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+"""
+ pygments.lexers.ml
+ ~~~~~~~~~~~~~~~~~~
+
+ Lexers for ML family languages.
+
+ :copyright: Copyright 2006-2023 by the Pygments team, see AUTHORS.
+ :license: BSD, see LICENSE for details.
+"""
+
+import re
+
+from pygments.lexer import RegexLexer, include, bygroups, default, words
+from pygments.token import Text, Comment, Operator, Keyword, Name, String, \
+ Number, Punctuation, Error
+
+__all__ = ['SMLLexer', 'OcamlLexer', 'OpaLexer', 'ReasonLexer', 'FStarLexer']
+
+
+class SMLLexer(RegexLexer):
+ """
+ For the Standard ML language.
+
+ .. versionadded:: 1.5
+ """
+
+ name = 'Standard ML'
+ aliases = ['sml']
+ filenames = ['*.sml', '*.sig', '*.fun']
+ mimetypes = ['text/x-standardml', 'application/x-standardml']
+
+ alphanumid_reserved = {
+ # Core
+ 'abstype', 'and', 'andalso', 'as', 'case', 'datatype', 'do', 'else',
+ 'end', 'exception', 'fn', 'fun', 'handle', 'if', 'in', 'infix',
+ 'infixr', 'let', 'local', 'nonfix', 'of', 'op', 'open', 'orelse',
+ 'raise', 'rec', 'then', 'type', 'val', 'with', 'withtype', 'while',
+ # Modules
+ 'eqtype', 'functor', 'include', 'sharing', 'sig', 'signature',
+ 'struct', 'structure', 'where',
+ }
+
+ symbolicid_reserved = {
+ # Core
+ ':', r'\|', '=', '=>', '->', '#',
+ # Modules
+ ':>',
+ }
+
+ nonid_reserved = {'(', ')', '[', ']', '{', '}', ',', ';', '...', '_'}
+
+ alphanumid_re = r"[a-zA-Z][\w']*"
+ symbolicid_re = r"[!%&$#+\-/:<=>?@\\~`^|*]+"
+
+ # A character constant is a sequence of the form #s, where s is a string
+ # constant denoting a string of size one character. This setup just parses
+ # the entire string as either a String.Double or a String.Char (depending
+ # on the argument), even if the String.Char is an erroneous
+ # multiple-character string.
+ def stringy(whatkind):
+ return [
+ (r'[^"\\]', whatkind),
+ (r'\\[\\"abtnvfr]', String.Escape),
+ # Control-character notation is used for codes < 32,
+ # where \^@ == \000
+ (r'\\\^[\x40-\x5e]', String.Escape),
+ # Docs say 'decimal digits'
+ (r'\\[0-9]{3}', String.Escape),
+ (r'\\u[0-9a-fA-F]{4}', String.Escape),
+ (r'\\\s+\\', String.Interpol),
+ (r'"', whatkind, '#pop'),
+ ]
+
+ # Callbacks for distinguishing tokens and reserved words
+ def long_id_callback(self, match):
+ if match.group(1) in self.alphanumid_reserved:
+ token = Error
+ else:
+ token = Name.Namespace
+ yield match.start(1), token, match.group(1)
+ yield match.start(2), Punctuation, match.group(2)
+
+ def end_id_callback(self, match):
+ if match.group(1) in self.alphanumid_reserved:
+ token = Error
+ elif match.group(1) in self.symbolicid_reserved:
+ token = Error
+ else:
+ token = Name
+ yield match.start(1), token, match.group(1)
+
+ def id_callback(self, match):
+ str = match.group(1)
+ if str in self.alphanumid_reserved:
+ token = Keyword.Reserved
+ elif str in self.symbolicid_reserved:
+ token = Punctuation
+ else:
+ token = Name
+ yield match.start(1), token, str
+
+ tokens = {
+ # Whitespace and comments are (almost) everywhere
+ 'whitespace': [
+ (r'\s+', Text),
+ (r'\(\*', Comment.Multiline, 'comment'),
+ ],
+
+ 'delimiters': [
+ # This lexer treats these delimiters specially:
+ # Delimiters define scopes, and the scope is how the meaning of
+ # the `|' is resolved - is it a case/handle expression, or function
+ # definition by cases? (This is not how the Definition works, but
+ # it's how MLton behaves, see http://mlton.org/SMLNJDeviations)
+ (r'\(|\[|\{', Punctuation, 'main'),
+ (r'\)|\]|\}', Punctuation, '#pop'),
+ (r'\b(let|if|local)\b(?!\')', Keyword.Reserved, ('main', 'main')),
+ (r'\b(struct|sig|while)\b(?!\')', Keyword.Reserved, 'main'),
+ (r'\b(do|else|end|in|then)\b(?!\')', Keyword.Reserved, '#pop'),
+ ],
+
+ 'core': [
+ # Punctuation that doesn't overlap symbolic identifiers
+ (r'(%s)' % '|'.join(re.escape(z) for z in nonid_reserved),
+ Punctuation),
+
+ # Special constants: strings, floats, numbers in decimal and hex
+ (r'#"', String.Char, 'char'),
+ (r'"', String.Double, 'string'),
+ (r'~?0x[0-9a-fA-F]+', Number.Hex),
+ (r'0wx[0-9a-fA-F]+', Number.Hex),
+ (r'0w\d+', Number.Integer),
+ (r'~?\d+\.\d+[eE]~?\d+', Number.Float),
+ (r'~?\d+\.\d+', Number.Float),
+ (r'~?\d+[eE]~?\d+', Number.Float),
+ (r'~?\d+', Number.Integer),
+
+ # Labels
+ (r'#\s*[1-9][0-9]*', Name.Label),
+ (r'#\s*(%s)' % alphanumid_re, Name.Label),
+ (r'#\s+(%s)' % symbolicid_re, Name.Label),
+ # Some reserved words trigger a special, local lexer state change
+ (r'\b(datatype|abstype)\b(?!\')', Keyword.Reserved, 'dname'),
+ (r'\b(exception)\b(?!\')', Keyword.Reserved, 'ename'),
+ (r'\b(functor|include|open|signature|structure)\b(?!\')',
+ Keyword.Reserved, 'sname'),
+ (r'\b(type|eqtype)\b(?!\')', Keyword.Reserved, 'tname'),
+
+ # Regular identifiers, long and otherwise
+ (r'\'[\w\']*', Name.Decorator),
+ (r'(%s)(\.)' % alphanumid_re, long_id_callback, "dotted"),
+ (r'(%s)' % alphanumid_re, id_callback),
+ (r'(%s)' % symbolicid_re, id_callback),
+ ],
+ 'dotted': [
+ (r'(%s)(\.)' % alphanumid_re, long_id_callback),
+ (r'(%s)' % alphanumid_re, end_id_callback, "#pop"),
+ (r'(%s)' % symbolicid_re, end_id_callback, "#pop"),
+ (r'\s+', Error),
+ (r'\S+', Error),
+ ],
+
+
+ # Main parser (prevents errors in files that have scoping errors)
+ 'root': [
+ default('main')
+ ],
+
+ # In this scope, I expect '|' to not be followed by a function name,
+ # and I expect 'and' to be followed by a binding site
+ 'main': [
+ include('whitespace'),
+
+ # Special behavior of val/and/fun
+ (r'\b(val|and)\b(?!\')', Keyword.Reserved, 'vname'),
+ (r'\b(fun)\b(?!\')', Keyword.Reserved,
+ ('#pop', 'main-fun', 'fname')),
+
+ include('delimiters'),
+ include('core'),
+ (r'\S+', Error),
+ ],
+
+ # In this scope, I expect '|' and 'and' to be followed by a function
+ 'main-fun': [
+ include('whitespace'),
+
+ (r'\s', Text),
+ (r'\(\*', Comment.Multiline, 'comment'),
+
+ # Special behavior of val/and/fun
+ (r'\b(fun|and)\b(?!\')', Keyword.Reserved, 'fname'),
+ (r'\b(val)\b(?!\')', Keyword.Reserved,
+ ('#pop', 'main', 'vname')),
+
+ # Special behavior of '|' and '|'-manipulating keywords
+ (r'\|', Punctuation, 'fname'),
+ (r'\b(case|handle)\b(?!\')', Keyword.Reserved,
+ ('#pop', 'main')),
+
+ include('delimiters'),
+ include('core'),
+ (r'\S+', Error),
+ ],
+
+ # Character and string parsers
+ 'char': stringy(String.Char),
+ 'string': stringy(String.Double),
+
+ 'breakout': [
+ (r'(?=\b(%s)\b(?!\'))' % '|'.join(alphanumid_reserved), Text, '#pop'),
+ ],
+
+ # Dealing with what comes after module system keywords
+ 'sname': [
+ include('whitespace'),
+ include('breakout'),
+
+ (r'(%s)' % alphanumid_re, Name.Namespace),
+ default('#pop'),
+ ],
+
+ # Dealing with what comes after the 'fun' (or 'and' or '|') keyword
+ 'fname': [
+ include('whitespace'),
+ (r'\'[\w\']*', Name.Decorator),
+ (r'\(', Punctuation, 'tyvarseq'),
+
+ (r'(%s)' % alphanumid_re, Name.Function, '#pop'),
+ (r'(%s)' % symbolicid_re, Name.Function, '#pop'),
+
+ # Ignore interesting function declarations like "fun (x + y) = ..."
+ default('#pop'),
+ ],
+
+ # Dealing with what comes after the 'val' (or 'and') keyword
+ 'vname': [
+ include('whitespace'),
+ (r'\'[\w\']*', Name.Decorator),
+ (r'\(', Punctuation, 'tyvarseq'),
+
+ (r'(%s)(\s*)(=(?!%s))' % (alphanumid_re, symbolicid_re),
+ bygroups(Name.Variable, Text, Punctuation), '#pop'),
+ (r'(%s)(\s*)(=(?!%s))' % (symbolicid_re, symbolicid_re),
+ bygroups(Name.Variable, Text, Punctuation), '#pop'),
+ (r'(%s)' % alphanumid_re, Name.Variable, '#pop'),
+ (r'(%s)' % symbolicid_re, Name.Variable, '#pop'),
+
+ # Ignore interesting patterns like 'val (x, y)'
+ default('#pop'),
+ ],
+
+ # Dealing with what comes after the 'type' (or 'and') keyword
+ 'tname': [
+ include('whitespace'),
+ include('breakout'),
+
+ (r'\'[\w\']*', Name.Decorator),
+ (r'\(', Punctuation, 'tyvarseq'),
+ (r'=(?!%s)' % symbolicid_re, Punctuation, ('#pop', 'typbind')),
+
+ (r'(%s)' % alphanumid_re, Keyword.Type),
+ (r'(%s)' % symbolicid_re, Keyword.Type),
+ (r'\S+', Error, '#pop'),
+ ],
+
+ # A type binding includes most identifiers
+ 'typbind': [
+ include('whitespace'),
+
+ (r'\b(and)\b(?!\')', Keyword.Reserved, ('#pop', 'tname')),
+
+ include('breakout'),
+ include('core'),
+ (r'\S+', Error, '#pop'),
+ ],
+
+ # Dealing with what comes after the 'datatype' (or 'and') keyword
+ 'dname': [
+ include('whitespace'),
+ include('breakout'),
+
+ (r'\'[\w\']*', Name.Decorator),
+ (r'\(', Punctuation, 'tyvarseq'),
+ (r'(=)(\s*)(datatype)',
+ bygroups(Punctuation, Text, Keyword.Reserved), '#pop'),
+ (r'=(?!%s)' % symbolicid_re, Punctuation,
+ ('#pop', 'datbind', 'datcon')),
+
+ (r'(%s)' % alphanumid_re, Keyword.Type),
+ (r'(%s)' % symbolicid_re, Keyword.Type),
+ (r'\S+', Error, '#pop'),
+ ],
+
+ # common case - A | B | C of int
+ 'datbind': [
+ include('whitespace'),
+
+ (r'\b(and)\b(?!\')', Keyword.Reserved, ('#pop', 'dname')),
+ (r'\b(withtype)\b(?!\')', Keyword.Reserved, ('#pop', 'tname')),
+ (r'\b(of)\b(?!\')', Keyword.Reserved),
+
+ (r'(\|)(\s*)(%s)' % alphanumid_re,
+ bygroups(Punctuation, Text, Name.Class)),
+ (r'(\|)(\s+)(%s)' % symbolicid_re,
+ bygroups(Punctuation, Text, Name.Class)),
+
+ include('breakout'),
+ include('core'),
+ (r'\S+', Error),
+ ],
+
+ # Dealing with what comes after an exception
+ 'ename': [
+ include('whitespace'),
+
+ (r'(and\b)(\s+)(%s)' % alphanumid_re,
+ bygroups(Keyword.Reserved, Text, Name.Class)),
+ (r'(and\b)(\s*)(%s)' % symbolicid_re,
+ bygroups(Keyword.Reserved, Text, Name.Class)),
+ (r'\b(of)\b(?!\')', Keyword.Reserved),
+ (r'(%s)|(%s)' % (alphanumid_re, symbolicid_re), Name.Class),
+
+ default('#pop'),
+ ],
+
+ 'datcon': [
+ include('whitespace'),
+ (r'(%s)' % alphanumid_re, Name.Class, '#pop'),
+ (r'(%s)' % symbolicid_re, Name.Class, '#pop'),
+ (r'\S+', Error, '#pop'),
+ ],
+
+ # Series of type variables
+ 'tyvarseq': [
+ (r'\s', Text),
+ (r'\(\*', Comment.Multiline, 'comment'),
+
+ (r'\'[\w\']*', Name.Decorator),
+ (alphanumid_re, Name),
+ (r',', Punctuation),
+ (r'\)', Punctuation, '#pop'),
+ (symbolicid_re, Name),
+ ],
+
+ 'comment': [
+ (r'[^(*)]', Comment.Multiline),
+ (r'\(\*', Comment.Multiline, '#push'),
+ (r'\*\)', Comment.Multiline, '#pop'),
+ (r'[(*)]', Comment.Multiline),
+ ],
+ }
+
+
+class OcamlLexer(RegexLexer):
+ """
+ For the OCaml language.
+
+ .. versionadded:: 0.7
+ """
+
+ name = 'OCaml'
+ url = 'https://ocaml.org/'
+ aliases = ['ocaml']
+ filenames = ['*.ml', '*.mli', '*.mll', '*.mly']
+ mimetypes = ['text/x-ocaml']
+
+ keywords = (
+ 'and', 'as', 'assert', 'begin', 'class', 'constraint', 'do', 'done',
+ 'downto', 'else', 'end', 'exception', 'external', 'false',
+ 'for', 'fun', 'function', 'functor', 'if', 'in', 'include',
+ 'inherit', 'initializer', 'lazy', 'let', 'match', 'method',
+ 'module', 'mutable', 'new', 'object', 'of', 'open', 'private',
+ 'raise', 'rec', 'sig', 'struct', 'then', 'to', 'true', 'try',
+ 'type', 'val', 'virtual', 'when', 'while', 'with',
+ )
+ keyopts = (
+ '!=', '#', '&', '&&', r'\(', r'\)', r'\*', r'\+', ',', '-',
+ r'-\.', '->', r'\.', r'\.\.', ':', '::', ':=', ':>', ';', ';;', '<',
+ '<-', '=', '>', '>]', r'>\}', r'\?', r'\?\?', r'\[', r'\[<', r'\[>',
+ r'\[\|', ']', '_', '`', r'\{', r'\{<', r'\|', r'\|]', r'\}', '~'
+ )
+
+ operators = r'[!$%&*+\./:<=>?@^|~-]'
+ word_operators = ('asr', 'land', 'lor', 'lsl', 'lxor', 'mod', 'or')
+ prefix_syms = r'[!?~]'
+ infix_syms = r'[=<>@^|&+\*/$%-]'
+ primitives = ('unit', 'int', 'float', 'bool', 'string', 'char', 'list', 'array')
+
+ tokens = {
+ 'escape-sequence': [
+ (r'\\[\\"\'ntbr]', String.Escape),
+ (r'\\[0-9]{3}', String.Escape),
+ (r'\\x[0-9a-fA-F]{2}', String.Escape),
+ ],
+ 'root': [
+ (r'\s+', Text),
+ (r'false|true|\(\)|\[\]', Name.Builtin.Pseudo),
+ (r'\b([A-Z][\w\']*)(?=\s*\.)', Name.Namespace, 'dotted'),
+ (r'\b([A-Z][\w\']*)', Name.Class),
+ (r'\(\*(?![)])', Comment, 'comment'),
+ (r'\b(%s)\b' % '|'.join(keywords), Keyword),
+ (r'(%s)' % '|'.join(keyopts[::-1]), Operator),
+ (r'(%s|%s)?%s' % (infix_syms, prefix_syms, operators), Operator),
+ (r'\b(%s)\b' % '|'.join(word_operators), Operator.Word),
+ (r'\b(%s)\b' % '|'.join(primitives), Keyword.Type),
+
+ (r"[^\W\d][\w']*", Name),
+
+ (r'-?\d[\d_]*(.[\d_]*)?([eE][+\-]?\d[\d_]*)', Number.Float),
+ (r'0[xX][\da-fA-F][\da-fA-F_]*', Number.Hex),
+ (r'0[oO][0-7][0-7_]*', Number.Oct),
+ (r'0[bB][01][01_]*', Number.Bin),
+ (r'\d[\d_]*', Number.Integer),
+
+ (r"'(?:(\\[\\\"'ntbr ])|(\\[0-9]{3})|(\\x[0-9a-fA-F]{2}))'",
+ String.Char),
+ (r"'.'", String.Char),
+ (r"'", Keyword), # a stray quote is another syntax element
+
+ (r'"', String.Double, 'string'),
+
+ (r'[~?][a-z][\w\']*:', Name.Variable),
+ ],
+ 'comment': [
+ (r'[^(*)]+', Comment),
+ (r'\(\*', Comment, '#push'),
+ (r'\*\)', Comment, '#pop'),
+ (r'[(*)]', Comment),
+ ],
+ 'string': [
+ (r'[^\\"]+', String.Double),
+ include('escape-sequence'),
+ (r'\\\n', String.Double),
+ (r'"', String.Double, '#pop'),
+ ],
+ 'dotted': [
+ (r'\s+', Text),
+ (r'\.', Punctuation),
+ (r'[A-Z][\w\']*(?=\s*\.)', Name.Namespace),
+ (r'[A-Z][\w\']*', Name.Class, '#pop'),
+ (r'[a-z_][\w\']*', Name, '#pop'),
+ default('#pop'),
+ ],
+ }
+
+
+class OpaLexer(RegexLexer):
+ """
+ Lexer for the Opa language.
+
+ .. versionadded:: 1.5
+ """
+
+ name = 'Opa'
+ aliases = ['opa']
+ filenames = ['*.opa']
+ mimetypes = ['text/x-opa']
+
+ # most of these aren't strictly keywords
+ # but if you color only real keywords, you might just
+ # as well not color anything
+ keywords = (
+ 'and', 'as', 'begin', 'case', 'client', 'css', 'database', 'db', 'do',
+ 'else', 'end', 'external', 'forall', 'function', 'if', 'import',
+ 'match', 'module', 'or', 'package', 'parser', 'rec', 'server', 'then',
+ 'type', 'val', 'with', 'xml_parser',
+ )
+
+ # matches both stuff and `stuff`
+ ident_re = r'(([a-zA-Z_]\w*)|(`[^`]*`))'
+
+ op_re = r'[.=\-<>,@~%/+?*&^!]'
+ punc_re = r'[()\[\],;|]' # '{' and '}' are treated elsewhere
+ # because they are also used for inserts
+
+ tokens = {
+ # copied from the caml lexer, should be adapted
+ 'escape-sequence': [
+ (r'\\[\\"\'ntr}]', String.Escape),
+ (r'\\[0-9]{3}', String.Escape),
+ (r'\\x[0-9a-fA-F]{2}', String.Escape),
+ ],
+
+ # factorizing these rules, because they are inserted many times
+ 'comments': [
+ (r'/\*', Comment, 'nested-comment'),
+ (r'//.*?$', Comment),
+ ],
+ 'comments-and-spaces': [
+ include('comments'),
+ (r'\s+', Text),
+ ],
+
+ 'root': [
+ include('comments-and-spaces'),
+ # keywords
+ (words(keywords, prefix=r'\b', suffix=r'\b'), Keyword),
+ # directives
+ # we could parse the actual set of directives instead of anything
+ # starting with @, but this is troublesome
+ # because it needs to be adjusted all the time
+ # and assuming we parse only sources that compile, it is useless
+ (r'@' + ident_re + r'\b', Name.Builtin.Pseudo),
+
+ # number literals
+ (r'-?.[\d]+([eE][+\-]?\d+)', Number.Float),
+ (r'-?\d+.\d*([eE][+\-]?\d+)', Number.Float),
+ (r'-?\d+[eE][+\-]?\d+', Number.Float),
+ (r'0[xX][\da-fA-F]+', Number.Hex),
+ (r'0[oO][0-7]+', Number.Oct),
+ (r'0[bB][01]+', Number.Bin),
+ (r'\d+', Number.Integer),
+ # color literals
+ (r'#[\da-fA-F]{3,6}', Number.Integer),
+
+ # string literals
+ (r'"', String.Double, 'string'),
+ # char literal, should be checked because this is the regexp from
+ # the caml lexer
+ (r"'(?:(\\[\\\"'ntbr ])|(\\[0-9]{3})|(\\x[0-9a-fA-F]{2})|.)'",
+ String.Char),
+
+ # this is meant to deal with embedded exprs in strings
+ # every time we find a '}' we pop a state so that if we were
+ # inside a string, we are back in the string state
+ # as a consequence, we must also push a state every time we find a
+ # '{' or else we will have errors when parsing {} for instance
+ (r'\{', Operator, '#push'),
+ (r'\}', Operator, '#pop'),
+
+ # html literals
+ # this is a much more strict that the actual parser,
+ # since a<b would not be parsed as html
+ # but then again, the parser is way too lax, and we can't hope
+ # to have something as tolerant
+ (r'<(?=[a-zA-Z>])', String.Single, 'html-open-tag'),
+
+ # db path
+ # matching the '[_]' in '/a[_]' because it is a part
+ # of the syntax of the db path definition
+ # unfortunately, i don't know how to match the ']' in
+ # /a[1], so this is somewhat inconsistent
+ (r'[@?!]?(/\w+)+(\[_\])?', Name.Variable),
+ # putting the same color on <- as on db path, since
+ # it can be used only to mean Db.write
+ (r'<-(?!'+op_re+r')', Name.Variable),
+
+ # 'modules'
+ # although modules are not distinguished by their names as in caml
+ # the standard library seems to follow the convention that modules
+ # only area capitalized
+ (r'\b([A-Z]\w*)(?=\.)', Name.Namespace),
+
+ # operators
+ # = has a special role because this is the only
+ # way to syntactic distinguish binding constructions
+ # unfortunately, this colors the equal in {x=2} too
+ (r'=(?!'+op_re+r')', Keyword),
+ (r'(%s)+' % op_re, Operator),
+ (r'(%s)+' % punc_re, Operator),
+
+ # coercions
+ (r':', Operator, 'type'),
+ # type variables
+ # we need this rule because we don't parse specially type
+ # definitions so in "type t('a) = ...", "'a" is parsed by 'root'
+ ("'"+ident_re, Keyword.Type),
+
+ # id literal, #something, or #{expr}
+ (r'#'+ident_re, String.Single),
+ (r'#(?=\{)', String.Single),
+
+ # identifiers
+ # this avoids to color '2' in 'a2' as an integer
+ (ident_re, Text),
+
+ # default, not sure if that is needed or not
+ # (r'.', Text),
+ ],
+
+ # it is quite painful to have to parse types to know where they end
+ # this is the general rule for a type
+ # a type is either:
+ # * -> ty
+ # * type-with-slash
+ # * type-with-slash -> ty
+ # * type-with-slash (, type-with-slash)+ -> ty
+ #
+ # the code is pretty funky in here, but this code would roughly
+ # translate in caml to:
+ # let rec type stream =
+ # match stream with
+ # | [< "->"; stream >] -> type stream
+ # | [< ""; stream >] ->
+ # type_with_slash stream
+ # type_lhs_1 stream;
+ # and type_1 stream = ...
+ 'type': [
+ include('comments-and-spaces'),
+ (r'->', Keyword.Type),
+ default(('#pop', 'type-lhs-1', 'type-with-slash')),
+ ],
+
+ # parses all the atomic or closed constructions in the syntax of type
+ # expressions: record types, tuple types, type constructors, basic type
+ # and type variables
+ 'type-1': [
+ include('comments-and-spaces'),
+ (r'\(', Keyword.Type, ('#pop', 'type-tuple')),
+ (r'~?\{', Keyword.Type, ('#pop', 'type-record')),
+ (ident_re+r'\(', Keyword.Type, ('#pop', 'type-tuple')),
+ (ident_re, Keyword.Type, '#pop'),
+ ("'"+ident_re, Keyword.Type),
+ # this case is not in the syntax but sometimes
+ # we think we are parsing types when in fact we are parsing
+ # some css, so we just pop the states until we get back into
+ # the root state
+ default('#pop'),
+ ],
+
+ # type-with-slash is either:
+ # * type-1
+ # * type-1 (/ type-1)+
+ 'type-with-slash': [
+ include('comments-and-spaces'),
+ default(('#pop', 'slash-type-1', 'type-1')),
+ ],
+ 'slash-type-1': [
+ include('comments-and-spaces'),
+ ('/', Keyword.Type, ('#pop', 'type-1')),
+ # same remark as above
+ default('#pop'),
+ ],
+
+ # we go in this state after having parsed a type-with-slash
+ # while trying to parse a type
+ # and at this point we must determine if we are parsing an arrow
+ # type (in which case we must continue parsing) or not (in which
+ # case we stop)
+ 'type-lhs-1': [
+ include('comments-and-spaces'),
+ (r'->', Keyword.Type, ('#pop', 'type')),
+ (r'(?=,)', Keyword.Type, ('#pop', 'type-arrow')),
+ default('#pop'),
+ ],
+ 'type-arrow': [
+ include('comments-and-spaces'),
+ # the look ahead here allows to parse f(x : int, y : float -> truc)
+ # correctly
+ (r',(?=[^:]*?->)', Keyword.Type, 'type-with-slash'),
+ (r'->', Keyword.Type, ('#pop', 'type')),
+ # same remark as above
+ default('#pop'),
+ ],
+
+ # no need to do precise parsing for tuples and records
+ # because they are closed constructions, so we can simply
+ # find the closing delimiter
+ # note that this function would be not work if the source
+ # contained identifiers like `{)` (although it could be patched
+ # to support it)
+ 'type-tuple': [
+ include('comments-and-spaces'),
+ (r'[^()/*]+', Keyword.Type),
+ (r'[/*]', Keyword.Type),
+ (r'\(', Keyword.Type, '#push'),
+ (r'\)', Keyword.Type, '#pop'),
+ ],
+ 'type-record': [
+ include('comments-and-spaces'),
+ (r'[^{}/*]+', Keyword.Type),
+ (r'[/*]', Keyword.Type),
+ (r'\{', Keyword.Type, '#push'),
+ (r'\}', Keyword.Type, '#pop'),
+ ],
+
+ # 'type-tuple': [
+ # include('comments-and-spaces'),
+ # (r'\)', Keyword.Type, '#pop'),
+ # default(('#pop', 'type-tuple-1', 'type-1')),
+ # ],
+ # 'type-tuple-1': [
+ # include('comments-and-spaces'),
+ # (r',?\s*\)', Keyword.Type, '#pop'), # ,) is a valid end of tuple, in (1,)
+ # (r',', Keyword.Type, 'type-1'),
+ # ],
+ # 'type-record':[
+ # include('comments-and-spaces'),
+ # (r'\}', Keyword.Type, '#pop'),
+ # (r'~?(?:\w+|`[^`]*`)', Keyword.Type, 'type-record-field-expr'),
+ # ],
+ # 'type-record-field-expr': [
+ #
+ # ],
+
+ 'nested-comment': [
+ (r'[^/*]+', Comment),
+ (r'/\*', Comment, '#push'),
+ (r'\*/', Comment, '#pop'),
+ (r'[/*]', Comment),
+ ],
+
+ # the copy pasting between string and single-string
+ # is kinda sad. Is there a way to avoid that??
+ 'string': [
+ (r'[^\\"{]+', String.Double),
+ (r'"', String.Double, '#pop'),
+ (r'\{', Operator, 'root'),
+ include('escape-sequence'),
+ ],
+ 'single-string': [
+ (r'[^\\\'{]+', String.Double),
+ (r'\'', String.Double, '#pop'),
+ (r'\{', Operator, 'root'),
+ include('escape-sequence'),
+ ],
+
+ # all the html stuff
+ # can't really reuse some existing html parser
+ # because we must be able to parse embedded expressions
+
+ # we are in this state after someone parsed the '<' that
+ # started the html literal
+ 'html-open-tag': [
+ (r'[\w\-:]+', String.Single, ('#pop', 'html-attr')),
+ (r'>', String.Single, ('#pop', 'html-content')),
+ ],
+
+ # we are in this state after someone parsed the '</' that
+ # started the end of the closing tag
+ 'html-end-tag': [
+ # this is a star, because </> is allowed
+ (r'[\w\-:]*>', String.Single, '#pop'),
+ ],
+
+ # we are in this state after having parsed '<ident(:ident)?'
+ # we thus parse a possibly empty list of attributes
+ 'html-attr': [
+ (r'\s+', Text),
+ (r'[\w\-:]+=', String.Single, 'html-attr-value'),
+ (r'/>', String.Single, '#pop'),
+ (r'>', String.Single, ('#pop', 'html-content')),
+ ],
+
+ 'html-attr-value': [
+ (r"'", String.Single, ('#pop', 'single-string')),
+ (r'"', String.Single, ('#pop', 'string')),
+ (r'#'+ident_re, String.Single, '#pop'),
+ (r'#(?=\{)', String.Single, ('#pop', 'root')),
+ (r'[^"\'{`=<>]+', String.Single, '#pop'),
+ (r'\{', Operator, ('#pop', 'root')), # this is a tail call!
+ ],
+
+ # we should probably deal with '\' escapes here
+ 'html-content': [
+ (r'<!--', Comment, 'html-comment'),
+ (r'</', String.Single, ('#pop', 'html-end-tag')),
+ (r'<', String.Single, 'html-open-tag'),
+ (r'\{', Operator, 'root'),
+ (r'[^<{]+', String.Single),
+ ],
+
+ 'html-comment': [
+ (r'-->', Comment, '#pop'),
+ (r'[^\-]+|-', Comment),
+ ],
+ }
+
+
+class ReasonLexer(RegexLexer):
+ """
+ For the ReasonML language.
+
+ .. versionadded:: 2.6
+ """
+
+ name = 'ReasonML'
+ url = 'https://reasonml.github.io/'
+ aliases = ['reasonml', 'reason']
+ filenames = ['*.re', '*.rei']
+ mimetypes = ['text/x-reasonml']
+
+ keywords = (
+ 'as', 'assert', 'begin', 'class', 'constraint', 'do', 'done', 'downto',
+ 'else', 'end', 'exception', 'external', 'false', 'for', 'fun', 'esfun',
+ 'function', 'functor', 'if', 'in', 'include', 'inherit', 'initializer', 'lazy',
+ 'let', 'switch', 'module', 'pub', 'mutable', 'new', 'nonrec', 'object', 'of',
+ 'open', 'pri', 'rec', 'sig', 'struct', 'then', 'to', 'true', 'try',
+ 'type', 'val', 'virtual', 'when', 'while', 'with',
+ )
+ keyopts = (
+ '!=', '#', '&', '&&', r'\(', r'\)', r'\*', r'\+', ',', '-',
+ r'-\.', '=>', r'\.', r'\.\.', r'\.\.\.', ':', '::', ':=', ':>', ';', ';;', '<',
+ '<-', '=', '>', '>]', r'>\}', r'\?', r'\?\?', r'\[', r'\[<', r'\[>',
+ r'\[\|', ']', '_', '`', r'\{', r'\{<', r'\|', r'\|\|', r'\|]', r'\}', '~'
+ )
+
+ operators = r'[!$%&*+\./:<=>?@^|~-]'
+ word_operators = ('and', 'asr', 'land', 'lor', 'lsl', 'lsr', 'lxor', 'mod', 'or')
+ prefix_syms = r'[!?~]'
+ infix_syms = r'[=<>@^|&+\*/$%-]'
+ primitives = ('unit', 'int', 'float', 'bool', 'string', 'char', 'list', 'array')
+
+ tokens = {
+ 'escape-sequence': [
+ (r'\\[\\"\'ntbr]', String.Escape),
+ (r'\\[0-9]{3}', String.Escape),
+ (r'\\x[0-9a-fA-F]{2}', String.Escape),
+ ],
+ 'root': [
+ (r'\s+', Text),
+ (r'false|true|\(\)|\[\]', Name.Builtin.Pseudo),
+ (r'\b([A-Z][\w\']*)(?=\s*\.)', Name.Namespace, 'dotted'),
+ (r'\b([A-Z][\w\']*)', Name.Class),
+ (r'//.*?\n', Comment.Single),
+ (r'\/\*(?!/)', Comment.Multiline, 'comment'),
+ (r'\b(%s)\b' % '|'.join(keywords), Keyword),
+ (r'(%s)' % '|'.join(keyopts[::-1]), Operator.Word),
+ (r'(%s|%s)?%s' % (infix_syms, prefix_syms, operators), Operator),
+ (r'\b(%s)\b' % '|'.join(word_operators), Operator.Word),
+ (r'\b(%s)\b' % '|'.join(primitives), Keyword.Type),
+
+ (r"[^\W\d][\w']*", Name),
+
+ (r'-?\d[\d_]*(.[\d_]*)?([eE][+\-]?\d[\d_]*)', Number.Float),
+ (r'0[xX][\da-fA-F][\da-fA-F_]*', Number.Hex),
+ (r'0[oO][0-7][0-7_]*', Number.Oct),
+ (r'0[bB][01][01_]*', Number.Bin),
+ (r'\d[\d_]*', Number.Integer),
+
+ (r"'(?:(\\[\\\"'ntbr ])|(\\[0-9]{3})|(\\x[0-9a-fA-F]{2}))'",
+ String.Char),
+ (r"'.'", String.Char),
+ (r"'", Keyword),
+
+ (r'"', String.Double, 'string'),
+
+ (r'[~?][a-z][\w\']*:', Name.Variable),
+ ],
+ 'comment': [
+ (r'[^/*]+', Comment.Multiline),
+ (r'\/\*', Comment.Multiline, '#push'),
+ (r'\*\/', Comment.Multiline, '#pop'),
+ (r'\*', Comment.Multiline),
+ ],
+ 'string': [
+ (r'[^\\"]+', String.Double),
+ include('escape-sequence'),
+ (r'\\\n', String.Double),
+ (r'"', String.Double, '#pop'),
+ ],
+ 'dotted': [
+ (r'\s+', Text),
+ (r'\.', Punctuation),
+ (r'[A-Z][\w\']*(?=\s*\.)', Name.Namespace),
+ (r'[A-Z][\w\']*', Name.Class, '#pop'),
+ (r'[a-z_][\w\']*', Name, '#pop'),
+ default('#pop'),
+ ],
+ }
+
+
+class FStarLexer(RegexLexer):
+ """
+ For the F* language.
+ .. versionadded:: 2.7
+ """
+
+ name = 'FStar'
+ url = 'https://www.fstar-lang.org/'
+ aliases = ['fstar']
+ filenames = ['*.fst', '*.fsti']
+ mimetypes = ['text/x-fstar']
+
+ keywords = (
+ 'abstract', 'attributes', 'noeq', 'unopteq', 'and'
+ 'begin', 'by', 'default', 'effect', 'else', 'end', 'ensures',
+ 'exception', 'exists', 'false', 'forall', 'fun', 'function', 'if',
+ 'in', 'include', 'inline', 'inline_for_extraction', 'irreducible',
+ 'logic', 'match', 'module', 'mutable', 'new', 'new_effect', 'noextract',
+ 'of', 'open', 'opaque', 'private', 'range_of', 'reifiable',
+ 'reify', 'reflectable', 'requires', 'set_range_of', 'sub_effect',
+ 'synth', 'then', 'total', 'true', 'try', 'type', 'unfold', 'unfoldable',
+ 'val', 'when', 'with', 'not'
+ )
+ decl_keywords = ('let', 'rec')
+ assume_keywords = ('assume', 'admit', 'assert', 'calc')
+ keyopts = (
+ r'~', r'-', r'/\\', r'\\/', r'<:', r'<@', r'\(\|', r'\|\)', r'#', r'u#',
+ r'&', r'\(', r'\)', r'\(\)', r',', r'~>', r'->', r'<-', r'<--', r'<==>',
+ r'==>', r'\.', r'\?', r'\?\.', r'\.\[', r'\.\(', r'\.\(\|', r'\.\[\|',
+ r'\{:pattern', r':', r'::', r':=', r';', r';;', r'=', r'%\[', r'!\{',
+ r'\[', r'\[@', r'\[\|', r'\|>', r'\]', r'\|\]', r'\{', r'\|', r'\}', r'\$'
+ )
+
+ operators = r'[!$%&*+\./:<=>?@^|~-]'
+ prefix_syms = r'[!?~]'
+ infix_syms = r'[=<>@^|&+\*/$%-]'
+ primitives = ('unit', 'int', 'float', 'bool', 'string', 'char', 'list', 'array')
+
+ tokens = {
+ 'escape-sequence': [
+ (r'\\[\\"\'ntbr]', String.Escape),
+ (r'\\[0-9]{3}', String.Escape),
+ (r'\\x[0-9a-fA-F]{2}', String.Escape),
+ ],
+ 'root': [
+ (r'\s+', Text),
+ (r'false|true|False|True|\(\)|\[\]', Name.Builtin.Pseudo),
+ (r'\b([A-Z][\w\']*)(?=\s*\.)', Name.Namespace, 'dotted'),
+ (r'\b([A-Z][\w\']*)', Name.Class),
+ (r'\(\*(?![)])', Comment, 'comment'),
+ (r'\/\/.+$', Comment),
+ (r'\b(%s)\b' % '|'.join(keywords), Keyword),
+ (r'\b(%s)\b' % '|'.join(assume_keywords), Name.Exception),
+ (r'\b(%s)\b' % '|'.join(decl_keywords), Keyword.Declaration),
+ (r'(%s)' % '|'.join(keyopts[::-1]), Operator),
+ (r'(%s|%s)?%s' % (infix_syms, prefix_syms, operators), Operator),
+ (r'\b(%s)\b' % '|'.join(primitives), Keyword.Type),
+
+ (r"[^\W\d][\w']*", Name),
+
+ (r'-?\d[\d_]*(.[\d_]*)?([eE][+\-]?\d[\d_]*)', Number.Float),
+ (r'0[xX][\da-fA-F][\da-fA-F_]*', Number.Hex),
+ (r'0[oO][0-7][0-7_]*', Number.Oct),
+ (r'0[bB][01][01_]*', Number.Bin),
+ (r'\d[\d_]*', Number.Integer),
+
+ (r"'(?:(\\[\\\"'ntbr ])|(\\[0-9]{3})|(\\x[0-9a-fA-F]{2}))'",
+ String.Char),
+ (r"'.'", String.Char),
+ (r"'", Keyword), # a stray quote is another syntax element
+ (r"\`([\w\'.]+)\`", Operator.Word), # for infix applications
+ (r"\`", Keyword), # for quoting
+ (r'"', String.Double, 'string'),
+
+ (r'[~?][a-z][\w\']*:', Name.Variable),
+ ],
+ 'comment': [
+ (r'[^(*)]+', Comment),
+ (r'\(\*', Comment, '#push'),
+ (r'\*\)', Comment, '#pop'),
+ (r'[(*)]', Comment),
+ ],
+ 'string': [
+ (r'[^\\"]+', String.Double),
+ include('escape-sequence'),
+ (r'\\\n', String.Double),
+ (r'"', String.Double, '#pop'),
+ ],
+ 'dotted': [
+ (r'\s+', Text),
+ (r'\.', Punctuation),
+ (r'[A-Z][\w\']*(?=\s*\.)', Name.Namespace),
+ (r'[A-Z][\w\']*', Name.Class, '#pop'),
+ (r'[a-z_][\w\']*', Name, '#pop'),
+ default('#pop'),
+ ],
+ }
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 00:54:32 +0000