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Pygments / examplefiles / output / example.whiley
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SingleLinern†ro…rprq}rr(h	h
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j¹j¼h|jXhh°j?j©j>jAjIjLjZj]XTokenr¸j4hhhÙhÜubhhhÙhÜhÁhÄhÉhÌh<hµh$h¼ubh„h‡hDhGh$h'hthwhhh”h—hLhOhŒhhhh<h?hThWh4h7h,h/hlhoh\h_hœhŸhdhghhh¤h§h|hububXš/**
 * Example Whiley program, taken from the Whiley benchmark suite.
 * https://github.com/Whiley/WyBench/blob/master/src/101_interpreter/Main.whiley
 */r¹†rºjX

r»†r¼jíXimportr½†r¾jX r¿†rÀjXXwhileyrÁ†rÂj©X.rÆrÄjXXlangrņrÆj©jÆrÇjXXSystemrȆrÉjX
rʆrËjíXimportr̆rÍjj¿†rÎjXXwhileyrφrÐj©jÆrÑjXXlangrÒ†rÓj©jÆrÔjXXIntrÕ†rÖjjʆr×jíXimportr؆rÙjj¿†rÚjXXwhileyrÛ†rÜj©jÆrÝjXXiorÞ†rßj©jÆràjXXFilerá†râjjʆrãjíXimporträ†råjj¿†ræjXXstringrç†rèjj¿†réjíXfromrê†rëjj¿†rìjXXwhileyrí†rîj©jÆrïjXXlangrð†rñj©jÆròjXXASCIIró†rôjjʆrõjíXimportrö†r÷jj¿†røjXXcharrù†rújj¿†rûjíXfromrü†rýjj¿†rþjXXwhileyrÿ†rj©jÆrjXXlangr†rj©jÆrjXXASCIIr†rjX

r†rjiX7// ====================================================r	†r
jjʆrjiX&// A simple calculator for expressionsr†r
jjʆrjiX7// ====================================================r†rjX

r†rjüXconstantr†rjj¿†rjXXADDr†rjj¿†rjXisr†rjj¿†rjX0r†rjjʆrjüXconstantr†r jj¿†r!jXXSUBr"†r#jj¿†r$jXisr%†r&jj¿†r'jX1r(†r)jjʆr*jüXconstantr+†r,jj¿†r-jXXMULr.†r/jj¿†r0jXisr1†r2jj¿†r3jX2r4†r5jjʆr6jüXconstantr7†r8jj¿†r9jXXDIVr:†r;jj¿†r<jXisr=†r>jj¿†r?jX3r@†rAjX

rB†rCjiX// binary operationrD†rEjjʆrFjüXtyperG†rHjj¿†rIjXXBOprJ†rKjj¿†rLjXisrM†rNjj¿†rOj©X(rP†rQjÏXintrR†rSjj¿†rTjXXxrU†rVj©X)rW†rXjj¿†rYjXwhererZ†r[jj¿†r\jXXADDr]†r^jj¿†r_jAX<r`†rajAX=rb†rcjj¿†rdjXjU†rejj¿†rfjAX&rg†rhjAjg†rijj¿†rjjXjU†rkjj¿†rljAj`†rmjAjb†rnjj¿†rojXXDIVrp†rqjjʆrrjüXtypers†rtjj¿†rujXXBinOprv†rwjj¿†rxjXisry†rzjj¿†r{j©X{r|†r}jj¿†r~jXXBOpr†r€jj¿†rjXXopr‚†rƒj©X,r„†r…jj¿†r†jXXExprr‡†rˆjj¿†r‰jXXlhsrŠ†r‹j©j„†rŒjj¿†rjXXExprrŽ†rjj¿†rjXXrhsr‘†r’jj¿†r“j©X}r”†r•jX 

r–†r—jiX// variablesr˜†r™jjʆršjüXtyper›†rœjj¿†rjXXVarrž†rŸjj¿†r jXisr¡†r¢jj¿†r£j©j|†r¤jj¿†r¥jXXstringr¦†r§jj¿†r¨jXXidr©†rªjj¿†r«j©j”†r¬jX

r­†r®jiX// list accessr¯†r°jjʆr±jüXtyper²†r³jj¿†r´jXX
ListAccessrµ†r¶jj¿†r·jXisr¸†r¹jj¿†rºj©j|†r»jX 
    r¼†r½jXXExprr¾†r¿jj¿†rÀjXXsrcrÁ†rÂj©j„†rÃjX 
    rĆrÅjXXExprrƆrÇjj¿†rÈjXXindexrɆrÊjjʆrËj©j”†rÌjX 

r͆rÎjiX// expression treerφrÐjjʆrÑjüXtyperÒ†rÓjj¿†rÔjXXExprrÕ†rÖjj¿†r×jXisr؆rÙjj¿†rÚjÏXintrÛ†rÜjj¿†rÝjAX|rÞ†rßjX  rà†rájiX// constantrâ†rãjX
    rä†råjXXVarræ†rçjj¿†rèjAjÞ†réjX              rê†rëjiX// variablerì†ríjX
    rî†rïjXXBinOprð†rñjj¿†ròjAjÞ†rójX            rô†rõjiX// binary operatorrö†r÷jX
    rø†rùjXXExprrú†rûj©X[rü†rýj©X]rþ†rÿjj¿†rjAjÞ†rjX           r†rjiX// array constructorr†rjX
    r†rjXX
ListAccessr†r	jX	         r
†rjiX// list accessr†r
jX

r†rjiX	// valuesr†rjjʆrjüXtyper†rjj¿†rjXXValuer†rjj¿†rjXisr†rjj¿†rjÏXintr†rjj¿†rjAjÞ†rjj¿†r jXXValuer!†r"j©jü†r#j©jþ†r$jX

r%†r&jiX// stmtsr'†r(jjʆr)jüXtyper*†r+jj¿†r,jXXPrintr-†r.jj¿†r/jXisr0†r1jj¿†r2j©j|†r3jj¿†r4jXXExprr5†r6jj¿†r7jXXrhsr8†r9jj¿†r:j©j”†r;jjʆr<jüXtyper=†r>jj¿†r?jXXSetr@†rAjj¿†rBjXisrC†rDjj¿†rEj©j|†rFjj¿†rGjXXstringrH†rIjj¿†rJjXXlhsrK†rLj©j„†rMjj¿†rNjXXExprrO†rPjj¿†rQjXXrhsrR†rSjj¿†rTj©j”†rUjjʆrVjüXtyperW†rXjj¿†rYjXXStmtrZ†r[jj¿†r\jXisr]†r^jj¿†r_jXXPrintr`†rajj¿†rbjAjÞ†rcjj¿†rdjXXSetre†rfjX

rg†rhjiX7// ====================================================ri†rjjjʆrkjiX// Expression Evaluatorrl†rmjjʆrnjiX7// ====================================================ro†rpjX

rq†rrjüXtypers†rtjj¿†rujXXRuntimeErrorrv†rwjj¿†rxjXisry†rzjj¿†r{j©j|†r|jj¿†r}jXXstringr~†rjj¿†r€jXXmsgr†r‚jj¿†rƒj©j”†r„jjʆr…jüXtyper††r‡jj¿†rˆjXXEnvironmentr‰†rŠjj¿†r‹jXisrŒ†rjj¿†rŽj©jü†rj©j|†rjXXstringr‘†r’jj¿†r“jXXkr”†r•j©j„†r–jj¿†r—jXXValuer˜†r™jj¿†ršjXXvr›†rœj©j”†rj©jþ†ržjX

rŸ†r jiXE// Evaluate an expression in a given environment reducing either to ar¡†r¢jjʆr£jiXC// value, or a runtime error.  The latter occurs if evaluation getsr¤†r¥jjʆr¦jiX2// "stuck" (e.g. expression is // not well-formed)r§†r¨jjʆr©jüXfunctionrª†r«jj¿†r¬jXXevaluater­†r®j©jP†r¯jXXExprr°†r±jj¿†r²jXXer³†r´j©j„†rµjj¿†r¶jXXEnvironmentr·†r¸jj¿†r¹jXXenvrº†r»j©jW†r¼jj¿†r½jAX-r¾†r¿jAX>rÀ†rÁjj¿†rÂjXXValuerÆrÄjj¿†rÅjAjÞ†rÆjj¿†rÇjXXRuntimeErrorrȆrÉjAX:rʆrËjX
    r̆rÍjiX//rΆrÏjX
    rІrÑjXifrÒ†rÓjj¿†rÔjXj³†rÕjj¿†rÖjXisr׆rØjj¿†rÙjÏXintrÚ†rÛjAjʆrÜjX	
        r݆rÞjXreturnr߆ràjj¿†rájXj³†râjX
    rã†räjXelserå†ræjj¿†rçjXifrè†réjj¿†rêjXj³†rëjj¿†rìjXisrí†rîjj¿†rïjXXVarrð†rñjAjʆròjX	
        ró†rôjXreturnrõ†röjj¿†r÷jXXenvrø†rùj©jü†rújXj³†rûj©jÆrüjXXidrý†rþj©jþ†rÿjX
    r†rjXelser†rjj¿†rjXifr†rjj¿†rjXj³†rjj¿†r	jXisr
†rjj¿†rjXXBinOpr
†rjAjʆrjX	
        r†rjXXValuer†rjAjÞ†rjXXRuntimeErrorr†rjj¿†rjXXlhsr†rjj¿†rjAjb†rjj¿†rjXXevaluater†rj©jP†rjXj³†r j©jÆr!jXXlhsr"†r#j©j„†r$jj¿†r%jXXenvr&†r'j©jW†r(jX	
        r)†r*jXXValuer+†r,jAjÞ†r-jXXRuntimeErrorr.†r/jj¿†r0jXXrhsr1†r2jj¿†r3jAjb†r4jj¿†r5jXXevaluater6†r7j©jP†r8jXj³†r9j©jÆr:jXXrhsr;†r<j©j„†r=jj¿†r>jXXenvr?†r@j©jW†rAjX	
        rB†rCjiX// check if stuckrD†rEjX	
        rF†rGjXifrH†rIjj¿†rJjAX!rK†rLj©jP†rMjXXlhsrN†rOjj¿†rPjXisrQ†rRjj¿†rSjÏXintrT†rUjj¿†rVjAjg†rWjAjg†rXjj¿†rYjXXrhsrZ†r[jj¿†r\jXisr]†r^jj¿†r_jÏXintr`†raj©jW†rbjAjʆrcjX

            rd†rejXreturnrf†rgjj¿†rhj©j|†rijXXmsgrj†rkjAjʆrljj¿†rmhX"rn†rohX)arithmetic attempted on non-numeric valuerp†rqhjn†rrj©j”†rsjX	
        rt†rujiX!// switch statement would be goodrv†rwjX	
        rx†ryjXifrz†r{jj¿†r|jXj³†r}j©jÆr~jXXopr†r€jj¿†rjAjb†r‚jAjb†rƒjj¿†r„jXXADDr…†r†jAjʆr‡jX

            rˆ†r‰jXreturnrŠ†r‹jj¿†rŒjXXlhsr†rŽjj¿†rjAX+r†r‘jj¿†r’jXXrhsr“†r”jX	
        r•†r–jXelser—†r˜jj¿†r™jXifrš†r›jj¿†rœjXj³†rj©jÆržjXXoprŸ†r jj¿†r¡jAjb†r¢jAjb†r£jj¿†r¤jXXSUBr¥†r¦jAjʆr§jX

            r¨†r©jXreturnrª†r«jj¿†r¬jXXlhsr­†r®jj¿†r¯jAj¾†r°jj¿†r±jXXrhsr²†r³jX	
        r´†rµjXelser¶†r·jj¿†r¸jXifr¹†rºjj¿†r»jXj³†r¼j©jÆr½jXXopr¾†r¿jj¿†rÀjAjb†rÁjAjb†rÂjj¿†rÃjXXMULrĆrÅjAjʆrÆjX

            rdžrÈjXreturnrɆrÊjj¿†rËjXXlhsr̆rÍjj¿†rÎjAX*rφrÐjj¿†rÑjXXrhsrÒ†rÓjX	
        rÔ†rÕjXelserÖ†r×jj¿†rØjXifrÙ†rÚjj¿†rÛjXXrhsr܆rÝjj¿†rÞjAjK†rßjAjb†ràjj¿†rájj†râjAjʆrãjX

            rä†råjXreturnræ†rçjj¿†rèjXXlhsré†rêjj¿†rëjAX/rì†ríjj¿†rîjXXrhsrï†rðjX	
        rñ†ròjXreturnró†rôjj¿†rõj©j|†röjXXmsgr÷†røjAjʆrùjj¿†rúhjn†rûhXdivide-by-zerorü†rýhjn†rþj©j”†rÿjX
    r†rjXelser†rjj¿†rjXifr†rjj¿†rjXj³†rjj¿†r	jXisr
†rjj¿†rjXXExprr
†rj©jü†rj©jþ†rjAjʆrjX	
        r†rj©jü†rjXXValuer†rj©jþ†rjj¿†rjXXrr†rjj¿†rjAjb†rjj¿†rj©jü†rj©jþ†rjX	
        r †r!jXforr"†r#jj¿†r$jXXir%†r&jj¿†r'jXinr(†r)jj¿†r*jXj³†r+jAjʆr,jX

            r-†r.jXXValuer/†r0jAjÞ†r1jXXRuntimeErrorr2†r3jj¿†r4jXj›†r5jj¿†r6jAjb†r7jj¿†r8jXXevaluater9†r:j©jP†r;jXj%†r<j©j„†r=jj¿†r>jXXenvr?†r@j©jW†rAjX

            rB†rCjXifrD†rEjj¿†rFjXj›†rGjj¿†rHjXisrI†rJjj¿†rKjXXRuntimeErrorrL†rMjAjʆrNjX
                rO†rPjXreturnrQ†rRjj¿†rSjXj›†rTjX

            rU†rVjXelserW†rXjAjʆrYjX
                rZ†r[jXj†r\jj¿†r]jAjb†r^jj¿†r_jXj†r`jj¿†rajAj†rbjAj†rcjj¿†rdj©jü†rejXj›†rfj©jþ†rgjX	
        rh†rijXreturnrj†rkjj¿†rljXj†rmjX
    rn†rojXelserp†rqjj¿†rrjXifrs†rtjj¿†rujXj³†rvjj¿†rwjXisrx†ryjj¿†rzjXX
ListAccessr{†r|jAjʆr}jX	
        r~†rjXXValuer€†rjAjÞ†r‚jXXRuntimeErrorrƒ†r„jj¿†r…jXXsrcr††r‡jj¿†rˆjAjb†r‰jj¿†rŠjXXevaluater‹†rŒj©jP†rjXj³†rŽj©jÆrjXXsrcr†r‘j©j„†r’jj¿†r“jXXenvr”†r•j©jW†r–jX	
        r—†r˜jXXValuer™†ršjAjÞ†r›jXXRuntimeErrorrœ†rjj¿†ržjXXindexrŸ†r jj¿†r¡jAjb†r¢jj¿†r£jXXevaluater¤†r¥j©jP†r¦jXj³†r§j©jÆr¨jXXindexr©†rªj©j„†r«jj¿†r¬jXXenvr­†r®j©jW†r¯jX	
        r°†r±jiX// santity checksr²†r³jX	
        r´†rµjXifr¶†r·jj¿†r¸jXXsrcr¹†rºjj¿†r»jXisr¼†r½jj¿†r¾j©jü†r¿jXXValuerÀ†rÁj©jþ†rÂjj¿†rÃjAjg†rÄjAjg†rÅjj¿†rÆjXXindexrdžrÈjj¿†rÉjXisrʆrËjj¿†rÌjÏXintr͆rÎjj¿†rÏjAjg†rÐjAjg†rÑjj¿†rÒjXXindexrÓ†rÔjj¿†rÕjAjÀ†rÖjAjb†r×jj¿†rØjj†rÙjj¿†rÚjAjg†rÛjAjg†rÜjj¿†rÝjXXindexrÞ†rßjj¿†ràjAj`†rájj¿†râjAjÞ†rãjXXsrcrä†råjAjÞ†ræjAjʆrçjX

            rè†réjXreturnrê†rëjj¿†rìjXXsrcrí†rîj©jü†rïjXXindexrð†rñj©jþ†ròjX	
        ró†rôjXelserõ†röjAjʆr÷jX

            rø†rùjXreturnrú†rûjj¿†rüj©j|†rýjXXmsgrþ†rÿjAjʆrjj¿†rhjn†rhXinvalid list accessr†rhjn†rj©j”†rjX
    r†rjXelser	†r
jAjʆrjX	
        r†r
jXreturnr†rjj¿†rjj†rjj¿†rjiX// dead-coder†rjX

r†rjiX7// ====================================================r†rjjʆrjiX// Expression Parserr†rjjʆrjiX7// ====================================================r†rjX

r†r jüXtyper!†r"jj¿†r#jXXStater$†r%jj¿†r&jXisr'†r(jj¿†r)j©j|†r*jj¿†r+jXXstringr,†r-jj¿†r.jXXinputr/†r0j©j„†r1jj¿†r2jÏXintr3†r4jj¿†r5jXXposr6†r7jj¿†r8j©j”†r9jjʆr:jüXtyper;†r<jj¿†r=jXXSyntaxErrorr>†r?jj¿†r@jXisrA†rBjj¿†rCj©j|†rDjj¿†rEjXXstringrF†rGjj¿†rHjXXmsgrI†rJj©j„†rKjj¿†rLjÏXintrM†rNjj¿†rOjXXstartrP†rQj©j„†rRjj¿†rSjÏXintrT†rUjj¿†rVjXXendrW†rXjj¿†rYj©j”†rZjX

r[†r\jüXfunctionr]†r^jj¿†r_jXXSyntaxErrorr`†raj©jP†rbjXXstringrc†rdjj¿†rejXXmsgrf†rgj©j„†rhjj¿†rijÏXintrj†rkjj¿†rljXXstartrm†rnj©j„†rojj¿†rpjÏXintrq†rrjj¿†rsjXXendrt†ruj©jW†rvjj¿†rwjAj¾†rxjAjÀ†ryjj¿†rzjXXSyntaxErrorr{†r|jAjʆr}jX
    r~†rjXreturnr€†rjj¿†r‚j©j|†rƒjj¿†r„jXXmsgr…†r†jAjʆr‡jj¿†rˆjXXmsgr‰†rŠj©j„†r‹jj¿†rŒjXXstartr†rŽjAjʆrjj¿†rjXXstartr‘†r’j©j„†r“jj¿†r”jXXendr•†r–jAjʆr—jj¿†r˜jXXendr™†ršjj¿†r›j©j”†rœjX

r†ržjiX// Top-level parse methodrŸ†r jjʆr¡jüXfunctionr¢†r£jj¿†r¤jXXparser¥†r¦j©jP†r§jXXStater¨†r©jj¿†rªjXXstr«†r¬j©jW†r­jj¿†r®jAj¾†r¯jAjÀ†r°jj¿†r±j©jP†r²jXXStmtr³†r´j©j„†rµjXXStater¶†r·j©jW†r¸jAjÞ†r¹jXXSyntaxErrorrº†r»jAjʆr¼jX
    r½†r¾jiX//r¿†rÀjX
    rÁ†rÂjXXVarrÆrÄjj¿†rÅjXXkeywordrƆrÇj©j„†rÈjj¿†rÉjXXVarrʆrËjj¿†rÌjXj›†rÍjX
    rΆrÏjXXExprrІrÑjj¿†rÒjXj³†rÓjX
    rÔ†rÕjÏXintrÖ†r×jj¿†rØjXXstartrÙ†rÚjj¿†rÛjAjb†rÜjj¿†rÝjXXstrÞ†rßj©jÆràjXXposrá†râjX
    rã†räjiX//rå†ræjX
    rç†rèjXXkeywordré†rêj©j„†rëjXXstrì†ríjj¿†rîjAjb†rïjj¿†rðjXXparseIdentifierrñ†ròj©jP†rójXXstrô†rõj©jW†röjX
    r÷†røjXswitchrù†rújj¿†rûjXXkeywordrü†rýj©jÆrþjXXidrÿ†r	jAjʆr	jX	
        r	†r	jXcaser	†r	jj¿†r	hjn†r	hXprintr	†r		hjn†r
	jAjʆr	jX

            r	†r
	jÏXanyr	†r	jj¿†r	jXj†r	jj¿†r	jAjb†r	jj¿†r	jXXparseAddSubExprr	†r	j©jP†r	jXXstr	†r	j©jW†r	jX

            r	†r	jXifr	†r	jj¿†r	jAjK†r 	j©jP†r!	jXj†r"	jj¿†r#	jXisr$	†r%	jj¿†r&	jXXSyntaxErrorr'	†r(	j©jW†r)	jAjʆr*	jX
                r+	†r,	jXj³†r-	j©j„†r.	jXXstr/	†r0	jj¿†r1	jAjb†r2	jj¿†r3	jXj†r4	jX
                r5	†r6	jXreturnr7	†r8	jj¿†r9	j©j|†r:	jXXrhsr;	†r<	jAjʆr=	jj¿†r>	jXj³†r?	j©j”†r@	j©j„†rA	jXXstrB	†rC	jX

            rD	†rE	jXelserF	†rG	jAjʆrH	jX
                rI	†rJ	jXreturnrK	†rL	jj¿†rM	jXj†rN	jj¿†rO	jiX
// error caserP	†rQ	jX	
        rR	†rS	jXcaserT	†rU	jj¿†rV	hjn†rW	hXsetrX	†rY	hjn†rZ	jAjʆr[	jX

            r\	†r]	jXXstr^	†r_	jj¿†r`	jAjb†ra	e(jj¿†rb	jXXparseWhiteSpacerc	†rd	j©jP†re	jXXstrf	†rg	j©jW†rh	jX

            ri	†rj	jXj›†rk	j©j„†rl	jXXstrm	†rn	jj¿†ro	jAjb†rp	jj¿†rq	jXXparseIdentifierrr	†rs	j©jP†rt	jXXstru	†rv	j©jW†rw	jX

            rx	†ry	jÏXanyrz	†r{	jj¿†r|	jXj†r}	jj¿†r~	jAjb†r	jj¿†r€	jXXparseAddSubExprr	†r‚	j©jP†rƒ	jXXstr„	†r…	j©jW†r†	jX

            r‡	†rˆ	jXifr‰	†rŠ	jj¿†r‹	jAjK†rŒ	j©jP†r	jXj†rŽ	jj¿†r	jXisr	†r‘	jj¿†r’	jXXSyntaxErrorr“	†r”	j©jW†r•	jAjʆr–	jX
                r—	†r˜	jXj³†r™	j©j„†rš	jXXstr›	†rœ	jj¿†r	jAjb†rž	jj¿†rŸ	jXj†r 	jX
                r¡	†r¢	jXreturnr£	†r¤	jj¿†r¥	j©j|†r¦	jXXlhsr§	†r¨	jAjʆr©	jj¿†rª	jXj›†r«	j©jÆr¬	jXXidr­	†r®	j©j„†r¯	jj¿†r°	jXXrhsr±	†r²	jAjʆr³	jj¿†r´	jXj³†rµ	j©j”†r¶	j©j„†r·	jXXstr¸	†r¹	jX

            rº	†r»	jXelser¼	†r½	jAjʆr¾	jX
                r¿	†rÀ	jXreturnrÁ	†rÂ	jj¿†rÃ	jXj†rÄ	jj¿†rÅ	jiX
// error caserÆ	†rÇ	jX	
        rÈ	†rÉ	jXdefaultrÊ	†rË	jAjʆrÌ	jX

            rÍ	†rÎ	jXreturnrÏ	†rÐ	jj¿†rÑ	jXXSyntaxErrorrÒ	†rÓ	j©jP†rÔ	hjn†rÕ	hXunknown statementrÖ	†r×	hjn†rØ	j©j„†rÙ	jXXstartrÚ	†rÛ	j©j„†rÜ	jXXstrÝ	†rÞ	j©jÆrß	jXXposrà	†rá	jAj¾†râ	jj(†rã	j©jW†rä	jX

rå	†ræ	jüXfunctionrç	†rè	jj¿†ré	jXXparseAddSubExprrê	†rë	j©jP†rì	jXXStaterí	†rî	jj¿†rï	jXXstrð	†rñ	j©jW†rò	jj¿†ró	jAj¾†rô	jAjÀ†rõ	jj¿†rö	j©jP†r÷	jXXExprrø	†rù	j©j„†rú	jj¿†rû	jXXStaterü	†rý	j©jW†rþ	jAjÞ†rÿ	jXXSyntaxErrorr
†r
jAjʆr
jX	    
    r
†r
jiX//r
†r
jX
    r
†r
jXXExprr	
†r

jj¿†r
jXXlhsr
†r
j©j„†r
jj¿†r
jXXExprr
†r
jj¿†r
jXXrhsr
†r
jX      
    r
†r
jiX// First, pass left-hand side r
†r
jX
    r
†r
jÏXanyr
†r
jj¿†r
jXj†r
jX  r
†r 
jAjb†r!
jj¿†r"
jXXparseMulDivExprr#
†r$
j©jP†r%
jXXstr&
†r'
j©jW†r(
jX
    r)
†r*
jiX//r+
†r,
jX
    r-
†r.
jXifr/
†r0
jj¿†r1
jXj†r2
jj¿†r3
jXisr4
†r5
jj¿†r6
jXXSyntaxErrorr7
†r8
jAjʆr9
jX	
        r:
†r;
jXreturnr<
†r=
jj¿†r>
jXj†r?
jX
    r@
†rA
jiX//    rB
†rC
jX
    rD
†rE
jXXlhsrF
†rG
j©j„†rH
jXXstrI
†rJ
jj¿†rK
jAjb†rL
jj¿†rM
jXj†rN
jX
    rO
†rP
jXXstrQ
†rR
jj¿†rS
jAjb†rT
jj¿†rU
jXXparseWhiteSpacerV
†rW
j©jP†rX
jXXstrY
†rZ
j©jW†r[
jX
    r\
†r]
jiX,// Second, see if there is a right-hand sider^
†r_
jX
    r`
†ra
jXifrb
†rc
jj¿†rd
jXXstre
†rf
j©jÆrg
jXXposrh
†ri
jj¿†rj
jAj`†rk
jj¿†rl
jAjކrm
jXXstrn
†ro
j©jÆrp
jXXinputrq
†rr
jAjކrs
jj¿†rt
jAjg†ru
jAjg†rv
jj¿†rw
jXXstrx
†ry
j©jÆrz
jXXinputr{
†r|
j©jü†r}
jXXstr~
†r
j©jÆr€
jXXposr
†r‚
j©jþ†rƒ
jj¿†r„
jAjb†r…
jAjb†r†
jj¿†r‡
h'X'+'rˆ
†r‰
jAjʆrŠ
jX	
        r‹
†rŒ
jiX// add expressionr
†rŽ
jX	
        r
†r
jXXstr‘
†r’
j©jÆr“
jXXposr”
†r•
jj¿†r–
jAjb†r—
jj¿†r˜
jXXstr™
†rš
j©jÆr›
jXXposrœ
†r
jj¿†rž
jAj†rŸ
jj¿†r 
jj(†r¡
jX	
        r¢
†r£
jXj†r¤
jj¿†r¥
jAjb†r¦
jj¿†r§
jXXparseAddSubExprr¨
†r©
j©jP†rª
jXXstr«
†r¬
j©jW†r­
jX        
        r®
†r¯
jXifr°
†r±
jj¿†r²
jAjK†r³
j©jP†r´
jXj†rµ
jj¿†r¶
jXisr·
†r¸
jj¿†r¹
jXXSyntaxErrorrº
†r»
j©jW†r¼
jAjʆr½
jX

            r¾
†r¿
jXXrhsrÀ
†rÁ
j©j„†rÂ
jXXstrÃ
†rÄ
jj¿†rÅ
jAjb†rÆ
jj¿†rÇ
jXj†rÈ
jX

            rÉ
†rÊ
jXreturnrË
†rÌ
jj¿†rÍ
j©j|†rÎ
jXXoprÏ
†rÐ
jAjʆrÑ
jj¿†rÒ
jXXADDrÓ
†rÔ
j©j„†rÕ
jj¿†rÖ
jXXlhsr×
†rØ
jAjʆrÙ
jj¿†rÚ
jXXlhsrÛ
†rÜ
j©j„†rÝ
jj¿†rÞ
jXXrhsrß
†rà
jAjʆrá
jj¿†râ
jXXrhsrã
†rä
j©j”†rå
j©j„†ræ
jXXstrç
†rè
jX	
        ré
†rê
jXelserë
†rì
jAjʆrí
jX

            rî
†rï
jXreturnrð
†rñ
jj¿†rò
jXj†ró
jX
    rô
†rõ
jXelserö
†r÷
jj¿†rø
jXifrù
†rú
jj¿†rû
jXXstrü
†rý
j©jÆrþ
jXXposrÿ
†rjj¿†rjAj`†rjj¿†rjAjÞ†rjXXstr†rj©jÆrjXXinputr†r	jAjÞ†r
jj¿†rjAjg†rjAjg†r
jj¿†rjXXstr†rj©jÆrjXXinputr†rj©jü†rjXXstr†rj©jÆrjXXposr†rj©jþ†rjj¿†rjAjb†rjAjb†rjj¿†rh'X'-'r†r jAjʆr!jX	
        r"†r#jiX// subtract expressionr$†r%jX	
        r&†r'jXXstr(†r)j©jÆr*jXXposr+†r,jj¿†r-jAjb†r.jj¿†r/jXXstr0†r1j©jÆr2jXXposr3†r4jj¿†r5jAj†r6jj¿†r7jj(†r8jX	
        r9†r:jXj†r;jj¿†r<jAjb†r=jj¿†r>jXXparseAddSubExprr?†r@j©jP†rAjXXstrB†rCj©jW†rDjX        
        rE†rFjXifrG†rHjj¿†rIjAjK†rJj©jP†rKjXj†rLjj¿†rMjXisrN†rOjj¿†rPjXXSyntaxErrorrQ†rRj©jW†rSjAjʆrTjX

            rU†rVjXXrhsrW†rXj©j„†rYjXXstrZ†r[jj¿†r\jAjb†r]jj¿†r^jXj†r_jX

            r`†rajXreturnrb†rcjj¿†rdj©j|†rejXXoprf†rgjAjʆrhjj¿†rijXXSUBrj†rkj©j„†rljj¿†rmjXXlhsrn†rojAjʆrpjj¿†rqjXXlhsrr†rsj©j„†rtjj¿†rujXXrhsrv†rwjAjʆrxjj¿†ryjXXrhsrz†r{j©j”†r|j©j„†r}jXXstr~†rjX	
        r€†rjXelser‚†rƒjAjʆr„jX

            r…†r†jXreturnr‡†rˆjj¿†r‰jXj†rŠjX	    
    r‹†rŒjiX// No right-hand sider†rŽjX
    r†rjXreturnr‘†r’jj¿†r“j©jP†r”jXXlhsr•†r–j©j„†r—jXXstr˜†r™j©jW†ršjX

r›†rœjüXfunctionr†ržjj¿†rŸjXXparseMulDivExprr †r¡j©jP†r¢jXXStater£†r¤jj¿†r¥jXXstr¦†r§j©jW†r¨jj¿†r©jAj¾†rªjAjÀ†r«jj¿†r¬j©jP†r­jXXExprr®†r¯j©j„†r°jj¿†r±jXXStater²†r³j©jW†r´jAjÞ†rµjXXSyntaxErrorr¶†r·jAjʆr¸jX	    
    r¹†rºjiX// First, parse left-hand sider»†r¼jX
    r½†r¾jXXExprr¿†rÀjj¿†rÁjXXlhsr†rÃj©j„†rÄjj¿†rÅjXXExprrƆrÇjj¿†rÈjXXrhsrɆrÊjX
    rˆrÌjÏXanyr͆rÎjj¿†rÏjXj†rÐjX  rцrÒjAjb†rÓjj¿†rÔjXX	parseTermrÕ†rÖj©jP†r×jXXstr؆rÙj©jW†rÚjX
    rÛ†rÜjXifr݆rÞjj¿†rßjXj†ràjj¿†rájXisrâ†rãjj¿†räjXXSyntaxErrorrå†ræjAjʆrçjX	
        rè†réjXreturnrê†rëjj¿†rìjXj†ríjX
    rî†rïjiX//rð†rñjX
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        r9†r:jiX// add expressionr;†r<jX	
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        rÑ†rÒjiX// subtract expressionrÓ†rÔjX	
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        rè†réjXj†rêjj¿†rëjAjb†rìjj¿†ríjXXparseMulDivExprrî†rïj©jP†rðjXXstrñ†ròj©jW†rójX        
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    r†rjiX//r†rjX
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    r8†r9jiX//r:†r;jX
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    rt†rujXelserv†rwjAjʆrxjX	
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    r¢†r£jiX//r¤†r¥jX
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        rI†rJjXelserK†rLjj¿†rMjXifrN†rOjj¿†rPjAjK†rQjXX	firstTimerR†rSjAjʆrTjX

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            r«†r¬jiX#// perform annoying error check    r­†r®jX

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