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Fix sequence rules #12

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Fix sequence rules #12

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5758268
Fix sequence rules so they reduce.
matt-j-griffin Apr 25, 2025
161a73c
Ensure stmts use the correct sequence rules.
matt-j-griffin Apr 25, 2025
9fb9f52
Use the new sequence rule in the program step rule
matt-j-griffin Apr 25, 2025
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25 changes: 11 additions & 14 deletions bil.ott
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Original file line number Diff line number Diff line change
Expand Up @@ -459,7 +459,7 @@ defns program :: '' ::=
defn delta , w , var ~> delta' , w' , var' :: :: step :: '' by

delta,w,var |-> {addr=w1; size=w2; code=bil}
delta, w1.+w2 |- bil ~> delta',w3,{}
delta, w1.+w2 |- bil ~> delta',w3
---------------------------------------------------------- :: step
delta,w,var ~> delta',w3,var

Expand Down Expand Up @@ -790,23 +790,23 @@ defns reduce_stmt :: '' ::=


delta |- e ~>* true
delta,word |- seq ~> delta',word',{}
delta,word |- seq ~> delta',word'
------------------------------------- :: ifthen_true
delta,word |- if (e) seq ~> delta', word'

delta |- e ~>* true
delta,word |- seq ~> delta',word',{}
delta,word |- seq ~> delta',word'
------------------------------------- :: if_true
delta,word |- if (e) seq else seq1 ~> delta', word'

delta |- e ~>* false
delta,word |- seq ~> delta',word',{}
delta,word |- seq ~> delta',word'
------------------------------------- :: if_false
delta,word |- if (e) seq1 else seq ~> delta', word'


delta1 |- e ~>* true
delta1,word1 |- seq ~> delta2,word2,{}
delta1,word1 |- seq ~> delta2,word2
delta2,word2 |- while (e) seq ~> delta3,word3
--------------------------------------------- :: while
delta1,word1 |- while (e) seq ~> delta3,word3
Expand All @@ -819,21 +819,18 @@ defns reduce_stmt :: '' ::=

defn delta , word |- seq ~> delta' , word' , seq' :: :: seq :: '' by

delta,word |- s1 ~> delta',word'
------------------------------------------------------------- :: seq_rec
delta,word |- {s1; s2; ..; sn} ~> delta', word', {s2; ..; sn}

delta,word |- s1 ~> delta',word'
------------------------------------------------------------- :: seq_last
delta,word |- {s1; s2} ~> delta', word', {s2}
delta1,word1 |- s1 ~> delta2,word2
delta2,word2 |- {s2; ..; sn} ~> delta3, word3
------------------------------------------------------------- :: seq_rec
delta1,word1 |- {s1; s2; ..; sn} ~> delta3, word3

delta,word |- s1 ~> delta',word'
------------------------------------------------------------- :: seq_one
delta,word |- {s1} ~> delta', word', {}
delta,word |- {s1} ~> delta', word'


------------------------------------------------------------- :: seq_nil
delta,word |- {} ~> delta, word, {}
delta,word |- {} ~> delta, word

defns multistep_exp :: '' ::=

Expand Down