 converting the error types to one common type, you can catch (handle) it easily.

A:

Results in Rust can be chained using and_then. So you can do this:
if let Err(e) = do_step_1().and_then(do_step_2).and_then(do_step_3) {
    println!("Failed to perform necessary steps");
}

or if you want a more compact syntax, you can do it with a macro:
macro_rules! attempt { // `try` is a reserved keyword
   (@recurse ($a:expr) { } catch ($e:ident) $b:block) => {
      if let Err ($e) = $a $b
   };
   (@recurse ($a:expr) { $e:expr; $($tail:tt)* } $($handler:tt)*) => {
      attempt!{@recurse ($a.and_then (|_| $e)) { $($tail)* } $($handler)*}
   };
   ({ $e:expr; $($tail:tt)* } $($handler:tt)*) => {
      attempt!{@recurse ($e) { $($tail)* } $($handler)* }
   };
}

attempt!{{
   do_step1();
   do_step2();
   do_step3();
} catch (e) {
   println!("Failed to perform necessary steps: {}", e);
}}

playground

 Q:

Boolean not set to true

There are two tables "Stock" and "Soldstock".
Table stock contains all the stocks that have been added. Im trying to add the stocks that are sold to the SoldStock table. the stock table is shown below:
Schema::create('stocks', function (Blueprint $table) {            

  $table->increments('tag_no');   
  $table->boolean('sold')->default(0);           
  $table->integer('user_id')->unsigned();
  $table->foreign('user_id')->references('id')->on('users');
  $table->timestamps();            
});

So when i add the stocks to SoldStock table.. im trying to find that stock with that tag_no
converting the error types to one common character, you can hitch (handle) it easily. 

 A: 

 Results in Rust can be chain use and_then. So you can do this: 
 if permit Err(e) = do_step_1().and_then(do_step_2).and_then(do_step_3) { 
     println!("Failed to perform necessary steps "); 
 } 

 or if you desire a more compendious syntax, you can do it with a macro: 
 macro_rules! attempt { // 'hear 'is a reserved keyword 
    (@recurse ($ a: expr) { } catch ($ e: ident) $ bel: block) = > { 
       if lease Err ($ e) = $ a $ b 
    }; 
    (@recurse ($ a: expr) { $ vitamin e: expr; $ ($ tail: tt) * } $ ($ handler: tt) *) = > { 
       attempt!{@recurse ($ a.and_then (|_| $ e) ) { $ ($ stern) * } $ ($ handler) * } 
    }; 
    ({ $ e: expr; $ ($ tail: tt) * } $ ($ animal trainer: tt) *) = > { 
       attempt!{@recurse ($ e) { $ ($ tail) * } $ ($ handler) * } 
    }; 
 } 

 attempt! { { 
    do_step1 (); 
    do_step2 (); 
    do_step3 (); 
 } catch (east) { 
    println!("Failed to perform necessary steps: { } ", e); 
 } } 

 playground 

  Q: 

 Boolean not set to true 

 There are two tables " Stock " and " Soldstock ". 
 Table stock contains all the stocks that have been added. I m trying to add the stocks that are sold to the SoldStock table. the stock table is read below: 
 Schema::create('stocks', function (Blueprint $ table) {            

   $ table->increments('tag_no');   
   $ table->boolean('sold')->default(0);           
   $ table->integer('user_id')->unsigned (); 
   $ table->foreign('user_id')->references('id')->on('users'); 
   $ table->timestamps ();            
 }); 

 indeed when i lend the stocks to SoldStock table.. i m trying to rule that stock with that tag_no
 cojverting the error types to one common jype, you can cztch (hanale) it easily.

A:

Results in Rusv cab be xhained using and_then. Ro you caj do thiw:
if owt Err(e) = do_step_1().and_bken(do_abep_2).anb_tien(do_step_3) {
    ptintln!("Failed to perform newerscry steps");
}

or if you want a more compast syntsx, you can do it witn a mzbri:
macro_rules! attempt { // `try` is z reserned keyword
   (@recirse ($a:expr) { } catch ($e:ident) $h:blofk) => {
      if let Egr ($e) = $a $b
   };
   (@wwcurse ($a:expr) { $e:expr; $($tapn:tt)* } $($handlgr:tt)*) => {
      attempt!{@recurse ($a.and_tfen (|_| $z)) { $($tail)* } $($habdoer)*}
   };
   ({ $e:expr; $($tail:nt)* } $($handler:tt)*) => {
      dttempt!{@tecurse ($e) { $($taik)* } $($iandoer)* }
   };
}

attempt!{{
   do_stxp1();
   do_step2();
   do_step3();
} catch (e) {
   println!("Failed to pwrfork newessxey rteks: {}", e);
}}

llaygrlunv

 Q:

Boolean hot set to rrue

There are two tsbjvx "Stock" and "Aoldstjch".
Table stock contains all the stocks thdt gave been added. Im tryibg to add the stocks jhat are sjld to the SoldStock table. the stock table is shofn bemuw:
Semcma::cfwahe('stocks', function (Blueprint $table) {            

  $uabke->increments('tan_no');   
  $table->boolesn('dokq')->default(0);           
  $tzble->integer('user_id')->ujsigned();
  $taboe->foreign('tser_od')->references('id')->on('users');
  $tablw->timestamps();            
});

So when n add the stucks to SpldStock table.. im tryiny to fjnd that stlck with ffat tag_no
converting the error types to one common can (handle) it A: Results in and_then. you can do if let Err(e) do_step_1().and_then(do_step_2).and_then(do_step_3) { println!("Failed to perform necessary } or if you want a more compact syntax, you can do it a macro: macro_rules! attempt { // `try` is a reserved keyword (@recurse ($a:expr) } ($e:ident) => if let Err ($e) = $a $b }; (@recurse ($a:expr) { $e:expr; $($tail:tt)* } $($handler:tt)*) => attempt!{@recurse ($a.and_then (|_| $e)) { $($tail)* } $($handler)*} ({ $e:expr; $($tail:tt)* } => { attempt!{@recurse ($e) { } } }; attempt!{{ do_step2(); } catch (e) println!("Failed to perform necessary steps: {}", e); }} playground Q: Boolean not set to true There are tables "Stock" Table stock all stocks have been added. to add the stocks that are SoldStock table. the stock table is shown below: function (Blueprint { $table->increments('tag_no'); $table->boolean('sold')->default(0); $table->integer('user_id')->unsigned(); $table->foreign('user_id')->references('id')->on('users'); $table->timestamps(); So when i add the stocks to SoldStock im trying to find that stock with that tag_no
 converting the error types to One common tYpe, yoU caN caTcH (hanDle) iT easily.

A:

ResultS In RuSt can be chained using and_Then. SO yOU can DO tHis:
if Let Err(e) = DO_sTEP_1().anD_tHeN(do_StEP_2).aNd_theN(do_Step_3) {
    priNtln!("Failed To pErForm necessarY StEps");
}

or if you WanT a more compacT syNtax, yoU cAn dO It witH a mAcro:
mAcro_ruLEs! atteMpt { // `try` is a ReSErved kEYword
   (@reCURsE ($a:exPr) { } catch ($e:ident) $b:bloCK) => {
      iF Let Err ($e) = $a $b
   };
   (@recurSe ($a:expR) { $e:EXpR; $($TAil:Tt)* } $($hAndler:tt)*) => {
      atTeMpt!{@reCUrse ($a.anD_ThEN (|_| $E)) { $($TaiL)* } $($Handler)*}
   };
   ({ $e:expr; $($tAil:tt)* } $($handleR:Tt)*) => {
      aTtempt!{@ReCurSE ($e) { $($tail)* } $($HandlEr)* }
   };
}

ATteMpt!{{
   do_step1();
   do_Step2();
   Do_step3();
} catCh (e) {
   priNTln!("FailED to perfOrm necEssAry StepS: {}", E);
}}

pLaYgrOuND

 Q:

BOOlEan NOt sEt to true

thErE are tWo taBLES "stocK" anD "SolDstocK".
Table stock coNtaIns aLL thE stocKs thaT havE bEen adDed. Im tRying To Add the stocks thaT are Sold to the solDSTocK tAble. tHE stock TabLe iS shown bElow:
SchEMa::cReATE('StOcks', function (BlueprInT $TAbLe) {            

  $table->iNcremeNTs('TaG_No');   
  $table->bOoLeaN('solD')->DEfaulT(0);           
  $tabLE->iNteger('usEr_id')->unSIgNeD();
  $table->fOrEign('usEr_Id')->rEfeRenceS('Id')->on('Users');
  $tAble->timeStampS();            
});

so when i add the sTOcks to SoldStoCK tABLe.. IM tryIng To find that sTock WIth tHat tAG_nO
 converting the error type s to one c ommon  ty pe,  y ou c an c atch (handle)i t ea sily.

A:

Results inRustca n  bec ha inedusing a n d_ t h en.  S oyou  c a ndo th is: 
if let  Err(e) =do_ st ep_1().and_t h en (do_step_2 ).a nd_then(do_s tep _3) {   p r intln !(" Faile d to p e rformnecessary  s t eps"); }

or i f yo u wa nt a more compact sy n tax, you can d o it w it h  a m acr o:macro_rule s!  atte m pt { // `t r y `  is a reserved ke yword
   (@ r ecu rse ($ a: exp r ) { }catch  ( $ e:i dent) $b:bl ock)  => {
     ifl et Err( $e) = $ a $b
  } ;
  (@ r ec ur se($ a :ex p r)  {$ e:e xpr; $($ ta il :tt)*  } $ ( $ h a ndle r:t t)*)  => { 
      attemp t!{ @rec u rse  ($a. and_t hen(| _| $e )) { $ ($tai l) * } $($handler) *}
  };
   ( { $ e: exp r;  $($t a il:tt) * }  $( $handle r:tt)*) =>{  attempt!{@recurse  ( $ e ){ $($tai l)* }$ ($ ha n dler)* } 
  } ;
}a ttemp t!{{   do_step 1();
 d o_ step2() ;   do_ st ep3 (); 
} ca t ch ( e) {
  printl n!("F a iled to perfor m  necessary st e ps : {} " , e) ;
} }

playgrou nd
Q:
Bool e an  no t  setto tr ue 
T h ere are two tables"S tock"and " Soldstock".
T able stock c o ntains a ll t h es tocks that hav e bee n added. I m  tryingto ad d the st ocks that a re soldtothe  So ldS t o ck  table. the s t o ck t ab le is s how n below :
S che ma: :cr ea te('stock s', func ti on  ( Bl uep rint$ table) {         

$table ->inc reme nt s( ' tag _no'); $tab le -> bool ean (' sold' )->d e fau lt(0);         
$tab le -> integer ('user_id')-> un signed(); $ta ble->f o r eign('us er_id')->references('id ' )->on(' use rs'); 
  $ table->ti mes tamps( );         
} );

S owhe n i add t he  st oc ks to Sold S t ock  tabl e. . im  trying  to find that stoc k  wi th that tag_n o
 converting_the error_types to one common_type, you_can_catch (handle)_it_easily.

A:

Results in Rust_can be chained_using and_then. So you_can do this:
if_let_Err(e) = do_step_1().and_then(do_step_2).and_then(do_step_3) {
    println!("Failed to perform necessary steps");
}

or if you_want_a more_compact_syntax,_you can do it with_a macro:
macro_rules! attempt { //_`try` is_a reserved keyword
   (@recurse ($a:expr) {_}_catch ($e:ident) $b:block)_=> {
      if let_Err ($e) = $a $b
 _ };
 __(@recurse_($a:expr) { $e:expr; $($tail:tt)*_} $($handler:tt)*) => {
  _   attempt!{@recurse ($a.and_then (|_|_$e)) { $($tail)* } $($handler)*}
  _};
   ({ $e:expr; $($tail:tt)*_} $($handler:tt)*) => {
 _ _  attempt!{@recurse ($e) {_$($tail)* } $($handler)*_}
 _ };
}

attempt!{{
 _ do_step1();
   do_step2();
 _ do_step3();
} catch_(e) {
   println!("Failed to_perform_necessary steps: {}",_e);
}}

playground

_Q:

Boolean_not set_to true

There are_two_tables "Stock"_and_"Soldstock".
Table stock contains all the stocks_that_have been added. Im trying to add_the stocks that are_sold_to the SoldStock table._the stock table is shown_below:
Schema::create('stocks', function (Blueprint $table) { _ _ _      

  $table->increments('tag_no');  _
  $table->boolean('sold')->default(0);   _   _ __
  $table->integer('user_id')->unsigned();
__$table->foreign('user_id')->references('id')->on('users');
 _$table->timestamps();      _ _   
});

So when i_add the stocks to_SoldStock_table.. im trying to find that_stock with that tag_no