errors and warnings / stdlib / E8340

E8340 error

Movable frame store field is not of type FramePosition?

area: stdlib (x8xxx)
fails the build: yes

frames.movable saves the frame's position in store[key], so that field must have the type FramePosition? (from wowlua:frames): optional, because it starts empty until the player first moves the frame. A field of another type, a required field, or a key the store doesn't have is reported. Declare the field as FramePosition?, usually in the defaults type of your saved.bind store.

Example

× failswowlua

import * as frames from "wowlua:frames" local db: { window: number? } = {}local window = CreateFrame("Frame", nil, UIParent)frames.movable(window, { store = db, key = "window" })

✓ compileswowlua

import * as frames from "wowlua:frames"import type FramePosition from "wowlua:frames" local db: { window: FramePosition? } = {}local window = CreateFrame("Frame", nil, UIParent)frames.movable(window, { store = db, key = "window" })

The compiler reports it like this:

error[E8340]: the store's `window` is `number?`; a movable frame keeps its position in a `FramePosition?` field
  ┌─ src/main.wowlua:5:44
  │
5 │ frames.movable(window, { store = db, key = "window" })
  │                                            ^^^^^^^^ here

Offline

terminal

$ wowlua explain E8340
E8340 (error): Movable frame store field is not of type FramePosition?

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