jFuzzyLogic/antlr_3_1_source/test/TestASTConstruction.java

/*
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 Copyright (c) 2005-2006 Terence Parr
 All rights reserved.

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 1. Redistributions of source code must retain the above copyright
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    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
 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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*/
package org.antlr.test;

import org.antlr.tool.Grammar;

public class TestASTConstruction extends BaseTest {

    /** Public default constructor used by TestRig */
    public TestASTConstruction() {
    }

	public void testA() throws Exception {
		Grammar g = new Grammar(
				"parser grammar P;\n"+
				"a : A;");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT A <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testNakeRulePlusInLexer() throws Exception {
		Grammar g = new Grammar(
				"lexer grammar P;\n"+
				"A : B+;\n" +
				"B : 'a';");
		String expecting =
			" ( rule A ARG RET scope ( BLOCK ( ALT ( + ( BLOCK ( ALT B <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("A").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testRulePlus() throws Exception {
		Grammar g = new Grammar(
				"parser grammar P;\n"+
				"a : (b)+;\n" +
				"b : B;");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT ( + ( BLOCK ( ALT b <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testNakedRulePlus() throws Exception {
		Grammar g = new Grammar(
				"parser grammar P;\n"+
				"a : b+;\n" +
				"b : B;");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT ( + ( BLOCK ( ALT b <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testRuleOptional() throws Exception {
		Grammar g = new Grammar(
				"parser grammar P;\n"+
				"a : (b)?;\n" +
				"b : B;");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT ( ? ( BLOCK ( ALT b <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testNakedRuleOptional() throws Exception {
		Grammar g = new Grammar(
				"parser grammar P;\n"+
				"a : b?;\n" +
				"b : B;");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT ( ? ( BLOCK ( ALT b <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testRuleStar() throws Exception {
		Grammar g = new Grammar(
				"parser grammar P;\n"+
				"a : (b)*;\n" +
				"b : B;");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT ( * ( BLOCK ( ALT b <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testNakedRuleStar() throws Exception {
		Grammar g = new Grammar(
				"parser grammar P;\n"+
				"a : b*;\n" +
				"b : B;");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT ( * ( BLOCK ( ALT b <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testCharStar() throws Exception {
		Grammar g = new Grammar(
				"grammar P;\n"+
				"a : 'a'*;");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT ( * ( BLOCK ( ALT 'a' <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testCharStarInLexer() throws Exception {
		Grammar g = new Grammar(
				"lexer grammar P;\n"+
				"B : 'b'*;");
		String expecting =
			" ( rule B ARG RET scope ( BLOCK ( ALT ( * ( BLOCK ( ALT 'b' <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("B").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testStringStar() throws Exception {
		Grammar g = new Grammar(
				"grammar P;\n"+
				"a : 'while'*;");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT ( * ( BLOCK ( ALT 'while' <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testStringStarInLexer() throws Exception {
		Grammar g = new Grammar(
				"lexer grammar P;\n"+
				"B : 'while'*;");
		String expecting =
			" ( rule B ARG RET scope ( BLOCK ( ALT ( * ( BLOCK ( ALT 'while' <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("B").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testCharPlus() throws Exception {
		Grammar g = new Grammar(
				"grammar P;\n"+
				"a : 'a'+;");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT ( + ( BLOCK ( ALT 'a' <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testCharPlusInLexer() throws Exception {
		Grammar g = new Grammar(
				"lexer grammar P;\n"+
				"B : 'b'+;");
		String expecting =
			" ( rule B ARG RET scope ( BLOCK ( ALT ( + ( BLOCK ( ALT 'b' <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("B").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testCharOptional() throws Exception {
		Grammar g = new Grammar(
				"grammar P;\n"+
				"a : 'a'?;");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT ( ? ( BLOCK ( ALT 'a' <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testCharOptionalInLexer() throws Exception {
		Grammar g = new Grammar(
				"lexer grammar P;\n"+
				"B : 'b'?;");
		String expecting =
			" ( rule B ARG RET scope ( BLOCK ( ALT ( ? ( BLOCK ( ALT 'b' <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("B").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testCharRangePlus() throws Exception {
		Grammar g = new Grammar(
				"lexer grammar P;\n"+
				"ID : 'a'..'z'+;");
		String expecting =
			" ( rule ID ARG RET scope ( BLOCK ( ALT ( + ( BLOCK ( ALT ( .. 'a' 'z' ) <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("ID").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testLabel() throws Exception {
		Grammar g = new Grammar(
				"grammar P;\n"+
				"a : x=ID;");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT ( = x ID ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testLabelOfOptional() throws Exception {
		Grammar g = new Grammar(
				"grammar P;\n"+
				"a : x=ID?;");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT ( ? ( BLOCK ( ALT ( = x ID ) <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testLabelOfClosure() throws Exception {
		Grammar g = new Grammar(
				"grammar P;\n"+
				"a : x=ID*;");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT ( * ( BLOCK ( ALT ( = x ID ) <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testRuleLabel() throws Exception {
		Grammar g = new Grammar(
				"grammar P;\n"+
				"a : x=b;\n" +
				"b : ID;\n");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT ( = x b ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testSetLabel() throws Exception {
		Grammar g = new Grammar(
				"grammar P;\n"+
				"a : x=(A|B);\n");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT ( = x ( BLOCK ( ALT A <end-of-alt> ) ( ALT B <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testNotSetLabel() throws Exception {
		Grammar g = new Grammar(
				"grammar P;\n"+
				"a : x=~(A|B);\n");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT ( = x ( ~ ( BLOCK ( ALT A <end-of-alt> ) ( ALT B <end-of-alt> ) <end-of-block> ) ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testNotSetListLabel() throws Exception {
		Grammar g = new Grammar(
				"grammar P;\n"+
				"a : x+=~(A|B);\n");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT ( += x ( ~ ( BLOCK ( ALT A <end-of-alt> ) ( ALT B <end-of-alt> ) <end-of-block> ) ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testNotSetListLabelInLoop() throws Exception {
		Grammar g = new Grammar(
				"grammar P;\n"+
				"a : x+=~(A|B)+;\n");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT ( + ( BLOCK ( ALT ( += x ( ~ ( BLOCK ( ALT A <end-of-alt> ) ( ALT B <end-of-alt> ) <end-of-block> ) ) ) <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testRuleLabelOfPositiveClosure() throws Exception {
		Grammar g = new Grammar(
				"grammar P;\n"+
				"a : x=b+;\n" +
				"b : ID;\n");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT ( + ( BLOCK ( ALT ( = x b ) <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testListLabelOfClosure() throws Exception {
		Grammar g = new Grammar(
				"grammar P;\n"+
				"a : x+=ID*;");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT ( * ( BLOCK ( ALT ( += x ID ) <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testListLabelOfClosure2() throws Exception {
		Grammar g = new Grammar(
				"grammar P;\n"+
				"a : x+='int'*;");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT ( * ( BLOCK ( ALT ( += x 'int' ) <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testRuleListLabelOfPositiveClosure() throws Exception {
		Grammar g = new Grammar(
				"grammar P;\n" +
				"options {output=AST;}\n"+
				"a : x+=b+;\n" +
				"b : ID;\n");
		String expecting =
			" ( rule a ARG RET scope ( BLOCK ( ALT ( + ( BLOCK ( ALT ( += x b ) <end-of-alt> ) <end-of-block> ) ) <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("a").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testRootTokenInStarLoop() throws Exception {
		Grammar g = new Grammar(
				"grammar Expr;\n" +
				"options { backtrack=true; }\n" +
				"a : ('*'^)* ;\n");  // bug: the synpred had nothing in it
		String expecting =
			" ( rule synpred1_Expr ARG RET scope ( BLOCK ( ALT '*' <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("synpred1_Expr").tree.toStringTree();
		assertEquals(expecting, found);
	}

	public void testActionInStarLoop() throws Exception {
		Grammar g = new Grammar(
				"grammar Expr;\n" +
				"options { backtrack=true; }\n" +
				"a : ({blort} 'x')* ;\n");  // bug: the synpred had nothing in it
		String expecting =
			" ( rule synpred1_Expr ARG RET scope ( BLOCK ( ALT blort 'x' <end-of-alt> ) <end-of-block> ) <end-of-rule> )";
		String found = g.getRule("synpred1_Expr").tree.toStringTree();
		assertEquals(expecting, found);
	}

}