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allow special "tokens" start rule name so we can test pure lexer grammars.

This commit is contained in:
Terence Parr 2012-03-31 15:54:00 -07:00
parent 9fbe9b6e21
commit cc20a52cdd
1 changed files with 16 additions and 9 deletions
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25
runtime/Java/src/org/antlr/v4/runtime/misc/TestRig.java
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@ -57,6 +57,9 @@ import java.lang.reflect.Method;
* [input-filename]
*/
public class TestRig {
public static final String LEXER_START_RULE_NAME = "tokens";
public static void main(String[] args) throws Exception {
String grammarName;
String startRuleName;
@ -69,10 +72,12 @@ public class TestRig {
boolean diagnostics = false;
String encoding = null;
if ( args.length < 2 ) {
System.err.println("java org.antlr.v4.runtime.misc.TestRig GrammarName startRuleName" +
" [-tokens] [-print] [-gui] [-ps file.ps] [-encoding encodingname]" +
" [-trace] [-diagnostics]"+
" [input-filename]");
System.err.println("java org.antlr.v4.runtime.misc.TestRig GrammarName startRuleName\n" +
" [-tokens] [-print] [-gui] [-ps file.ps] [-encoding encodingname]\n" +
" [-trace] [-diagnostics]\n"+
" [input-filename]");
System.err.println("Use startRuleName='tokens' if GrammarName is a lexer grammar.");
System.err.println("Omitting input-filename makes rig read from stdin.");
return;
}
int i=0;
@ -121,16 +126,11 @@ public class TestRig {
}
// System.out.println("exec "+grammarName+"."+startRuleName);
String lexerName = grammarName+"Lexer";
String parserName = grammarName+"Parser";
ClassLoader cl = Thread.currentThread().getContextClassLoader();
Class lexerClass = cl.loadClass(lexerName);
if ( lexerClass==null ) {
System.err.println("Can't load "+lexerName);
}
Class parserClass = cl.loadClass(parserName);
if ( parserClass==null ) {
System.err.println("Can't load "+parserName);
}
InputStream is = System.in;
if ( inputFile!=null ) {
@ -158,6 +158,13 @@ public class TestRig {
}
}
if ( startRuleName.equals(LEXER_START_RULE_NAME) ) return;
String parserName = grammarName+"Parser";
Class parserClass = cl.loadClass(parserName);
if ( parserClass==null ) {
System.err.println("Can't load "+parserName);
}
Constructor<Parser> parserCtor = parserClass.getConstructor(TokenStream.class);
Parser parser = parserCtor.newInstance(tokens);