51 lines
1.0 KiB
JavaScript
51 lines
1.0 KiB
JavaScript
module.exports = grammar({
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name: "d2",
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externals: ($) => [$._identifier],
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rules: {
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// TODO: add the actual grammar rules
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source_file: ($) => repeat($._definition),
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_definition: ($) => choice($.connection, $.shape),
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_end: ($) => choice(";", "\n"),
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connection: ($) =>
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seq(
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field("left", $.identifier),
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$.arrow,
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field("right", $.identifier),
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$._end
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),
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shape: ($) =>
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prec.left(
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seq(
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field("id", $.identifier),
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optional(seq(":", field("label", $.label))),
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$._end
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)
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),
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label: ($) => choice($.string, /[^\n{]+/),
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identifier: ($) => $._identifier,
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arrow: ($) =>
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choice(
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seq("--", repeat("-")),
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seq("<-", repeat("-")),
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seq("<-", repeat("-"), ">"),
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seq(repeat("-"), "->")
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),
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string: ($) =>
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choice(
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seq("'", repeat(token(/[^'\n]+/)), "'"),
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seq('"', repeat(token(/[^'\n]+/)), '"'),
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seq("`", repeat(token(/[^'\n]+/)), "`")
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),
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},
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});
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