Method assertOk

src/thread.ts:375–411

(result: LuaReturn)

    }

    public assertOk(result: LuaReturn): void {
        if (result !== LuaReturn.Ok && result !== LuaReturn.Yield) {
            const resultString = LuaReturn[result]
            // This is the default message if there's nothing on the stack.
            const error = new Error(`Lua Error(${resultString}/${result})`)
            if (this.getTop() > 0) {
                if (result === LuaReturn.ErrorMem) {
                    // If there's no memory just do a normal to string.
                    error.message = this.lua.lua_tolstring(this.address, -1, null)
                } else {
                    const luaError = this.getValue(-1)
                    if (luaError instanceof Error) {
                        error.stack = luaError.stack
                    }

                    // Calls __tostring if it exists and pushes onto the stack.
                    error.message = this.indexToString(-1)
                }
            }

            // Also attempt to get a traceback
            if (result !== LuaReturn.ErrorMem) {
                try {
                    this.lua.luaL_traceback(this.address, this.address, null, 1)
                    const traceback = this.lua.lua_tolstring(this.address, -1, null)
                    if (traceback.trim() !== 'stack traceback:') {
                        error.message = `${error.message}\n${traceback}`
                    }
                    this.pop(1) // pop stack trace.
                } catch (err) {
                    console.warn('Failed to generate stack trace', err)
                }
            }

            throw error
        }
    }

    private getValueDecorations(value: any): Decoration {
        return value instanceof Decoration ? value : new Decoration(value, {})