},
	ErrSTSNotInitialized: {
		Code:           "STSNotInitialized",
		Description:    "STS API not initialized, please try again.",
		HTTPStatusCode: http.StatusServiceUnavailable,
	},
	ErrSTSIAMNotInitialized: {
		Code:           "STSIAMNotInitialized",
		Description:    "STS IAM not initialized, please try again.",
		HTTPStatusCode: http.StatusServiceUnavailable,
	},
	ErrSTSUpstreamError: {

	MOVB.W 16(R16), R10        <=>      ldrsb x10, [x16,#16]!
	MOVBU.W 16(R16), R10       <=>      ldrb x10, [x16,#16]!

3. Go uses a series of MOV instructions as load and store.

64-bit variant ldr, str, stur => MOVD;
32-bit variant str, stur, ldrsw => MOVW;
32-bit variant ldr => MOVWU;
ldrb => MOVBU; ldrh => MOVHU;
ldrsb, sturb, strb => MOVB;
ldrsh, sturh, strh =>  MOVH.

4. Go moves conditions into opcode suffix, like BLT.

// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Package str provides string manipulation utilities.
package str

import (
	"fmt"
	"strings"
	"unicode"
	"unicode/utf8"
)

// StringList flattens its arguments into a single []string.
// Each argument in args must have type string or []string.

```Python hl_lines="9"
{!../../../docs_src/query_params_str_validations/tutorial001.py!}
```

쿼리 매개변수 `q`는 `Optional[str]` 자료형입니다. 즉, `str` 자료형이지만 `None` 역시 될 수 있음을 뜻하고, 실제로 기본값은 `None`이기 때문에 FastAPI는 이 매개변수가 필수가 아니라는 것을 압니다.

!!! note "참고"
    FastAPI는 `q`의 기본값이 `= None`이기 때문에 필수가 아님을 압니다.

    `Optional[str]`에 있는 `Optional`은 FastAPI가 사용하는게 아니지만, 편집기에게 더 나은 지원과 오류 탐지를 제공하게 해줍니다.

## 추가 검증

Dmitri Shuralyov <******@****.***> 1697571594 -0400

Dmitri Shuralyov <******@****.***> 1697571594 -0400

		}
		return false, nil
	}
	return len(name) == 0, nil
}

// scanChunk gets the next segment of pattern, which is a non-star string
// possibly preceded by a star.
func scanChunk(pattern string) (star bool, chunk, rest string) {
	for len(pattern) > 0 && pattern[0] == '*' {
		pattern = pattern[1:]
		star = true
	}
	inrange := false
	var i int
Scan:
	for i = 0; i < len(pattern); i++ {
		switch pattern[i] {
		case '\\':

		}
		return false, nil
	}
	return len(name) == 0, nil
}

// scanChunk gets the next segment of pattern, which is a non-star string
// possibly preceded by a star.
func scanChunk(pattern string) (star bool, chunk, rest string) {
	for len(pattern) > 0 && pattern[0] == '*' {
		pattern = pattern[1:]
		star = true
	}
	inrange := false
	var i int
Scan:
	for i = 0; i < len(pattern); i++ {
		switch pattern[i] {
		case '\\':

        class TestGrammar extends Parser;

        options {
            buildAST = true;
        }

        expr:   mexpr (PLUS^ mexpr)* SEMI!
            ;

        mexpr
            :   atom (STAR^ atom)*
            ;

        atom:   INT
            ;"""
        expect:
        "org.acme" == new MetadataExtracter().getPackageName(new StringReader(grammar))
    }

            options {
                buildAST = true;
            }

            expr:   mexpr (PLUS^ mexpr)* SEMI!
                ;

            mexpr
                :   atom (STAR^ atom)*
                ;

            atom:   INT
                ;"""

        file("grammar-builder/src/main/antlr/AnotherGrammar.g") << """
            header {
                package org.acme;