Execute Brain****/Elena: Difference between revisions
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<lang elena> |
<lang elena>import system'collections. |
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import system'routines. |
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import system'dynamic. |
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import extensions. |
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import extensions'scripting. |
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class BFTape |
class BFTape |
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{ |
{ |
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object thePointer. |
object thePointer. |
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object theBrackets. |
object theBrackets. |
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constructor new:aLength |
constructor new:aLength |
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[ |
[ |
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theArray := Array new:aLength |
theArray := Array new:aLength; populate(:n) [ Integer new:0 ]. |
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thePointer := Integer new:0. |
thePointer := Integer new:0. |
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theBrackets := Stack new. |
theBrackets := Stack new. |
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] |
] |
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append |
append |
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[ |
[ |
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theArray[thePointer] append:1. |
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] |
] |
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⚫ | |||
reduce |
reduce |
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[ |
[ |
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theArray[thePointer] reduce:1. |
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] |
] |
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next |
next |
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[ |
[ |
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thePointer |
thePointer append:1. |
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] |
] |
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previous |
previous |
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[ |
[ |
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thePointer |
thePointer reduce:1. |
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] |
] |
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push : bookmark |
push : bookmark |
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[ |
[ |
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theBrackets push:bookmark. |
theBrackets push:bookmark. |
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] |
] |
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pop |
pop |
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=> theBrackets. |
=> theBrackets. |
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input |
input |
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[ |
[ |
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theArray |
theArray[thePointer] := console readChar; toInt. |
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] |
] |
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output |
output |
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[ |
[ |
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console write |
console write(theArray[thePointer] toChar). |
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] |
] |
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check = theArray |
check = theArray[thePointer] != 0. |
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} |
} |
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⚫ | |||
⚫ | |||
program = |
program = |
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[ |
[ |
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console |
console |
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writeLine:bf_program. |
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⚫ | |||
var program := scriptEngine |
var program := scriptEngine |
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load |
load path:"rules.es"; |
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eval:bf_program. |
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⚫ | |||
program eval:(BFTape new:1024). |
program eval:(BFTape new:1024). |
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].</lang> |
].</lang> |
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The grammar: |
The grammar: |
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<lang elena>[[ |
<lang elena>[[ |
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[[ |
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#grammar transform |
#grammar transform |
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#grammar cf |
#grammar cf |
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#define start ::= <= ( > += " 2" += " %""system'dynamic'tapeOp. |
#define start ::= <= ( > += " 2" += " %""system'dynamic'tapeOp.tape_var[]""" => commands <= " *" "system'dynamic'Tape" "=" # ) =>; |
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#define commands ::= command commands; |
#define commands ::= command commands; |
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#define command ::= <= += " %""append[0]"" " => "+"; |
#define command ::= <= += " %""append[0]"" " => "+"; |
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#define command ::= <= += " %""reduce[0]"" " => "-"; |
#define command ::= <= += " %""reduce[0]"" " => "-"; |
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#define command ::= <= += " -2" += " %""system'dynamic'tapeOp. |
#define command ::= <= += " -2" += " %""system'dynamic'tapeOp.tape_ptr[]"" " += " 1" += " %""system'dynamic'tapeOp.tape_stack[]"" " += "%""push[1]"" " => "["; |
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+= "%""push[1]"" " => "["; |
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#define command ::= <= += " 0" += " %""system'dynamic'tapeOp.stack&args$[]"" " += " %""check[0]"" " += " 1" += " |
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#define comment ::= " " comments; |
#define comment ::= " " comments; |
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#mode symbolic; |
#mode symbolic; |
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]] |
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]]</lang> |
]]</lang> |
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{{out}} |
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<pre> |
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ELENA VM 3.2.15 (C)2005-2017 by Alex Rakov |
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Initializing... |
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Debug mode... |
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Done... |
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⚫ | |||
Hello World! |
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</pre> |