" Description: Omni completion tokenizer" Maintainer:  Vissale NEANG" Last Change: 25 jun 2006" TODO: Generic behaviour for Tokenize()" From the C++ BNFlet s:cppKeyword = ['asm', 'auto', 'bool', 'break', 'case', 'catch', 'char', 'class', 'const', 'const_cast', 'continue', 'default', 'delete', 'do', 'double', 'dynamic_cast', 'else', 'enum', 'explicit', 'export', 'extern', 'false', 'float', 'for', 'friend', 'goto', 'if', 'inline', 'int', 'long', 'mutable', 'namespace', 'new', 'operator', 'private', 'protected', 'public', 'register', 'reinterpret_cast', 'return', 'short', 'signed', 'sizeof', 'static', 'static_cast', 'struct', 'switch', 'template', 'this', 'throw', 'true', 'try', 'typedef', 'typeid', 'typename', 'union', 'unsigned', 'using', 'virtual', 'void', 'volatile', 'wchar_t', 'while', 'and', 'and_eq', 'bitand', 'bitor', 'compl', 'not', 'not_eq', 'or', 'or_eq', 'xor', 'xor_eq']let s:reCppKeyword = '\C\<'.join(s:cppKeyword, '\>\|\<').'\>'" The order of items in this list is very important because we use this list to build a regular" expression (see below) for tokenizationlet s:cppOperatorPunctuator = ['->*', '->', '--', '-=', '-', '!=', '!', '##', '#', '%:%:', '%=', '%>', '%:', '%', '&&', '&=', '&', '(', ')', '*=', '*', ',', '...', '.*', '.', '/=', '/', '::', ':>', ':', ';', '?', '[', ']', '^=', '^', '{', '||', '|=', '|', '}', '~', '++', '+=', '+', '<<=', '<%', '<:', '<<', '<=', '<', '==', '=', '>>=', '>>', '>=', '>']" We build the regexp for the tokenizerlet s:reCComment = '\/\*\|\*\/'let s:reCppComment = '\/\/'let s:reComment = s:reCComment.'\|'.s:reCppCommentlet s:reCppOperatorOrPunctuator = escape(join(s:cppOperatorPunctuator, '\|'), '*./^~[]')" Tokenize a c++ code" a token is dictionary where keys are:"   -   kind = cppKeyword|cppWord|cppOperatorPunctuator|unknown|cComment|cppComment|cppDigit"   -   value = 'something'"   Note: a cppWord is any word that is not a cpp keywordfunction! omni#cpp#tokenizer#Tokenize(szCode)    let result = []    " The regexp to find a token, a token is a keyword, word or    " c++ operator or punctuator. To work properly we have to put     " spaces and tabs to our regexp.    let reTokenSearch = '\(\w\+\)\|\s\+\|'.s:reComment.'\|'.s:reCppOperatorOrPunctuator    " eg: 'using namespace std;'    "      ^    ^    "  start=0 end=5    let startPos = 0    let endPos = matchend(a:szCode, reTokenSearch)    let len = endPos-startPos    while endPos!=-1        " eg: 'using namespace std;'        "      ^    ^        "  start=0 end=5        "  token = 'using'        " We also remove space and tabs        let token = substitute(strpart(a:szCode, startPos, len), '\s', '', 'g')        " eg: 'using namespace std;'        "           ^         ^        "       start=5     end=15        let startPos = endPos        let endPos = matchend(a:szCode, reTokenSearch, startPos)        let len = endPos-startPos        " It the token is empty we continue        if token==''            continue        endif        " Building the token        let resultToken = {'kind' : 'unknown', 'value' : token}        " Classify the token        if token =~ '^\d\+'            " It's a digit            let resultToken.kind = 'cppDigit'        elseif token=~'^\w\+$'            " It's a word            let resultToken.kind = 'cppWord'            " But maybe it's a c++ keyword            if match(token, s:reCppKeyword)>=0                let resultToken.kind = 'cppKeyword'            endif        else            if match(token, s:reComment)>=0                if index(['/*','*/'],token)>=0                    let resultToken.kind = 'cComment'                else                    let resultToken.kind = 'cppComment'                endif            else                " It's an operator                let resultToken.kind = 'cppOperatorPunctuator'            endif        endif        " We have our token, let's add it to the result list        call extend(result, [resultToken])    endwhile    return resultendfunc