26 lines
691 B
JavaScript
26 lines
691 B
JavaScript
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// Ref: https://yaml.org/spec/1.2/spec.html#schema/core/
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module.exports = grammar({
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name: "schema",
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extras: $ => [],
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rules: {
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pln: $ => choice($.nul, $.bol, $.int, $.flt),
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nul: $ => /~|null|Null|NULL/,
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bol: $ => /true|True|TRUE|false|False|FALSE/,
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int: $ => or([
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/[-+]?[0-9]+/, // base 10
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/0o[0-7]+/, // base 8
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/0x[0-9a-fA-F]+/, // base 16
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]),
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flt: $ => or([
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/[-+]?(\.[0-9]+|[0-9]+(\.[0-9]*)?)([eE][-+]?[0-9]+)?/, // number
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/[-+]?(\.inf|\.Inf|\.INF)/, // infinity
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/(\.nan|\.NaN|\.NAN)/, // not a number
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]),
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},
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});
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function or(regexList) {
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return new RegExp(regexList.map(regex => `(${regex.source})`).join('|'));
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}
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