mixinafPegger::RuleCtx

afPegger::RuleCtx

@Js

(Advanced) Handed to Rule classes during the matching process.

currentPos

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abstract Int currentPos()

Returns the current position in the underlying input stream.

eos

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abstract Bool eos()

Returns true if at the End-Of-Stream.

log

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abstract Void log(Str msg)

Logs the given message to debug. It is formatted to be the same as the other Pegger debug messages.

parseErr

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abstract PegParseErr parseErr(Str errMsg)

Returns a PEG specific ParseErr to be thrown.

peekChar

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abstract Int? peekChar(Int offset := 0)

Peeks a character relative to the current position (Does not consume any characters). For example:

Returns null if out of bounds.

process

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abstract Bool process(Rule rule)

Call to process a sub-rule. Returns true if it matched successfully.

readChar

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abstract Int readChar()

Consumes 1 character from the underlying input stream.

rollbackToPos

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abstract Void rollbackToPos(Int pos)

Rolls back the underlying input stream to the given position.

sos

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abstract Bool sos()

Returns true if at the Start-Of-Stream.

str

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abstract Str str()

Returns the string we are matching against.