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Anna Bulenkova
October 19, 2013
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devfest
Anna Bulenkova
October 19, 2013
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Transcript
Hi
Anna Bulenkova Software Developer JetBrains @povergo
RubyMine project
Surviving Environment Disasters Or how we’re suffering making Ruby support
Ruby & Java
IntelliJ platform
Ruby 1995 vs RubyMine 2009
How to make an IDE?
In fact, forget the editor... •Debugging •VCS •Visualisation •SDK &
Libraries management •Frameworks •Something cute and sweet
We still need an editor •Find errors •Autocompletion •Resolve •Find
usages •Rename
Good editor
Roots of evil?
Open Source
Dynamic typing
Errors •Syntax •Everything else
Errors •Syntax - lexer & parser •Lexer - JFlex •Parser
- yourself or GrammarKit •Everything else - need to know what it is
Syntax tree AST + PSI
Syntax tree
Errors •Syntax - lexer & parser •Everything else - need
to know what it is
42
42
Indexing: file- & stub- based •External libraries •Internal content
References •Regular •Multi-resolve
It’s easy. Sometimes
Where to go?
FQN? Haven’t heard of it.
It’s more or less fine if we know the class
Even this is ok
Reassignments
Join types
class_eval
Class eval
Class eval
Class eval
instance_eval
Instance eval
Instance eval
Instance eval: go to declaration
method_missing and friends
Not even an option
Have we met before?
But how?
undef_method and friends
DSLs They are full of evil
DSLs They are full of eval
DSLs They are full of evil
We hardcode
With our own DSL
Hiding-places •Docs •Annotations •Naming conventions •Runtime
Runtime
SLOW
Choose the lesser of two evals
Choose the lesser of two evils
With or without IDE?
@povergo
[email protected]
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