Operating on JavaScript types

Operating on JavaScript types — Determining the type of a SeedValue

Functions

Includes

#include <seed/seed.h>

Description

Long description

Functions

seed_value_unprotect ()

void
seed_value_unprotect (SeedContext ctx,
                      SeedValue value);

Decrements the "protection count" of value , as explained in seed_value_protect().

Parameters

ctx

A SeedContext.

 

value

The SeedValue to unprotect.

 

seed_value_protect ()

void
seed_value_protect (SeedContext ctx,
                    SeedValue value);

Increments the "protection count" of value , in case you want to store a reference somewhere where the garbage collector won't be able to find it, and don't want it to be collected!

In order for value to be collected afterwards, it will need to be unprotected the same number of times with seed_value_unprotect().

Parameters

ctx

A SeedContext.

 

value

The SeedValue to protect.

 

seed_value_is_undefined ()

gboolean
seed_value_is_undefined (SeedContext ctx,
                         SeedValue value);

Determine whether or not value represents the JavaScript undefined value

Parameters

ctx

A SeedContext.

 

value

A SeedValue.

 

Returns

A gboolean (true if value is 'undefined')


seed_value_is_null ()

gboolean
seed_value_is_null (SeedContext ctx,
                    SeedValue value);

Determine whether or not value represents the JavaScript null value

Parameters

ctx

A SeedContext.

 

value

A SeedValue.

 

Returns

A gboolean (true if value is 'null')


seed_value_is_function ()

gboolean
seed_value_is_function (SeedContext ctx,
                        SeedObject value);

Determine whether or not value is a JavaScript function (and, therefore, an object)

Parameters

ctx

A SeedContext.

 

value

A SeedValue.

 

Returns

A gboolean (true if value is a function)


seed_value_is_number ()

gboolean
seed_value_is_number (SeedContext ctx,
                      SeedValue value);

Determine whether or not value is a JavaScript number

Parameters

ctx

A SeedContext.

 

value

A SeedValue.

 

Returns

A gboolean (true if value is a number)


seed_value_is_string ()

gboolean
seed_value_is_string (SeedContext ctx,
                      SeedValue value);

Determine whether or not value is a JavaScript string

Parameters

ctx

A SeedContext.

 

value

A SeedValue.

 

Returns

A gboolean (true if value is a string)


seed_value_is_object_of_class ()

gboolean
seed_value_is_object_of_class (SeedContext ctx,
                               SeedValue value,
                               SeedClass klass);

Determine whether or not value is an object of the specified class

Parameters

ctx

A SeedContext.

 

value

A SeedValue.

 

klass

A SeedClass.

 

Returns

A gboolean (true if value is of class klass )


seed_value_is_object ()

gboolean
seed_value_is_object (SeedContext ctx,
                      SeedValue value);

Determine whether or not value is a JavaScript object

Parameters

ctx

A SeedContext.

 

value

A SeedValue.

 

Returns

A gboolean (true if value is an object)


seed_value_get_type ()

SeedType
seed_value_get_type (SeedContext ctx,
                     SeedValue value);

Parameters

ctx

A valid SeedContext

 

value

A SeedValue

 

Returns

The type of value

Types and Values