25 lines
618 B
Hare
25 lines
618 B
Hare
use io;
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use fmt;
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export type invalid = !(uint, uint);
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export type error = !(invalid | io::error);
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export type punctuation = enum uint {
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LEFT_PAREN, RIGHT_PAREN,
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LEFT_SQUARE_BRACKET, RIGHT_SQUARE_BRACKET,
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LEFT_CURLY_BRACKET, RIGHT_CURLY_BRACKET,
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BACKSLASH, COLON,
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};
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export type word = struct { v: str };
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export type token = (punctuation | word | str);
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export fn strerror(err: error) const str = {
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static let buf: [64]u8 = [0...];
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match (err) {
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case let err: invalid =>
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return fmt::bsprintf(buf,
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"{}:{}: Invalid token found", err.0, err.1);
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case let err: io::error =>
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return io::strerror(err);
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};
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};
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