
"ID : ('a'..'z')+ ;\n"+
"INT : (DIGIT)+ ;\n"+
"FLOAT : (DIGIT)+ '.' (DIGIT)* ;\n"+
"fragment DIGIT : '0'..'9';\n" +
"WS : (' ')+ ;\n");
CharStream input = new ANTLRStringStream("while x { i=; y=3.42; z=y; }");
Interpreter lexEngine = new Interpreter(g, input);
FilteringTokenStream tokens = new FilteringTokenStream(lexEngine);
tokens.setTokenTypeChannel(g.getTokenType("WS"), 99);
//System.out.println("tokens="+tokens.toString());
Interpreter parseEngine = new Interpreter(pg, tokens);
ParseTree t = parseEngine.parse("prog");
String result = t.toStringTree();
String expecting =
"(<grammar p> (prog while x { (assign i = (expr MismatchedSetException(10!={5,6,7})))))";
assertEquals(expecting, result);
}
@Test public void testNoViableAltError() throws Exception {
Grammar pg = new Grammar(
"parser grammar p;\n"+
"prog : WHILE ID LCURLY (assign)* RCURLY;\n" +
"assign : ID ASSIGN expr SEMI ;\n" +
"expr : {;}INT | FLOAT | ID ;\n");
Grammar g = new Grammar();
g.importTokenVocabulary(pg);
g.setFileName("<string>");
g.setGrammarContent(
"lexer grammar t;\n"+
"WHILE : 'while';\n"+
"LCURLY : '{';\n"+
"RCURLY : '}';\n"+
"ASSIGN : '=';\n"+
"SEMI : ';';\n"+
"ID : ('a'..'z')+ ;\n"+
"INT : (DIGIT)+ ;\n"+
"FLOAT : (DIGIT)+ '.' (DIGIT)* ;\n"+
"fragment DIGIT : '0'..'9';\n" +
"WS : (' ')+ ;\n");
CharStream input = new ANTLRStringStream("while x { i=; y=3.42; z=y; }");
Interpreter lexEngine = new Interpreter(g, input);
FilteringTokenStream tokens = new FilteringTokenStream(lexEngine);
tokens.setTokenTypeChannel(g.getTokenType("WS"), 99);
//System.out.println("tokens="+tokens.toString());
Interpreter parseEngine = new Interpreter(pg, tokens);
ParseTree t = parseEngine.parse("prog");
String result = t.toStringTree();
String expecting =
"(<grammar p> (prog while x { (assign i = (expr NoViableAltException(10@[4:1: expr : ( INT | FLOAT | ID );])))))";
assertEquals(expecting, result);
}
}