corelang/main.cpp

/*
-------------------------------------------------------------------------------

2022.05.28 - On lambda expressions
I think it's not wise to add the multiline lambda expressions
As is the case with python it would require new alternative syntax.
The idea was to imply that the whitespace significant syntax is just
inserting '{' '}' ';' automatically and if you decide to write a brace
it stops being whitespace significant and you can type everything with semicolons and braces
Problem is first of all it's kind of weird to have a completly different syntax
in a language to solve something that is a minor inconvenience,
second of all it turned out to be kind of bad, maybe if it would be more
complicated then it would be ok but it implies that you have to semicolon end
a lot of thing unintuitively.

Probably single line lambdas should be ok. Currently braces turn off indentation
awareness. There might be something you can do by trying to turn that on
problem is that complicates parsing a lot cause you have to account for multiple
indent styles, which means error messages become bad.

-------------------------------------------------------------------------------

2022.05.30 - On constructors and compound expressions
I unified the compound expression syntax (Type){} with function call syntax Type().
It's differentiating on whether you used type. I think there is a benefit to the language
not having an idea of overloading the type constructor. You will always know what will happen.
Unlike C++ for example. It seems like a minefield that can fuck your mind up. So many corner cases
and variants. having the idea of compounds doing one thing is reassuring I think.
You can always do a constructor by writing a function with lower case type if you want that.
For now I don't thing it should be overloadable.

-------------------------------------------------------------------------------

We compile lot's of files, we keep track of them in Parse_Ctx, making sure we don't
parse same thing twice. Files belong to a module, files can be loaded #load "file".
All the files see all the decls from all the files in that module. We can import
other modules using a different directive #import. #import perhaps should be lazily
evaluated, making sure we don't resolve stuff we don't require. Currently probably
want to export all the symbols, we can namespace them optionally.

-------------------------------------------------------------------------------

@todo
[ ] - Probably need to give Ast_Expr a Value field, then I can express Type nicely
[ ] - I would love for String, slice, Any etc. to have their struct declarations in source files, I also would want for stuff like string.str to work without weird special cases

[ ] - #test construct that would gather all tests and run them on start of program or something
[ ] - Foreign import that would link library
[ ] - Builtin dynamic arrays
[ ] - Kilobyte, Megabyte, Gigabyte
[ ] - Cast from array to pointer?
[ ] - Mixing loads and imports leads to code duplication, is that what we want???
[ ] - Fix field access, cant cast, cant index
[ ] - Add parent_scope to Ast_Type, Add name to Ast_Type?
[ ] - Some way to take slice of data
[ ] - Optional function renaming in codegen
[ ] - Using in structs to embed members, then casting offsets to that embedded member
[ ] - Type as a parameter to a function, alloc :: (size: U64, type: Type)

[ ] - Comma notation when declaring variables thing1, thing2: S32 :: probably want to unify it with var unpacking
[ ] - Add single line lambda expressions
[ ] - Ternary operator
[ ] - Disable ability to parse inner structs, functions, constants etc. ?
[ ] - Write up on order independent declarations

[ ] - Consider changing syntax of scopes to use braces { }
[ ] - Order independent declarations in structs ?
[ ] - constructor => thing :: (i: S32) -> {i = i, thing = 10}
[ ] - Casting to basic types by call S64(x)
[ ] - Default values in structs??? Should compound stmts bring values from default values?? Maybe not? Whats the alternative

@ideas
[ ] - Var args using Any array - args: []Any - delete vargs
[ ] - [Using] keyword that brings in the struct enviroment into current scope etc.
[ ] - Constant arrays that evaluate fully at compile time
[ ] - Rust like enum where you associate values(other structs) with keys
[ ] - Compound that zeros values - .{} , Compound that assumes defaults from struct definition - {}
[ ] - Inject stack traces into the program
[ ] - Conditional compilation #if
[ ] - Polymorphism - create declaration of a polymorphic thing, when it's called just copy it, replace types and typecheck normally, when someone calls again you just search for the instantiation again

@donzo
[x] - Implementing type Any
[x] - Runtime TypeInfo
[x] - Proper type Type support
[x] - Switch
[x] - Type aliases :: should probably be strictly typed, but assigning constant values should work
[x] - Array of inferred size
[x] - Casting pointers to and from void should be implicit
[x] - Multiple return values
[x] - Add c string
[-] - Should compound resolution use an algorithm to reorder compounds to initialize all fields in order
[x] - slices should be properly displayed in debugger
[x] - Imports inside of import shouldn't spill outside
[x] - Scope
[x] - #assert that handles constants at compile time and vars at runtime
[x] - Hex 0x42
[x] - Rewrite where # happen,
[x] - elif
[x] - cast ->
[x] - Remodel compound from call to {}
[x] - Fix codegen renames
[x] - Field access rewrite
[-] - Constants embeded in structs should be able to refer to other constants in that namespace without prefix
[-] - Order independent constants in structs
[-] - Fix recursive lambdas in structs
[x] - Error message when file not found
[x] - Better error messages when type difference
[-] - Fixing access to functions/structs, in C we cant have functons inside of structs / functions so we need to rewrite the tree
[x] - Emitting #line
[x] - Making sure debugger works
[x] - We need ++ -- operators
[x] - Arrays with size passed
[x] - Values inited to 0 by default
[x] - Some way to call foreign functions
[x] - We are parsing wrong here: (t.str=(&string_to_lex.str)[i]);
[x] - Test new operators, add constant eval for them
[x] - lvalue, rvalue concept so we cant assign value to some arbitrary weird expression
[x] - Passing down program to compile through command line
[x] - More basic types
[x] - Implementing required operations int128
[x] - Fix casting
[x] - More for loop variations
[x] - Add basic support for floats
[x] - Converting from U64 token to S64 Atom introduces unnanounced error (negates) - probably need big int
[x] - Add basic setup for new type system
[x] - Access through struct names to constants Arena.CONSTANT
[x] - Enums
[x] - Make sure pointer arithmetic works
[x] - Initial for loop
[x] - Enum . access to values
[x] - Character literal
[x] - Compiling and running a program
[x] - Infinite for loop
[x] - in new typesystem: Fix calls, fix all example programs
[x] - Fix arithmetic operations in new type system
[x] - Init statements, different kinds [+=] [-=] etc.
[x] - Struct calls
[x] - Operators: Bit negation, Not
[x] - Default values in calls
[x] - Resolving calls with default values
[x] - Pass statement
[x] - Lexer: Need to insert scope endings when hitting End of file
[x] - Resolving calls with named args, with indexed args
[x] - Structs
[x] - Struct field access
[x] - Struct field access with dots while compiling to arrows in c
[x] - Typespecs should probably be expressions so stuff like would be possible :: *[32]int
[x] - Initial order independence algorithm
[x] - Think about compound expressions, unify with calls - maybe Thing(a=1) instead of Thing{a=1}
*/

#include "base.cpp"
#include "base_unicode.cpp"
#include "big_int_c3.cpp"
#include "compiler.h"
#include "lexing.cpp"
#include "types.h"
#include "ast.cpp"
#include "parsing.cpp"
#include "typechecking.h"
#include "typechecking.cpp"
#include "ccodegen.cpp"

int main(int argument_count, char **arguments){

  test_os_memory();
  thread_ctx_init();
  test_unicode();

  map_test();
  test_array();
  test_string_builder();
  test_intern_table();


  emit_line_directives = true;
  String program_name = "main.kl"_s;
  if(argument_count > 1){
    program_name = string_from_cstring(arguments[1]);
  }

  F64 total_time = os_time();
  begin_compilation();

  {
    Ast_Module *module = add_module(0, pctx->intern("language.kl"_s));
    insert_builtin_types_into_scope(module);
    pctx->language_base_module = module;
    parse_all_modules();
    resolve_everything_in_module(module);

    // @note: language stuff needs to be declared before type_info data
    // so we mark where it ends
    pctx->base_language_ordered_decl_len = pctx->ordered_decls.len;
    Ast_Decl *any_decl = search_for_decl(module, pctx->intern("Any"_s));
    assert(any_decl->type == type_type);
    type_any = any_decl->type_val;
  }

  Ast_Module *module = add_module(0, pctx->intern(program_name));
  parse_all_modules();
  assert(module);
  // resolve_everything_in_module(pctx->language_base_module);
  resolve_everything_in_module(module);


  arena_clear(&pctx->stage_arena);
  String result = get_compilation_result();
  assert(os_write_file("program.c"_s, result));
  {
    Scratch scratch;
    F64 begin = os_time();
    String compiler_call =  string_fmt(scratch, "clang.exe program.c -Wall -Wno-parentheses-equality -g -o a.exe -lgdi32 -luser32 -lwinmm");
    system((const char *)compiler_call.str);
    printf("\nclang     = %f", os_time() - begin);
  }

  printf("\ntotal     = %f", os_time() - total_time);
  printf("\nparsing   = %f", parsing_time_end - parsing_time_begin);
  printf("\nresolving = %f", resolving_time_end - resolving_time_begin);
  printf("\ngeneratin = %f", generating_time_end - generating_time_begin);
  __debugbreak();
}