[antlr-interest] Compiling with 2.7.4; running with 2.7.2

[Paul J. Lucas]

	I'm wondering if it's possible to compile ANTLR grammars using
	2.7.4 yet use the 2.7.2 run-time.  Apparently, 2.7.2 doesn't
	support specifying a base class for lexers, i.e.:

		class MyLexer extends Lexer( "MyBaseLexer" );

	The release notes are fairly jumbled, so it's not clear from
	reading them.

	(I may need to do this because various parts of our software are
	still using 2.7.2 and they're afraid to upgrade.... Sigh...)

	- Paul



 
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