有个网站好像是用来查看权限配置的，To find where setResourceMonitors is defined:
defs:setResourceMonitors
To find files that use sprintf in usr/src/cmd/cmd-inet/usr.sbin/:
refs:sprintf path:usr/src/cmd/cmd-inet/usr.sbin
To find assignments to variable foo:
"foo ="
To find Makefiles where the pstack binary is being built:
pstack path:Makefile
to search for phrase "Bill Joy":
"Bill Joy"
To find perl files that do not use /usr/bin/perl but something else:
-"/usr/bin/perl" +"/bin/perl"
To find all strings beginning with foo use the wildcard:
foo*
To find all files which have . c in their name (dot is a token!):
". c"
To find all files which start with "ma" and then have only alphabet characters do:
path:/ma[a-zA-Z]*/
To find all main methods in all files analyzed by C analyzer (so .c, .h, ...) do:
main type:c
More info:
A Query is a series of clauses. A clause may be prefixed by:
a plus "+" or a minus "-" sign, indicating that the clause is required or prohibited respectively; or
a term followed by a colon ":", indicating the field to be searched. This enables one to construct queries which search multiple fields.
A clause may be either:
a term, indicating all the documents that contain this term; or
a phrase - group of words surrounded by double quotes " ", e.g. "hello dolly"
a nested query, enclosed in parentheses "(" ")" (also called query/field grouping) . Note that this may be used with a +/- prefix to require any of a set of terms.
boolean operators which allow terms to be combined through logic operators. Supported are AND(&&), "+", OR(||), NOT(!) and "-" (Note: they must be ALL CAPS).
Regular Expression, Wildcard, Fuzzy, Proximity and Range Searches:
to perform a regular expression search use the "/" enclosure, e.g. /[mb]an/ - will search for man or for ban;
NOTE: path field search escapes "/" by default, so it only supports regexps when the search string starts and ends with "/".
More info can be found on Lucene regexp page.
to perform a single character wildcard search use the "?" symbol, e.g. te?t
to perform a multiple character wildcard search use the "*" symbol, e.g. test* or te*t
you can use a * or ? symbol as the first character of a search (unless not enabled using indexer option -a).
to do a fuzzy search (find words similar in spelling, based on the Levenshtein Distance, or Edit Distance algorithm) use the tilde, "~", e.g. rcs~
to do a proximity search use the tilde, "~", symbol at the end of a Phrase. For example to search for a "opengrok" and "help" within 10 words of each other enter: "opengrok help"~10
range queries allow one to match documents whose field(s) values are between the lower and upper bound specified by the Range Query. Range Queries can be inclusive or exclusive of the upper and lower bounds. Sorting is done lexicographically. Inclusive queries are denoted by square brackets [ ] , exclusive by curly brackets { }. For example: title:{Aida TO Carmen} - will find all documents between Aida to Carmen, exclusive of Aida and Carmen.
Escaping special characters:
Opengrok supports escaping special characters that are part of the query syntax. Current special characters are:
+ - && || ! ( ) { } [ ] ^ " ~ * ? : \ /
To escape these character use the \ before the character. For example to search for (1+1):2 use the query: \(1\+1\)\:2
NOTE on analyzers: Indexed words are made up of Alpha-Numeric and Underscore characters. One letter words are usually not indexed as symbols!
Most other characters (including single and double quotes) are treated as "spaces/whitespace" (so even if you escape them, they will not be found, since most analyzers ignore them).
The exceptions are: @ $ % ^ & = ? . : which are mostly indexed as separate words.
Because some of them are part of the query syntax, they must be escaped with a reverse slash as noted above.
So searching for \+1 or \+ 1 will both find +1 and + 1.
Valid FIELDs are
full
Search through all text tokens (words,strings,identifiers,numbers) in index.
defs
Only finds symbol definitions (where e.g. a variable (function, ...) is defined).
refs
Only finds symbols (e.g. methods, classes, functions, variables).
path
path of the source file (no need to use dividers, or if, then use "/" - Windows users, "\" is an escape key in Lucene query syntax!
Please don't use "\", or replace it with "/").
Also note that if you want just exact path, enclose it in "", e.g. "src/mypath", otherwise dividers will be removed and you get more hits.
type
Type of analyzer used to scope down to certain file types (e.g. just C sources).
Current mappings: [ada=Ada, asm=Asm, bzip2=Bzip(2), c=C, clojure=Clojure, csharp=C#, cxx=C++, eiffel=Eiffel, elf=ELF, erlang=Erlang, file=Image file, fortran=Fortran, golang=Golang, gzip=GZIP, haskell=Haskell, hcl=HCL, jar=Jar, java=Java, javaclass=Java class, javascript=JavaScript, json=Json, kotlin=Kotlin, lisp=Lisp, lua=Lua, mandoc=Manual pages, pascal=Pascal, perl=Perl, php=PHP, plain=Plain Text, plsql=PL/SQL, powershell=PowerShell script, python=Python, r=R, ruby=Ruby, rust=Rust, scala=Scala, sh=Shell script, sql=SQL, swift=Swift, tar=Tar, tcl=Tcl, terraform=Terraform, troff=Troff, typescript=TypeScript, uuencode=UUEncoded, vb=Visual Basic, verilog=Verilog, xml=XML, yaml=Yaml, zip=Zip]
The term (phrases) can be boosted (making it more relevant) using a caret ^ , e.g. help^4 opengrok - will make term help boosted
Opengrok search is powered by Lucene, for more detail on query syntax refer to Lucene docs.
Intelligence Window这是用例，我该怎么来查找这个权限
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本文介绍了一种高级编程概念，即如何在 Kotlin 中将函数作为值进行传递和返回。通过一个具体的示例展示了如何定义并使用这样的函数，进而帮助读者理解函数式编程的基本思想。
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