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buffered

io.buffered

unit type to group buffered io

Constructors

§
(LM 
type
, rp io.this.Read_Provider, buf_size i32)
:
tryable
 is
buffered.reader effect allows buffered reading
by using the given Read_Provider

note: anything in the buffer when effect is uninstalled will be discarded.
§
(LM 
type
, wp io.this.Write_Provider, buf_size i32)
:
effect
 is
buffered.writer effect allows buffered writing
by using the given Write_Provider

note: anything in the buffer when effect is uninstalled will be discarded.

Functions

§
 => 
String  
[Inherited from  Any]
create a String from this instance. Unless redefined, `a.as_string` will
create `"instance[T]"` where `T` is the dynamic type of `a`
§
 => 
Type  
[Inherited from  Any]
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.
§
 => 
String  
[Inherited from  Any]
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.
§
(LM 
type
, n i32)
 => 
Sequence u8
read n bytes using the currently installed byte reader effect
if the returned sequence is empty or count is less than n, end of file has been reached.
§
(LM 
type
, delim u8, strip_cr bool)
 => 
switch String io.end_of_file
use the currently installed byte reader effect
to read until the specified delimiter byte occurs
if specified, strips carriage return bytes before
the delimiter before returning the read data
§
(LM 
type
, delim String, strip_cr bool)
 => 
array String
Read input fully and split it at the given delimiter. If specified, delete
any trailing carriage returns (ASCII 13) from the resulting strings.
Read input fully into an array of bytes until end_of_file is reached
use the currently installed byte reader effect
to read until a line feed occurs.
returns the line
Read input line by line calling `f` for each line until `f` returns false
or end_of_file is reached.
Read input fully and split it at linefeed (ASCII 10) characters. Delete
any trailing carriage returns (ASCII 13) from the resulting strings.
§
(LM 
type
, n i32)
 => 
String
read string, up to n codepoints or until end of file
requires `buffered.reader` effect to be installed.
short hand for getting the currently installed `buffered.writer`

Type Functions

§
 => 
String  
[Inherited from  Type]
string representation of this type to be used for debugging.

result has the form "Type of '<name>'", but this might change in the future

redefines:

§
 => 
Type  
[Inherited from  Type]
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.

redefines:

§
(T 
type
)
 => 
bool  
[Inherited from  Type]
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

§
 => 
String  
[Inherited from  Type]
name of this type, including type parameters, e.g. 'option (list i32)'.
§
 => 
String  
[Inherited from  Type]
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.

NYI: Redefinition allows the type feature to be distinguished from its normal counterpart, see #3913

redefines:

§
 => 
Type  
[Inherited from  Any]
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`.