mirror of https://github.com/minio/minio.git
20 lines
1.0 KiB
Go
20 lines
1.0 KiB
Go
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// Package lexer defines interfaces and implementations used by Participle to perform lexing.
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//
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// The primary interfaces are Definition and Lexer. There are three implementations of these
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// interfaces:
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//
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// TextScannerLexer is based on text/scanner. This is the fastest, but least flexible, in that
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// tokens are restricted to those supported by that package. It can scan about 5M tokens/second on a
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// late 2013 15" MacBook Pro.
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//
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// The second lexer is constructed via the Regexp() function, mapping regexp capture groups
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// to tokens. The complete input source is read into memory, so it is unsuitable for large inputs.
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//
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// The final lexer provided accepts a lexical grammar in EBNF. Each capitalised production is a
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// lexical token supported by the resulting Lexer. This is very flexible, but a bit slower, scanning
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// around 730K tokens/second on the same machine, though it is currently completely unoptimised.
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// This could/should be converted to a table-based lexer.
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//
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// Lexer implementations must use Panic/Panicf to report errors.
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package lexer
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