diff options
Diffstat (limited to 'src/interp/c-util.boot')
| -rw-r--r-- | src/interp/c-util.boot | 33 |
1 files changed, 27 insertions, 6 deletions
diff --git a/src/interp/c-util.boot b/src/interp/c-util.boot index e135583f..3304a391 100644 --- a/src/interp/c-util.boot +++ b/src/interp/c-util.boot @@ -41,7 +41,7 @@ module c_-util where replaceSimpleFunctions: %Form -> %Form foldExportedFunctionReferences: %List -> %List diagnoseUnknownType: (%Mode,%Env) -> %Form - declareUnusedParameters: (%List,%Code) -> %List + declareUnusedParameters: %Code -> %Code registerFunctionReplacement: (%Symbol,%Form) -> %Thing getFunctionReplacement: %Symbol -> %Form getSuccessEnvironment: (%Form,%Env) -> %Env @@ -156,13 +156,34 @@ wantArgumentsAsTuple: (%List,%Signature) -> %Boolean wantArgumentsAsTuple(args,sig) == isHomoegenousVarargSignature sig and #args ~= #sig +$AbstractionOperator == + '(LAM ILAM SLAM SPADSLAM LAMBDA) + +++ Return true if the symbol 's' is used in the form 'x'. +usedSymbol?(s,x) == + symbol? x => s = x + atom x => false + x is ['QUOTE,:.] => false + x is [op,parms,:body] and op in $AbstractionOperator => + x in parms => false + usedSymbol?(x,body) + or/[usedSymbol?(s,x') for x' in x] + + ++ We are about to seal the (Lisp) definition of a function. -++ Augment the `body' with a declaration for those `parms' +++ Augment the body of any function definition in the form `x' +++ with declarations for unused parameters. ++ that are unused. -declareUnusedParameters(parms,body) == - unused := [p for p in parms | not CONTAINED(p,body)] - null unused => [body] - [["DECLARE",["IGNORE",:unused]],body] +declareUnusedParameters x == (augment x; x) where + augment x == + isAtomicForm x => nil + x is [op,parms,body] and op in $AbstractionOperator => + augment body + unused := [p for p in parms | not usedSymbol?(p,body)] + null unused => [body] + x.rest.rest := [["DECLARE",["IGNORE",:unused]],body] + for x' in x repeat + augment x' devaluate d == not REFVECP d => d |