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This is a test page for my Regular Expression Engine (GitHub).
The rows correspond to the states of a DFA. The columns that are labeled with character ranges, correspond to outgoing edges. The row with a teal id-cell is the ‘current state’. This is the start state of the DFA.
The dimmed cells refer to state 0, which corresponds to the ⊥-expression. It does not match any string at all. The state with id 1 corresponds to the ⊤-expression. It matches all strings. The state with id 2 corresponds to the ε-expression, It matches only the empty string, and state-3 matches any string of length 1.