3.2 KiB
php2go
Convert PHP source code to Go by AST walking.
The goal is to produce idiomatic, maintainable Go code as part of a one-off conversion. This is not generally possible for highly dynamic PHP code, that may require manual fixups.
Progress
[X] Convert some small programs
[X] Error handling
- [X] All functions return (type, error)
- [X] Convert throw to err return
- [ ] Elide error return for functions that cannot throw
- ?? Could be a standalone Go refactoring tool
- [ ] Non-leaf function calls need to check + bubble errors
- [ ] Behaviour of function calls in rvalue cases where err cannot be checked
[ ] Comprehensive coverage of all AST node types
- [ ] Node
- [ ] Stmt
- [ ] Expr
- [X] Binary
- [ ] Scalar
[X] Array handling
- [X] Infer whether to use slice/map for PHP array
- [ ] Infer whether map use should be order-preserving
[ ] Multi-file programs
- [ ] Include/Require
[ ] Namespaces
[ ] Generators
[ ] Numbered break/continue
[ ] Goto
[ ] Comma operator
[ ] isset/unset
[ ] instanceof
[ ] try/catch/finally
[ ] Abandon upon sight of eval / extract / ...
[ ] Assignment expressions
- Go doesn't support assignment in rvalues, only as a statement
- When walking below stmt level, need to first fully walk and check for any function calls + assignments that may need hoisting (and we can probably only do that correctly if there is no short-circuiting)
- [X] Add subtree walk + catch error for this case
- [ ] Add hoisting pass
[ ] Closures
- [ ] Handle value/reference captures
[ ] Sort callbacks
- [ ] Transparent conversion to sort.Slice
[X] Convert top-level calls to init()/main()
- Currently always init
[ ] Class/object transformations
- [X] Convert new X constructor calls to NewX
- [X] Visibility
- [ ] Call mangled function name at call sites
- PHP variable names are case-sensitive, function names are case-insensitive
- [X] Static methods
- [X] Inheritance partial
- [ ] Interfaces
- [X] super
- [X] Need to track current conversion state through into function generator, to select the concrete parent
- [X] parent::
- [X] self::
- [ ] static::
- [ ] Traits / use
- [ ] Abstract methods
[ ] Type inference
- [ ] Convert known PHP typenames to Go equivalents
- [ ] Parse extra types from phpdoc blocks
[ ] Infer whether to declare variable (var / :=) or reuse (=)
- [ ] Track current visibility scope
[ ] Library/environment transformations
- [ ] Standard library transformations
- [ ] Track golang package imports
- [ ] Handle conflicts between golang stdlib packages / local variable names
- [ ] PHP Superglobal transformations
- [ ] $_SERVER['argv'] to os.Args
- [ ] $_GET['name'] to r.FormValue('name')
- [ ] Common 3rd party package transformations to popular equivalents (optional)
- [ ] Guzzle
- [ ] AWS SDK
- [ ] PHPUnit -> Go Test
- [ ] Replace Composer/PSR-4 autoloading with Go imports
[X] Variadic function parameters
[X] Preserve comments
[ ] Preserve rough line spacing
[ ] Convert wordpress / mediawiki / symfony
- [ ] Option to convert with preset=cli, preset=web, webroot path
- [ ] Option to generate built-in web server
[ ] Generate source maps
[ ] Command-line tool option to go run