241 lines
3.7 KiB
JavaScript
241 lines
3.7 KiB
JavaScript
module.exports = grammar({
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name: 'dust',
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word: $ => $.identifier,
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rules: {
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root: $ => repeat1($.item),
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item: $ => prec.left(repeat1($.statement)),
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statement: $ => choice(
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$.comment,
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$.assignment,
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$.expression,
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$.if_else,
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$.insert,
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$.select,
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$.while,
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$.async,
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),
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comment: $ => seq(/[#]+.*/),
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expression: $ => choice(
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$._expression_kind,
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seq('(', $._expression_kind, ')'),
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),
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_expression_kind: $ => prec.right(choice(
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$.value,
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$.identifier,
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$.function_call,
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$.math,
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$.logic,
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)),
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identifier: $ => /[a-z|_|.]+[0-9]?/,
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value: $ => choice(
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$.integer,
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$.float,
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$.string,
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$.boolean,
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$.list,
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$.function,
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$.table,
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$.map,
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),
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integer: $ => /[-]?[0-9]+/,
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float: $ => /[-]?[0-9]+[.]{1}[0-9]*/,
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string: $ => /("[^"]*?")|('[^']*?')|(`[^`]*?`)/,
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boolean: $ => choice(
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'true',
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'false',
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),
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list: $ => seq(
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'[',
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repeat(seq($.expression, optional(','))),
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']'
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),
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function: $ => seq(
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'function',
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optional(seq('<', repeat(seq($.identifier, optional(','))), '>')),
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'{',
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$.item,
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'}',
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),
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table: $ => seq(
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'table',
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seq('<', repeat1(seq($.identifier, optional(','))), '>'),
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'{',
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repeat($.expression),
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'}',
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),
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map: $ => seq(
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'{',
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repeat(seq($.identifier, "=", $.expression)),
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'}',
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),
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math: $ => prec.left(seq(
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$.expression,
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$.math_operator,
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$.expression,
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)),
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math_operator: $ => choice(
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'+',
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'-',
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'*',
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'/',
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'%',
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),
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logic: $ => prec.right(seq(
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$.expression,
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$.logic_operator,
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$.expression,
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)),
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logic_operator: $ => choice(
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'==',
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'!=',
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'&&',
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'||',
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'>',
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'<',
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">=",
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"<=",
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),
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assignment: $ => prec.right(seq(
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$.identifier,
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$.assignment_operator,
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$.statement,
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)),
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assignment_operator: $ => choice(
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"=",
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"+=",
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"-=",
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),
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if_else: $ => prec.left(seq(
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$.if,
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repeat(seq($.else_if)),
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optional(seq($.else)),
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)),
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if: $ => seq(
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'if',
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$.expression,
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'{',
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$.statement,
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'}',
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),
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else_if: $ => seq(
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'else if',
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$.expression,
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'{',
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$.statement,
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'}',
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),
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else: $ => seq(
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'else',
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'{',
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$.statement,
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'}',
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),
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function_call: $ => prec.right(seq(
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'(',
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choice($.identifier, $.tool),
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repeat(seq($.expression, optional(','))),
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')',
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)),
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while: $ => seq(
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'while',
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$.expression,
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'{',
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$.item,
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'}',
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),
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for: $ => seq(
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'for',
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$.identifier,
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'in',
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$.expression,
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'{',
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$.item,
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'}',
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),
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tool: $ => choice(
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'assert',
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'assert_equal',
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'output',
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'read',
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'write',
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'raw',
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'sh',
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'bash',
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'fish',
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'zsh',
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'random',
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'random_boolean',
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'random_float',
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'random_string',
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'random_integer',
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'count',
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'sort',
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'transform',
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'filter',
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'to_csv',
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'from_csv',
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'to_json',
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'from_json',
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'help',
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),
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select: $ => prec.right(seq(
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'select',
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$.identifier,
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'from',
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$.identifier,
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optional(
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seq('where', $.expression)
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),
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)),
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insert: $ => prec.right(seq(
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'insert',
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repeat1($.list),
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'into',
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$.identifier,
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optional(
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seq('where', $.logic)
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),
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)),
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async: $ => seq('async', $.item),
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}
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}); |