Starting from scratch on smaller scale, typechecking global and constant variables, compound expressions for arrays

.gitignore

@@ -3,3 +3,4 @@
 *.pdb
 *.txt
 *.4c
+*.bin

build.bat

@@ -1,3 +1,3 @@
 @echo off
 
-clang main.cpp -Wall -Wno-unused-function -fno-exceptions -fdiagnostics-absolute-paths -g -o main.exe -Wl,user32.lib
+clang main.cpp -I.. -Wall -Wno-unused-function -fno-exceptions -fdiagnostics-absolute-paths -g -o main.exe -Wl,user32.lib

main.c

@@ -1,29 +0,0 @@
-#define _CRT_SECURE_NO_WARNINGS
-#include <stdio.h>
-#include <windows.h>
-
-#include "lang.h"
-#include "os.h"
-#include "memory.h"
-
-#include "common.c"
-#include "memory.c"
-#include "os_win32.c"
-
-#include "lex.c"
-#include "ast.c"
-#include "print.c"
-#include "parse.c"
-#include "type.c"
-#include "resolve.c"
-
-int main(){
-  lex_test();
-  parse_test();
-  ast_test();
-  intern_test();
-  map_test();
-  array_test();
-  test_types();
-  resolve_test();
-}

new_ast.cpp

@@ -5,20 +5,29 @@
 // Parser::ast_arena                - arena for asts
 // Lexer::interns::string_allocator - arena for interns
 // 
-Intern_String keyword_const;
 Intern_String keyword_struct;
 Intern_String keyword_union;
+Intern_String keyword_cast;
 Intern_String keyword_enum;
 
+Intern_String intern_void;
+Intern_String intern_int;
+Intern_String intern_str;
+Intern_String intern_unsigned;
+
 const U64 Parse_Ctx_ID = 115151;
 struct Parse_Ctx:Lexer{
-  Arena ast_arena;
+  Allocator *perm; // Stores: AST, tokens, interns
+  Allocator *heap;
+  
+  Map global_syms;
+  Map type_map;
+  
   Token empty_token;
   S64 indent;
   S64 pt[256]; // precedence table
-  Map type_map;
   
-  void init(){
+  void init(Allocator *perm_allocator, Allocator *heap_allocator){
     const S64 addp = 1;
     const S64 mulp = 2;
     pt[TK_Add] = addp;
@@ -26,17 +35,28 @@ struct Parse_Ctx:Lexer{
     pt[TK_Div] = mulp;
     pt[TK_Mul] = mulp;
     
-    arena_init(&ast_arena, "AST Arena"_s);
+    perm = perm_allocator;
-    lex_init(this);
+    heap = heap_allocator;
-    keyword_const = intern_string(&interns, "const"_s);
+    
+    global_syms = {heap};
+    type_map    = {heap};
+    
+    lex_init(perm, heap, this);
     keyword_struct= intern_string(&interns, "struct"_s);
     keyword_union = intern_string(&interns, "union"_s);
+    keyword_cast = intern_string(&interns, "cast"_s);
     keyword_enum  = intern_string(&interns, "enum"_s);
-    interns.first_keyword = keyword_const.str;
+    interns.first_keyword = keyword_struct.str;
     interns.last_keyword  = keyword_enum.str;
+    
+    intern_void = intern_string(&interns, "void"_s);
+    intern_int = intern_string(&interns, "int"_s);
+    intern_str = intern_string(&interns, "String"_s);
+    intern_unsigned = intern_string(&interns, "unsigned"_s);
   }
 };
 
+thread_local Parse_Ctx *pctx;
 //-----------------------------------------------------------------------------
 // AST
 //-----------------------------------------------------------------------------
@@ -47,8 +67,11 @@ enum Ast_Kind{
   
   AK_Expr_Str,
   AK_Expr_Int,
+  AK_Expr_Cast,
   AK_Expr_Ident,
   AK_Expr_Binary,
+  AK_Expr_CompoundItem,
+  AK_Expr_Compound,
   
   AK_Decl_Func,
   AK_Decl_Func_Arg,
@@ -66,6 +89,7 @@ struct Ast{
   Token *pos;
 };
 
+struct Ast_Typespec;
 struct Ast_Expr:Ast{
   union{
     Intern_String intern_val;
@@ -75,6 +99,19 @@ struct Ast_Expr:Ast{
       Ast_Expr *left;
       Ast_Expr *right;
     } binary;
+    struct{
+      Ast_Typespec *typespec;
+      Array<Ast_Expr *> exprs;
+    }compound;
+    struct{
+      Ast_Expr *name; // index | name
+      Ast_Expr *index;
+      Ast_Expr *item;
+    }compound_item;
+    struct{
+      Ast_Expr *expr;
+      Ast_Typespec *typespec;
+    }cast;
   };
 };
 
@@ -98,7 +135,6 @@ struct Ast_Decl:Ast{
   union{
     struct{
       Ast_Typespec *typespec;
-      Intern_String name;
       Ast_Expr     *expr;
     }var;
     struct{
@@ -117,8 +153,7 @@ struct Ast_Package:Ast{
 // AST Constructors beginning with expressions
 //-----------------------------------------------------------------------------
 #define AST_NEW(T,ikind,ipos)                                 \
-Get_Ctx(Parse_Ctx);                                         \
+Ast_##T *result = exp_alloc_type(pctx->perm, Ast_##T); \
-Ast_##T *result = exp_alloc_type(&ctx->ast_arena, Ast_##T); \
 result->kind    = ikind;                                    \
 result->pos     = ipos
 
@@ -152,6 +187,31 @@ ast_expr_binary(Ast_Expr *left, Ast_Expr *right, Token *op){
   return result;
 }
 
+function Ast_Expr *
+ast_expr_compound(Token *pos, Ast_Typespec *typespec, Array<Ast_Expr *> exprs){
+  AST_NEW(Expr, AK_Expr_Compound, pos);
+  result->compound.typespec = typespec;
+  result->compound.exprs    = exprs.tight_copy(pctx->perm);
+  return result;
+}
+
+function Ast_Expr *
+ast_expr_compound_item(Token *pos, Ast_Expr *index, Ast_Expr *name, Ast_Expr *item){
+  AST_NEW(Expr, AK_Expr_CompoundItem, pos);
+  result->compound_item.name  = name;
+  result->compound_item.index = index;
+  result->compound_item.item  = item;
+  return result;
+}
+
+function Ast_Expr *
+ast_expr_cast(Token *pos, Ast_Expr *expr, Ast_Typespec *typespec){
+  AST_NEW(Expr, AK_Expr_Cast, pos);
+  result->cast.expr     = expr;
+  result->cast.typespec = typespec;
+  return result;
+}
+
 //-----------------------------------------------------------------------------
 // Typespecs
 //-----------------------------------------------------------------------------
@@ -177,6 +237,14 @@ ast_typespec_array(Token *pos, Ast_Typespec *base, Ast_Expr *expr){
   return result;
 }
 
+function Ast_Typespec *
+ast_typespec_func(Token *pos, Ast_Typespec *ret, Array<Ast_Typespec*> args){
+  AST_NEW(Typespec, AK_Typespec_Func, pos);
+  result->func.ret  = ret;
+  result->func.args = args.tight_copy(pctx->perm);
+  return result;
+}
+
 //-----------------------------------------------------------------------------
 // Declarations
 //-----------------------------------------------------------------------------
@@ -196,9 +264,17 @@ ast_decl_var(Token *pos, Ast_Typespec *typespec, Intern_String name, Ast_Expr *e
   return result;
 }
 
-function Ast_Package *
+function Ast_Decl *
-ast_package(Token *pos, String name){
+ast_decl_const(Token *pos, Intern_String name, Ast_Expr *expr){
-  AST_NEW(Package, AK_Package, pos);
+  Ast_Decl *result = ast_decl_var(pos, 0, name, expr);
-  result->name = intern_string(&ctx->interns, name);
+  result->kind = AK_Decl_Const;
+  return result;
+}
+
+function Ast_Package *
+ast_package(Token *pos, String name, Array<Ast_Decl *> decls){
+  AST_NEW(Package, AK_Package, pos);
+  result->decls = decls.tight_copy(pctx->perm);
+  result->name = intern_string(&pctx->interns, name);
   return result;
 }

new_lex.cpp

@@ -51,7 +51,6 @@ enum Token_Kind{
   TK_Colon,
   
   TK_Assign,
-  TK_ColonAssign,
   TK_DivAssign,
   TK_MulAssign,
   TK_ModAssign,
@@ -112,6 +111,7 @@ struct Lex_Stream{
   U8    *line_begin;
   String file;
   S32    line;
+  S32    inside_brace_paren;
 };
 
 struct Lexer{
@@ -169,7 +169,7 @@ lex_set_len(Lex_Stream *s, Token *token){
 function void
 lex_set_keywords(Lexer *lexer, Array<String> keywords){
   Intern_String keyword = {};
-  IFor(keywords){
+  Iter(keywords){
     keyword = intern_string(&lexer->interns, *it);
     if(it == keywords.begin()) 
       lexer->interns.first_keyword = keyword.str;
@@ -272,14 +272,14 @@ lex__stream(Intern_Table *table, Array<Token> *array, Lex_Stream *s){
     lex_advance(s);
     
     switch(*t.str){
-      case 0: break;
+      case  0 : break;
       case '@': t.kind = TK_At; break;
-      case '(': t.kind = TK_OpenParen; break;
+      case '(': s->inside_brace_paren++; t.kind = TK_OpenParen; break;
-      case ')': t.kind = TK_CloseParen; break;
+      case ')': s->inside_brace_paren--; t.kind = TK_CloseParen; break;
-      case '{': t.kind = TK_OpenBrace; break;
+      case '{': s->inside_brace_paren++; t.kind = TK_OpenBrace; break;
-      case '}': t.kind = TK_CloseBrace; break;
+      case '}': s->inside_brace_paren--; t.kind = TK_CloseBrace; break;
-      case '[': t.kind = TK_OpenBracket; break;
+      case '[': s->inside_brace_paren++; t.kind = TK_OpenBracket; break;
-      case ']': t.kind = TK_CloseBracket; break;
+      case ']': s->inside_brace_paren--; t.kind = TK_CloseBracket; break;
       case ',': t.kind = TK_Comma; break;
       case '~': t.kind = TK_Neg; break;
       case '?': t.kind = TK_Question; break;
@@ -371,10 +371,6 @@ lex__stream(Intern_Table *table, Array<Token> *array, Lex_Stream *s){
           lex_advance(s);
           t.kind = TK_DoubleColon;
         }
-        else if(lexc(s) == '='){
-          lex_advance(s);
-          t.kind = TK_ColonAssign;
-        }
         else {
           t.kind = TK_Colon;
         }
@@ -483,7 +479,10 @@ lex__stream(Intern_Table *table, Array<Token> *array, Lex_Stream *s){
     if(t.len==0)
       lex_set_len(s,&t);
     
+    B32 skip = t.kind == TK_NewLine && s->inside_brace_paren > 0;
+    if(!skip){
       array->add(t);
+    }
     
     while(lex_is_whitespace(lexc(s)))
       lex_advance(s);
@@ -494,15 +493,15 @@ lex__stream(Intern_Table *table, Array<Token> *array, Lex_Stream *s){
 }
 
 function void
-lex_init(Lexer *l){
+lex_init(Allocator *token_string_arena, Allocator *map_allocator, Lexer *l){
-  l->tokens = array_make<Token>(1024*2);
+  l->tokens = array_make<Token>(token_string_arena, 1024*2);
-  l->interns= intern_table_make(1024);
+  l->interns= intern_table_make(token_string_arena, map_allocator, 1024);
 }
 
 function Lexer
-lex_make(){
+lex_make(Allocator *token_string_arena, Allocator *map_allocator){
   Lexer result  = {};
-  lex_init(&result);
+  lex_init(token_string_arena, map_allocator, &result);
   return result;
 }
 
@@ -515,29 +514,30 @@ lex_restream(Lexer *lexer, String istream, String file){
 }
 
 function Lexer
-lex_stream(String istream, String file){
+lex_stream(Allocator *token_string_arena, Allocator *map_allocator, String istream, String file){
-  Lexer result = lex_make();
+  Lexer result = lex_make(token_string_arena, map_allocator);
   lex_restream(&result, istream, file);
   return result;
 }
 
 function void
-lex_test(){ Set_Scratch();
+lex_test(){
+  Scratch scratch;
   String test = "Keyword //R\n 18446744073709551616{})(@?&+-;....->,:::/**/\"Thing\" Thingy"
     "\"Test_Meme\"+=-===42524 4294967295 18446744073709551615"
     "for if while switch :="_s;
   
-  Array<String> keywords = {};
+  Array<String> keywords = {scratch};
   keywords.add("Keyword"_s);
   keywords.add("for"_s);
   keywords.add("if"_s);
   keywords.add("while"_s);
   keywords.add("switch"_s);
   
-  Lexer lexer = lex_make();
+  Lexer lexer = lex_make(scratch, scratch);
   lex_set_keywords(&lexer, keywords);
   lex_restream(&lexer, test, "Test1"_s);
-  Array<Token> array = lexer.tokens;
+  Array<Token> arr = lexer.tokens;
   
   Token_Kind kind[] = {
     TK_Keyword, TK_NewLine, TK_Error,TK_OpenBrace,TK_CloseBrace,TK_CloseParen,TK_OpenParen,
@@ -546,7 +546,7 @@ lex_test(){ Set_Scratch();
     TK_StringLit, TK_Identifier, TK_StringLit, TK_AddAssign, TK_SubAssign,
     TK_Equals, TK_Integer, TK_Integer, TK_Integer, 
     TK_Keyword, TK_Keyword, TK_Keyword, TK_Keyword, 
-    TK_ColonAssign, TK_End
+    TK_Colon, TK_Assign, TK_End
   };
   String strs[] = {
     "Keyword"_s, "\n "_s, "18446744073709551616"_s,"{"_s,"}"_s,")"_s,"("_s,
@@ -554,18 +554,18 @@ lex_test(){ Set_Scratch();
     "..."_s,"."_s,"->"_s,","_s,"::"_s,":"_s,
     "Thing"_s,"Thingy"_s,"Test_Meme"_s, "+="_s,"-="_s,
     "=="_s,"42524"_s,"4294967295"_s,"18446744073709551615"_s,
-    "for"_s, "if"_s, "while"_s, "switch"_s, ":="_s, ""_s,
+    "for"_s, "if"_s, "while"_s, "switch"_s, ":"_s, "="_s, ""_s,
   };
   U64 vals[] = {
     42524, 4294967295, 18446744073709551615llu
   };
   
   int ui = 0;
-  For(array, t, i){
+  For(arr){
-    assert(t->kind == kind[i]);
+    assert(it->kind == kind[i]);
-    assert(string_compare(t->string, strs[i]));
+    assert(string_compare(it->string, strs[i]));
-    if(t->kind == TK_Integer){
+    if(it->kind == TK_Integer){
-      assert(t->int_val == vals[ui++]);
+      assert(it->int_val == vals[ui++]);
     }
   }
 }
@@ -603,7 +603,6 @@ token_kind_string(Token_Kind kind){
     case TK_GreaterThen: return ">"_s;
     case TK_Colon: return ":"_s;
     case TK_Assign: return "="_s;
-    case TK_ColonAssign: return ":="_s;
     case TK_DivAssign: return "/="_s;
     case TK_MulAssign: return "*="_s;
     case TK_ModAssign: return "%="_s;
@@ -629,6 +628,7 @@ token_kind_string(Token_Kind kind){
     case TK_LeftShift: return "<<"_s;
     case TK_RightShift: return ">>"_s;
     case TK_Arrow: return "->"_s;
+    case TK_NewLine: return "NewLine"_s;
     case TK_ExprSizeof: return "sizeof"_s;
     case TK_DocComment: return "DocComment"_s;
     case TK_Comment: return "Comment"_s;

new_parse.cpp

@@ -1,22 +1,22 @@
 
 function Token *
-token_get(S64 i = 0){ Get_Ctx(Parse_Ctx);
+token_get(S64 i = 0){
-  i += ctx->token_iter;
+  i += pctx->token_iter;
-  if(i >= ctx->tokens.len){
+  if(i >= pctx->tokens.len){
-    return &ctx->empty_token;
+    return &pctx->empty_token;
   }
-  Token *result = &ctx->tokens[i];
+  Token *result = &pctx->tokens[i];
   if(result->kind == TK_NewLine){
-    ctx->indent = result->indent;
+    pctx->indent = result->indent;
   }
   
   return result;
 }
 
 function Token *
-token_next(){ Get_Ctx(Parse_Ctx);
+token_next(){ 
   Token *token = token_get();
-  ctx->token_iter++;
+  pctx->token_iter++;
   return token;
 }
 
@@ -52,8 +52,8 @@ token_match_keyword(Intern_String string){
 
 function void
 parsing_error(Token *token, const char *str, ...){ 
-  Set_Scratch();
+  Scratch scratch;
-  STRING_FMT(imp_get(), str, string);
+  STRING_FMT(scratch, str, string);
   
   // @Note(Krzosa): Print nice error message
   printf("\nError: %s", string.str);
@@ -122,6 +122,41 @@ Compound literals
 - { }
 */
 function Ast_Expr *parse_expr(S64 rbp = 0);
+function Ast_Typespec *parse_typespec();
+
+function Ast_Expr *
+parse_expr_compound(){
+  Scratch scratch;
+  Token *pos = token_get();
+  Array<Ast_Expr *> exprs = {scratch};
+  while(!token_is(TK_CloseBrace)){
+    Token *token = token_get();
+    Ast_Expr *index = 0;
+    Ast_Expr *name  = 0;
+    if(token_match(TK_OpenBracket)){
+      index = parse_expr();
+      token_expect(TK_CloseBracket);
+      token_expect(TK_Assign);
+    }
+    else if(token_is(TK_Identifier)){
+      token = token_next();
+      name = ast_expr_identifier(token, token->intern_val);
+      token_expect(TK_Assign);
+    }
+    
+    Ast_Expr *item = parse_expr();
+    Ast_Expr *item_comp = ast_expr_compound_item(token, index, name, item);
+    exprs.add(item_comp);
+    
+    if(!token_match(TK_Comma)){
+      break;
+    }
+  }
+  token_expect(TK_CloseBrace);
+  
+  Ast_Expr *result = ast_expr_compound(pos, 0, exprs);
+  return result;
+}
 
 function Ast_Expr *
 parse_expr_nud(Token *token){
@@ -129,14 +164,29 @@ parse_expr_nud(Token *token){
     case TK_StringLit: return ast_expr_string(token, token->intern_val);
     case TK_Identifier: return ast_expr_identifier(token, token->intern_val);
     case TK_Integer: return ast_expr_integer(token, token->int_val);
+    case TK_Keyword: {
+      if(token->intern_val == keyword_cast){
+        token_expect(TK_OpenParen);
+        Ast_Expr *expr = parse_expr();
+        token_expect(TK_Colon);
+        Ast_Typespec *typespec = parse_typespec();
+        token_expect(TK_CloseParen);
+        return ast_expr_cast(token, expr, typespec);
+      }
+      else {
+        parsing_error(token, "Unexpected keyword: [%s], expected keyword [cast]", token->intern_val.str); 
+        return 0;
+      }
+    }break;
+    case TK_OpenBrace: return parse_expr_compound();
     case TK_OpenParen: {Ast_Expr *result = parse_expr(); token_expect(TK_CloseParen); return result;}
     default: parsing_error(token, "Unexpected token of kind: [%s] in expression", token_kind_string(token->kind).str); return 0;
   }
 }
 
 function S64
-op_precedence(Token_Kind kind){ Get_Ctx(Parse_Ctx);
+op_precedence(Token_Kind kind){ 
-  S64 result = ctx->pt[kind];
+  S64 result = pctx->pt[kind];
   return result;
 }
 
@@ -183,22 +233,22 @@ expr_eval(Ast_Expr *expr){
 }
 
 #define TEST_PARSER()                 \
-Set_Scratch();         \
+Scratch scratch(thread_ctx.scratch);\
 Parse_Ctx ctx = {};                 \
-ctx.init();            \
+ctx.init(scratch, scratch);         \
-Set_Ctx(&ctx, Parse_Ctx_ID)
+pctx = &ctx
 
 function void
 test_parse_expr(){
   TEST_PARSER();
   struct Test{String str;S64 val;};
-  Array<Test> exprs = {};
+  Array<Test> exprs = {scratch};
   exprs.add({"(4+5)*2"_s, (4+5)*2});
   exprs.add({"4+5*2"_s, 4+5*2});
   exprs.add({"4*5+5"_s, 4*5+5});
   exprs.add({"4+5+5+3"_s, 4+5+5+3});
   
-  For(exprs,it,i){
+  Iter(exprs){
     lex_restream(&ctx, it->str, "test_expr"_s);
     Ast_Expr *result = parse_expr();
     S64 val = expr_eval(result);
@@ -209,38 +259,115 @@ test_parse_expr(){
 //-----------------------------------------------------------------------------
 // Parsing declarations
 //-----------------------------------------------------------------------------
-function Ast_Decl *
+function Ast_Typespec *
-parse_decl(){Get_Ctx(Parse_Ctx);
+parse_optional_type(){
-  Ast_Decl *result = 0;
+  Ast_Typespec *result = 0;
-  Token *token = token_match(TK_Identifier);
+  if(token_match(TK_Colon)) result = parse_typespec();
-  if(token){
+  return result;
-    if(token_match(TK_ColonAssign)){
+}
-      if(ctx->indent != 0)
-        parsing_error(token, "Top level declarations shouldn't be indented");
 
-      Ast_Expr *expr = parse_expr();
+function Ast_Typespec *
-      result = ast_decl_var(token, 0, token->intern_val, expr);
+parse_typespec_function(Token *token){
+  Scratch scratch;
+  Array<Ast_Typespec *> args = {scratch};
+  if(!token_is(TK_CloseParen)) {
+    for(;;) {
+      args.add(parse_typespec());
+      if(!token_match(TK_Comma)){
+        break;
       }
-    else parsing_error(token, "Encountered unexpected token while parsing a top level declarations");
+    }
+  }
+  token_expect(TK_CloseParen);
+  Ast_Typespec *ret = parse_optional_type();
+  Ast_Typespec *result = ast_typespec_func(token, ret, args);
+  return result;
+}
+
+// [10]*int - Array of 10 pointers to ints
+function Ast_Typespec *
+parse_typespec_recurse(){
+  Token *token = token_get();
+  if(token_match(TK_Mul)){
+    Ast_Typespec *result = parse_typespec_recurse();
+    result = ast_typespec_pointer(token, result);
+    return result;
+  }
+  else if(token_match(TK_OpenBracket)){
+    Ast_Expr *expr = parse_expr();
+    token_expect(TK_CloseBracket);
+    Ast_Typespec *result = parse_typespec_recurse();
+    result = ast_typespec_array(token, result, expr);
+    return result;
+  }
+  else if(token_match(TK_OpenParen)){
+    Ast_Typespec *result = parse_typespec_function(token);
+    return result;
+  }
+  else if(token_match(TK_Identifier)){
+    Ast_Typespec *result = ast_typespec_name(token, token->intern_val);
+    return result;
+  }
+  else{
+    parsing_error(token, "Failed to parse type, unexpected token of kind", token_kind_string(token->kind).str);
+    return 0;
+  }
+}
+
+function Ast_Typespec *
+parse_typespec(){
+  Ast_Typespec *result = parse_typespec_recurse();
+  return result;
+}
+
+function Ast_Expr *
+parse_assign_expr(){
+  Ast_Expr *result = 0;
+  if(token_match(TK_Assign)) result = parse_expr();
+  return result;
+}
+
+function Ast_Decl *
+parse_decl(){
+  Ast_Decl *result = 0;
+  if(token_is(TK_Identifier)){
+    if(pctx->indent != 0) parsing_error(token_get(), "Top level declarations shouldn't be indented");
+    Token *name = token_next();
+    if(token_match(TK_DoubleColon)){ // Constant
+      Ast_Expr *expr = parse_expr();
+      result = ast_decl_const(name, name->intern_val, expr);
+    }
+    else if(token_match(TK_Colon)){ 
+      Ast_Typespec *typespec = 0;
+      Ast_Expr     *expr     = 0;
+      if(!token_is(TK_Assign))   typespec = parse_typespec();
+      if(token_match(TK_Assign)) expr     = parse_expr();
+      if(!expr && !typespec) parsing_error(name, "invalid declaration, no type or value");
+      
+      result = ast_decl_var(name, typespec, name->intern_val, expr);
+    }
+    else{
+      Token *token = token_get();
+      parsing_error(token, "Unexpected token: [%s] when parsing a declaration", token_kind_string(token->kind).str);
+    }
+    
   }
   return result;
 }
 
 function Ast_Package *
 parse_file(){
-  Ast_Package *result = ast_package(token_get(), token_get()->file);
+  Scratch scratch;
+  Token *token = token_get();
+  Array<Ast_Decl *>decls = {scratch};
   while(!token_is(TK_End)){
     while(token_match(TK_NewLine));
     Ast_Decl *decl = parse_decl();
     if(!decl) break;
-    result->decls.add(decl);
+    decls.add(decl);
   }
+  Ast_Package *result = ast_package(token, token->file, decls);
   return result;
 }
 
-function void
+
-test_parse_decl(){
-  TEST_PARSER();
-  lex_restream(&ctx, "thing := 24252\nanother_thing := \"string\"\n\nref := thing"_s, "test_parse_decl"_s);
-  Ast_Package *result = parse_file();
-}

new_resolve.cpp

@@ -0,0 +1,309 @@
+#define Ast_Begin(kind,type) case kind: { type *node = (type *)ast;
+#define Ast_End() } break
+
+enum Sym_Kind{
+  SYM_None,
+  SYM_Type,
+  SYM_Const,
+  SYM_Var,
+};
+
+struct Sym{
+  Intern_String name;
+  Sym_Kind kind;
+  Ast_Decl *decl;
+  Type *type;
+  union{
+    S64 int_val;
+    Intern_String intern_val;
+  };
+};
+
+struct Operand{
+  Type *type;
+  bool is_const;
+  union {
+    S64  int_val;
+    Intern_String intern_val;
+  };
+};
+
+function void
+sym_insert(Sym *sym){
+  U64 hash = hash_string(sym->name.s);
+  Sym *is_sym = (Sym *)map_get_u64(&pctx->global_syms, hash);
+  if(is_sym){
+    parsing_error(sym->decl->pos, "Symbol with name: [%s] defined multiple times", sym->name.s.str); 
+  }
+  
+  map_insert_u64(&pctx->global_syms, hash, sym);
+}
+
+function Sym *
+sym_get(Intern_String name){
+  Sym *result = (Sym *)map_get_u64(&pctx->global_syms, hash_string(name.s));
+  return result;
+}
+
+function Sym *
+sym_new(Sym_Kind kind, Intern_String name, Type *type, Ast_Decl *decl){
+  Sym *result = exp_alloc_type(pctx->perm, Sym);
+  result->name = name;
+  result->kind = kind;
+  result->type = type;
+  result->decl = decl;
+  return result;
+}
+
+global Ast_Decl empty_decl = {};
+function void
+sym_insert_builtin_type(String name, Type *type){
+  Intern_String string = intern_string(&pctx->interns, name);
+  Sym *sym = sym_new(SYM_Type, string, type, &empty_decl);
+  sym_insert(sym);
+}
+
+function void
+sym_insert_builtins(){
+  sym_insert_builtin_type("void"_s, type_void);
+  sym_insert_builtin_type("bool"_s, type_bool);
+  sym_insert_builtin_type("int"_s, type_int);
+  sym_insert_builtin_type("String"_s, type_string);
+  
+  {
+    Intern_String string = intern_string(&pctx->interns, "true"_s);
+    Sym *sym = sym_new(SYM_Const, string, type_bool, &empty_decl);
+    sym_insert(sym);
+  }
+  
+  {
+    Intern_String string = intern_string(&pctx->interns, "false"_s);
+    Sym *sym = sym_new(SYM_Const, string, type_bool, &empty_decl);
+    sym_insert(sym);
+  }
+  
+  {
+    Intern_String string = intern_string(&pctx->interns, "null"_s);
+    Sym *sym = sym_new(SYM_Const, string, type_null, &empty_decl);
+    sym_insert(sym);
+  }
+  
+  
+}
+
+function Operand eval_expr(Ast_Expr *ast, Type *compound_required_type = 0);
+function Type *
+eval_typespec(Ast_Typespec *ast){
+  if(!ast) return 0;
+  
+  switch(ast->kind){
+    Ast_Begin(AK_Typespec_Ident, Ast_Typespec){
+      Sym *type_sym = sym_get(node->name);
+      if(!type_sym){
+        parsing_error(node->pos, "This type is not defined");
+      }
+      if(type_sym->kind != SYM_Type){
+        parsing_error(node->pos, "This identifier is not a type");
+      }
+      return type_sym->type;
+      Ast_End();
+    }
+    
+    Ast_Begin(AK_Typespec_Pointer, Ast_Typespec){
+      Type *type = eval_typespec(node->base);
+      Type *result = type_pointer(type);
+      return result;
+      Ast_End();
+    }
+    
+    Ast_Begin(AK_Typespec_Array, Ast_Typespec){
+      Type *type   = eval_typespec(node->arr.base);
+      Operand expr = eval_expr(node->arr.expr);
+      if(!expr.is_const) parsing_error(node->pos, "Array size is not a constant");
+      if(expr.type != type_int) parsing_error(node->pos, "Array size is expected to be of type int");
+      Type *result = type_array(type, expr.int_val);
+      return result;
+      Ast_End();
+    }
+    invalid_default_case;
+  }
+  return 0;
+}
+
+function Type *
+resolve_type_pair(Token *pos, Type *a, Type *b){
+  Type *result = 0;
+  if(!a && b) result = b;
+  else if(a && !b) result = a;
+  else if(!a && !b) parsing_error(pos, "Trying to resolve a type pair where both types are null");
+  else{ // a && b
+    if(b->kind == TYPE_Null) result = a;
+    else if(a->kind == TYPE_Null) result = b;
+    else if(a != b) parsing_error(pos, "Expression and type specification are differing");
+    else result = a; // Types are the same
+  }
+  
+  return result;
+}
+
+function Operand 
+eval_expr(Ast_Expr *ast, Type *exp_compound_type){
+  switch(ast->kind){
+    Ast_Begin(AK_Expr_Int, Ast_Expr){
+      Operand result = {type_int, true, {.int_val=(S64)node->int_val}};
+      return result;
+      Ast_End();
+    }
+    
+    Ast_Begin(AK_Expr_Str, Ast_Expr){
+      Operand result = {type_string, true, {.intern_val = node->intern_val}};
+      return result;
+      Ast_End();
+    }
+    
+    Ast_Begin(AK_Expr_Compound, Ast_Expr){
+      Type *type = eval_typespec(node->compound.typespec);
+      Type *variable_type = exp_compound_type;
+      if(!type && variable_type) type = variable_type;
+      else if(!variable_type && type);
+      else if(variable_type != type) parsing_error(node->pos, "Variable type different from explicit compound type");
+      
+      if(type->kind == TYPE_Array){
+        if(node->compound.exprs.len > type->arr.size) parsing_error(node->pos, "compound statement has too many items for this type");
+        Type *item_type = type->arr.base;
+        
+        For(node->compound.exprs){
+          assert(it[0]->kind == AK_Expr_CompoundItem);
+          if(it[0]->compound_item.name) parsing_error(it[0]->pos, "Invalid array indexing in compound expression");
+          if(it[0]->compound_item.index){
+            Operand index_op = eval_expr(it[0]->compound_item.index);
+            if(!index_op.is_const) parsing_error(it[0]->pos, "Index in a compound expression is not a constant");
+            if(index_op.type != type_int) parsing_error(it[0]->pos, "Index should be of type int");
+            if(index_op.int_val > (type->arr.size - 1)) parsing_error(it[0]->pos, "Invalid index in compound expression, larger then type can store");
+          }
+          Operand expr = eval_expr(it[0]->compound_item.item);
+          if(expr.type != item_type) parsing_error(it[0]->pos, "Invalid type of item in compound expression");
+        }
+      }
+      else parsing_error(node->pos, "Invalid compound expression type");
+      
+      Operand result = {type, false};
+      return result;
+      Ast_End();
+    }
+    
+    Ast_Begin(AK_Expr_Ident, Ast_Expr){
+      Sym *sym = sym_get(node->intern_val);
+      if(!sym){
+        parsing_error(node->pos, "Identifier is undefined");
+      }
+      
+      Operand result = {sym->type, sym->kind == SYM_Const ? true : false, {.int_val = sym->int_val}};
+      return result;
+      Ast_End();
+    }
+    
+    Ast_Begin(AK_Expr_Cast, Ast_Expr){
+      Operand expr = eval_expr(node->cast.expr);
+      Type *type = eval_typespec(node->cast.typespec);
+      
+      if(type == expr.type) return expr;
+      
+      else if(expr.type == type_int && type == type_bool){
+        expr.type = type_bool;
+        return expr;
+      }
+      
+      else if(expr.type == type_bool && type == type_int){
+        expr.type = type_int;
+        return expr;
+      }
+      
+      else if(expr.type == type_null){
+        expr.type = type;
+        return expr;
+      }
+      
+      else parsing_error(node->pos, "Failed to cast, incompatible types");
+      
+      Ast_End();
+    }
+    
+    Ast_Begin(AK_Expr_Binary, Ast_Expr){
+      Operand left = eval_expr(ast->binary.left);
+      Operand right = eval_expr(ast->binary.right);
+      Operand result = {};
+      result.type = resolve_type_pair(node->pos, left.type, right.type);
+      if(left.is_const && right.is_const){
+        result.is_const = true;
+        if(result.type == type_int){
+          switch(node->binary.op){
+            case TK_Add: result.int_val = left.int_val + right.int_val; break;
+            case TK_Sub: result.int_val = left.int_val - right.int_val; break;
+            case TK_Mul: result.int_val = left.int_val * right.int_val; break;
+            case TK_Div: result.int_val = left.int_val / right.int_val; break;
+            invalid_default_case;
+          }
+        }
+        else parsing_error(node->pos, "Arithmetic on type [TODO] is not supported");
+      }
+      
+      return result;
+      Ast_End();
+    }
+    
+    invalid_default_case;
+  }
+  
+  return {};
+}
+
+function void
+eval_decl(Ast *ast){
+  switch(ast->kind){
+    
+    Ast_Begin(AK_Package, Ast_Package){
+      For(node->decls) eval_decl(*it);
+      Ast_End();
+    }
+    
+    Ast_Begin(AK_Decl_Var, Ast_Decl){
+      Type *type = eval_typespec(node->var.typespec);
+      Operand expr = eval_expr(node->var.expr, type);
+      Type *resolved_type = resolve_type_pair(node->pos, type, expr.type);
+      
+      Sym *sym = sym_new(SYM_Var, node->name, resolved_type, node);
+      sym_insert(sym);
+      Ast_End();
+    }
+    
+    Ast_Begin(AK_Decl_Const, Ast_Decl){
+      Type *type = eval_typespec(node->var.typespec);
+      if(type && type->kind == TYPE_Pointer) parsing_error(node->pos, "Const cant be a pointer");
+      Operand expr = eval_expr(node->var.expr);
+      if(!expr.type) parsing_error(node->pos, "Constant value without expression");
+      if(!expr.is_const) parsing_error(node->pos, "Value of constant variable is not a constant expression");
+      Type *resolved_type = resolve_type_pair(node->pos, type, expr.type);
+      
+      Sym *sym = sym_new(SYM_Const, node->name, resolved_type, node);
+      if(resolved_type == type_int) sym->int_val = expr.int_val;
+      else if(resolved_type == type_string) sym->intern_val = expr.intern_val;
+      sym_insert(sym);
+      Ast_End();
+    }
+    
+    invalid_default_case;
+  }
+}
+
+function void
+test_resolve(){
+  TEST_PARSER();
+  String filename = "test3.kl"_s;
+  String file_content = os_read_file(scratch, filename);
+  lex_restream(&ctx, file_content, filename);
+  Ast_Package *result = parse_file();
+  sym_insert_builtins();
+  eval_decl(result);
+}
+

new_type.cpp

@@ -1,7 +1,9 @@
-
 enum Type_Kind{
   TYPE_None,
+  TYPE_Null,
   TYPE_Int,
+  TYPE_Bool,
+  TYPE_Unsigned,
   TYPE_String,
   TYPE_Void,
   TYPE_Pointer,
@@ -12,6 +14,22 @@ enum Type_Kind{
   TYPE_Enum,
 };
 
+const char *type_names[] = {
+  "[Invalid Type]",
+  "[TYPE_Null]",
+  "[TYPE_Int]",
+  "[TYPE_Bool]",
+  "[TYPE_Unsigned]",
+  "[TYPE_String]",
+  "[TYPE_Void]",
+  "[TYPE_Pointer]",
+  "[TYPE_Array]",
+  "[TYPE_Func]",
+  "[TYPE_Struct]",
+  "[TYPE_Union]",
+  "[TYPE_Enum]",
+};
+
 struct Type{
   Type_Kind kind;
   SizeU size;
@@ -32,13 +50,19 @@ struct Type{
 const SizeU pointer_size  = sizeof(SizeU);
 const SizeU pointer_align = __alignof(SizeU);
 
+global Type type__null = {TYPE_Null};
 global Type type__void = {TYPE_Void};
 global Type type__int = {TYPE_Int, sizeof(int), __alignof(int)};
+global Type type__unsigned = {TYPE_Int, sizeof(unsigned), __alignof(unsigned)};
 global Type type__string = {TYPE_String, sizeof(String), __alignof(String)};
+global Type type__bool = {TYPE_Bool, sizeof(bool), __alignof(bool)};
 
 global Type *type_void  = &type__void;
 global Type *type_int   = &type__int;
+global Type *type_unsigned   = &type__unsigned;
 global Type *type_string  = &type__string;
+global Type *type_bool  = &type__bool;
+global Type *type_null  = &type__null;
 
 function Type *
 type_new(Allocator *allocator, Type_Kind kind, SizeU size, SizeU align){
@@ -58,12 +82,11 @@ type_copy(Allocator *a, Type *type){
 
 function Type *
 type_pointer(Type *base){
-  Get_Ctx(Parse_Ctx);
+  Type *result = (Type *)map_get(&pctx->type_map, (void *)base);
-  Type *result = (Type *)map_get(&ctx->type_map, (void *)base);
   if(!result){
-    result = type_new(&ctx->ast_arena, TYPE_Pointer, pointer_size, pointer_align);
+    result = type_new(pctx->perm, TYPE_Pointer, pointer_size, pointer_align);
     result->base = base;
-    map_insert(&ctx->type_map, base, result);
+    map_insert(&pctx->type_map, base, result);
   }
   assert(result->kind == TYPE_Pointer);
   return result;
@@ -71,9 +94,8 @@ type_pointer(Type *base){
 
 function Type *
 type_array(Type *base, SizeU size){
-  Get_Ctx(Parse_Ctx);
   U64 hash = hash_mix(hash_ptr(base), hash_u64(size));
-  Type *result = (Type *)map_get_u64(&ctx->type_map, hash);
+  Type *result = (Type *)map_get_u64(&pctx->type_map, hash);
   if(result){
     assert(result->kind == TYPE_Array);
     assert(result->arr.size == size);
@@ -81,44 +103,40 @@ type_array(Type *base, SizeU size){
     return result;
   }
   
-  result = type_new(&ctx->ast_arena, TYPE_Array, pointer_size, pointer_align);
+  result = type_new(pctx->perm, TYPE_Array, pointer_size, pointer_align);
   result->arr.base = base;
   result->arr.size = size;
-  map_insert_u64(&ctx->type_map, hash, result);
+  map_insert_u64(&pctx->type_map, hash, result);
   return result;
 }
 
 function Type *
 type_function(Type *ret, Array<Type *> args){
-  Get_Ctx(Parse_Ctx);
-  
   U64 hash = hash_ptr(ret);
-  IFor(args){
+  For(args) hash = hash_mix(hash, hash_ptr(*it));
-    hash = hash_mix(hash, hash_ptr(*it));
+  Type *result = (Type *)map_get_u64(&pctx->type_map, hash);
-  }
   
-  Type *result = (Type *)map_get_u64(&ctx->type_map, hash);
   if(result){
     assert(result->kind == TYPE_Func);
     assert(result->func.ret == ret);
     assert(result->func.args.len == args.len);
     return result;
   }
-  result = type_new(&ctx->ast_arena, TYPE_Func, pointer_size, pointer_align);
+  
+  result = type_new(pctx->perm, TYPE_Func, pointer_size, pointer_align);
   result->func.ret = ret;
-  result->func.args = args.copy(&ctx->ast_arena);
+  result->func.args = args.tight_copy(pctx->perm);
-  map_insert_u64(&ctx->type_map, hash, result);
+  map_insert_u64(&pctx->type_map, hash, result);
   
   return result;
 }
 
 function void
 test_types(){
-  Set_Backup_Scratch();
+  Scratch scratch;
-  Set_Scratch();
   Parse_Ctx ctx = {};
-  Set_Ctx(&ctx, Parse_Ctx_ID);
+  ctx.init(scratch, scratch);
-  ctx.ast_arena = thread_ctx.scratch[1];
+  pctx = &ctx;
   
   Type *array_type1 = type_array(type_int, 32);
   Type *array_type2 = type_array(type_int, 32);
@@ -133,13 +151,13 @@ test_types(){
   assert(pointer_type3 != pointer_type1);
   assert(pointer_type3 == pointer_type4);
   
-  Array<Type*> types = {};
+  Array<Type*> types = {scratch};
   types.add(type_array(type_int, 32));
   Type *func_type1 = type_function(types[0], types);
   Type *func_type2 = type_function(types[0], types);
   assert(func_type1 == func_type2);
   
-  Array<Type*> types2 = {};
+  Array<Type*> types2 = {scratch};
   {
     types2.add(type_array(type_int, 32));
     types2.add(type_int);

os_win32.c

@@ -1,23 +1,6 @@
 function S32 os_main();
 const SizeU page_size = 4096;
 
-function String
-os_read_file(Arena *arena, String name){
-  String result = {0};
-  FILE *f = fopen((char *)name.str, "rb");
-  assert(f);
-  fseek(f, 0, SEEK_END);
-  result.len = ftell(f);
-  fseek(f, 0, SEEK_SET);
-  
-  result.str = (U8 *)arena_push_size(arena, result.len + 1);
-  fread(result.str, result.len, 1, f);
-  fclose(f);
-  
-  result.str[result.len] = 0;
-  return result;
-}
-
 function SizeU
 get_align_offset(SizeU size, SizeU align){
   SizeU mask = align - 1;

resolve.c

@@ -1,28 +0,0 @@
-typedef struct Sym Sym;
-
-typedef enum Sym_Kind{
-  Sym_Kind_None,
-  Sym_Kind_Type,
-  Sym_Kind_Const,
-  Sym_Kind_Func,
-}Sym_Kind;
-
-typedef enum Sym_State{
-  Sym_State_NotVisited,
-  Sym_State_Visited,
-};
-
-struct Sym{
-  Sym_Kind kind;
-  Sym_State state;
-  AST *ast;
-  Type *type;
-};
-
-global Sym *global_syms;
-
-
-
-function void
-resolve_test(){
-}

test3.kl

@@ -0,0 +1,58 @@
+
+boolean: bool      = true
+value_of_bool: int = cast(boolean: int)
+base              := null
+
+array1: [4]int = {1,2,3,4}
+array2: [32]int = {1,2,3,4}
+array3: [32]int   = {
+  [0] = 0,
+  [31] = 31,
+}
+
+/*
+
+pointer: *int
+variable: int = *pointer
+pointer_from_var := ^variable
+
+pointer := &base
+base_from_pointer := *pointer
+
+structure: Data = {}
+
+array2: [4]int = {
+  [0] = 0,
+  [1] = 1
+}
+array_to_pointer: *[4]int = &array1
+array_to_pointer_imp :    = &array1
+
+
+*/
+//-----------------------------------------------------------------------------
+// Implicit type
+//-----------------------------------------------------------------------------
+implicit_int :: 10
+implicit_str :: "Hello world"
+
+//-----------------------------------------------------------------------------
+// Pointers
+//-----------------------------------------------------------------------------
+pointer:     *int = cast(null: *int)
+pointer2:    *int = null
+pointer3:   **int = null
+
+//-----------------------------------------------------------------------------
+// String types
+//-----------------------------------------------------------------------------
+string1 :: "Test"
+string2 :: string1
+
+//-----------------------------------------------------------------------------
+// Constant int variables
+//-----------------------------------------------------------------------------
+thing0 :: 10
+thing1 :: thing0 + 11
+thing2 :: thing1 + 20
+combin :: thing0 + thing1 + thing2