errors and warnings / stdlib / E8118

E8118 error

wowlua:log level function used as a value (cannot be stripped)

area: stdlib (x8xxx)
fails the build: yes

A wowlua:log level function (trace, debug, info, warn, error) is used as a value instead of being called, whether imported by name or read from the log object or a namespace import (local f = log.warn, Log.debug). The compiler removes log calls below the profile's log-level, with their arguments, so they cost nothing in a release build. It can do that only for direct calls, never for a function that was stored in a variable or passed along. Wrap the call in your own function.

Example

× failswowlua

import warn from "wowlua:log" local report = warnreport("low on bag space")

✓ compileswowlua

import warn from "wowlua:log" local function report(message: string)    warn(message)endreport("low on bag space")

The compiler reports it like this:

error[E8118]: a log level function can only be called directly, so that the compiler can remove it; wrap it in a function
  ┌─ src/main.wowlua:3:16
  │
3 │ local report = warn
  │                ^^^^ here

code	message
E3045	Statement-only `wowlua:debug` helper used as a value

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terminal

$ wowlua explain E8118
E8118 (error): wowlua:log level function used as a value (cannot be stripped)

source on GitHub ↗

Example

Related codes

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