80 lines
1.5 KiB
JavaScript
80 lines
1.5 KiB
JavaScript
module.exports = grammar({
|
|
name: "blueprint",
|
|
|
|
extras: ($) => [
|
|
/\s+/,
|
|
$.comment,
|
|
],
|
|
|
|
rules: {
|
|
source_file: ($) => repeat($._definition),
|
|
|
|
_definition: ($) => choice(
|
|
$.assignment,
|
|
),
|
|
|
|
comment: (_) => seq("#", /.*/),
|
|
|
|
// Definitions {{{
|
|
|
|
assignment: ($) => seq(
|
|
field("left", $.identifier),
|
|
field("operator", choice("=", "+=")),
|
|
field("right", $._expr),
|
|
),
|
|
|
|
// }}}
|
|
|
|
// Expressions {{{
|
|
|
|
_expr: ($) => choice(
|
|
// Literals
|
|
$.identifier,
|
|
$.integer_literal,
|
|
$._string_literal,
|
|
),
|
|
|
|
// The Blueprint scanner makes use of Go's lexer, so copy their rule
|
|
identifier: (_) => /[_\p{XID_Start}][_\p{XID_Continue}]*/,
|
|
|
|
integer_literal: (_) => seq(optional("-"), /[0-9]+/),
|
|
|
|
// The Blueprint scanner makes use of Go's lexer, so copy their rule
|
|
_string_literal: ($) => choice(
|
|
$.raw_string_literal,
|
|
$.interpreted_string_literal,
|
|
),
|
|
|
|
raw_string_literal: (_) => token(seq(
|
|
"`",
|
|
/[^`]+/,
|
|
"`",
|
|
)),
|
|
|
|
interpreted_string_literal: $ => seq(
|
|
'"',
|
|
repeat(choice(
|
|
// Allow all characters without special meaning, disallow newlines
|
|
/[^"\n\\]+/,
|
|
$.escape_sequence,
|
|
)),
|
|
token.immediate('"'),
|
|
),
|
|
|
|
escape_sequence: (_) => token.immediate(seq(
|
|
'\\',
|
|
choice(
|
|
/[^xuU]/,
|
|
/\d{2,3}/,
|
|
/x[0-9a-fA-F]{2,}/,
|
|
/u[0-9a-fA-F]{4}/,
|
|
/U[0-9a-fA-F]{8}/,
|
|
),
|
|
)),
|
|
|
|
// }}}
|
|
}
|
|
});
|
|
|
|
// vim: foldmethod=marker sw=2
|