Adding Go's Defer to the TypeScript Compiler

3 hours ago

The author attempted to add Go's defer statement to the TypeScript compiler to enable delayed function execution for cleanup.
The implementation transforms AST with a stack of closures, capturing callee, receiver, and arguments immediately, and running them in reverse order on function exit.
Error handling uses AggregateError to combine multiple exceptions, unlike Go's value-based errors.
The author concludes that defer does not fit well in TypeScript due to differences in error handling (exceptions vs. values) and async complexity.
The ECMAScript Explicit Resource Management proposal (using/disposable) is suggested as a better alternative for resource cleanup.

The author implements a Reverse Polish Notation (RPN) calculator in Rust, explaining the stack-based evaluation process.
Initial code uses command line arguments, parse/match, and unwrap() for error handling, which is improved by direct iterator usage and skipping the program name.
Discussion of Rust's collect() method, type inference, and turbo fish notation is provided.

The article extends the toy optimizer with type-based alias analysis (TBAA) to improve load-store forwarding by distinguishing memory accesses based on object types.
A hierarchical heap representation is used, where each type (e.g., Array, String) is assigned a range of integers based on pre-order and post-order tree traversal, enabling quick overlap checks.
The alias check uses range overlap: if two objects' types have overlapping ranges, they may alias; otherwise, they do not. Defaulting to 'Any' when type info is absent.

The C compilation process goes from source to preprocessed source to assembly to object file to binary, with the assembly step being the hardest to reverse.
GDB is a debugger that steps through a compiled program line by line, showing changes after each step.
Using the -g flag with gcc preserves debug symbols, and -q with gdb suppresses the copyright information.

C Craft14 days ago

Size 0 arrays in GNU C serve as flexible arrays, with C99 supporting similar but disallowing explicit zero size declarations.
Size 1 arrays can mimic flexible arrays where size 0 is disallowed or enable uniform stack/heap interface with pointer-like syntax.
Using 'do...while(0)' in macros ensures safe inclusion in conditionals; GNU C's expression statements offer alternatives.

Go 1.27 introduces type parameters on methods, allowing generic operations on types to be defined as methods instead of package-level functions.
Struct literal keys can now use promoted fields from embedded structs directly, simplifying initialization syntax.
Function type inference is generalized to work in conversions, composite literals, and other contexts, reducing the need for explicit type arguments.

The author implements a Reverse Polish Notation (RPN) calculator in Rust, explaining the stack-based evaluation process.
Initial code uses command line arguments, parse/match, and unwrap() for error handling, which is improved by direct iterator usage and skipping the program name.
Discussion of Rust's collect() method, type inference, and turbo fish notation is provided.

The article extends the toy optimizer with type-based alias analysis (TBAA) to improve load-store forwarding by distinguishing memory accesses based on object types.
A hierarchical heap representation is used, where each type (e.g., Array, String) is assigned a range of integers based on pre-order and post-order tree traversal, enabling quick overlap checks.
The alias check uses range overlap: if two objects' types have overlapping ranges, they may alias; otherwise, they do not. Defaulting to 'Any' when type info is absent.

The C compilation process goes from source to preprocessed source to assembly to object file to binary, with the assembly step being the hardest to reverse.
GDB is a debugger that steps through a compiled program line by line, showing changes after each step.
Using the -g flag with gcc preserves debug symbols, and -q with gdb suppresses the copyright information.

C Craft14 days ago

Size 0 arrays in GNU C serve as flexible arrays, with C99 supporting similar but disallowing explicit zero size declarations.
Size 1 arrays can mimic flexible arrays where size 0 is disallowed or enable uniform stack/heap interface with pointer-like syntax.
Using 'do...while(0)' in macros ensures safe inclusion in conditionals; GNU C's expression statements offer alternatives.

Go 1.27 introduces type parameters on methods, allowing generic operations on types to be defined as methods instead of package-level functions.
Struct literal keys can now use promoted fields from embedded structs directly, simplifying initialization syntax.
Function type inference is generalized to work in conversions, composite literals, and other contexts, reducing the need for explicit type arguments.

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