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![:ﺃﻭﻻ: ﺍﻟﺘﺤﻠﻴﻞ ﺍﻟﻤﻔﺮﺩﺍﺗﻲ
:ﺃﻣﻮﺭ ﻣﻤﻴﺰﺓ ﺗﻢ ﻣﻌﺎﻟﺠﺘﻬﺎ ﻓﻲ ﺍﻟﺘﻌﺮﻑ ﻋﻠﻰ ﻣﻔﺮﺩﺍﺕ ﺍﻟﻠﻐﺔ
●ﺍﻟﺘﻌﺮﻑ ﻋﻠﻰ ﺍﻷﻧﻤﺎﻁ ﺍﻟﺘﺎﻟﻴﺔ
octinteger "0"("o"|"O"){octdigit}+|"0"{octdigit}+
octdigit [07]
hexinteger "0"("x"|"X"){hexdigit}+
hexdigit {digit}|[af]|[AF]
digit [09]
bininteger "0"("b"|"B"){bindigit}+
bindigit "0"|"1"
●multilinecomment ﺍﻟﺘﻌﺮﻑ ﻋﻠﻰ ﺍﻟﺘﻌﻠﻴﻘﺎﺕ ﺍﻟﻤﺘﻌﺪﺩﺓ ﺍﻷﺳﻄﺮ
%option c++
%x multilinecomment
"/*" {colNum+=2; BEGIN(multilinecomment);}
<multilinecomment>"n" {lineNum+=1; BEGIN(multilinecomment);}
<multilinecomment>"*"*[^"/"] {colNum+=strlen(yytext); }
<multilinecomment>[^"*"]* {colNum+=strlen(yytext); }
<multilinecomment>"*"+"/" {colNum+=strlen(yytext); BEGIN(INITIAL);}
●:(EOF Pattern) ﻓﻲ ﺇﻧﻬﺎء ﺍﻟﻤﻠﻒ EOF ﺍﺳﺘﺨﺪﺍﻡ ﺍﻟﻨﻤﻂ
<<EOF>> {return END_OF_FILE;}
ﻣﻨﻪ ﻭﻣﻠﻒ ﺁﺧﺮ ﻟﻄﺒﺎﻋﺔ ﺍﻟﻘﻮﺍﻋﺪ ﻭﺍﻷﺧﻄﺎء ﺍﻟﺤﺎﺻﻠﺔ ﻋﻠﻴﻪ ﺗﺴﻬﻴﻼcode ﺣﻴﺚ ﻗﻤﻨﺎ ﺑﺎﺳﺘﺨﺪﺍﻡ ﻣﻠﻒ ﻟﻘﺮﺍءﺓ ﺍﻟـ
.ﻟﻠﻌﻤﻞ
:ﺍﻷﺧﻄﺎء ﺍﻟﻤﻌﺎﻟﺠﺔ ﻓﻲ ﺍﻟﻘﻮﺍﻋﺪ
●: ﻭﺍﻟﺘﻲ ﻫﻲsimple_stmt_list ﻏﻴﺎﺏ ﺍﻟﻔﺎﺻﻠﺔ ﺍﻟﻤﻨﻘﻮﻃﺔ ﻓﻲ ﻧﻬﺎﻳﺔ ﻛﻞ ﺗﻌﻠﻴﻤﺔ ﻣﻦ ﺗﻌﻠﻴﻤﺎﺕ
expr_list error
assert_stmt error
assignment_stmt error
PASS error
del_stmt error
1](https://image.slidesharecdn.com/b19ab31a-c604-4c58-a704-ea90ca0d2961-150614070359-lva1-app6892/75/python-compiler-project-1-2048.jpg)
python compiler project
- 1. :ﺃﻭﻻ: ﺍﻟﺘﺤﻠﻴﻞ ﺍﻟﻤﻔﺮﺩﺍﺗﻲ :ﺃﻣﻮﺭ ﻣﻤﻴﺰﺓ ﺗﻢ ﻣﻌﺎﻟﺠﺘﻬﺎ ﻓﻲ ﺍﻟﺘﻌﺮﻑ ﻋﻠﻰ ﻣﻔﺮﺩﺍﺕ ﺍﻟﻠﻐﺔ ●ﺍﻟﺘﻌﺮﻑ ﻋﻠﻰ ﺍﻷﻧﻤﺎﻁ ﺍﻟﺘﺎﻟﻴﺔ octinteger "0"("o"|"O"){octdigit}+|"0"{octdigit}+ octdigit [07] hexinteger "0"("x"|"X"){hexdigit}+ hexdigit {digit}|[af]|[AF] digit [09] bininteger "0"("b"|"B"){bindigit}+ bindigit "0"|"1" ●multilinecomment ﺍﻟﺘﻌﺮﻑ ﻋﻠﻰ ﺍﻟﺘﻌﻠﻴﻘﺎﺕ ﺍﻟﻤﺘﻌﺪﺩﺓ ﺍﻷﺳﻄﺮ %option c++ %x multilinecomment "/*" {colNum+=2; BEGIN(multilinecomment);} <multilinecomment>"n" {lineNum+=1; BEGIN(multilinecomment);} <multilinecomment>"*"*[^"/"] {colNum+=strlen(yytext); } <multilinecomment>[^"*"]* {colNum+=strlen(yytext); } <multilinecomment>"*"+"/" {colNum+=strlen(yytext); BEGIN(INITIAL);} ●:(EOF Pattern) ﻓﻲ ﺇﻧﻬﺎء ﺍﻟﻤﻠﻒ EOF ﺍﺳﺘﺨﺪﺍﻡ ﺍﻟﻨﻤﻂ <<EOF>> {return END_OF_FILE;} ﻣﻨﻪ ﻭﻣﻠﻒ ﺁﺧﺮ ﻟﻄﺒﺎﻋﺔ ﺍﻟﻘﻮﺍﻋﺪ ﻭﺍﻷﺧﻄﺎء ﺍﻟﺤﺎﺻﻠﺔ ﻋﻠﻴﻪ ﺗﺴﻬﻴﻼcode ﺣﻴﺚ ﻗﻤﻨﺎ ﺑﺎﺳﺘﺨﺪﺍﻡ ﻣﻠﻒ ﻟﻘﺮﺍءﺓ ﺍﻟـ .ﻟﻠﻌﻤﻞ :ﺍﻷﺧﻄﺎء ﺍﻟﻤﻌﺎﻟﺠﺔ ﻓﻲ ﺍﻟﻘﻮﺍﻋﺪ ●: ﻭﺍﻟﺘﻲ ﻫﻲsimple_stmt_list ﻏﻴﺎﺏ ﺍﻟﻔﺎﺻﻠﺔ ﺍﻟﻤﻨﻘﻮﻃﺔ ﻓﻲ ﻧﻬﺎﻳﺔ ﻛﻞ ﺗﻌﻠﻴﻤﺔ ﻣﻦ ﺗﻌﻠﻴﻤﺎﺕ expr_list error assert_stmt error assignment_stmt error PASS error del_stmt error 1
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- 4. ●raise ﺧﻄﺄ ﻓﻲ ﻛﺘﺎﺑﺔ ﺍﻟﻜﻠﻤﺔ ﺍﻟﻤﺤﺠﻮﺯ ID error expr COMMA expr ●parenth_form ﻋﺪﻡ ﻭﺭﻭﺩ ﻗﻮﺱ ﻓﺎﺗﺢ ﻓﻲ ﺍﻟـ error expr_list CLOSE_S ●parenth_form ﻋﺪﻡ ﻭﺭﻭﺩ ﻗﻮﺱ ﻏﺎﻟﻖ ﻓﻲ ﺍﻟـ OPEN_S expr_list error ﻣﻼﺣﻈﺔ: ﺗﻢ ﻣﻌﺎﻟﺠﺔ ﺍﻷﺧﻄﺎء ﺍﻟﺨﺎﺻﺔ ﺑﺘﺮﻭﻳﺴﺔ ﺍﻟﺼﻒ ﻓﻘﻂ ﻓﻲ ﺣﺎﻟﺔ ﻋﺪﻡ ﻭﺭﻭﺩ ﻭﺍﺻﻔﺎﺕ ﺗﺨﺰﻳﻦ ﺃﻭ ﻭﺍﺻﻔﺎﺕ ﺣﻴﺚ ﺳﻴﺆﺩﻱ ﻣﻌﺎﻟﺠﺔ ﻫﺬﺍ ﺍﻟﺨﻄﺄ ﻣﻦ ﺃﺟﻞ ﺟﻤﻴﻊ ﺗﺒﺎﺩﻳﻞ ﻭﺍﺻﻔﺎﺕ ﺍﻟﺮﺅﺋﻴﺔ class ﺭﻭﺋﻴﺔ ﻗﺒﻞ ﺍﻟﻜﻠﻤﺔ ﺍﻟﻤﺤﺠﻮﺯ .ﻭﺍﻟﺘﺨﺰﻳﻦ ﺇﻟﻰ ﺗﻀﺨﻢ ﻛﺒﻴﺮ ﻓﻲ ﺍﻟﻘﻮﺍﻋﺪ ﺣﻴﺚ ﻳﻤﻜﻦ ﺍﺳﺘﺨﺪﺍﻣﻪ bison ﺍﻟﻤﻌﺮﻑ ﻣﻦ ﻗﺒﻞ ﺃﺩﺍﺓ token error ﺍﺳﺘﺨﺪﻡ ﻓﻲ ﻣﻌﺎﻟﺠﺔ ﻛﻞ ﻫﺬﻩ ﺍﻷﺧﻄﺎء ﺍﻟـ ﺇﻟﻰ input tokens ﻓﻲ ﺍﻟﻘﻮﺍﻋﺪ ﻟﻴﻌﻮﺽ ﻏﻴﺎﺏ ﺃﺟﺰﺍء ﺍﻟﻘﺎﻋﺪﺓ ﺍﻟﺘﻲ ﺳﺒﺒﺖ ﺣﺪﻭﺙ ﺍﻟﺨﻄﺄ ﺣﻴﺚ ﻳﻘﻮﻡ ﺑﺘﺨﻄﻲ ﺍﻟـ .ﻓﻘﻂ ﻭﺫﻟﻚ ﻟﻤﻨﻊ ﺍﻟﺪﺧﻮﻝ ﺑﺤﻠﻘﺔ ﻻ ﻣﻨﺘﻬﺔ tokens ﻣﻘﺒﻮﻝ ﺣﻴﺚ ﻳﺘﺨﻄﻰ ﺛﻼﺙ token ﺃﻥ ﻳﺼﻞ ﺇﻟﻰ :ﺍﻷﺧﻄﺎء bison ﺍﻟﻄﺮﻳﻘﺔ ﺍﻟﺘﻲ ﻳﻌﺎﻟﺞ ﻓﻴﻬﺎ ﺍﻟـ 1. Discard terminals and nonterminals plus state off the parse stack until it finds a place where the error token is allowed in the current state. 2. The error token is shifted on. 3.Discard input tokens until an acceptable input token is found based on the parse stack including the error token. 4. To prevent cascades of errors only after 3 new tokens are read will the error messaging be turned back on. yyerrok statement turns on error messaging immediately indicating you have handled the error. In particular the tokens on input are not discarded (See infinite loop) :ﺛﺎﻧﻴﺎ: ﺍﻟﺘﺤﻠﻴﻞ ﺍﻟﺪﻻﻟﻲ :Symbol table ﺑﻨﻴﺔ ﺍﻟـ 4
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