Rivet version: main OS: Windows11

test.ri:3:13: error: expected name, found token `++` 
    |
  3 |     let v = ++x;
    |             ^
test.ri:3:15: error: expected `;`, found name `x` 
    |
  3 |     let v = ++x;
    |               ^
rivetc: error: could not compile package `core`, aborting due to 2 previous errors

It doesn't need to be fixed soon, the issue just track the problem Maybe we should solve these problems after self hosted as soon as possible

Rivet version: Main OS: Windows 11

fn main() {
    let x = 0;
    x++;python rivetc.py test.ri
    println("{}", x);
}

Infinite output：

test.ri:3:26: error: expected `;`, found keyword `test` 
    |
  3 |     x++;python rivetc.py test.ri
    |         

Output after forced exit：

Traceback (most recent call last):
  File "C:\Users\Austen\Desktop\rivet\rivetc.py", line 9, in <module>
    src.main(sys.argv[1:])
  File "C:\Users\Austen\Desktop\rivet\src\__init__.py", line 417, in main
    comp.build_package()
  File "C:\Users\Austen\Desktop\rivet\src\__init__.py", line 70, in build_package
    self.parse_files()
  File "C:\Users\Austen\Desktop\rivet\src\__init__.py", line 197, in parse_files
    self.source_files = parser.Parser(self).parse_pkg()
  File "C:\Users\Austen\Desktop\rivet\src\parser.py", line 32, in parse_pkg
    return self.parse_module_files()
  File "C:\Users\Austen\Desktop\rivet\src\parser.py", line 37, in parse_module_files
    source_files.append(self.parse_file(input))
  File "C:\Users\Austen\Desktop\rivet\src\parser.py", line 49, in parse_file
    return ast.SourceFile(file, self.parse_decls(), self.comp.mod_sym)
  File "C:\Users\Austen\Desktop\rivet\src\parser.py", line 107, in parse_decls
    decls.append(self.parse_decl())
  File "C:\Users\Austen\Desktop\rivet\src\parser.py", line 473, in parse_decl
    return self.parse_fn_decl(
    left = self.parse_shift_expr()
  File "C:\Users\Austen\Desktop\rivet\src\parser.py", line 737, in parse_shift_expr
    left = self.parse_additive_expr()
  File "C:\Users\Austen\Desktop\rivet\src\parser.py", line 758, in parse_additive_expr
    left = self.parse_multiplicative_expr()
  File "C:\Users\Austen\Desktop\rivet\src\parser.py", line 770, in parse_multiplicative_expr
    left = self.parse_unary_expr()
  File "C:\Users\Austen\Desktop\rivet\src\parser.py", line 791, in parse_unary_expr
    expr = self.parse_primary_expr()
  File "C:\Users\Austen\Desktop\rivet\src\parser.py", line 860, in parse_primary_expr
    elif self.tok.kind in (Kind.KeyUnsafe, Kind.Lbrace):

This PR adds basic support for generic functions. For now the compiler will support generic functions and structs, since that is all that is needed to develop the self-hosted compiler.

The syntax is similar to Rust:

fn gen<T>() { ... }

fn main() {
    gen::<i32>();
}

Note: generic type inference will be available in self-hosted, the syntax will be:

fn join<T>(arr: [T], sep: str = ", ") String { ... }

fn main() {
    println("{}", join::<>([1, 2, 3, 4]));
}