expression.automaton(algo="auto")

Generate an automaton from an expression.

The algo can be:

• "auto": currently equivalent to "expansion", eventually should mix "standard" for basic expressions (faster) and "expansion" otherwise (more general).
• "derivation": use derivation-based expression.derived_term, stripped.
• "derived_term": same as "expansion"
• "expansion": use expansion-based expression.derived_term, stripped.
• "standard": use expression.standard.
• "thompson": use expression.thompson.
• "zpc": use expression.zpc.
• "zpc_compact": use expression.zpc, "compact" version.

See also:

• expression.derived_term
• expression.standard
• expression.thompson
• expression.zpc

Examples

import vcsn
e = vcsn.Z.expression('\e+<2>a+<3>b')
e

:0: FutureWarning: IPython widgets are experimental and may change in the future.

$\varepsilon + \left\langle 2 \right\rangle \,a + \left\langle 3 \right\rangle \,b$

e.automaton('derived_term')

e.automaton('standard')

e.automaton('thompson')

e.automaton('zpc')

e.automaton('zpc_compact')