asciigoat's core library
https://asciigoat.org/core
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31 lines
498 B
31 lines
498 B
// Package lexer provides basic helpers to implement parsers |
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package lexer |
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import ( |
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"errors" |
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"io" |
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) |
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// StateFn is a State Function of the parser |
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type StateFn func() (StateFn, error) |
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// Run runs a state machine until the state function either |
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// returns nil or an error |
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func Run(fn StateFn) error { |
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for fn != nil { |
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var err error |
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fn, err = fn() |
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switch { |
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case errors.Is(err, io.EOF): |
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// EOF |
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return nil |
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case err != nil: |
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// failed |
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return err |
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} |
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} |
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// ended |
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return nil |
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}
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