DoerParser class | doer.t[859]

A DoerParser is a helper object we use during initialization for parsing Doer 'cmd' strings and turning them into action description lists. The language-specific library creates these for us based on the language grammar.

These objects are only used during initialization, since they're only needed to set up the internal representation of a Doer command template string. During normal play we only need that internal representation.

`class DoerParser : object`

Superclass Tree (in declaration order)

`DoerParser`
`object`

Subclass Tree

(none)

Global Objects

(none)

Summary of Properties

`action_ pat_ roles_ verb_`

Summary of Methods

`construct`

Properties

`action_` | `doer.t[874]`

The Action object for the verb.

`pat_` | `doer.t[894]`

The regular expression for the verb rule. The verb initializer sets this up to contain the literal text of the verb rule's literal tokens, and to substitute a parenthesized group wildcard pattern for each noun slot. For example, for English, a Give To rule might look like 'give (.+) to (.+)'.

`roles_` | `doer.t[903]`

The list of object roles. This is a list of NounRole objects. The list entries correspond positionally to the parenthesized groups in the regular expression string, so roles_[1] is the noun role for the first parenthesized group, roles_[2] is the noun role for the second group, and so on.

`verb_` | `doer.t[885]`

The main verb word. This is simply the first word of the verb's token list. This is essentially a hash, to reduce the number of regular expressions we have to test individually. This saves us a lot of compute time, since it's very quick to pull out the first word and get a list of the small set of rules with the same first word. We then test each of those potential matches by doing the full regular expression comparison.

Methods

`construct (action, v, pat, roles)` | `doer.t[865]`

Construction. The language library should create one of these objects for each verb phrasing it wants to define for use in writing Doer 'cmd' strings.

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