diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/interp/parse.boot | 33 |
1 files changed, 19 insertions, 14 deletions
diff --git a/src/interp/parse.boot b/src/interp/parse.boot index 8328af6b..f2480254 100644 --- a/src/interp/parse.boot +++ b/src/interp/parse.boot @@ -333,7 +333,9 @@ parseOr u == (x:= parseTran first u) is ["not",y] => parseIf [y,parseOr rest u,"true"] true => parseIf [x,"true",parseOr rest u] -parseNot u == ['not,parseTran first u] +parseNot u == + $InteractiveMode => ["not",parseTran first u] + parseTran ["IF",first u,:'(false true)] parseEquivalence [a,b] == parseIf [a,b,parseIf [b,:'(false true)]] @@ -406,20 +408,23 @@ parseIf t == t isnt [p,a,b] => t ifTran(parseTran p,parseTran a,parseTran b) where ifTran(p,a,b) == - null($InteractiveMode) and p='true => a - null($InteractiveMode) and p='false => b - p is ['not,p'] => ifTran(p',b,a) - p is ['IF,p',a',b'] => ifTran(p',ifTran(a',COPY a,COPY b),ifTran(b',a,b)) - p is ['SEQ,:l,['exit,1,p']] => - ['SEQ,:l,['exit,1,ifTran(p',incExitLevel a,incExitLevel b)]] + null($InteractiveMode) and p="true" => a + null($InteractiveMode) and p="false" => b + p is ["not",p'] => ifTran(p',b,a) + p is ["IF",p',a',b'] => ifTran(p',ifTran(a',COPY a,COPY b),ifTran(b',a,b)) + p is ["SEQ",:l,["exit",1,p']] => + ["SEQ",:l,["exit",1,ifTran(p',incExitLevel a,incExitLevel b)]] --this assumes that l has no exits - a is ['IF, =p,a',.] => ['IF,p,a',b] - b is ['IF, =p,.,b'] => ['IF,p,a,b'] --- makeSimplePredicateOrNil p is ['SEQ,:s,['exit,1,val]] => --- parseTran ['SEQ,:s,['exit,1,incExitLevel ['IF,val,a,b]]] - ['IF,p,a,b] - -makeSimplePredicateOrNil p == nil + a is ["IF", =p,a',.] => ["IF",p,a',b] + b is ["IF", =p,.,b'] => ["IF",p,a,b'] + makeSimplePredicateOrNil p is ["SEQ",:s,["exit",1,val]] => + parseTran ["SEQ",:s,["exit",1,incExitLevel ["IF",val,a,b]]] + ["IF",p,a,b] + +makeSimplePredicateOrNil p == + isSimple p => nil + u:= isAlmostSimple p => u + true => wrapSEQExit [["LET",g:= GENSYM(),p],g] parseWhere l == ["where",:mapInto(l, function parseTran)] |