Object
A collection of simple heuristics that can be used to better analyze languages.
# File lib/linguist/heuristics.rb, line 86 def self.active? !!ACTIVE end
.h extensions are ambigious between C, C++, and Objective-C. We want to shortcut look for Objective-C and now C++ too!
Returns an array of Languages or []
# File lib/linguist/heuristics.rb, line 41 def self.disambiguate_c(data, languages) matches = [] matches << Language["Objective-C"] if data.include?("@interface") matches << Language["C++"] if data.include?("#include <cstdint>") matches end
# File lib/linguist/heuristics.rb, line 72 def self.disambiguate_cl(data, languages) matches = [] matches << Language["Common Lisp"] if data.include?("(defun ") matches << Language["OpenCL"] if /\/\* |\/\/ |^\}/.match(data) matches end
# File lib/linguist/heuristics.rb, line 55 def self.disambiguate_ecl(data, languages) matches = [] matches << Language["Prolog"] if data.include?(":-") matches << Language["ECL"] if data.include?(":=") matches end
# File lib/linguist/heuristics.rb, line 48 def self.disambiguate_pl(data, languages) matches = [] matches << Language["Prolog"] if data.include?(":-") matches << Language["Perl"] if data.include?("use strict") matches end
# File lib/linguist/heuristics.rb, line 79 def self.disambiguate_r(data, languages) matches = [] matches << Language["Rebol"] if /\bRebol\b/.match(data) matches << Language["R"] if data.include?("<-") matches end
# File lib/linguist/heuristics.rb, line 62 def self.disambiguate_ts(data, languages) matches = [] if (data.include?("</translation>")) matches << Language["XML"] else matches << Language["TypeScript"] end matches end
Public: Given an array of String language names, apply heuristics against the given data and return an array of matching languages, or nil.
data - Array of tokens or String data to analyze. languages - Array of language name Strings to restrict to.
Returns an array of Languages or []
# File lib/linguist/heuristics.rb, line 14 def self.find_by_heuristics(data, languages) if active? if languages.all? { |l| ["Objective-C", "C++"].include?(l) } disambiguate_c(data, languages) end if languages.all? { |l| ["Perl", "Prolog"].include?(l) } disambiguate_pl(data, languages) end if languages.all? { |l| ["ECL", "Prolog"].include?(l) } disambiguate_ecl(data, languages) end if languages.all? { |l| ["TypeScript", "XML"].include?(l) } disambiguate_ts(data, languages) end if languages.all? { |l| ["Common Lisp", "OpenCL"].include?(l) } disambiguate_cl(data, languages) end if languages.all? { |l| ["Rebol", "R"].include?(l) } disambiguate_r(data, languages) end end end
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