Vocabulary/ModifierTrains/DerivedHooks

Many examples of modifier tridents form modifier forks. These forks are documented on the modifier trains page. (And, many other examples of modifier tridents are invalid, for example (a:a:a:) throws an error.)

However, some modifier trains evaluate two items of the trident and (if the evaluation succeeds without error) can then form a hook with the result of that evaluation and the remaining parsed item. For example, (-1&) would become the adverb _1&

When a verb is evaluated, its result is always a noun (unless an error occurs).

Usually, when evaluated, adverbs and conjunctions create verb results. For example, +/ is a verb and +&1 is a verb. But not always. For example, (2 :'u%v') produces a conjunction.

NAA/VAA

N0 A1 or V0 A1 is evaluated and, depending on A1 the parse action then becomes

NA (evaluates) as (N01 A2) or

VA (evaluates) as (V01 A2) or

AA adverb which behaves like: {{(u A01) A2}} or

CA conjunction ...like: {{(u C01 v) A2}} or

ANA/AVA

N1 A2 or V1 A2 is evaluated and, depending on A2 the parse action then becomes

AN (invalid by itself) or

AV adverb ...like: {{(u A0) V12}} or

AA adverb ...like: {{(u A0) A12}} or

AC adverb ...like: {{(u A0) C12 u}} or

NNA

N1 A2 is evaluated and the parse action then becomes

NN (invalid) or

NV (invalid) or

NA (evaluates) as (N0 A12) or

NC adverb ...like: {{N0 C12 u}}

VNA/VVA

N1 A2 or V1 A2 is evaluated and the parse action then becomes

VN (evaluates) as (V0 N12) or

VV verb hook which behaves like: ({{y V01 V2 y}} : {{x V01 V2 y}}) or

VA (evaluates) as (V0 A12) or

VC adverb ...like: {{V0 C12 u}}

VNC

V0 N1 is evaluated and the parse action then becomes NC adverb ...like: {{N01 C2 u}}

NAC/VAC

N0 A1 or V0 A1 is evaluated and the parse action then becomes

NC adverb ...like: {{N01 C2 u}} or

VC adverb ...like: {{V01 C2 u}} or

AC adverb ...like: {{(u A01) C2 u}}

CC conjunction ...like: {{(u C01 v) (u C2 v)}}

NAN/VAN

N0 A1 or V0 A1 is evaluated and the parse action then becomes

NN (invalid) or

VN (evaluates) as (V01 N2) or

AN (invalid) or

CN adverb ...like: {{u C01 N2}}

NAV/VAV

N0 A1 or V0 A1 is evaluated and the parse action then becomes

NN (invalid) or

VV verb hook ...like: {{y V01 V2 y}} : {{x V01 V2 y}} or

AV adverb ...like: {{(u A01) V2}} or

CV adverb ...like: {{u C01 V2}}

Also, some important combinations of three adjacent items are evaluated in higher priority parsing actions, and are documented elsewhere:

NVN

Dyadic verb

NCN/NCV/VCN/VCV

Conjunction

VVV

Verb fork