13 // output "s2:{s2:{s0 s0} x}";
14 // output "s2:{s0 x}";
33 // Hello ::= "hello" { "there" "how" { "are" } }
38 output "1:{{a b} {c}}";
41 ids ::= id (" " ids &~ id [~]*) => "1"
42 | id ( ids &~ id [~]*) => "2"
50 output "2:{{a} 1:{{b} {c}}}";
51 output "1:{{a b} {c}}";
54 ids ::= id " " ids => "1"
87 output "ac:{{2 1 2 1}}";
88 //output "a:{{2 1 2 1}}";
89 //output "c:{{c:{1 1} c:{1 1}}}";
101 b ::= (x "2" => "b")*
102 c ::= (x "2" x "1" => "c")*
108 output "bam:{a bam:{a bam:{a x}}}";
117 output "s2:{b0 a:{a:{epsilon}}}";
118 output "b:{a:{a:{epsilon}} epsilon}";
129 output "q:{a:{s1:{epsilon}}}";
133 x ::= () => "epsilon"
139 output "s1:{a2:{a2:{a0 b0} b0}}";
142 a ::= "a" a b => "a2"
150 output "s3:{s3:{epsilon a0 epsilon epsilon} epsilon epsilon epsilon}";
151 output "s3:{s3:{epsilon epsilon epsilon epsilon} a0 epsilon epsilon}";
152 output "s3:{s3:{epsilon epsilon a0 epsilon} epsilon epsilon epsilon}";
153 output "s3:{s3:{epsilon epsilon epsilon a0} epsilon epsilon epsilon}";
154 output "s3:{epsilon epsilon a0 a0}";
155 output "s3:{s3:{s3:{epsilon epsilon epsilon epsilon} epsilon epsilon epsilon} epsilon epsilon epsilon}";
156 output "s3:{s3:{epsilon epsilon epsilon epsilon} epsilon epsilon a0}";
157 output "s3:{s3:{epsilon epsilon epsilon epsilon} epsilon a0 epsilon}";
158 output "s3:{epsilon a0 epsilon a0}";
159 output "s3:{epsilon a0 a0 epsilon}";
161 s ::= "a" s a a a => "s3"
169 output "poo:{poo:{poox poox} poox}";
170 output "poo:{poox poo:{poox poox}}";
171 s ::= s s "a" => "poo"
177 output "s:{aa:{aa:{a b} b}}";
179 a ::= "a" a b => "aa"
186 output "sx:{b aa:{aa:{b b} b}}";
187 s ::= b d "a" "b" => "sx"
188 s ::= "a" d "a" d => "sy"
189 d ::= "a" a b => "aa"
190 a ::= "a" b b => "aa"
197 output "+:{{a} *:{{b} {c}}}";
209 output "plus:{stringify:{{a}} minus:{stringify:{{b}} times:{stringify:{{d}} stringify:{{c}}}}}";
210 output "times:{plus:{stringify:{{a}} minus:{stringify:{{b}} stringify:{{d}}}} stringify:{{c}}}";
211 output "plus:{stringify:{{a}} times:{minus:{stringify:{{b}} stringify:{{d}}} stringify:{{c}}}}";
212 output "times:{minus:{plus:{stringify:{{a}} stringify:{{b}}} stringify:{{d}}} stringify:{{c}}}";
213 output "minus:{plus:{stringify:{{a}} stringify:{{b}}} times:{stringify:{{d}} stringify:{{c}}}}";
216 s ::= l "=" q => "assign"
219 | l "=" q => "assign"
224 id ::= idl++ => "stringify"
230 output "times:{stringify:{{a}} times:{stringify:{{b}} stringify:{{c}}}}";
233 s ::= l "=" r => "assign"
236 | l "=" r => "assign"
238 | (r) "*" r => "times"
241 id ::= idl++ => "stringify"
247 output "plus:{stringify:{{a}} times:{stringify:{{b}} stringify:{{c}}}}";
250 s ::= l "=" r => "assign"
253 | l "=" r => "assign"
258 id ::= idl++ => "stringify"
279 output "smt:{while:{>:{{x} {0}} while:{>:{{y} {0}} sbb:{{f o o} {b a r}}}}}";
280 output "smt:{while:{>:{{x} {0}} sbb:{while:{>:{{y} {0}} {f o o}} {b a r}}}}";
283 outdent !::= " " outdent " "
287 s ::= !any "\n\n" !ww statement !ww "\n\n" !any => smt
292 block ::= "\n" !indent blockBody
293 &~ "\n" outdent [~\ ] [~]*
295 blockBody ::= statement
296 > statement blockBody /ws => "sbb"
299 | ^"while" expr block /ws
306 call ::= expr "()" /ws
310 ident ::= [a-z]++ &~ keyword
311 keyword ::= "if" | "then" | "else" | "while"
313 w ::= " " | "\n" | "\r"