(gen)

generator expressions

(gen body?)

Where:

1. body: expression yielded by the generator (the x in (x for x in items)) *

Matching:

1. simple generators, e.g. (x for x in items)
2. filtered generators, e.g. (f(x) for x in items if x)

Behavior

• Does not match list comprehensions like [x for x in items].

Examples

Find generators that yield identifiers directly.

(gen (id x))

Selects in lines { 1 } but not in { 2 }:

(x for x in items)
(y for y in items)

---

Locate sum calls that use a generator expression.

(call (id "sum") (gen))

Selects in lines { 1 } but not in { 2 }:

total = sum(x for x in items)
total = sum([x for x in items])

---

Find generators that call len on each item.

(gen (call len))

Selects in lines { 1 } but not in { 2 }:

sum(len(x) for x in items)
sum(x for x in items)

---

Arguments

body

• (:kind) • (:ref) • (:text) • (call) • (fun) • (gen) • (id) • (num) • (str) • (:into) • (:and) • (:or) • (:not) • (:replace) • (:capture)