☰
java
fuzion.java
fuzion.java -- unit type grouping low-level helpers for Java interface
Reference Constructors
A Java array
A Java reference
Java's 'java.lang.String' type
Functions
convert a Sequence to a Java Array object
This only works for types that map to java primitives
If you want to create an array of complex types use `Java.as_java_object [...]`
This only works for types that map to java primitives
If you want to create an array of complex types use `Java.as_java_object [...]`
create a String from this instance. Unless redefined, `a.as_string` will
create `"instance[T]"` where `T` is the dynamic type of `a`
create `"instance[T]"` where `T` is the dynamic type of `a`
intrinsic to convert a bool to a Java Boolean object
§(T type, class_name String, signature String, args array fuzion.this.java.this.Java_Object):Any => outcome fuzion.java.call_constructor.T
§(T
type
, class_name String, signature String, args array fuzion.this.java.this.Java_Object):
Any =>
outcome fuzion.java.call_constructor.TCall a Java constructor with given signature for class with given name
with given arguments
with given arguments
§(T type, class_name String, name String, signature String, args array fuzion.this.java.this.Java_Object):Any => outcome fuzion.java.call_static.T
§(T
type
, class_name String, name String, signature String, args array fuzion.this.java.this.Java_Object):
Any =>
outcome fuzion.java.call_static.TCall a static Java method with given name and signature with given
arguments
arguments
§(T type, class_name String, name String, signature String, thiz fuzion.this.java.this.Java_Object, args array fuzion.this.java.this.Java_Object):Any => outcome fuzion.java.call_virtual.T
§(T
type
, class_name String, name String, signature String, thiz fuzion.this.java.this.Java_Object, args array fuzion.this.java.this.Java_Object):
Any =>
outcome fuzion.java.call_virtual.TCall a virtual Java method class_name.name with given signature signature
on instance thiz with given arguments
on instance thiz with given arguments
Get the dynamic type of this instance. For value instances `x`, this is
equal to `type_of x`, but for `x` with a `ref` type `x.dynamic_type` gives
the actual runtime type, while `type_of x` results in the static
compile-time type.
There is no dynamic type of a type instance since this would result in an
endless hierarchy of types. So for Type values, dynamic_type is redefined
to just return Type.type.
equal to `type_of x`, but for `x` with a `ref` type `x.dynamic_type` gives
the actual runtime type, while `type_of x` results in the static
compile-time type.
There is no dynamic type of a type instance since this would result in an
endless hierarchy of types. So for Type values, dynamic_type is redefined
to just return Type.type.
intrinsic to convert an f32 to a Java Float object
intrinsic to convert a f64 to a Java Double object
read a field of given name from given object instance thiz. Wrap result into
an instance of T.
an instance of T.
read a static field of given name in class with given name. Wrap result into
an instance of T.
an instance of T.
intrinsic to convert an i16 to a Java Short object
intrinsic to convert an i32 to a Java Integer object
intrinsic to convert an i64 to a Java Long object
intrinsic to convert an i8 to a Java Byte object
convenience prefix operator to create a string from a value.
This permits usage of `$` as a prefix operator in a similar way both
inside and outside of constant strings: $x and "$x" will produce the
same string.
This permits usage of `$` as a prefix operator in a similar way both
inside and outside of constant strings: $x and "$x" will produce the
same string.
convert a string to a Java String object
intrinsic to convert an u16 to a Java Character object
Reference Types
A Java array
A Java reference
Java's 'java.lang.String' type
Type Features
string representation of this type to be used for debugging.
result has the form "Type of '<name>'", but this might change in the future
result has the form "Type of '<name>'", but this might change in the future
There is no dynamic type of a type instance since this would result in an
endless hierarchy of types, so dynamic_type is redefined to just return
Type.type here.
endless hierarchy of types, so dynamic_type is redefined to just return
Type.type here.
Is this type assignable to a type parameter with constraint `T`?
The result of this is a compile-time constant that can be used to specialize
code for a particular type.
is_of_integer_type(n T : numeric) => T : integer
say (is_of_integer_type 1234) # true
say (is_of_integer_type 3.14) # false
it is most useful in conjunction preconditions or `if` statements as in
pair(a,b T) is
=>
or
val(n T) is
The result of this is a compile-time constant that can be used to specialize
code for a particular type.
is_of_integer_type(n T : numeric) => T : integer
say (is_of_integer_type 1234) # true
say (is_of_integer_type 3.14) # false
it is most useful in conjunction preconditions or `if` statements as in
pair(a,b T) is
=>
or
val(n T) is
name of this type, including type parameters, e.g. 'option (list i32)'.
Get a type as a value.
This is a feature with the effect equivalent to Fuzion's `expr.type` call tail.
It is recommended to use `expr.type` and not `expr.type_value`.
`type_value` is here to show how this can be implemented and to illustrate the
difference to `dynamic_type`.
This is a feature with the effect equivalent to Fuzion's `expr.type` call tail.
It is recommended to use `expr.type` and not `expr.type_value`.
`type_value` is here to show how this can be implemented and to illustrate the
difference to `dynamic_type`.