It does not need to hold an anonymous proc for constant search.
Also, this change can be expected to cause an anonymous proc to be GC'd.
This is useful for metaprogramming that makes heavy use of the `class`/`module`/`def` syntax in the `class_eval`/`eval` method.
Example:
- code
```ruby
p ObjectSpace.count_objects
String.class_eval do
def a
end
end
p ObjectSpace.count_objects
String.class_eval do
eval <<~CODE
def b
end
CODE
end
p ObjectSpace.count_objects
```
- result of building mruby-head (d63c0df6b) with `build_config/default.rb`
```
{:TOTAL=>1024, :FREE=>262, :T_PROC=>495, :T_ENV=>61, ...}
{:TOTAL=>1024, :FREE=>259, :T_PROC=>497, :T_ENV=>62, ...}
{:TOTAL=>1024, :FREE=>255, :T_PROC=>500, :T_ENV=>63, ...}
```
- result of building mruby with this patch and `build_config/default.rb`
```
{:TOTAL=>1024, :FREE=>264, :T_PROC=>494, :T_ENV=>60, ...}
{:TOTAL=>1024, :FREE=>262, :T_PROC=>495, :T_ENV=>61, ...}
{:TOTAL=>1024, :FREE=>261, :T_PROC=>496, :T_ENV=>61, ...}
```
Previously the following code did not produce the expected results:
```ruby
bx = binding
block = bx.eval("a = 1; proc { a }")
bx.eval("a = 2")
p block.call # Expect 2 but return 1 due to a bug
```
The previous implementation of `Binding#eval` evaluated the code and then merged the top layer variables.
This patch will parse and expand the variable space before making a call to `eval`.
This means that the call to `Binding#eval` will do the parsing twice.
In addition, the following changes will be made:
- Make `mrb_parser_foreach_top_variable()`, `mrb_binding_extract_proc()` and `mrb_binding_extract_env()` functions private global functions.
- Remove the `posthook` argument from `mrb_exec_irep()`.
The `posthook` argument was introduced to implement the `binding` method.
This patch is unnecessary because it uses a different implementation method.
ref #5362fixed#5491
If no new variable was defined in the `eval` method, the variable was hidden from the nested `eval` method.
```ruby
a = 1
p eval %(b = 2; eval %(a)) # => 1 (good)
p eval %(eval %(a)) # => undefined method 'a' (NoMethodError)
```
This issue has occurred since mruby 3.0.0.
- ` mrb_block_given_p()` -- The name comes from CRuby's `rb_block_given_p ()`
At the same time, it applies to `f_instance_eval()` and `f_class_eval()` of `mruby-eval`.
This reverts commit ee3017496b.
I misunderstood something and the new behavior was different from CRuby.
The issue was reported by @dearblue, regarding #5478
Running pre-commit with GitHub Actions now gives us more tests and coverage
Remove duplicate GitHub Actions for merge conflicts and trailing whitespace
Remove duplicate checks for markdownlint and yamllint from the GitHub Super-Linter
Add new custom pre-commit hook running with a shell script to sort alphabetically and uniquify codespell.txt
Add new pre-commit hook to check spelling with codespell
https://github.com/codespell-project/codespell
Fix spelling
`mrb_float_to_str()` used to take `fmt` argument. We thought no one used
the function, and OK to remove the argument. But at least `mruby-redis`
gem used the function.
dearblue