42 lines
745 B
JavaScript
42 lines
745 B
JavaScript
module.exports = grammar({
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name: "tiger",
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rules: {
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source_file: ($) => choice(
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$._expr,
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),
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_expr: ($) => choice(
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"nil",
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$.integer_literal,
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$.string_literal,
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),
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integer_literal: (_) => /[0-9]+/,
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string_literal: ($) => seq(
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'"',
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repeat(choice($.escape_sequence, /[^"\\]+/)),
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'"',
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),
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escape_sequence: (_) => token.immediate(
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seq(
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"\\",
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choice(
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// Special escapes
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choice("a", "b", "f", "n", "r", "t", "v"),
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// Octal
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/[0-3][0-7]{2}/,
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// Hexadecimal
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seq("x", /[0-9a-fA-F]{2}/),
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// Escaped characters
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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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// vim: sw=2
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