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WBRASWELL / Parse-Eyapp-1.21 / examples / debuggingtut / bugyapp3.eyp 
# This grammar illustrate the use of 'strict'
# see http://search.cpan.org/perldoc?Parse::Eyapp::debuggingtut
# see also file 'bugyapp2.eyp'
%strict
%token NUM
%%
expr: NUM;
%%