rm make_exprs.py, moving to the c part

.gitignore

@@ -1,2 +1 @@
 zig-cache/
-*.mypy_cache*

scripts/make_exprs.py

@@ -1,59 +0,0 @@
-#!/usr/bin/python3.6
-
-from pathlib import Path
-
-EXPR_TYPES = {
-    'Binary': ('left: Expr', 'operator: Token', 'right: Expr'),
-    'Grouping': ('expression: Expr',),
-    'Unary': ('operator: Token', 'right: Expr'),
-
-    # NOTE: when adding new Literals, add new Literal types, instead of just
-    # doing Literal with an 'Object value'. it won't work.
-}
-
-def _gen_expr_decls():
-    res = []
-
-    for expr_type, expr_params in EXPR_TYPES.items():
-        res.append(f'pub const {expr_type} = struct {{')
-
-        for param in expr_params:
-            res.append(f'    {param},')
-
-        res.append('};\n')
-
-    return '\n'.join(res)
-
-
-def do_base_union(union_name: str):
-    res = [
-        'const Token = @import("token.zig").Token;\n'
-    ]
-
-    res.append(_gen_expr_decls())
-
-    res.append(f'pub const {union_name}Type = enum {{')
-    for expr_type in EXPR_TYPES:
-        res.append(f'    {expr_type},')
-    res.append('};\n')
-
-
-    res.append(f'pub const {union_name} = union({union_name}Type) {{')
-
-    for expr_type in EXPR_TYPES:
-        res.append(f'    {expr_type}: {expr_type},')
-
-    res.append('};\n')
-
-    return '\n'.join(res)
-
-
-def main():
-    expr_file = Path('./src') / 'expr.zig'
-    expr_file.touch()
-    expr_file.unlink()
-    expr_file.write_text(do_base_union('Expr'))
-
-
-if __name__ == '__main__':
-    main()