The nodes are not implemented at all.

Tomas

-----Original Message-----
From: Oleg Tkachenko
Sent: Friday, August 15, 2008 9:46 AM
To: Tomas Matousek; IronRuby External Code Reviewers
Cc: [email protected]
Subject: RE: Code Review: RubyAST

Finalizer.cs and Initializer.cs still contain empty //TODO: comments. It's not 
obvious to me from the context what should be TODO.
Otherwise looks great.

--
Oleg


-----Original Message-----
From: Tomas Matousek
Sent: Friday, August 15, 2008 9:22 AM
To: IronRuby External Code Reviewers
Cc: [email protected]
Subject: Code Review: RubyAST

tfpt review "/shelveset:RubyAST;REDMOND\tomat"

Merges Statement with Expression in AST. Gets rid of ExpressionStatement to 
make ASTs smaller.
Any AST expression can be now emitted as statement (i.e. we don't need its 
value) by Transform method and any statement can be emitted as expression by 
TransformRead method.

Notes:
The grammar considers a construct a syntactic statement if the grammar doesn't 
allow it to be read in an assignment rhs or pass it as an argument to a method 
call.
For example,

a = return 1
foo(return 1)
foo(1 if false)

are not valid Ruby statements, therefore 'return <expr>' and '<stmt> if <expr>' 
are syntactic statements.

If a statement is used in begin ... end or (...) block as the last statement 
its value becomes the value of the block. This way a value of some statements 
can be retrieved (e.g. alias foo bar, undef x, <stmt> if <expr>, <stmt> while 
<expr>). Most of such statements have nil value, some of them however might 
evaluate to a non-nil value (e.g. <stmt> if <expr>).

Tomas


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