IBEX

BROWSER LAB

Inspect an LR grammar.

Parse extended EBNF, compare construction algorithms, inspect conflicts and download the versioned automaton IR. Press Ctrl/⌘ + Enter to analyze.

grammar.y

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Analysis

ruby.wasm worker

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Construction choices

Analyze the same source with another algorithm to compare bounded observations. The algorithm is an invocation choice unless the grammar declares a canonical one.

AlgorithmRole
LALR(1)Compatible default
IELR(1)Preview conflict-preserving backend
LR(1)Canonical analysis
SLRFOLLOW-set reductions

Analysis runs locally in a dedicated worker. Grammar actions are parsed as text and are not executed. The worker is stopped if analysis exceeds 15 seconds.