75 lines
1.1 KiB
JavaScript
75 lines
1.1 KiB
JavaScript
module.exports = grammar({
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name: 'dust',
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rules: {
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source_file: $ => repeat(choice(
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$.comment,
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$.expression,
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$.yield,
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$.chain
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)),
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expression: $ => choice(
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prec(2, $.value),
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prec(1, $.identifier),
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$.tool,
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seq($.identifier, $.operator, $.expression),
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),
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value: $ => choice(
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$.integer,
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$.float,
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$.string,
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$.list,
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$.empty,
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$.boolean,
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),
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comment: $ => /(#)(.+?)([\n\r])/,
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yield: $ => "->",
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chain: $ => ";",
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identifier: $ => /[a-zA-Z|_|.]+(_[a-zA-Z]+)*/,
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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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tool: $ => choice(
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"random",
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"random_boolean",
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"random_integer",
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"random_string",
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"random_float"
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),
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float: $ => /\d+\.\d*/,
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integer: $ => /\d+/,
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string: $ => /"(.*?)\"/,
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function: $ => /'(.*?)\'/,
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empty: $ => "()",
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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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repeat1(seq($.expression, optional(','))),
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')'
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),
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}
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});
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