括號偏好（IDE0047和IDE0048）

本文說明兩個相關規則，IDE0047 和 IDE0048。

概述

本節中的樣式規則涉及括號喜好設定，包括使用括弧來釐清算術、關係型和其他二進位 運算符的優先順序。

選項

此規則具有相關聯的選項，可根據運算子類型指定喜好設定：

• 算術二元運算符 - dotnet_style_parentheses_in_arithmetic_binary_operators
• 關係型二元運算符 - dotnet_style_parentheses_in_relational_binary_operators
• 其他二元運算子 - dotnet_style_parentheses_in_other_binary_operators
• 其他運算子 - dotnet_style_parentheses_in_other_operators

如需設定選項的相關資訊，請參閱 選項格式。

算術運算符號的括號樣式設定 (dotnet_style_parentheses_in_arithmetic_binary_operators)

算術二元運算符包括：*、/、%、+、-、<<、>>、&、^和 |。

// dotnet_style_parentheses_in_arithmetic_binary_operators = always_for_clarity
var v = a + (b * c);

// dotnet_style_parentheses_in_arithmetic_binary_operators = never_if_unnecessary
var v = a + b * c;

' dotnet_style_parentheses_in_arithmetic_binary_operators = always_for_clarity
Dim v = a + (b * c)

' dotnet_style_parentheses_in_arithmetic_binary_operators = never_if_unnecessary
Dim v = a + b * c

dotnet_樣式_關係_二元運算子的括號使用規範

關係型二元運算符包括：>、<、<=、>=、is、as、==和 !=。

// dotnet_style_parentheses_in_relational_binary_operators = always_for_clarity
var v = (a < b) == (c > d);

// dotnet_style_parentheses_in_relational_binary_operators = never_if_unnecessary
var v = a < b == c > d;

' dotnet_style_parentheses_in_relational_binary_operators = always_for_clarity
Dim v = (a < b) = (c > d)

' dotnet_style_parentheses_in_relational_binary_operators = never_if_unnecessary
Dim v = a < b = c > d

dotnet_style_其他二元運算符的括號

其他二元運算子為：&&、||和 ??。

// dotnet_style_parentheses_in_other_binary_operators = always_for_clarity
var v = a || (b && c);

// dotnet_style_parentheses_in_other_binary_operators = never_if_unnecessary
var v = a || b && c;

' dotnet_style_parentheses_in_other_binary_operators = always_for_clarity
Dim v = a OrElse (b AndAlso c)

' dotnet_style_parentheses_in_other_binary_operators = never_if_unnecessary
Dim v = a OrElse b AndAlso c

其他運算子中的 dotnet 風格括號

這個選項適用於下列 以外的運算子：

*、/、%、+、-、<<、>>、&、^、|>、<、<=、>=、is、as、==、!=&&、||、??

// dotnet_style_parentheses_in_other_operators = always_for_clarity
var v = (a.b).Length;

// dotnet_style_parentheses_in_other_operators = never_if_unnecessary
var v = a.b.Length;

' dotnet_style_parentheses_in_other_operators = always_for_clarity
Dim v = (a.b).Length

' dotnet_style_parentheses_in_other_operators = never_if_unnecessary
Dim v = a.b.Length

隱藏警告

如果您想要只隱藏單一違規，請將預處理器指示詞新增至原始程式檔以停用，然後重新啟用規則。

#pragma warning disable IDE0047 // Or IDE0048
// The code that's violating the rule is on this line.
#pragma warning restore IDE0047 // Or IDE0048

若要停用檔案、資料夾或項目的規則，請將其嚴重性設定為 組態檔中的 none。

[*.{cs,vb}]
dotnet_diagnostic.IDE0047.severity = none
dotnet_diagnostic.IDE0048.severity = none

若要停用所有程式碼樣式規則，請將類別 Style 的嚴重性設定為 組態檔中的 none。

[*.{cs,vb}]
dotnet_analyzer_diagnostic.category-Style.severity = none

如需詳細資訊，請參閱 如何在隱藏程式代碼分析警告。

另請參閱

• 程式代碼樣式語言規則
• 程式代碼樣式規則參考