621 lines
10 KiB
Plaintext
621 lines
10 KiB
Plaintext
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/*
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* Multi-Process within a single threaded-process.
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* How to embed in a single threaded web server
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*
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*
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* stix_exec
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* VM(shceduler) ---> Context1(obj1,method1)
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* ---> Context2(obj2,method2)
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* ---> Context3(obj3,method3)
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*
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* all functions must be asynchronous
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* blocking functions will block scheduler.
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*/
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class Stix::Stix # Namespace name is indicated by ::
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{
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}
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class Stix::Array
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{
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+ makeSymbol: aString
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{
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| s |
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s := Symbol new: aString. # Symbol belongs to the Stix namespace.
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^s.
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}
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}
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A name space is stored in the namespace table of Stix.Namespaces.
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Stix.Symbols - symbols are global. not affected by namespaces.
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Stix.Sysdict -
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(#QSE => Namespace( Another Sysdict))
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(
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class Stix::Namespace
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{
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}
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class Stix::Class
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{
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}
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Stix.Namespaces is a system dictionary
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class QSE::Array
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{
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}
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class QSE::Tiara::Array
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{
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}
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Stix.Namespaces -> 'QSE'
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'QSE::Tiara'
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------------------------------------------------------------
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ARRAY CONSTANT TO ALLOW DYNAMIC VALUES.
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#( ...... ) array literal
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in original smalltalk, a block can't be placed inside the array literal
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arrayConstant := '#' array
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array := "(" { number | string | symbol | array | characterConstant }* ")".
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So #(1 2 [^20]) is illegal.
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if a block is there, treat it as a valid stix expression and evaluate it.
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#(1 2 [1 + 2] 5)
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t = Array new: 4.
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t at: 1 put: 1.
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t at: 2 put: 2.
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t at: 3 put: (1 + 2).
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t at: 4 put: 5.
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Evaluate the expressions in the array first
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Create an array
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Put the right element.
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-----------------------------------------------
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command line
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libstix.a
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stix stix.im Class1.st Class2.st Main.st Main
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--> load the image, compile Class1.st, compile Class2.st compile Main.st
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-->
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stix stix.im
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--> load the image
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-------------------------------------------------------------------------
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#!/usr/bin/stix
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###################################
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## Main.st
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###################################
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#include 'Class1.st'
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#include 'Class2.st'
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#class(#byte) Association(Magnitude)
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{
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declare a, b, c.
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declare(#class_instance) x.
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declare(#class) MAX_SIZE.
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function(#class) initialize
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{
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MAX_SIZE := 20.
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true whileTrue: [
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Stdout print: 10.
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].
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}
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function(#class) new: anInteger
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{
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Stix error: 'invalid message'.
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}
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}
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#main
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| a |
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a := Class1 new.
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Stdout format: #( 1 2 [a toInteger] ) with: '%.5d %.6d\n'.
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^0.
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-------------------------------------------------------------------------
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The statements after the #main directives are compiled as a class method of Stix.
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That is, 'Stix::main'. It becomes the entry point.
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-------------------------------------------------------------------------
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If no #main directive is found, there is no official entry point.
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However, if you have the initialize class method, it's invoked when a class
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is compiled, the statement in the class is executed before #main.
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if the statement creates a certain loop, it can act as a entry point as well.
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--------------------------------------------------------------------------
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Top level directive
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#main, #class, #include,
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#include is avaialble everywheren. It doesn't have to be in the top level.
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Do i need #import?
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---------------------------------------------------------------------------
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if there are multiple #main, do i need to concatenate all?
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or disallow only 1 #main??
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---------------------------------------------------------------------------
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#namespace directive?
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#namespace Stix::Compiler
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naming convention for multiple ?? . conflicts with the statement terminator.
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:: is ok a single : is used for various purpose but more than 1 is illegal in smalltalk.
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so use :: as a namespace separator.
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Relative naming and absoluate naming?
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Stix::Compiler <- is Stix the absolute top or a subname class under the current space?
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::Stix::Compiler <- i don't like this
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----------------------------------------------------------------------------
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"
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Stix
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Class
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NilObject
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Object
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NilObject
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Collection
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IndexedCollection
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FixedSizedCollection
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Array
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ByteArray
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String
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Symbol
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Set
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Dictionary
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SystemDictionary
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SymbolSet
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Magnitude
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Association
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Character
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Number
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Integer
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SmallInteger
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LargeInteger
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"
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class Stix
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{
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+ alloc
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{
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<primitive: 1>
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}
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+ new
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{
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^self alloc init.
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}
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- init
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{
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^self.
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}
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- finalize
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{
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}
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+ findClass: aString
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{
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| a b c |
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}
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}
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class Class extends Stix
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{
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}
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class NilObject extends Stix
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{
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}
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class Object extends Stix
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{
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}
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-----------------------------------------
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class variable
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and class instance variable
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-----------------------------------------
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A CV X Y
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CIV x y
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B CV Z
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civ z
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C civ q
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A: getX
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return x (return instance variable 1)
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B getX
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return A'X (return invance variable 3)
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x is index 1.
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y is index 2.
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z is index 3.
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X is index 3 of A.
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Y is index 3 of A.
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Z is index 2 of B.
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q is index 4 of C.
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A has x y X Y
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B has x y z Z
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C has x y z q
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place class intance variables before class variables.
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-------------------------------------------
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class Magnitude extends Stix
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{
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}
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%include 'Association.st'
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%class Association(Magnitude)
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{
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%category(Association class)
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%constant
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ABC := XXX
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BCD := KKK
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TTT := 20
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%self(private)
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%self(instance creation)
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| Key Value | "class variables" <--- index
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| xxx yyy | "class instance variables" <--- index
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key: aKey
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{
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^self key: aKey value: nil.
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}
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key: aKey value: aValue
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{
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| ass |
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ass := self new.
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ass key: aKey value: aValue.
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^ass.
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}
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%instance(initialization)
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| key value | "instance variables"
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key: aKey value: aValue
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{
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key := aKey.
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value := aValue.
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}
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key
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{
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^key
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}
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value
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{
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^value
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}
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value: value
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{
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self->value := aValue
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}
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= anAssociation
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{
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^self->key = anAssociation key.
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}
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hash
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{
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^self->key hash
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}
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}
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"Creates a new class Association inheriting nil"
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%class Association(nil)
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{
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%func more
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{
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^self
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}
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}
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"Extends an existing Association class"
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%class Association
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{
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}
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class Character extends Magnitude
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{
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}
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class Number extends Magnitude
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{
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}
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class Integer extends Number
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{
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}
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class SmallInteger extends Integer
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{
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}
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class LargeInteger extends Integer
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{
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}
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Association
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{
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%class
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| x y z |
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value: xxx
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{
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}
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}
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Association: Magnitude
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{
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}
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Association: <- for extending
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{
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}
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Association:
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{
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}
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Association key: xxx
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{
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}
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Association key: xxx
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{
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}
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----------------------------------------------------------------
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class ByteArray(FixedSizeCollection): #byte
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{
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fun at: anIndex put: aValue
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{
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^self basicAt: anIndex put: aValue.
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}
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}
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class(#byte) ByteArray(FixedSizedCollection)
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{
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}
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class(#byte) ByteArray(Stix)
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{
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}
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class Association(Magnitude) -> new Association inheriting Magnitude
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class Association() -> new Association inheriting Stix
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class(#byte) Association() -> new Association class inheriting Stix, but it's byte indexed.
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class(#word) Association() -> new Association class inheriting Stix, but it's word indexed.
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class(#oop) Association() -> new Association class inheriting Stix, but it's oop indexed. (it can have the variable part on top of the fixed part. response to the 'new: aSize' message)
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class(#word) Association(Magnitude) -> new Association class inheriting Magnitude, but it's word indexed.
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class Association -> revisit the Association class defined previsously. Revisiting can add new methods.
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#include 'Magnitude.st'
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#class(#byte) Association(Magnitude)
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{
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## class variables can be accessed by class methods and instance methods.
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## methods of subclasses can also access them.
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declare(#class) a b c.
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## class instance variable can be accessed inside the class method only.
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declare(#class_instance) d, e, f
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## All instance variables are protected by default.
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declare key, value.
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##
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## declare(#class) a, b, c. ## class variables
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## declare(#class_instance) a, b, c. ## class instance variables
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## declare(#instance) a, b, c. ## isntance variables
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## declare a,b, c. ## instance variables
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## function(#class) ## class method
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## function(#instance) ## instance method
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## function ## instance method
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## var and fun are not keywords. they can be a method name or a variable name.
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## Casing is not used to differentiate variable kinds like global local temporary etc.
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## other modifiers (EXPERIMENTAL. JUST THINKING).
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## declare(#class,#public,#rw) x. x can be accessed by other classes in read-write mode.
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## function(#private) xxx xxx is a private method
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## function(#class,#private) xxx xxx is private class method.
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function(#class) initialize
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{
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## This is the initilizer for the class object.
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## executed when this class is added to the system.
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## initialize the class variables and class instance variables.
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SIZE := 20.
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}
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function(#class) key: aKey
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{
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^self key: aKey value: nil.
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}
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function(#class) key: aKey value: aValue
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{
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| ass |
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ass := self new.
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ass key: aKey value: aValue.
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^ass.
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}
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function key: aKey value: aValue
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{
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key := aKey.
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value := aValue.
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}
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function key
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{
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^key
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}
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function value
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{
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^value
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}
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function value: value
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{
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self->value := aValue
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}
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function = anAssociation
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{
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^self->key = anAssociation key.
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}
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function hash
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{
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^self->key hash
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}
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function value: aBlock
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{
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|a |
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a := [ :t1 | t1 value ] with: 10.
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^a + 10.
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}
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}
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; message cascading
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. steatement terminator or flaoting point if in number and followed by a digit.
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^ return
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[ ] block
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# symbol or array
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() grouping
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$ character constant
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| temporary variable or end of block arguments.
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"" comment
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'' string
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: at the of the keyword or before block argument name.
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-------------------
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avaialbel
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' !
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--------------------------------------------------
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#! for comment
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## for comment
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-----------------------------
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@ binarySelector for coordianate number @ number.
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----------------------------------------------------------------------------
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Single line comment
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## comment text
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#! comment text (easy handling to skip hash bang)
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Multi-line comments - double quoted as in smalltalk
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" comment text "
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