Language without a name

Here's a chance to talk about something emergent..  I like languages.  
For fun, I've been writing an interpreter for a new one.  It is sort of 
a prototype-based mix of Smalltalk and Python syntax.  I've had a 
fascination with prototype-based languages ever since I read Brian 
Foote's Prototype Pattern (maybe before) and typed in his Ego interpreter.

Right now, I have a tokenizer that is indentation aware and I'm building 
up recognizers for the phrase structure.  I'm doing it test-first and I 
don't have much of a sense of what the architecture of the interpreter 
will be, but it seems to be coming along fine.  If anyone wants to see 
the code, feel free to ask.  I don't plan on making it a very useful 
language.  The world is littered with those already ;)

I've been using the following example code as a guide while I work; it's 
code I expect the interpreter to accept.


false ifTrue: aBlock
  pass

false ifFalse: aBlock
  aBlock value

true ifTrue: aBlock
  aBlock value

true ifFalse: aBlock
  pass

test tests := list clone

test setUp
  pass

test tearDown
  pass

self runTest
  self should: false

test should: aBool
  aBool ifFalse:
      self hurl: "bad things"

test run: aResult
      self do:
          self setUp
          self runTest
          self tearDown
      ifUnable:
          e | aResult addMessage: e

divTest := test clone

divTest runTest: aResult
  self should: ((10 / 2) = 5)

testSuite add: test
  self tests add: test

testSuite run: aResult
  self tests do:
      aTest | aTest run: aResult

object slots
  self _

object clone
  result | self slots forEach:
      slot | result slots add: slot
  result



Michael Feathers

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