(call) - Ruby

method calls

(call receiver? args?)

Where:

1. receiver: method name being called (the foo in foo()) *
2. args: arguments supplied to the call *

Matching:

1. regular calls, e.g. foo()
2. calls with receivers, e.g. obj.foo()
3. calls without parentheses, e.g. foo x

Behavior

• Receiver matching only supports identifier method names (operator methods like + are not supported).

Examples

Find shell-outs that pass string commands.

(call (id system) (arg 1 (str)))

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

system("ls -la")
system(cmd)
Kernel.system("whoami")

---

Locate puts calls that print debug strings.

(call (id puts) (arg 1 (str /^DEBUG:/)))

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

puts "DEBUG: start"
puts "INFO: start"
logger.info("DEBUG: start")

---

Find gsub calls that replace spaces with underscores.

(call (id gsub) (:and (arg 1 (str " ")) (arg 2 (str "_"))))

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

title.gsub(" ", "_")
title.gsub("-", "_")
name.sub(" ", "_")

---

Arguments

receiver

1. Identifier: shorthand for (id)
   
2. Pattern: shorthand for (id)
   
3. (:into)
4. (:nearest)
5. (:and)
6. (:or)
7. (:not)
8. (:text)
9. (:kind)
10. (:replace)
11. (:replace-in)
12. (:capture)
13. (:ref)
14. (call)
15. (id)
16. (num)
17. (proc)
18. (str)

args

1. (arg)
   
2. (:into)
3. (:nearest)
4. (:and)
5. (:or)
6. (:not)
7. (:text)
8. (:kind)
9. (:replace)
10. (:replace-in)
11. (:capture)