heuristics.yml

# A collection of simple regexp-based rules that can be applied to content
# to disambiguate languages with the same file extension.
#
# There two top-level keys: disambiguations and named_patterns.
#
# disambiguations     - a list of disambiguation rules, one for each
#                       extension or group of extensions.
# extensions          - an array of file extensions that this block applies to.
# rules               - list of rules that are applied in order to the content
#                       of a file with matching extension. Rules are evaluated
#                       until one of them matches. If none matches, no language
#                       is returned.
# language            - Language to be returned if the rule matches.
# pattern             - Ruby-compatible regular expression that makes the rule
#                       match. If no pattern is specified, the rule always match.
#                       Pattern can be a string with a single regular expression
#                       or an array of strings that will be merged in a single
#                       regular expression (with union).
# and                 - An and block merges multiple rules and checks that all of
#                       of them must match.
# negative_pattern    - Same as pattern, but checks for absence of matches.
# named_pattern       - A pattern can be reused by specifying it in the
#                       named_patterns section and referencing it here by its
#                       key.
# named_patterns      - Key-value map of reusable named patterns.
#
# Please keep this list alphabetized.
#
---
disambiguations:
- extensions: ['.1', '.2', '.3', '.4', '.5', '.6', '.7', '.8', '.9']
  rules:
  - language: Roff Manpage
    and:
    - named_pattern: mdoc-date
    - named_pattern: mdoc-title
    - named_pattern: mdoc-heading
  - language: Roff Manpage
    and:
    - named_pattern: man-title
    - named_pattern: man-heading
  - language: Roff
    pattern: '^\.(?:[A-Za-z]{2}(?:\s|$)|\\")'
- extensions: ['.1in', '.1m', '.1x', '.3in', '.3m', '.3p', '.3pm', '.3qt', '.3x', '.man', '.mdoc']
  rules:
  - language: Roff Manpage
    and:
    - named_pattern: mdoc-date
    - named_pattern: mdoc-title
    - named_pattern: mdoc-heading
  - language: Roff Manpage
    and:
    - named_pattern: man-title
    - named_pattern: man-heading
  - language: Roff
- extensions: ['.al']
  rules:
  # AL pattern source from https://github.com/microsoft/AL/blob/master/grammar/alsyntax.tmlanguage - keyword.other.applicationobject.al
  - language: AL
    and:
    - pattern: '\b(?i:(CODEUNIT|PAGE|PAGEEXTENSION|PAGECUSTOMIZATION|DOTNET|ENUM|ENUMEXTENSION|VALUE|QUERY|REPORT|TABLE|TABLEEXTENSION|XMLPORT|PROFILE|CONTROLADDIN))\b'
  # Open-ended fallback to Perl AutoLoader
  - language: Perl
- extensions: ['.as']
  rules:
  - language: ActionScript
    pattern: '^\s*(?:package(?:\s+[\w.]+)?\s+(?:{|$)|import\s+[\w.*]+\s*;|(?=.*?(?:intrinsic|extends))(intrinsic\s+)?class\s+[\w<>.]+(?:\s+extends\s+[\w<>.]+)?|(?:(?:public|protected|private|static)\s+)*(?:(?:var|const|local)\s+\w+\s*:\s*[\w<>.]+(?:\s*=.*)?\s*;|function\s+\w+\s*\((?:\s*\w+\s*:\s*[\w<>.]+\s*(,\s*\w+\s*:\s*[\w<>.]+\s*)*)?\)))'
- extensions: ['.asc']
  rules:
  - language: Public Key
    pattern: '^(----[- ]BEGIN|ssh-(rsa|dss)) '
  - language: AsciiDoc
    pattern: '^[=-]+(\s|\n)|{{[A-Za-z]'
  - language: AGS Script
    pattern: '^(\/\/.+|((import|export)\s+)?(function|int|float|char)\s+((room|repeatedly|on|game)_)?([A-Za-z]+[A-Za-z_0-9]+)\s*[;\(])'
- extensions: ['.asm']
  rules:
  - language: Motorola 68K Assembly
    named_pattern: m68k
- extensions: ['.asy']
  rules:
  - language: LTspice Symbol
    pattern: '^SymbolType[ \t]'
  - language: Asymptote
- extensions: ['.bas']
  rules:
  - language: FreeBasic
    pattern: '^[ \t]*#(?:define|endif|endmacro|ifn?def|if|include|lang|macro)\s'
  - language: BASIC
    pattern: '^\s*\d+'
- extensions: ['.bb']
  rules:
  - language: BlitzBasic
    pattern: '(<^\s*; |End Function)'
  - language: BitBake
    pattern: '^\s*(# |include|require)\b'
  - language: Clojure
    pattern: '\((def|defn|defmacro|let)\s'
- extensions: ['.bf']
  rules:
  - language: Beef
    pattern: '(?-m)^\s*using\s+(System|Beefy)(\.(.*))?;\s*$'
  - language: HyPhy
    pattern:
    - '(?-m)^\s*#include\s+".*";\s*$'
    - '\sfprintf\s*\('
  - language: Brainfuck
    pattern: '(>\+>|>\+<)'
- extensions: ['.bi']
  rules:
  - language: FreeBasic
    pattern: '^[ \t]*#(?:define|endif|endmacro|ifn?def|if|include|lang|macro)\s'
- extensions: ['.bs']
  rules:
  - language: Bikeshed
    pattern: '^(?i:<pre\s+class)\s*=\s*(''|\"|\b)metadata\b\1[^>\r\n]*>'
  - language: BrighterScript
    pattern:
    - (?i:^\s*(?=^sub\s)(?:sub\s*\w+\(.*?\))|(?::\s*sub\(.*?\))$)
    - (?i:^\s*(end\ssub)$)
    - (?i:^\s*(?=^function\s)(?:function\s*\w+\(.*?\)\s*as\s*\w*)|(?::\s*function\(.*?\)\s*as\s*\w*)$)
    - (?i:^\s*(end\sfunction)$)
- extensions: ['.builds']
  rules:
  - language: XML
    pattern: '^(\s*)(?i:<Project|<Import|<Property|<?xml|xmlns)'
- extensions: ['.ch']
  rules:
  - language: xBase
    pattern: '^\s*#\s*(?i:if|ifdef|ifndef|define|command|xcommand|translate|xtranslate|include|pragma|undef)\b'
- extensions: ['.cl']
  rules:
  - language: Common Lisp
    pattern: '^\s*\((?i:defun|in-package|defpackage) '
  - language: Cool
    pattern: '^class'
  - language: OpenCL
    pattern: '\/\* |\/\/ |^\}'
- extensions: ['.cls']
  rules:
  - language: Visual Basic 6.0
    and:
    - named_pattern: vb-class
    - pattern: '^\s*BEGIN\R\s*MultiUse\s*=.*\R\s*Persistable\s*='
  - language: VBA
    named_pattern: vb-class  
  - language: TeX
    pattern: '^\s*\\(?:NeedsTeXFormat|ProvidesClass){'
  - language: ObjectScript
    pattern: '^Class\s'
- extensions: ['.cmp']
  rules:
  - language: Gerber Image
    pattern: '^[DGMT][0-9]{2}\*\r?\n'
- extensions: ['.cs']
  rules:
  - language: Smalltalk
    pattern: '![\w\s]+methodsFor: '
  - language: 'C#'
    pattern: '^\s*(using\s+[A-Z][\s\w.]+;|namespace\s*[\w\.]+\s*({|;)|\/\/)'
- extensions: ['.csc']
  rules:
  - language: GSC
    named_pattern: gsc
- extensions: ['.csl']
  rules:
  - language: XML
    pattern: '(?i:^\s*(\<\?xml|xmlns))'
  - language: Kusto
    pattern: '(^\|\s*(where|extend|project|limit|summarize))|(^\.\w+)'
- extensions: ['.d']
  rules:
  - language: D
    # see http://dlang.org/spec/grammar
    # ModuleDeclaration | ImportDeclaration | FuncDeclaration | unittest
    pattern: '^module\s+[\w.]*\s*;|import\s+[\w\s,.:]*;|\w+\s+\w+\s*\(.*\)(?:\(.*\))?\s*{[^}]*}|unittest\s*(?:\(.*\))?\s*{[^}]*}'
  - language: DTrace
    # see http://dtrace.org/guide/chp-prog.html, http://dtrace.org/guide/chp-profile.html, http://dtrace.org/guide/chp-opt.html
    pattern: '^(\w+:\w*:\w*:\w*|BEGIN|END|provider\s+|(tick|profile)-\w+\s+{[^}]*}|#pragma\s+D\s+(option|attributes|depends_on)\s|#pragma\s+ident\s)'
  - language: Makefile
    # path/target : dependency \
    # target : \
    #  : dependency
    # path/file.ext1 : some/path/../file.ext2
    pattern: '([\/\\].*:\s+.*\s\\$|: \\$|^[ %]:|^[\w\s\/\\.]+\w+\.\w+\s*:\s+[\w\s\/\\.]+\w+\.\w+)'
- extensions: ['.dsp']
  rules:
  - language: Microsoft Developer Studio Project
    pattern: '# Microsoft Developer Studio Generated Build File'
  - language: Faust
    pattern: '\bprocess\s*[(=]|\b(library|import)\s*\(\s*"|\bdeclare\s+(name|version|author|copyright|license)\s+"'
- extensions: ['.e']
  rules:
  - language: E
    pattern:
    - '^\s*(def|var)\s+(.+):='
    - '^\s*(def|to)\s+(\w+)(\(.+\))?\s+{'
    - '^\s*(when)\s+(\(.+\))\s+->\s+{'
  - language: Eiffel
    pattern:
    - '^\s*\w+\s*(?:,\s*\w+)*[:]\s*\w+\s'
    - '^\s*\w+\s*(?:\(\s*\w+[:][^)]+\))?(?:[:]\s*\w+)?(?:--.+\s+)*\s+(?:do|local)\s'
    - '^\s*(?:across|deferred|elseif|ensure|feature|from|inherit|inspect|invariant|note|once|require|undefine|variant|when)\s*$'
  - language: Euphoria
    named_pattern: euphoria
- extensions: ['.ecl']
  rules:
  - language: ECLiPSe
    pattern: '^[^#]+:-'
  - language: ECL
    pattern: ':='
- extensions: ['.es']
  rules:
  - language: Erlang
    pattern: '^\s*(?:%%|main\s*\(.*?\)\s*->)'
  - language: JavaScript
    pattern: '(?m:\/\/|("|'')use strict\1|export\s+default\s|\/\*.*?\*\/)'
- extensions: ['.ex']
  rules:
  - language: Elixir
    pattern:
    - '^\s*@moduledoc\s'
    - '^\s*(?:cond|import|quote|unless)\s'
    - '^\s*def(?:exception|impl|macro|module|protocol)[(\s]'
  - language: Euphoria
    named_pattern: euphoria
- extensions: ['.f']
  rules:
  - language: Forth
    pattern: '^: '
  - language: Filebench WML
    pattern: 'flowop'
  - language: Fortran
    named_pattern: fortran
- extensions: ['.for']
  rules:
  - language: Forth
    pattern: '^: '
  - language: Fortran
    named_pattern: fortran
- extensions: ['.fr']
  rules:
  - language: Forth
    pattern: '^(: |also |new-device|previous )'
  - language: Frege
    pattern: '^\s*(import|module|package|data|type) '
  - language: Text
- extensions: ['.frm']
  rules:
  - language: VBA
    and:
    - named_pattern: vb-form
    - pattern: '^\s*Begin\s+{[0-9A-Z\-]*}\s?'
  - language: Visual Basic 6.0
    and:
    - named_pattern: vb-form
    - pattern: '^\s*Begin\s+VB\.Form\s+'  
- extensions: ['.fs']
  rules:
  - language: Forth
    pattern: '^(: |new-device)'
  - language: 'F#'
    pattern: '^\s*(#light|import|let|module|namespace|open|type)'
  - language: GLSL
    pattern: '^\s*(#version|precision|uniform|varying|vec[234])'
  - language: Filterscript
    pattern: '#include|#pragma\s+(rs|version)|__attribute__'
- extensions: ['.ftl']
  rules:
  - language: FreeMarker
    pattern: '^(?:<|[a-zA-Z-][a-zA-Z0-9_-]+[ \t]+\w)|\${\w+[^\n]*?}|^[ \t]*(?:<#--.*?-->|<#([a-z]+)(?=\s|>)[^>]*>.*?</#\1>|\[#--.*?--\]|\[#([a-z]+)(?=\s|\])[^\]]*\].*?\[#\2\])'
  - language: Fluent
    pattern: '^-?[a-zA-Z][a-zA-Z0-9_-]* *=|\{\$-?[a-zA-Z][-\w]*(?:\.[a-zA-Z][-\w]*)?\}'
- extensions: ['.g']
  rules:
  - language: GAP
    pattern: '\s*(Declare|BindGlobal|KeyDependentOperation|Install(Method|GlobalFunction)|SetPackageInfo)'
  - language: G-code
    pattern: '^[MG][0-9]+\n'
- extensions: ['.gd']
  rules:
  - language: GAP
    pattern: '\s*(Declare|BindGlobal|KeyDependentOperation)'
  - language: GDScript
    pattern: '\s*(extends|var|const|enum|func|class|signal|tool|yield|assert|onready)'
- extensions: ['.gml']
  rules:
  - language: XML
    pattern: '(?i:^\s*(\<\?xml|xmlns))'
  - language: Graph Modeling Language
    pattern: '(?i:^\s*(graph|node)\s+\[$)'
  - language: Gerber Image
    pattern: '^[DGMT][0-9]{2}\*$'
  - language: Game Maker Language
- extensions: ['.gs']
  rules:
  - language: GLSL
    pattern: '^#version\s+[0-9]+\b'
  - language: Gosu
    pattern: '^uses (java|gw)\.'
  - language: Genie
    pattern: '^\[indent=[0-9]+\]'
- extensions: ['.gsc']
  rules:
  - language: GSC
    named_pattern: gsc
- extensions: ['.gsh']
  rules:
  - language: GSC
    named_pattern: gsc
- extensions: ['.h']
  rules:
  - language: Objective-C
    named_pattern: objectivec
  - language: C++
    named_pattern: cpp
  - language: C
- extensions: ['.hh']
  rules:
  - language: Hack
    pattern: '<\?hh'
- extensions: ['.html']
  rules:
  - language: Ecmarkup
    pattern: '<emu-(?:alg|annex|biblio|clause|eqn|example|figure|gann|gmod|gprose|grammar|intro|not-ref|note|nt|prodref|production|rhs|table|t|xref)(?:$|\s|>)'
  - language: HTML
- extensions: ['.i']
  rules:
  - language: Motorola 68K Assembly
    named_pattern: m68k
  - language: SWIG
    pattern: '^[ \t]*%[a-z_]+\b|^%[{}]$'
- extensions: ['.ice']
  rules:
  - language: JSON
    pattern: '\A\s*[{\[]'
  - language: Slice
- extensions: ['.inc']
  rules:
  - language: Motorola 68K Assembly
    named_pattern: m68k
  - language: PHP
    pattern: '^<\?(?:php)?'
  - language: SourcePawn
    pattern:
    - '^public\s+(?:SharedPlugin(?:\s+|:)__pl_\w+\s*=(?:\s*{)?|(?:void\s+)?__pl_\w+_SetNTVOptional\(\)(?:\s*{)?)'
    - '^methodmap\s+\w+\s+<\s+\w+'
    - '^\s*MarkNativeAsOptional\s*\('
  - language: NASL
    pattern:
    - '^\s*include\s*\(\s*(?:"|'')[\\/\w\-\.:\s]+\.(?:nasl|inc)\s*(?:"|'')\s*\)\s*;'
    - '^\s*(?:global|local)_var\s+(?:\w+(?:\s*=\s*[\w\-"'']+)?\s*)(?:,\s*\w+(?:\s*=\s*[\w\-"'']+)?\s*)*+\s*;'
    - '^\s*namespace\s+\w+\s*{'
    - '^\s*object\s+\w+\s*(?:extends\s+\w+(?:::\w+)?)?\s*{'
    - '^\s*(?:public\s+|private\s+|\s*)function\s+\w+\s*\([\w\s,]*\)\s*{'
  - language: POV-Ray SDL
    pattern: '^\s*#(declare|local|macro|while)\s'
  - language: Pascal
    pattern:
    - '(?i:^\s*{\$(?:mode|ifdef|undef|define)[ ]+[a-z0-9_]+})'
    - '^\s*end[.;]\s*$'
- extensions: ['.json']
  rules:
  - language: OASv2-json
    pattern: '"swagger":\s?"2.[0-9.]+"'
  - language: OASv3-json
    pattern: '"openapi":\s?"3.[0-9.]+"'
  - language: JSON
- extensions: ['.l']
  rules:
  - language: Common Lisp
    pattern: '\(def(un|macro)\s'
  - language: Lex
    pattern: '^(%[%{}]xs|<.*>)'
  - language: Roff
    pattern: '^\.[A-Za-z]{2}(\s|$)'
  - language: PicoLisp
    pattern: '^\((de|class|rel|code|data|must)\s'
- extensions: ['.ls']
  rules:
  - language: LoomScript
    pattern: '^\s*package\s*[\w\.\/\*\s]*\s*{'
  - language: LiveScript
- extensions: ['.lsp', '.lisp']
  rules:
  - language: Common Lisp
    pattern: '^\s*\((?i:defun|in-package|defpackage) '
  - language: NewLisp
    pattern: '^\s*\(define '
- extensions: ['.m']
  rules:
  - language: Objective-C
    named_pattern: objectivec
  - language: Mercury
    pattern: ':- module'
  - language: MUF
    pattern: '^: '
  - language: M
    pattern: '^\s*;'
  - language: Mathematica
    and:
      - pattern: '\(\*'
      - pattern: '\*\)$'
  - language: MATLAB
    pattern: '^\s*%'
  - language: Limbo
    pattern: '^\w+\s*:\s*module\s*{'
- extensions: ['.m4']
  rules:
  - language: M4Sugar
    pattern:
    - 'AC_DEFUN|AC_PREREQ|AC_INIT'
    - '^_?m4_'
  - language: 'M4'
- extensions: ['.mask']
  rules:
  - language: Unity3D Asset
    pattern: 'tag:unity3d.com'
- extensions: ['.mc']
  rules:
  - language: Win32 Message File
    pattern: '(?i)^[ \t]*(?>\/\*\s*)?MessageId=|^\.$'
  - language: M4
    pattern: '^dnl|^divert\((?:-?\d+)?\)|^\w+\(`[^\n]*?''[),]'
  - language: Monkey C
    pattern: '\b(?:using|module|function|class|var)\s+\w'
- extensions: ['.md']
  rules:
  - language: Markdown
    pattern:
    - '(^[-A-Za-z0-9=#!\*\[|>])|<\/'
    - '\A\z'
  - language: GCC Machine Description
    pattern: '^(;;|\(define_)'
  - language: Markdown
- extensions: ['.ml']
  rules:
  - language: OCaml
    pattern: '(^\s*module)|let rec |match\s+(\S+\s)+with'
  - language: Standard ML
    pattern: '=> |case\s+(\S+\s)+of'
- extensions: ['.mod']
  rules:
  - language: XML
    pattern: '<!ENTITY '
  - language: Modula-2
    pattern: '^\s*(?i:MODULE|END) [\w\.]+;'
  - language: [Linux Kernel Module, AMPL]
- extensions: ['.ms']
  rules:
  - language: Roff
    pattern: '^[.''][A-Za-z]{2}(\s|$)'
  - language: Unix Assembly
    and:
      - negative_pattern: '/\*'
      - pattern: '^\s*\.(?:include\s|globa?l\s|[A-Za-z][_A-Za-z0-9]*:)'
  - language: MAXScript
- extensions: ['.n']
  rules:
  - language: Roff
    pattern: '^[.'']'
  - language: Nemerle
    pattern: '^(module|namespace|using)\s'
- extensions: ['.ncl']
  rules:
  - language: XML
    pattern: '^\s*<\?xml\s+version'
  - language: Gerber Image
    pattern: '^[DGMT][0-9]{2}\*\r?\n'
  - language: Text
    pattern: 'THE_TITLE'
- extensions: ['.nl']
  rules:
  - language: NL
    pattern: '^(b|g)[0-9]+ '
  - language: NewLisp
- extensions: ['.odin']
  rules:
  - language: Object Data Instance Notation
    pattern: '(?:^|<)\s*[A-Za-z0-9_]+\s*=\s*<'
  - language: Odin
    pattern: 'package\s+\w+|\b(?:im|ex)port\s*"[\w:./]+"|\w+\s*::\s*(?:proc|struct)\s*\(|^\s*//\s'
- extensions: ['.p']
  rules:
  - language: Gnuplot
    pattern:
    - '^s?plot\b'
    - '^set\s+(term|terminal|out|output|[xy]tics|[xy]label|[xy]range|style)\b'
  - language: OpenEdge ABL
- extensions: ['.php']
  rules:
  - language: Hack
    pattern: '<\?hh'
  - language: PHP
    pattern: '<\?[^h]'
- extensions: ['.pl']
  rules:
  - language: Prolog
    pattern: '^[^#]*:-'
  - language: Perl
    named_pattern: perl5
  - language: Raku
    named_pattern: perl6
- extensions: ['.plist']
  rules:
  - language: XML Property List
    pattern: '^\s*(?:<\?xml\s|<!DOCTYPE\s+plist|<plist(?:\s+version\s*=\s*(["''])\d+(?:\.\d+)?\1)?\s*>\s*$)'
  - language: OpenStep Property List
- extensions: ['.pm']
  rules:
  - language: Perl
    named_pattern: perl5
  - language: Raku
    named_pattern: perl6
  - language: X PixMap
    pattern: '^\s*\/\* XPM \*\/'
- extensions: ['.pod']
  rules:
  - language: Pod 6
    pattern: '^[\s&&[^\n]]*=(comment|begin pod|begin para|item\d+)'
  - language: Pod
- extensions: ['.pp']
  rules:
  - language: Pascal
    pattern: '^\s*end[.;]'
  - language: Puppet
    pattern: '^\s+\w+\s+=>\s'
- extensions: ['.pro']
  rules:
  - language: Proguard
    pattern: '^-(include\b.*\.pro$|keep\b|keepclassmembers\b|keepattributes\b)'
  - language: Prolog
    pattern: '^[^\[#]+:-'
  - language: INI
    pattern: 'last_client='
  - language: QMake
    and:
    - pattern: HEADERS
    - pattern: SOURCES
  - language: IDL
    pattern: '^\s*(?i:function|pro|compile_opt) \w[ \w,:]*$'
- extensions: ['.properties']
  rules:
  - language: INI
    and:
    - named_pattern: key_equals_value
    - pattern: '^[;\[]'
  - language: Java Properties
    and:
    - named_pattern: key_equals_value
    - pattern: '^[#!]'
  - language: INI
    named_pattern: key_equals_value
  - language: Java Properties
    pattern: '^[^#!][^:]*:'
- extensions: ['.q']
  rules:
  - language: q
    pattern: '((?i:[A-Z.][\w.]*:{)|(^|\n)\\(cd?|d|l|p|ts?) )'
  - language: HiveQL
    pattern: '(?i:SELECT\s+[\w*,]+\s+FROM|(CREATE|ALTER|DROP)\s(DATABASE|SCHEMA|TABLE))'
- extensions: ['.qs']
  rules:
  - language: Q#
    pattern: '^((\/{2,3})?\s*(namespace|operation)\b)'
  - language: Qt Script
    pattern: '(\w+\.prototype\.\w+|===|\bvar\b)'
- extensions: ['.r']
  rules:
  - language: Rebol
    pattern: '(?i:\bRebol\b)'
  - language: R
    pattern: '<-|^\s*#'
- extensions: ['.re']
  rules:
  - language: Reason
    pattern:
    - '^\s*module\s+type\s'
    - '^\s*(?:include|open)\s+\w+\s*;\s*$'
    - '^\s*let\s+(?:module\s\w+\s*=\s*{|\w+:\s+.*=.*;\s*$)'
  - language: C++
    pattern:
    - '^\s*#(?:(?:if|ifdef|define|pragma)\s+\w|\s*include\s+<[^>]+>)'
    - '^\s*template\s*<'
- extensions: ['.res']
  rules:
  - language: ReScript
    pattern:
    - '^\s*(let|module|type)\s+\w*\s+=\s+'
    - '^\s*(?:include|open)\s+\w+\s*$'
- extensions: ['.rno']
  rules:
  - language: RUNOFF
    pattern: '(?i:^\.!|^\f|\f$|^\.end lit(?:eral)?\b|^\.[a-zA-Z].*?;\.[a-zA-Z](?:[; \t])|\^\*[^\s*][^*]*\\\*(?=$|\s)|^\.c;[ \t]*\w+)'
  - language: Roff
    pattern: '^\.\\" '
- extensions: ['.rpy']
  rules:
  - language: Python
    pattern: '(?m:^(import|from|class|def)\s)'
  - language: "Ren'Py"
- extensions: ['.rs']
  rules:
  - language: Rust
    pattern: '^(use |fn |mod |pub |macro_rules|impl|#!?\[)'
  - language: RenderScript
    pattern: '#include|#pragma\s+(rs|version)|__attribute__'
  - language: XML
    pattern: '^\s*<\?xml'
- extensions: ['.s']
  rules:
  - language: Motorola 68K Assembly
    named_pattern: m68k
- extensions: ['.sc']
  rules:
  - language: SuperCollider
    pattern: '(?i:\^(this|super)\.|^\s*~\w+\s*=\.)'
  - language: Scala
    pattern: '(^\s*import (scala|java)\.|^\s*class\b)'
- extensions: ['.scd']
  rules:
  - language: SuperCollider
    pattern: '(?i:\^(this|super)\.|^\s*(~\w+\s*=\.|SynthDef\b))'
  - language: Markdown
    # Markdown syntax for scdoc
    pattern: '^#+\s+(NAME|SYNOPSIS|DESCRIPTION)'
- extensions: ['.sol']
  rules:
  - language: Solidity
    pattern: '\bpragma\s+solidity\b|\b(?:abstract\s+)?contract\s+(?!\d)[a-zA-Z0-9$_]+(?:\s+is\s+(?:[a-zA-Z0-9$_][^\{]*?)?)?\s*\{'
  - language: Gerber Image
    pattern: '^[DGMT][0-9]{2}\*\r?\n'
- extensions: ['.sql']
  rules:
   # Postgres
  - language: PLpgSQL
    pattern: '(?i:^\\i\b|AS\s+\$\$|LANGUAGE\s+''?plpgsql''?|BEGIN(\s+WORK)?\s*;)'
  # IBM db2
  - language: SQLPL
    pattern: '(?i:ALTER\s+MODULE|MODE\s+DB2SQL|\bSYS(CAT|PROC)\.|ASSOCIATE\s+RESULT\s+SET|\bEND!\s*$)'
  # Oracle
  - language: PLSQL
    pattern: '(?i:\$\$PLSQL_|XMLTYPE|systimestamp|\.nextval|CONNECT\s+BY|AUTHID\s+(DEFINER|CURRENT_USER)|constructor\W+function)'
  # T-SQL
  - language: TSQL
    pattern: '(?i:^\s*GO\b|BEGIN(\s+TRY|\s+CATCH)|OUTPUT\s+INSERTED|DECLARE\s+@|\[dbo\])'
  - language: SQL
- extensions: ['.srt']
  rules:
  - language: SubRip Text
    pattern: '^(\d{2}:\d{2}:\d{2},\d{3})\s*(-->)\s*(\d{2}:\d{2}:\d{2},\d{3})$'
- extensions: ['.st']
  rules:
  - language: StringTemplate
    pattern: '\$\w+[($]|(.)!\s*.+?\s*!\1|<!\s*.+?\s*!>|\[!\s*.+?\s*!\]|\{!\s*.+?\s*!\}'
  - language: Smalltalk
    pattern: '\A\s*[\[{(^"''\w#]|[a-zA-Z_]\w*\s*:=\s*[a-zA-Z_]\w*|class\s*>>\s*[a-zA-Z_]\w*|^[a-zA-Z_]\w*\s+[a-zA-Z_]\w*:|^Class\s*{|if(?:True|False):\s*\['
- extensions: ['.star']
  rules:
  - language: STAR
    pattern: '^loop_\s*$'
  - language: Starlark
- extensions: ['.stl']
  rules:
  - language: STL
    pattern: '\A\s*solid(?=$|\s)(?m:.*?)\Rendsolid(?:$|\s)'
- extensions: ['.t']
  rules:
  - language: Perl
    named_pattern: perl5
  - language: Raku
    pattern: '^\s*(?:use\s+v6\b|\bmodule\b|\bmy\s+class\b)'
  - language: Turing
    pattern: '^\s*%[ \t]+|^\s*var\s+\w+(\s*:\s*\w+)?\s*:=\s*\w+'
- extensions: ['.tag']
  rules:
  - language: Java Server Pages
    pattern: '<%[@!=\s]?\s*(taglib|tag|include|attribute|variable)\s'
- extensions: ['.toc']
  rules:
  - language: World of Warcraft Addon Data
    pattern: '^## |@no-lib-strip@'
  - language: TeX
    pattern: '^\\(contentsline|defcounter|beamer|boolfalse)'
- extensions: ['.ts']
  rules:
  - language: XML
    pattern: '<TS\b'
  - language: TypeScript
- extensions: ['.tst']
  rules:
  - language: GAP
    pattern: 'gap> '
  # Heads up - we don't usually write heuristics like this (with no regex match)
  - language: Scilab
- extensions: ['.tsx']
  rules:
  - language: TSX
    pattern: '^\s*(import.+(from\s+|require\()[''"]react|\/\/\/\s*<reference\s)'
  - language: XML
    pattern: '(?i:^\s*<\?xml\s+version)'
- extensions: ['.txt']
  rules:
    # The following RegExp is simply a collapsed and simplified form of the
    # VIM_MODELINE pattern in `./lib/linguist/strategy/modeline.rb`.
  - language: Vim Help File
    pattern: '(?:(?:^|[ \t])(?:vi|Vi(?=m))(?:m[<=>]?[0-9]+|m)?|[ \t]ex)(?=:(?=[ \t]*set?[ \t][^\r\n:]+:)|:(?![ \t]*set?[ \t]))(?:(?:[ \t]*:[ \t]*|[ \t])\w*(?:[ \t]*=(?:[^\\\s]|\\.)*)?)*[ \t:](?:filetype|ft|syntax)[ \t]*=(help)(?=$|\s|:)'
  - language: Adblock Filter List
    pattern: |-
      (?x)\A
      \[
      (?<version>
        (?:
          [Aa]d[Bb]lock
          (?:[ \t][Pp]lus)?
          |
          u[Bb]lock
          (?:[ \t][Oo]rigin)?
          |
          [Aa]d[Gg]uard
        )
        (?:[ \t] \d+(?:\.\d+)*+)?
      )
      (?:
        [ \t]?;[ \t]?
        \g<version>
      )*+
      \]
    # HACK: This is a contrived use of heuristics needed to address
    # an unusual edge-case. See https://git.io/JULye for discussion.
  - language: Text
- extensions: ['.url']
  rules:
  - language: INI
    pattern: '^\[InternetShortcut\]\R(?>[^\s\[][^\n]*\R)*URL='
- extensions: ['.v']
  rules:
  - language: Coq
    pattern: '(?:^|\s)(?:Proof|Qed)\.(?:$|\s)|(?:^|\s)Require[ \t]+(Import|Export)\s'
  - language: Verilog
    pattern: '^[ \t]*module\s+[^\s()]+\s+\#?\(|^[ \t]*`(?:define|ifdef|ifndef|include|timescale)|^[ \t]*always[ \t]+@|^[ \t]*initial[ \t]+(begin|@)'
  - language: V
    pattern: '\$(?:if|else)[ \t]|^[ \t]*fn\s+[^\s()]+\(.*?\).*?\{|^[ \t]*for\s*\{'
- extensions: ['.vba']
  rules:
  - language: Vim Script
    pattern: '^UseVimball'
  - language: VBA
- extensions: ['.w']
  rules:
  - language: OpenEdge ABL
    pattern: '&ANALYZE-SUSPEND _UIB-CODE-BLOCK _CUSTOM _DEFINITIONS'
  - language: CWeb
    pattern: '^@(<|\w+\.)'
- extensions: ['.x']
  rules:
  - language: DirectX 3D File
    pattern:  '^xof 030(2|3)(?:txt|bin|tzip|bzip)\b'
  - language: RPC
    pattern: '\b(program|version)\s+\w+\s*{|\bunion\s+\w+\s+switch\s*\('
  - language: Logos
    pattern: '^%(end|ctor|hook|group)\b'
  - language: Linker Script
    pattern: 'OUTPUT_ARCH\(|OUTPUT_FORMAT\(|SECTIONS'
- extensions: ['.yaml', '.yml']
  rules:
  - language: MiniYAML
    pattern: '^\t+.*?[^\s:].*?:'
    negative_pattern: '---'
  - language: OASv2-yaml
    pattern: 'swagger:\s?''?"?2.[0-9.]+''?"?'
  - language: OASv3-yaml
    pattern: 'openapi:\s?''?"?3.[0-9.]+''?"?'
  - language: YAML
- extensions: ['.yy']
  rules:
  - language: JSON
    pattern: '\"modelName\"\:\s*\"GM'
  - language: Yacc
named_patterns:
  cpp:
  - '^\s*#\s*include <(cstdint|string|vector|map|list|array|bitset|queue|stack|forward_list|unordered_map|unordered_set|(i|o|io)stream)>'
  - '^\s*template\s*<'
  - '^[ \t]*(try|constexpr)'
  - '^[ \t]*catch\s*\('
  - '^[ \t]*(class|(using[ \t]+)?namespace)\s+\w+'
  - '^[ \t]*(private|public|protected):$'
  - 'std::\w+'
  euphoria:
  - '^\s*namespace\s'
  - '^\s*(?:public\s+)?include\s'
  - '^\s*(?:(?:public|export|global)\s+)?(?:atom|constant|enum|function|integer|object|procedure|sequence|type)\s'
  fortran: '^(?i:[c*][^abd-z]|      (subroutine|program|end|data)\s|\s*!)'
  gsc:
  - '^\s*#\s*(?:using|insert|include|define|namespace)[ \t]+\w'
  - '^\s*(?>(?:autoexec|private)\s+){0,2}function\s+(?>(?:autoexec|private)\s+){0,2}\w+\s*\('
  - '\b(?:level|self)[ \t]+thread[ \t]+(?:\[\[[ \t]*(?>\w+\.)*\w+[ \t]*\]\]|\w+)[ \t]*\([^\r\n\)]*\)[ \t]*;'
  - '^[ \t]*#[ \t]*(?:precache|using_animtree)[ \t]*\('
  key_equals_value: '^[^#!;][^=]*='
  m68k:
  - '(?im)\bmoveq(?:\.l)?\s+#(?:\$-?[0-9a-f]{1,3}|%[0-1]{1,8}|-?[0-9]{1,3}),\s*d[0-7]\b'
  - '(?im)^\s*move(?:\.[bwl])?\s+(?:sr|usp),\s*[^\s]+'
  - '(?im)^\s*move\.[bwl]\s+.*\b[ad]\d'
  - '(?im)^\s*movem\.[bwl]\b'
  - '(?im)^\s*move[mp](?:\.[wl])?\b'
  - '(?im)^\s*btst\b'
  - '(?im)^\s*dbra\b'
  man-heading:  '^[.''][ \t]*SH +(?:[^"\s]+|"[^"\s]+)'
  man-title:    '^[.''][ \t]*TH +(?:[^"\s]+|"[^"]+") +"?(?:[1-9]|@[^\s@]+@)'
  mdoc-date:    '^[.''][ \t]*Dd +(?:[^"\s]+|"[^"]+")'
  mdoc-heading: '^[.''][ \t]*Sh +(?:[^"\s]|"[^"]+")'
  mdoc-title:   '^[.''][ \t]*Dt +(?:[^"\s]+|"[^"]+") +"?(?:[1-9]|@[^\s@]+@)'
  objectivec: '^\s*(@(interface|class|protocol|property|end|synchronised|selector|implementation)\b|#import\s+.+\.h[">])'
  perl5: '\buse\s+(?:strict\b|v?5\.)'
  perl6: '^\s*(?:use\s+v6\b|\bmodule\b|\b(?:my\s+)?class\b)'
  vb-class: '^\s*VERSION\s+[0-9]\.[0-9]\s+CLASS'
  vb-form: '^\s*VERSION\s+[0-9]\.[0-9]{2}'