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feat: add IsNullOrUndefined #909

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januwA wants to merge 2 commits into from
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feat: add IsNullOrUndefined #909

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a331a7b
feat: add IsNullOrUndefined
januwA Feb 15, 2021
db71024
Rename IsNullOrUndefined to IsNullish
januwA Feb 16, 2021
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feat: add IsNullOrUndefined
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@januwA
januwA committed Feb 15, 2021
commit a331a7bf18e87a9673b2412003be694d106c14d3
4 changes: 4 additions & 0 deletions napi-inl.h
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Expand Up @@ -539,6 +539,10 @@ inline bool Value::IsNull() const {
return Type() == napi_null;
}

inline bool Value::IsNullOrUndefined() const {
return Type() == napi_undefined || Type() == napi_null;
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@KevinEady KevinEady Feb 24, 2021 •
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The compiler may optimize this since it is const, but let's store the Type() call in a variable or use a switch statement to ensure it isn't called twice.

}

inline bool Value::IsBoolean() const {
return Type() == napi_boolean;
}
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3 changes: 2 additions & 1 deletion napi.h
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Expand Up @@ -269,8 +269,9 @@ namespace Napi {

napi_valuetype Type() const; ///< Gets the type of the value.

bool IsUndefined() const; ///< Tests if a value is an undefined JavaScript value.
bool IsNull() const; ///< Tests if a value is a null JavaScript value.
bool IsUndefined() const; ///< Tests if a value is an undefined JavaScript value.
bool IsNullOrUndefined() const; ///< Tests if a value is a null or undefined JavaScript value.
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@KevinEady KevinEady Feb 15, 2021

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Maybe IsNullish would be more concise. With the definition of ?? from MDN as (emphasis mine)

The nullish coalescing operator (??) is a logical operator that returns its right-hand side operand when its left-hand side operand is null or undefined, and otherwise returns its left-hand side operand.

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@januwA januwA Feb 16, 2021

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New changes have been submitted

bool IsBoolean() const; ///< Tests if a value is a JavaScript boolean.
bool IsNumber() const; ///< Tests if a value is a JavaScript number.
#if NAPI_VERSION > 5
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