[#106355] [Ruby master Bug#18373] RBS build failure: '/include/x86_64-linux/ruby/config.h', needed by 'constants.o'. — "vo.x (Vit Ondruch)" <noreply@...>
Issue #18373 has been reported by vo.x (Vit Ondruch).
28 messages
2021/12/01
[ruby-core:106672] [Ruby master Feature#18231] `RubyVM.keep_script_lines`
From:
"ko1 (Koichi Sasada)" <noreply@...>
Date:
2021-12-14 16:58:50 UTC
List:
ruby-core #106672
Issue #18231 has been updated by ko1 (Koichi Sasada).
Status changed from Open to Closed
c7550537f11dcf6450a9d3df3af3fa1f4fe05b15
----------------------------------------
Feature #18231: `RubyVM.keep_script_lines`
https://bugs.ruby-lang.org/issues/18231#change-95345
* Author: ko1 (Koichi Sasada)
* Status: Closed
* Priority: Normal
* Assignee: ko1 (Koichi Sasada)
* Target version: 3.1
----------------------------------------
This ticket proposes the method `RubyVM.keep_script_lines` to manage the flag to keep the source code.
Now, `SCRIPT_LINES__ = {}` constant is defined, the hash will stores the compiled script with a path name (`{path => src}`). However, `eval` source code doesn't stores in it (maybe because it can be bigger and bigger).
## Proposal
This proposal to add script lines to the ISeq and AST.
```ruby
RubyVM::keep_script_lines = true
eval("def foo = nil\ndef bar = nil")
pp RubyVM::InstructionSequence.of(method(:foo)).script_lines
#=> ["def foo = nil\n", "def bar = nil"]
```
In this case, methods `foo` and `bar` are defined by `eval()` and ISeq of `foo` can returns script lines (all script for `eval`).
`ISeq#script_lines` returns compiled script lines.
When `ISeq` is GCed, then the source code will be also free'ed.
## Discussion
* This feature will be used by debugger (to show the source code) or REPL support (irb and so on) with `error_highlight`.
* Of course memory usage will be increased.
* We can introduce new status `only_eval` in future which will help REPL systems.
* We can implement `ISeq#source` method like `AST#source` method (similar to `toSource` in JavaScript), but this ticket doesn't contain it.
## Implementation
https://github.com/ruby/ruby/pull/4913
For the Ractor support script lines object should be immutable (not implemented yet).
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