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// Testing non-context-free grammar in the syntax language.
delimiter = Delim;
void Delim();
Delim : "[ \n\r\t]+";
void Block();
Block : "{", (Stmt,)* "}";
void Stmt();
Stmt : "a";
Stmt : "b";
Stmt : Block;
// Syntax extension: add a new block where 'c' may appear!
Stmt : ExtraC;
void ExtraC();
ExtraC : "extra c", Block = ExtraCProd;
ExtraC..Stmt : "c";
// We can also use an additional production.
Stmt : ExtraD;
void ExtraD();
ExtraD : "extra d", Block;
ExtraD..Stmt : "d";
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