Changeset 836


Ignore:
Timestamp:
12/05/18 21:04:54 (7 days ago)
Author:
Maciej Komosinski
Message:

Introduced ternary conditional operator a?b:c

File:
1 edited

Legend:

Unmodified
Added
Removed
  • cpp/frams/vm/framscript.y

    r652 r836  
    872872 }
    873873
    874 
     874       | expr '?'
     875 {
     876 trctx.emitLine();
     877// trctx.out->printf("\n####### conditional operator\n");
     878 $$.counter=trctx.labelcounter++;
     879 warnTruthValue($1);
     880 if ($1.constant)
     881         {
     882         ExtValue::CompareResult cond=$1.compare(ExtValue::zero());
     883         $1.counter=0;
     884         if (resultIsRelaxedEqual(cond))
     885                 trctx.out->printf("jump :_cond_false_%d\n",$$.counter);
     886         }
     887 else
     888         {
     889         trstack.adjust(+1);
     890         trctx.out->printf("if ~=,m[m0++],:_cond_false_%d\n",$$.counter);
     891         }
     892 $$.stack=trstack.currentPos();
     893// trctx.out->printf("\n####### conditional - true\n");
     894 }
     895         stackexpr ':'
     896 {
     897 trctx.emitLine();
     898 trctx.out->printf("jump :_cond_end_%d\n",$3.counter);
     899 trctx.out->printf(":_cond_false_%d\n",$3.counter);
     900// trctx.out->printf("\n####### conditional - false\n");
     901 trstack.adjust($3.stack-trstack.currentPos());
     902 }
     903         stackexpr
     904 {
     905 trctx.emitLine();
     906 trctx.out->printf(":_cond_end_%d\n",$3.counter);
     907// trctx.out->printf("\n####### conditional - end\n");
     908 $$.ident=false; $$.constant=0; $$.parens=0; $$.assign=0;
     909 }
     910         
    875911       | expr LSHIFT expr { handleTwoArg($$,$1,$3,LSHIFT,"shift",0,0); }
    876912       | expr RSHIFT expr { handleTwoArg($$,$1,$3,RSHIFT,"shift",1,0); }
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