(call)

function calls

(call receiver? args?)

Where:

1. receiver: the function being called (the func in func()) *
2. args: arguments supplied to the call *

Matching:

1. regular calls, e.g. func()
2. method calls, e.g. obj.method()
3. calls with generator expressions, e.g. func(x for x in items)

Behavior

• When a call uses a generator expression as its sole argument, you can match it with (gen ...) in the args slot.

Examples

Find print calls that emit string messages.

(call (id "print") (arg 1 (str)))

Selects in lines { 1 } but not in { 2, 3 }:

print("hello")
print(123)
log("hello")

---

Locate sum calls that iterate over prices with a generator expression.

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

Selects in lines { 1 } but not in { 2, 3 }:

total = sum(price for price in prices)
total = sum(cost for cost in costs)
total = sum([price for price in prices])

---

Find open calls that pass a binary mode.

(call (id "open") (arg 2 (str /b/)))

Selects in lines { 1, 3 } but not in { 2 }:

open(path, "rb")
open(path, "r")
open(path, "wb")

---

Arguments

receiver

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

args

• (arg)
• (gen)
• (:into) • (:and) • (:or) • (:not) • (:text) • (:kind) • (:replace) • (:capture)