252 lines
8.5 KiB
Python
252 lines
8.5 KiB
Python
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"""
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pygments.lexers.prql
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~~~~~~~~~~~~~~~~~~~~
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Lexer for the PRQL query language.
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:copyright: Copyright 2006-2024 by the Pygments team, see AUTHORS.
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:license: BSD, see LICENSE for details.
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"""
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from pygments.lexer import RegexLexer, combined, words, include, bygroups
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from pygments.token import Comment, Literal, Keyword, Name, Number, Operator, \
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Punctuation, String, Text, Whitespace
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__all__ = ['PrqlLexer']
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class PrqlLexer(RegexLexer):
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"""
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For PRQL source code.
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grammar: https://github.com/PRQL/prql/tree/main/grammars
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"""
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name = 'PRQL'
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url = 'https://prql-lang.org/'
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aliases = ['prql']
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filenames = ['*.prql']
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mimetypes = ['application/prql', 'application/x-prql']
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version_added = '2.17'
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builtinTypes = words((
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"bool",
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"int",
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"int8", "int16", "int32", "int64", "int128",
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"float",
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"text",
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"set"), suffix=r'\b')
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def innerstring_rules(ttype):
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return [
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# the new style '{}'.format(...) string formatting
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(r'\{'
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r'((\w+)((\.\w+)|(\[[^\]]+\]))*)?' # field name
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r'(\:(.?[<>=\^])?[-+ ]?#?0?(\d+)?,?(\.\d+)?[E-GXb-gnosx%]?)?'
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r'\}', String.Interpol),
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(r'[^\\\'"%{\n]+', ttype),
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(r'[\'"\\]', ttype),
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(r'%|(\{{1,2})', ttype)
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]
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def fstring_rules(ttype):
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return [
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(r'\}', String.Interpol),
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(r'\{', String.Interpol, 'expr-inside-fstring'),
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(r'[^\\\'"{}\n]+', ttype),
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(r'[\'"\\]', ttype),
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]
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tokens = {
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'root': [
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# Comments
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(r'#!.*', String.Doc),
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(r'#.*', Comment.Single),
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# Whitespace
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(r'\s+', Whitespace),
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# Modules
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(r'^(\s*)(module)(\s*)',
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bygroups(Whitespace, Keyword.Namespace, Whitespace),
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'imports'),
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(builtinTypes, Keyword.Type),
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# Main
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(r'^prql ', Keyword.Reserved),
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('let', Keyword.Declaration),
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include('keywords'),
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include('expr'),
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# Transforms
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(r'^[A-Za-z_][a-zA-Z0-9_]*', Keyword),
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],
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'expr': [
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# non-raw f-strings
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('(f)(""")', bygroups(String.Affix, String.Double),
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combined('fstringescape', 'tdqf')),
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("(f)(''')", bygroups(String.Affix, String.Single),
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combined('fstringescape', 'tsqf')),
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('(f)(")', bygroups(String.Affix, String.Double),
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combined('fstringescape', 'dqf')),
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("(f)(')", bygroups(String.Affix, String.Single),
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combined('fstringescape', 'sqf')),
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# non-raw s-strings
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('(s)(""")', bygroups(String.Affix, String.Double),
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combined('stringescape', 'tdqf')),
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("(s)(''')", bygroups(String.Affix, String.Single),
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combined('stringescape', 'tsqf')),
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('(s)(")', bygroups(String.Affix, String.Double),
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combined('stringescape', 'dqf')),
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("(s)(')", bygroups(String.Affix, String.Single),
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combined('stringescape', 'sqf')),
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# raw strings
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('(?i)(r)(""")',
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bygroups(String.Affix, String.Double), 'tdqs'),
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("(?i)(r)(''')",
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bygroups(String.Affix, String.Single), 'tsqs'),
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('(?i)(r)(")',
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bygroups(String.Affix, String.Double), 'dqs'),
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("(?i)(r)(')",
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bygroups(String.Affix, String.Single), 'sqs'),
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# non-raw strings
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('"""', String.Double, combined('stringescape', 'tdqs')),
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("'''", String.Single, combined('stringescape', 'tsqs')),
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('"', String.Double, combined('stringescape', 'dqs')),
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("'", String.Single, combined('stringescape', 'sqs')),
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# Time and dates
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(r'@\d{4}-\d{2}-\d{2}T\d{2}(:\d{2})?(:\d{2})?(\.\d{1,6})?(Z|[+-]\d{1,2}(:\d{1,2})?)?', Literal.Date),
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(r'@\d{4}-\d{2}-\d{2}', Literal.Date),
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(r'@\d{2}(:\d{2})?(:\d{2})?(\.\d{1,6})?(Z|[+-]\d{1,2}(:\d{1,2})?)?', Literal.Date),
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(r'[^\S\n]+', Text),
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include('numbers'),
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(r'->|=>|==|!=|>=|<=|~=|&&|\|\||\?\?|\/\/', Operator),
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(r'[-~+/*%=<>&^|.@]', Operator),
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(r'[]{}:(),;[]', Punctuation),
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include('functions'),
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# Variable Names
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(r'[A-Za-z_][a-zA-Z0-9_]*', Name.Variable),
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],
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'numbers': [
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(r'(\d(?:_?\d)*\.(?:\d(?:_?\d)*)?|(?:\d(?:_?\d)*)?\.\d(?:_?\d)*)'
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r'([eE][+-]?\d(?:_?\d)*)?', Number.Float),
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(r'\d(?:_?\d)*[eE][+-]?\d(?:_?\d)*j?', Number.Float),
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(r'0[oO](?:_?[0-7])+', Number.Oct),
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(r'0[bB](?:_?[01])+', Number.Bin),
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(r'0[xX](?:_?[a-fA-F0-9])+', Number.Hex),
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(r'\d(?:_?\d)*', Number.Integer),
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],
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'fstringescape': [
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include('stringescape'),
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],
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'bytesescape': [
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(r'\\([\\bfnrt"\']|\n|x[a-fA-F0-9]{2}|[0-7]{1,3})', String.Escape)
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],
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'stringescape': [
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(r'\\(N\{.*?\}|u\{[a-fA-F0-9]{1,6}\})', String.Escape),
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include('bytesescape')
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],
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'fstrings-single': fstring_rules(String.Single),
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'fstrings-double': fstring_rules(String.Double),
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'strings-single': innerstring_rules(String.Single),
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'strings-double': innerstring_rules(String.Double),
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'dqf': [
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(r'"', String.Double, '#pop'),
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(r'\\\\|\\"|\\\n', String.Escape), # included here for raw strings
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include('fstrings-double')
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],
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'sqf': [
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(r"'", String.Single, '#pop'),
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(r"\\\\|\\'|\\\n", String.Escape), # included here for raw strings
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include('fstrings-single')
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],
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'dqs': [
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(r'"', String.Double, '#pop'),
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(r'\\\\|\\"|\\\n', String.Escape), # included here for raw strings
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include('strings-double')
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],
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'sqs': [
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(r"'", String.Single, '#pop'),
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(r"\\\\|\\'|\\\n", String.Escape), # included here for raw strings
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include('strings-single')
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],
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'tdqf': [
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(r'"""', String.Double, '#pop'),
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include('fstrings-double'),
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(r'\n', String.Double)
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],
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'tsqf': [
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(r"'''", String.Single, '#pop'),
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include('fstrings-single'),
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(r'\n', String.Single)
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],
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'tdqs': [
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(r'"""', String.Double, '#pop'),
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include('strings-double'),
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(r'\n', String.Double)
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],
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'tsqs': [
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(r"'''", String.Single, '#pop'),
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include('strings-single'),
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(r'\n', String.Single)
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],
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'expr-inside-fstring': [
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(r'[{([]', Punctuation, 'expr-inside-fstring-inner'),
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# without format specifier
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(r'(=\s*)?' # debug (https://bugs.python.org/issue36817)
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r'\}', String.Interpol, '#pop'),
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# with format specifier
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# we'll catch the remaining '}' in the outer scope
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(r'(=\s*)?' # debug (https://bugs.python.org/issue36817)
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r':', String.Interpol, '#pop'),
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(r'\s+', Whitespace), # allow new lines
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include('expr'),
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],
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'expr-inside-fstring-inner': [
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(r'[{([]', Punctuation, 'expr-inside-fstring-inner'),
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(r'[])}]', Punctuation, '#pop'),
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(r'\s+', Whitespace), # allow new lines
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include('expr'),
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],
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'keywords': [
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(words((
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'into', 'case', 'type', 'module', 'internal',
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), suffix=r'\b'),
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Keyword),
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(words(('true', 'false', 'null'), suffix=r'\b'), Keyword.Constant),
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],
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'functions': [
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(words((
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"min", "max", "sum", "average", "stddev", "every", "any",
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"concat_array", "count", "lag", "lead", "first", "last",
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"rank", "rank_dense", "row_number", "round", "as", "in",
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"tuple_every", "tuple_map", "tuple_zip", "_eq", "_is_null",
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"from_text", "lower", "upper", "read_parquet", "read_csv"),
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suffix=r'\b'),
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Name.Function),
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],
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'comment': [
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(r'-(?!\})', Comment.Multiline),
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(r'\{-', Comment.Multiline, 'comment'),
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(r'[^-}]', Comment.Multiline),
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(r'-\}', Comment.Multiline, '#pop'),
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],
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'imports': [
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(r'\w+(\.\w+)*', Name.Class, '#pop'),
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],
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}
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