From 66eaf619c3549ec331fc37a33f4deaf2c9585e01 Mon Sep 17 00:00:00 2001 From: AlexanderSLoburev <121574459+AlexanderSLoburev@users.noreply.github.com> Date: Thu, 4 Jan 2024 15:30:32 +0000 Subject: [PATCH] tokenizer remake uncompleted --- build/shunting_yard_algorithm.beam | Bin 0 -> 784 bytes common/utils.erl | 76 +++++-- shunting_yard_algorithm/.gitignore | 19 ++ shunting_yard_algorithm/LICENSE | 191 ++++++++++++++++++ shunting_yard_algorithm/README.md | 9 + shunting_yard_algorithm/rebar.config | 7 + .../src/shunting_yard_algorithm.erl | 6 + 7 files changed, 293 insertions(+), 15 deletions(-) create mode 100644 build/shunting_yard_algorithm.beam create mode 100644 shunting_yard_algorithm/.gitignore create mode 100644 shunting_yard_algorithm/LICENSE create mode 100644 shunting_yard_algorithm/README.md create mode 100644 shunting_yard_algorithm/rebar.config create mode 100644 shunting_yard_algorithm/src/shunting_yard_algorithm.erl diff --git a/build/shunting_yard_algorithm.beam b/build/shunting_yard_algorithm.beam new file mode 100644 index 0000000000000000000000000000000000000000..0ea479cd798e4f38f8d67fbf565446131d266f35 GIT binary patch literal 784 zcmbV~J8u&~5P;`yV;g}Gizy;SK&%uHQP{DBMCfcn01M}35+P{r)_3dko$cMz?%J2s zX(*AXEFmFEBpQB35&cPLCOBJY5y&}02bs@QY~Ic=CSZY=Yi3=RC;K!(FU_hQkJd9M0QL>D4%ycsjB z$&h2shX_UNd4m)X;?Oa5i%Z~?YWIPROPds&l`*)*7C5z9k!(`xY)|gg@oVIgHI+&P z9vQWZ`Op}oRxTstH*+W*B#+oPW_5Rc|F8JmjNj_^*nD@Qp=`#+*1v`f5m!2v zq6fLv^38J9nq+Fwq7&5fS`Jmfd$3o@r0VIE1zcBBrZlGE)VyCatDG|KidMmCzA~mJ zciT~n{X9MFlI(oQ+rwzG3f`!iT|~df+S(`<7%#vjz<%b06ny$`NRWj+xbn}=5`bnb g?EY*c(=(lsQ`}*2>pz>{JxFccvxuFyv-ktxC(^LZ;Q#;t literal 0 HcmV?d00001 diff --git a/common/utils.erl b/common/utils.erl index ede449f..a02503e 100644 --- a/common/utils.erl +++ b/common/utils.erl @@ -1,5 +1,5 @@ -module(utils). --export([try_parse_number/1, is_digit/1, re_escape/1, tokenize/1]). +-export([try_parse_number/1, is_digit/1, is_whitespace/1, re_escape/1]). try_parse_number(String) -> @@ -11,25 +11,71 @@ try_parse_number(String) -> is_digit(Char) -> lists:member(Char, lists:seq($0, $9)). +is_whitespace(Char) -> lists:member(Char, "\s\t\n\r"). + re_escape(String) -> Escaped = re:replace(String, "[\\[\\]\\\\^$.|?*+()]", "\\\\&", [global]), Escaped. -'_tokenize'(_Expression, [], _Position, Acc) -> lists:reverse(Acc); +identity(X) -> X. + + +% '_tokenize'(_Expression, [], _Position, Acc) -> lists:reverse(Acc); + +% '_tokenize'(Expression, Tokens, Position, Acc) -> +% [FirstToken | RestTokens] = Tokens, +% FirstPositionOfToken = string:str(Expression, FirstToken), +% LengthOfToken = string:length(FirstToken), +% SubstringStart = FirstPositionOfToken + LengthOfToken, +% TrimmedExpression = string:slice(Expression, SubstringStart), +% '_tokenize'(TrimmedExpression, RestTokens, Position + SubstringStart, [{FirstToken, Position + FirstPositionOfToken - 1} | Acc]). + +% tokenize(Expression) -> +% Tokens = lists:filter(fun(X) -> (X =/= "") and not(lists:member(X, "\s\t\n")) end, +% lists:map(fun(Token) -> binary_to_list(Token) end, +% re:split(Expression, "\\s+") +% ) +% ), +% '_tokenize'(Expression, Tokens, 1, []). + + +create_token(TokenString, StartPosition, EndPosition) -> + TokenSpec = [ + {is_number, try_parse_number, number}, + {fun(X) -> X =:= "+" end, identity, '+'}, + {fun(X) -> X =:= "-" end, identity, '-'}, + {fun(X) -> X =:= "*" end, identity, '*'}, + {fun(X) -> X =:= "/" end, identity, '/'}, + {fun(X) -> X =:= "//" end, identity, '//'}, + {fun(X) -> X =:= "%" end, identity, '%'}, + {fun(X) -> X =:= "**" end, identity, '**'} + ], + case lists:filtermap(fun({Predicate, Convert, Atom}) -> + case Predicate(TokenString) of + true -> {true, {Atom, Convert(TokenString), StartPosition, EndPosition}}; + false -> false + end + end, TokenSpec) of + [{Value}] -> Value; + false -> throw({error, io_lib:format("\"~p\" is an invalid token.", TokenString)}) + end. + + +flush_buffer(Buffer, Tokens, StartPosition, EndPosition) -> + case Buffer =/= [] of + true -> [create_token(Buffer, StartPosition, EndPosition) | Tokens]; + false -> Tokens + end. -'_tokenize'(Expression, Tokens, Position, Acc) -> - [FirstToken | RestTokens] = Tokens, - FirstPositionOfToken = string:str(Expression, FirstToken), - LengthOfToken = string:length(FirstToken), - SubstringStart = FirstPositionOfToken + LengthOfToken, - TrimmedExpression = string:slice(Expression, SubstringStart), - '_tokenize'(TrimmedExpression, RestTokens, Position + SubstringStart, [{FirstToken, Position + FirstPositionOfToken - 1} | Acc]). tokenize(Expression) -> - Tokens = lists:filter(fun(X) -> (X =/= "") and not(lists:member(X, "\s\t\n")) end, - lists:map(fun(Token) -> binary_to_list(Token) end, - re:split(Expression, "\\s+") - ) - ), - '_tokenize'(Expression, Tokens, 1, []). + lists:foldr(fun(Char, Acc) -> + case is_whitespace(Char) of + true -> + {Buffer, Tokens, StartPosition, EndPosition} = Acc, + {flush_buffer(Buffer, Tokens, StartPosition, EndPosition), [], 0, Position + 1} + false -> + case is_digit(Char) of + + end, {[], [], 0, 0}, Expression). diff --git a/shunting_yard_algorithm/.gitignore b/shunting_yard_algorithm/.gitignore new file mode 100644 index 0000000..f1c4554 --- /dev/null +++ b/shunting_yard_algorithm/.gitignore @@ -0,0 +1,19 @@ +.rebar3 +_* +.eunit +*.o +*.beam +*.plt +*.swp +*.swo +.erlang.cookie +ebin +log +erl_crash.dump +.rebar +logs +_build +.idea +*.iml +rebar3.crashdump +*~ diff --git a/shunting_yard_algorithm/LICENSE b/shunting_yard_algorithm/LICENSE new file mode 100644 index 0000000..071b569 --- /dev/null +++ b/shunting_yard_algorithm/LICENSE @@ -0,0 +1,191 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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