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/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package org.anarres.cpp;
import com.google.common.io.CharStreams;
import java.io.IOException;
import java.io.Reader;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static org.junit.Assert.*;
/**
*
* @author shevek
*/
public class VaArgsPastingTest {
private static final Logger LOG = LoggerFactory.getLogger(VaArgsPastingTest.class);
@Test
public void testWhitespacePasting() throws IOException {
String input
= "#define REGULAR_ARGS(x, y) foo(x, y)\n"
+ "#define REGULAR_ELLIPSIS(x, y...) foo(x, y)\n"
+ "#define REGULAR_VAARGS(x, ...) foo(x, __VA_ARGS__)\n"
+ "#define PASTE_ARGS(x, y) foo(x, ## y)\n"
+ "#define PASTE_ELLIPSIS(x, y...) foo(x, ## y)\n"
+ "#define PASTE_VAARGS(x, ...) foo(x, ## __VA_ARGS__)\n"
+ ""
+ "REGULAR_ARGS(a, b) // REGULAR_ARGS 2\n"
+ "REGULAR_ELLIPSIS(a, b) // REGULAR_ELLIPSIS 2\n"
+ "REGULAR_ELLIPSIS(a) // REGULAR_ELLIPSIS 1\n"
+ "REGULAR_VAARGS(a, b) // REGULAR_VAARGS 2\n"
+ "REGULAR_VAARGS(a) // REGULAR_VAARGS 1\n"
+ ""
+ "PASTE_ARGS(a, b) // PASTE_ARGS 2\n"
+ "PASTE_ELLIPSIS(a, b) // PASTE_ELLIPSIS 2\n"
+ "PASTE_ELLIPSIS(a) // PASTE_ELLIPSIS 1\n"
+ "PASTE_VAARGS(a, b) // PASTE_VAARGS 2\n"
+ "PASTE_VAARGS(a) // PASTE_VAARGS 1\n";
LOG.info("Input is:\n" + input);
Preprocessor pp = new Preprocessor();
pp.addFeature(Feature.KEEPCOMMENTS);
pp.addInput(new StringLexerSource(input, true));
Reader r = new CppReader(pp);
String output = CharStreams.toString(r).trim();
LOG.info("Output is:\n" + output);
assertEquals("foo(a, b) // REGULAR_ARGS 2\n"
+ "foo(a, b) // REGULAR_ELLIPSIS 2\n"
+ "foo(a, ) // REGULAR_ELLIPSIS 1\n"
+ "foo(a, b) // REGULAR_VAARGS 2\n"
+ "foo(a, ) // REGULAR_VAARGS 1\n"
+ "foo(a,b) // PASTE_ARGS 2\n" // cpp outputs a warning and a space after the comma, similar below.
+ "foo(a,b) // PASTE_ELLIPSIS 2\n"
+ "foo(a) // PASTE_ELLIPSIS 1\n"
+ "foo(a,b) // PASTE_VAARGS 2\n"
+ "foo(a) // PASTE_VAARGS 1\n", output);
}
}
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