JSConstDoubleSpec

This article covers features introduced in SpiderMonkey 17

Describes a double and integer value and assigns it a name.

Syntax

template<typename T>
struct JSConstScalarSpec {
    const char *name;
    T val;
/*
    uint8_t         flags;    // Obsolete from JSAPI 35
    uint8_t         spare[3]; // Obsolete from JSAPI 35
*/
};

typedef JSConstScalarSpec<double> JSConstDoubleSpec;
typedef JSConstScalarSpec<int32_t> JSConstIntegerSpec; // Added in SpiderMonkey 38

Name	Type	Description
`val`	`double` or `int32_t`	Value for the double or integer.
`name`	`const char *`	Name to assign the double.
`flags`	`uint8_t`	Property attributes for the double. Obsolete since JSAPI 35 Currently these can be 0 or more of the following values `OR`'d: `JSPROP_ENUMERATE`: property is visible in `for` loops. `JSPROP_READONLY`: property is read-only. `JSPROP_PERMANENT`: property cannot be deleted. `JSPROP_EXPORTED`: property can be exported outside its object. `JSPROP_INDEX`: property is actually an array element. If this field is `0`, `JS_DefineConstDoubles` uses the default attributes `JSPROP_READONLY \| JSPROP_PERMANENT` instead.
`spare`	`uint8_t [3]`	Reserved for future use. Obsolete since JSAPI 35

Description

JSConstDoubleSpecs is used to define a set of double values that are assigned as properties to an object using JS_DefineConstDoubles.

JSConstIntegerSpecs is used to define a set of double values that are assigned as properties to an object using JS_DefineConstIntegers.