errors and warnings / types / E2003

E2003 error

Unknown field or method (also: method defined outside its class body, assignment to the reserved __wowlua key)

area: types (x2xxx)
fails the build: yes
in plain Lua files: reported as W2003

The value has no field or method of that name. Classes are sealed, so every member of a class instance must be declared in the class body, in every mode; a misspelt name is the usual cause. Strict mode also reports a named field read from an array, an unknown field in a table literal written for a record type, and a name the string library doesn't have (s:nope()), all of which Lua would read as nil.

The code has two more meanings. A method defined outside its class body (function Animal:speak() … end after the class) is E2003: move it into the class. And the key __wowlua is reserved for the wowlua runtime, so assigning it on a frame or an instance is E2003 too.

Example

× failswowlua

class Animal    name: string = "Rex"endlocal a = Animal.new()print(a.nmae)

× failswowlua

class Animal    name: string = "Rex"endfunction Animal:speak()    print(self.name)end

✓ compileswowlua

class Animal    name: string = "Rex"    function speak()        print(self.name)    endendlocal a = Animal.new()print(a.name)a:speak()

The compiler reports it like this:

error[E2003]: `Animal` has no field or method `nmae`
  ┌─ src/main.wowlua:5:9
  │
5 │ print(a.nmae)
  │         ^^^^ here

code	message
W2003	Unknown field or method (also: method defined outside its class body, assignment to the reserved `__wowlua` key) (in a plain Lua file)
E2051	Unknown field added to a sealed table (strict mode)
E2011	Access to a `private` / `protected` member

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terminal

$ wowlua explain E2003
E2003 (error): Unknown field or method (also: method defined outside its class body, assignment to the reserved __wowlua key)

source on GitHub ↗

Example

Related codes

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