add

[git-p4: depot-paths = "//depot/code/antlr4/main/": change = 8985]

tool/playground/Scannerless.g

@@ -0,0 +1,31 @@
+scannerless grammar T;
+
+method : 'fun' name=ID '(' a+=arg (',' a+=arg)* ')' body ;
+
+body : '{' (body|CMT|.)* '}' ; // nongreedy
+
+stat:	'return' INT
+	|	ID '=' expr
+	;
+
+expr:	atom ('*' atom)* ;
+
+atom:	INT
+	|	sql
+	;
+
+sql :	'select' '*' 'from' ID ;
+
+// literals like 'select' become 'select' WS rules? hmm..nope
+// might not want WS. or might need &!id-letter or something
+
+always call WS implicitly after any token match; if don't want, then make WS undefined.
+
+RETURN : 'return' {!Character.isJavaId(input.LA(1))}? WS ;
+
+ID : 'a'..'z'+ ;
+
+WS : (' '|'\n')* ;
+
+CMT : '/*' (options {greedy=false;}:.)* '*'/ ;
+