More parsing of expressions

generated.c

@@ -1,69 +0,0 @@
-typedef struct Token_Bucket Token_Bucket;
-typedef struct Token_Array Token_Array;
-struct Token_Bucket{
-Token_Bucket*next;
-Token data[4096];
-};
-struct Token_Array{
-Intern_Table interns;
-Token_Bucket first;
-Token_Bucket*last;
-S64 len;
-S64 block;
-Arena*arena;
-Token_Bucket*iter_bucket;
-S64 iter_len;
-S64 iter_block;
-};
-function Token_Array token_array_make(Arena*arena){
-Token_Array result={
-.last=&result.first,.arena=arena,.interns=intern_table(arena,4096*4)};
-return result;
-}
-function void token_array_push(Token_Array*array,Token*p){
-if(array->len>=buff_cap(array->first.data)){
-Token_Bucket*bucket=arena_push_struct(array->arena,Token_Bucket);
-array->last=array->last->next=bucket;
-array->len=0;
-array->block+=1;
-}
-array->last->data[array->len++]=*p;
-}
-function B32 token_array_iter_is_end(Token_Array*array){
-B32 result=array->iter_len==array->len&&array->iter_block==array->block;
-return result;
-}
-function Token*token_array_iter_next(Token_Array*array){
-if(token_array_iter_is_end(array)){
-return0;
-}
-if(array->iter_len>=buff_cap(array->first.data)){
-array->iter_len=0;
-array->iter_block+=1;
-array->iter_bucket=array->iter_bucket->next;
-}
-Token*result=array->iter_bucket->data+array->iter_len++;
-return result;
-}
-function Token*token_array_iter_peek(Token_Array*array,S64 i){
-S64 save_len=array->iter_len;
-Token_Bucket*save_bucket=array->iter_bucket;
-assert(i<buff_cap(array->first.data));
-S64 over=i;
-if(array->iter_len+i>=buff_cap(array->first.data)){
-over=buff_cap(array->first.data)-(array->iter_len+i);
-array->iter_len=0;
-array->iter_bucket=array->iter_bucket->next;
-}
-Token*result=array->iter_bucket->data+array->iter_len+over;
-array->iter_len=save_len;
-array->iter_bucket=save_bucket;
-return result;
-}
-function Token*token_array_iter_begin(Token_Array*array){
-array->iter_len=0;
-array->iter_block=0;
-array->iter_bucket=&array->first;
-Token*result=token_array_iter_next(array);
-return result;
-}

generated_lex.h

@@ -8,129 +8,91 @@ typedef struct Lex_Stream Lex_Stream;
 typedef struct Tokens Tokens;
 
 struct Intern_String{
-String s;
+  String s;
 };
 
 typedef enum Token_Kind{
-TK_End,
+  TK_End,
-TK_Mul,
+  TK_Mul,
-TK_Div,
+  TK_Div,
-TK_Add,
+  TK_Add,
-TK_Sub,
+  TK_Sub,
-TK_Mod,
+  TK_Mod,
-TK_BitAnd,
+  TK_BitAnd,
-TK_BitOr,
+  TK_BitOr,
-TK_BitXor,
+  TK_BitXor,
-TK_Neg,
+  TK_Neg,
-TK_Not,
+  TK_Not,
-TK_OpenParen,
+  TK_OpenParen,
-TK_CloseParen,
+  TK_CloseParen,
-TK_OpenBrace,
+  TK_OpenBrace,
-TK_CloseBrace,
+  TK_CloseBrace,
-TK_OpenBracket,
+  TK_OpenBracket,
-TK_CloseBracket,
+  TK_CloseBracket,
-TK_Comma,
+  TK_Comma,
-TK_Pound,
+  TK_Pound,
-TK_Question,
+  TK_Question,
-TK_ThreeDots,
+  TK_ThreeDots,
-TK_Semicolon,
+  TK_Semicolon,
-TK_Dot,
+  TK_Dot,
-TK_LesserThen,
+  TK_LesserThen,
-TK_GreaterThen,
+  TK_GreaterThen,
-TK_Colon,
+  TK_Colon,
-TK_Assign,
+  TK_Assign,
-TK_DivAssign,
+  TK_DivAssign,
-TK_MulAssign,
+  TK_MulAssign,
-TK_ModAssign,
+  TK_ModAssign,
-TK_SubAssign,
+  TK_SubAssign,
-TK_AddAssign,
+  TK_AddAssign,
-TK_AndAssign,
+  TK_AndAssign,
-TK_OrAssign,
+  TK_OrAssign,
-TK_XorAssign,
+  TK_XorAssign,
-TK_LeftShiftAssign,
+  TK_LeftShiftAssign,
-TK_RightShiftAssign,
+  TK_RightShiftAssign,
-TK_DoubleColon,
+  TK_DoubleColon,
-TK_At,
+  TK_At,
-TK_Decrement,
+  TK_Decrement,
-TK_Increment,
+  TK_Increment,
-TK_PostDecrement,
+  TK_PostDecrement,
-TK_PostIncrement,
+  TK_PostIncrement,
-TK_LesserThenOrEqual,
+  TK_LesserThenOrEqual,
-TK_GreaterThenOrEqual,
+  TK_GreaterThenOrEqual,
-TK_Equals,
+  TK_Equals,
-TK_And,
+  TK_And,
-TK_Or,
+  TK_Or,
-TK_NotEquals,
+  TK_NotEquals,
-TK_LeftShift,
+  TK_LeftShift,
-TK_RightShift,
+  TK_RightShift,
-TK_Arrow,
+  TK_Arrow,
-TK_ExprSizeof,
+  TK_ExprSizeof,
-TK_DocComment,
+  TK_DocComment,
-TK_Comment,
+  TK_Comment,
-TK_Identifier,
+  TK_Identifier,
-TK_StringLit,
+  TK_StringLit,
-TK_U8Lit,
+  TK_U8Lit,
-TK_Character,
+  TK_Character,
-TK_Error,
+  TK_Error,
-TK_Float,
+  TK_Float,
-TK_Int,
+  TK_Int,
-TK_Keyword,
+  TK_Keyword,
 }Token_Kind;
 
 struct Token{
-Token_Kind kind;
+  Token_Kind kind;
-union{
+  union{
-struct{
+    struct{
-U8 (*str);
+      U8 (*str);
-S64 len;
+      S64 len;
-};
+    };
-String string;
+    String string;
-};
+  };
-union{
+  union{
-S64 int_val;
+    S64 int_val;
-String error_val;
+    String error_val;
-Intern_String intern_val;
+    Intern_String intern_val;
-};
+  };
-String file;
+  String file;
-S64 line;
+  S64 line;
-U8 (*line_begin);
+  U8 (*line_begin);
-};
-
-// Generated Array block
-typedef struct Token_Array Token_Array;
-typedef struct Token_Array_Block Token_Array_Block;
-typedef struct Token_Array_Iter Token_Array_Iter;
-struct Token_Array_Block{
-Token_Array_Block*next;
-Token data[4096];
-};
-struct Token_Array_Iter{
-Token_Array_Block*block;
-U32 iter_len;
-U32 iter_block;
-U32 total_len;
-U32 total_block;
-};
-struct Token_Array{
-Token_Array_Block first;
-Token_Array_Block*last;
-Token_Array_Iter it;
-Arena*arena;
-S64 block;
-S64 len;
-};
-
-struct Lex_Stream{
-U8 (*stream);
-U8 (*line_begin);
-String filename;
-S64 line;
-};
-
-struct Tokens{
-Token (*tokens);
-S64 len;
-S64 cap;
-S64 iter;
 };
 

new_ast.c

@@ -4,6 +4,7 @@ typedef struct Decl Decl;
 typedef struct Stmt Stmt;
 typedef struct Stmt_If Stmt_If;
 typedef struct Typespec Typespec;
+typedef struct Typespec_Function_Arg Typespec_Function_Arg;
 typedef struct Decl_Enum_Child Decl_Enum_Child;
 typedef struct Decl_Function_Arg Decl_Function_Arg;
 typedef struct Expr_Compound_Field Expr_Compound_Field;
@@ -130,15 +131,20 @@ typedef enum Typespec_Kind{
   TS_Pointer,
   TS_Array,
   TS_Function,
+  TS_NamedArgument,
 }Typespec_Kind;
 
 struct Typespec{
-  Typespec_Kind kind;
   Typespec *next;
+  Typespec_Kind kind;
   Token *pos;
   union{
-    Intern_String name;
     Typespec *base;
+    Intern_String name;
+    struct{
+      Intern_String name;
+      Typespec *base;
+    }named;
     struct{
       Typespec *first;
       Typespec *last;
@@ -165,15 +171,6 @@ typedef enum Decl_Kind{
   DECL_List,
 }Decl_Kind;
 
-struct Note{
-  Token *pos;
-  Intern_String name;
-  Expr *expr;
-  Note *next;
-  Note *first;
-  Note *last;
-};
-
 struct Decl{
   Decl_Kind kind;
   Decl *next;
@@ -208,7 +205,7 @@ struct Decl{
       Decl_Function_Arg *first;
       Decl_Function_Arg *last;
       Typespec *ret;
-      //Stmt *body;
+      Stmt *body;
     }func_decl;
     struct{
       Decl *first;
@@ -217,6 +214,15 @@ struct Decl{
   };
 };
 
+struct Note{
+  Token *pos;
+  Intern_String name;
+  Expr *expr;
+  Note *next;
+  Note *first;
+  Note *last;
+};
+
 struct Decl_Function_Arg{
   Decl_Function_Arg *next;
   Token *pos;
@@ -439,11 +445,148 @@ expr_compound_push(Expr *list, Expr_Compound_Field *field){
   SLLQueuePush(list->compound.first, list->compound.last, field);
 }
 
+//-----------------------------------------------------------------------------
+// Type specifier constructors
+//-----------------------------------------------------------------------------
+function Typespec *
+typespec_new(Arena *p, Typespec_Kind kind, Token *pos){
+  Typespec *result = arena_push_struct(p, Typespec);
+  result->kind = kind;
+  result->pos = pos;
+  return result;
+}
+
+function Typespec *
+typespec_name(Arena *p, Token *pos, Intern_String name){
+  Typespec *result = typespec_new(p, TS_Name, pos);
+  result->name = name;
+  return result;
+}
+
+function Typespec *
+typespec_pointer(Arena *p, Token *pos, Typespec *base){
+  Typespec *result = typespec_new(p, TS_Pointer, pos);
+  result->base = base;
+  return result;
+}
+
+function Typespec *
+typespec_array(Arena *p, Token *pos, Typespec *base, Expr *size){
+  Typespec *result = typespec_new(p, TS_Array, pos);
+  result->arr.base = base;
+  result->arr.size = size;
+  return result;
+}
+
+function Typespec *
+typespec_function(Arena *p, Token *pos, Typespec *ret){
+  Typespec *result = typespec_new(p, TS_Function, pos);
+  result->func.ret = ret;
+  return result;
+}
+
+function Typespec *
+typespec_named_argument(Arena *arena, Token *pos, Typespec *typespec, Intern_String name){
+  Typespec *result = typespec_new(arena, TS_NamedArgument, pos);
+  result->named.base = typespec;
+  result->named.name = name;
+  return result;
+}
+
+function void
+typespec_function_push(Typespec *func, Typespec *arg){
+  SLLQueuePush(func->func.first, func->func.last, arg);
+}
+
+//-----------------------------------------------------------------------------
+// Declarations
+//-----------------------------------------------------------------------------
+function Decl *
+decl_new(Arena *p, Decl_Kind kind, Token *pos, Intern_String name){
+  Decl *result = arena_push_struct(p, Decl);
+  result->kind = kind;
+  result->pos = pos;
+  result->name = name;
+  return result;
+}
+
+function Decl *
+decl_struct(Arena *p, Decl_Kind kind, Token *pos, Intern_String name){
+  assert(kind == DECL_Struct || kind == DECL_Union);
+  Decl *result = decl_new(p, kind, pos, name);
+  return result;
+}
+
+function Decl *
+decl_typedef(Arena *p, Token *pos, Intern_String name, Typespec *type){
+  Decl *result = decl_new(p, DECL_Typedef, pos, name);
+  result->typedef_decl.type = type;
+  return result;
+}
+
+function Decl *
+decl_enum(Arena *p, Token *pos, Intern_String name, Typespec *typespec){
+  Decl *result = decl_new(p, DECL_Enum, pos, name);
+  result->enum_decl.typespec = typespec;
+  return result;
+}
+
+function Decl *
+decl_variable(Arena *p, Token *pos, Intern_String name, Typespec *typespec, Expr *expr){
+  Decl *result = decl_new(p, DECL_Variable, pos, name);
+  result->var_decl.type = typespec;
+  result->var_decl.expr = expr;
+  return result;
+}
+
+function Decl *
+decl_function(Arena *p, Token *pos, Intern_String name, Typespec *ret){
+  Decl *result = decl_new(p, DECL_Function, pos, name);
+  result->func_decl.ret = ret;
+  return result;
+}
+
+function void
+decl_func_push(Arena *p, Decl *parent, Token *pos, Intern_String name, Typespec *type){
+  assert(parent->kind == DECL_Function);
+  Decl_Function_Arg *result = arena_push_struct(p, Decl_Function_Arg);
+  result->name = name;
+  result->typespec = type;
+  result->pos = pos;
+  SLLQueuePush(parent->func_decl.first, parent->func_decl.last, result);
+}
+
+function void
+decl_enum_push(Arena *p, Decl *parent, Token *pos, Intern_String name, Expr *expr, Note *notes){
+  assert(parent->kind == DECL_Enum);
+  Decl_Enum_Child *child = arena_push_struct(p, Decl_Enum_Child);
+  child->pos = pos;
+  child->name = name;
+  child->expr = expr;
+  child->first_note = notes->first;
+  child->last_note = notes->last;
+  SLLQueuePush(parent->enum_decl.first, parent->enum_decl.last, child);
+}
+
+function void
+decl_struct_push(Decl *parent, Decl *child){
+  assert(parent->kind == DECL_Struct || parent->kind == DECL_Union);
+  SLLQueuePush(parent->struct_decl.first, parent->struct_decl.last, child);
+}
+
+function void
+decl_list_push(Decl *parent, Decl *child){
+  assert(parent->kind == DECL_List);
+  SLLQueuePush(parent->list_decl.first, parent->list_decl.last, child);
+}
+
+
+
 //-----------------------------------------------------------------------------
 // Double linked list
 //-----------------------------------------------------------------------------
 function void
-decl_list_push(Decl *l, Decl *node){
+decl_dll_list_push(Decl *l, Decl *node){
   if(l->list_decl.first == 0){
     l->list_decl.first = l->list_decl.last = node;
     node->prev = 0;
@@ -459,7 +602,7 @@ decl_list_push(Decl *l, Decl *node){
 }
 
 function void
-decl_list_push_front(Decl *l, Decl *node){
+decl_dll_list_push_front(Decl *l, Decl *node){
   if(l->list_decl.first == 0){
     l->list_decl.first = l->list_decl.last = node;
     node->prev = 0;
@@ -523,10 +666,10 @@ ast_test(){
   decls[2].kind = 2;
   decls[3].kind = 3;
   decls[4].kind = 4;
-  decl_list_push(decls, decls+1);
+  decl_dll_list_push(decls, decls+1);
-  decl_list_push(decls, decls+2);
+  decl_dll_list_push(decls, decls+2);
-  decl_list_push(decls, decls+3);
+  decl_dll_list_push(decls, decls+3);
-  decl_list_push_front(decls, decls+4);
+  decl_dll_list_push_front(decls, decls+4);
   
   //list_print(decls);
   decl_list_remove(decls, decls+1);

new_lex.c

@@ -4,6 +4,7 @@ global Intern_String keyword_cast;
 global Intern_String keyword_else;
 global Intern_String keyword_size_type;
 global Intern_String keyword_size_expr;
+global Intern_String keyword_const;
 global Intern_String keyword_typeof;
 global Intern_String keyword_while;
 global Intern_String keyword_switch;
@@ -14,6 +15,9 @@ global Intern_String keyword_union;
 global U8 *first_keyword;
 global U8 *last_keyword;
 
+global Intern_String intern_void;
+global Intern_String intern_int;
+
 function void
 init_default_keywords(Intern_Table *t){
   keyword_if = intern_string(t, lit("if"));
@@ -25,6 +29,7 @@ init_default_keywords(Intern_Table *t){
   keyword_size_type = intern_string(t, lit("size_type"));
   keyword_size_expr = intern_string(t, lit("size_expr"));
   keyword_typeof = intern_string(t, lit("typeof"));
+  keyword_const = intern_string(t, lit("const"));
   keyword_while = intern_string(t, lit("while"));
   keyword_switch = intern_string(t, lit("switch"));
   keyword_case = intern_string(t, lit("case"));
@@ -33,6 +38,9 @@ init_default_keywords(Intern_Table *t){
   
   keyword_union = intern_string(t, lit("union"));
   last_keyword = keyword_union.s.str;
+  
+  intern_void = intern_string(t, lit("void"));
+  intern_int = intern_string(t, lit("int"));
 }
 
 function B32 
@@ -489,15 +497,32 @@ lex__stream(Token_Array *array, Lex_Stream *s){
   }
 }
 
-function Token_Array
+function void
-lex_stream(Arena *arena, String stream, String file){
+lex_add_stream(Token_Array *array, String stream, String file){
   Lex_Stream s = {stream, 0, stream.str, file, 0};
+  lex__stream(array, &s);
+}
+
+function Token_Array
+lex_make_token_array(Arena *arena){
   Token_Array array = token_array_make(arena);
   init_default_keywords(&array.interns);
-  lex__stream(&array, &s);
   return array;
 }
 
+function Token_Array
+lex_stream(Arena *arena, String stream, String file){
+  Token_Array array = lex_make_token_array(arena);
+  lex_add_stream(&array, stream, file);
+  return array;
+}
+
+function void
+lex_restream(Token_Array *array, String stream, String file){
+  token_array_reset(array);
+  lex_add_stream(array, stream, file);
+}
+
 function void
 lex_test(){
   Arena *scratch = arena_begin_scratch();

new_parse.c

@@ -29,7 +29,23 @@ parser_push_error(Parser *p, Token *token, char *str, ...){
     va_end(args1);
   }
   
-  printf("Error: %s %s:%d\n", string.str, token->file.str, (S32)token->line);
+  // @Note(Krzosa): Print nice error message
+  {
+    printf("Error: %s %s:%d\n", string.str, token->file.str, (S32)token->line);
+    
+    // @Note(Krzosa): Print error line
+    {
+      int i = 0;
+      while(token->line_begin[i]!='\n' && token->line_begin[i]!=0) i++;
+      printf("%.*s\n", i, token->line_begin);
+      
+      // @Note(Krzosa): Print error marker
+      int token_i = token->str - token->line_begin;
+      for(int i = 0; i < token_i-2; i++) printf(" ");
+      printf("^^^^^^\n");
+    }
+  }
+  
   Parser_Error *error = arena_push_struct(p->arena, Parser_Error);
   error->message = string;
   error->next = 0;
@@ -48,6 +64,20 @@ token_get(Parser *p){
   return result;
 }
 
+function Token *
+token_peek(Parser *p, S64 i){
+  Token *result = token_array_iter_peek(&p->tokens, i);
+  return result;
+}
+
+function Token *
+token_peek_is(Parser *p, Token_Kind kind, S64 i){
+  Token *result = token_peek(p, i);
+  if(result->kind == kind)
+    return result;
+  return 0;
+}
+
 function Token *
 token_is(Parser *p, Token_Kind kind){
   Token *result = token_get(p);
@@ -95,6 +125,8 @@ token_expect(Parser *p, Token_Kind kind){
   return 0;
 }
 
+function Typespec *parse_typespec(Parser *p);
+function Expr *parse_expr(Parser *p);
 //-----------------------------------------------------------------------------
 // Expression parsing
 //-----------------------------------------------------------------------------
@@ -112,6 +144,9 @@ atom_expr = Int
 | 'cast' '(' typespec ',' expr ')'
 | 'size_type' '(' typespec ')'
 | 'size_expr' '(' expr ')'
+| '{' compound_expr '}'
+| '(' expr ')' 
+| '(' ':' typespec ')' '{' compound_expr '}'
 postfix_expr = atom_expr ('[' expr ']' | '.' Identifier | ++ | -- | '(' expr_list ')')*
 unary_expr = unary ? unary_expr : atom_expr
 mul_expr = atom_expr (mul atom_expr)*
@@ -120,57 +155,16 @@ logical_expr = add_expr (logical add_expr)*
 compare_expr = logical_expr (compare logical_expr)*
 ternary_expr = compare_expr ('?' ternary_expr ':' ternary_expr)?
 expr = logical_expr
+
+Compound literals
+- (:[23]*Type){}
+ - Type{}
+- { }
+
 */
-function Expr *parse_expr(Parser *p);
-
-function Expr *
-parse_expr_atom(Parser *p){
-  Token *token = 0;
-  if((token = token_match(p, TK_StringLit))){
-    Expr *result = expr_str(p->arena, token);
-    return result;
-  }
-  else if((token = token_match(p, TK_Identifier))){
-    Expr *result = expr_identifier(p->arena, token);
-    return result;
-  }
-  else if((token = token_match(p, TK_Int))){
-    Expr *result = expr_int(p->arena, token);
-    return result;
-  }
-  else if((token = token_match(p, TK_OpenParen))){
-    Expr *expr = parse_expr(p);
-    token_expect(p, TK_CloseParen);
-    Expr *result = expr_paren(p->arena, token, expr);
-    return result;
-  }
-  else if((token = token_match_keyword(p, keyword_cast))){
-    token_expect(p, TK_OpenParen);
-    token_expect(p, TK_Identifier);
-    token_expect(p, TK_Comma);
-    token_expect(p, TK_Identifier);
-    token_expect(p, TK_CloseParen);
-    return 0;
-  }
-  else{
-    parser_push_error(p, token_get(p), "Failed to parse expression");
-    return 0;
-  }
-}
-
-function B32
-token_is_postfix(Parser *p){
-  Token *token = token_get(p);
-  B32 result = token->kind == TK_OpenBracket
-    || token->kind == TK_OpenParen
-    || token->kind == TK_Dot
-    || token->kind == TK_Increment
-    || token->kind == TK_Decrement;
-  return result;
-}
 
 function Expr_Compound_Field *
-parse_expr_compound(Parser *p){
+parse_expr_compound_field(Parser *p){
   Token *token = token_get(p);
   Expr_Compound_Field *result = 0;
   if(token_match(p, TK_OpenBracket)){
@@ -196,6 +190,81 @@ parse_expr_compound(Parser *p){
   return result;
 }
 
+function Expr *
+parse_expr_compound(Parser *p, Typespec *typespec){
+  Token *token = token_expect(p, TK_OpenBrace);
+  Expr *expr = expr_compound(p->arena, token, typespec);
+  while(!token_is(p, TK_CloseBrace)){
+    Expr_Compound_Field *field = parse_expr_compound_field(p);
+    expr_compound_push(expr, field);
+    if(!token_match(p, TK_Comma)){
+      break;
+    }
+  }
+  token_expect(p, TK_CloseBrace);
+  return expr;
+}
+
+function Expr *
+parse_expr_atom(Parser *p){
+  Expr *result = 0;
+  Token *token = token_get(p);
+  if(token_match(p, TK_StringLit)){
+    result = expr_str(p->arena, token);
+  }
+  else if(token_match(p, TK_Identifier)){
+    if(token_is(p, TK_OpenBrace)){
+      Typespec *typespec = typespec_name(p->arena, token, token->intern_val);
+      result = parse_expr_compound(p, typespec);
+    }
+    else{
+      result = expr_identifier(p->arena, token);
+    }
+  }
+  else if(token_match(p, TK_Int)){
+    result = expr_int(p->arena, token);
+  }
+  else if(token_is(p, TK_OpenBrace)){
+    result = parse_expr_compound(p, 0);
+  }
+  
+  else if(token_match(p, TK_OpenParen)){
+    if(token_match(p, TK_Colon)){
+      Typespec *typespec = parse_typespec(p);
+      token_expect(p, TK_CloseParen);
+      result = parse_expr_compound(p, typespec);
+    }
+    else{
+      Expr *expr = parse_expr(p);
+      token_expect(p, TK_CloseParen);
+      result = expr_paren(p->arena, token, expr);
+    }
+  }
+  else if(token_match_keyword(p, keyword_cast)){
+    token_expect(p, TK_OpenParen);
+    Typespec *typespec = parse_typespec(p);
+    token_expect(p, TK_Comma);
+    Expr *expr = parse_expr(p);
+    token_expect(p, TK_CloseParen);
+    result = expr_cast(p->arena, token, typespec, expr);
+  }
+  else{
+    parser_push_error(p, token, "Failed to parse expression");
+  }
+  return result;
+}
+
+function B32
+token_is_postfix(Parser *p){
+  Token *token = token_get(p);
+  B32 result = token->kind == TK_OpenBracket
+    || token->kind == TK_OpenParen
+    || token->kind == TK_Dot
+    || token->kind == TK_Increment
+    || token->kind == TK_Decrement;
+  return result;
+}
+
 function Expr_Compound_Field *
 parse_expr_function_argument(Parser *p){
   Token *token = token_get(p);
@@ -365,10 +434,171 @@ parse_expr(Parser *p){
   return parse_expr_ternary(p);
 }
 
+//-----------------------------------------------------------------------------
+// Type specifier parsing
+//-----------------------------------------------------------------------------
+/*
+ base_type = NAME 
+| '(' type_list? ')' type?
+
+type = ('*' | '[' expr ']')* base_type
+
+Examples: 
+[32]*U32 - Array of 32 pointers to U32
+**CustomDataType - Pointer to pointer of CustomDataType
+(*U32, S64) **S64 - Function pointer 
+(CoolType: optional, S32) - Implicit void return value
+
+*/
+function Typespec *
+parse_typespec_function(Parser *p, Token *token){
+  Typespec *result = typespec_function(p->arena, token, 0);
+  if(!token_is(p, TK_CloseParen)) 
+    for(;;) {
+    
+    // Optional name
+    Token *name = 0;
+    if((token = token_is(p, TK_Identifier))){
+      if(token_peek_is(p, TK_Colon, 1)){
+        token_next(p);
+        token_next(p);
+        name = token;
+      }
+    }
+    
+    // Parse type
+    Typespec *arg = parse_typespec(p);
+    if(name) 
+      arg = typespec_named_argument(p->arena, name, arg, name->intern_val);
+    typespec_function_push(result, arg);
+    
+    if(!token_match(p, TK_Comma)){
+      break;
+    }
+  }
+  token_expect(p, TK_CloseParen);
+  if(token_is(p, TK_Identifier) 
+     || token_is(p, TK_OpenParen)
+     || token_is(p, TK_Mul)
+     || token_is(p, TK_OpenBracket))
+    result->func.ret = parse_typespec(p);
+  else
+    result->func.ret = typespec_name(p->arena, token_get(p), intern_void);
+  
+  return result;
+}
+
+// [10]*int - Array of 10 pointers to ints
+function Typespec *
+parse_typespec_recurse(Parser *p){
+  Token *token = token_get(p);
+  if(token_match(p, TK_Mul)){
+    Typespec *result = parse_typespec_recurse(p);
+    result = typespec_pointer(p->arena, token, result);
+    return result;
+  }
+  else if(token_match(p, TK_OpenBracket)){
+    Expr *expr = parse_expr(p);
+    token_expect(p, TK_CloseBracket);
+    Typespec *result = parse_typespec_recurse(p);
+    result = typespec_array(p->arena, token, result, expr);
+    return result;
+  }
+  else if(token_match(p, TK_OpenParen)){
+    Typespec *result = parse_typespec_function(p, token);
+    return result;
+  }
+  else if(token_match(p, TK_Identifier)){
+    Typespec *result = typespec_name(p->arena, token, token->intern_val);
+    return result;
+  }
+  else{
+    parser_push_error(p, token, "Failed to parse type, unexpected token");
+    return 0;
+  }
+}
+
+function Typespec *
+parse_typespec(Parser *p){
+  Typespec *result = parse_typespec_recurse(p);
+  return result;
+}
+
+//-----------------------------------------------------------------------------
+// Parsing decls
+//-----------------------------------------------------------------------------
+/*
+name::(param:U32)*U32{}
+name::struct{}
+name::union{}
+name::enum{}
+
+name::typedef = name2;
+name::const   = 4254;
+
+*/
+function Decl *
+parse_enum(Parser *p, Token *name){
+  Typespec *typespec = 0;
+  if(token_match(p, TK_Colon)){
+    typespec = parse_typespec(p);
+  }
+  else{
+    typespec = typespec_name(p->arena, token_get(p), intern_int);
+  }
+  
+  Decl *result = decl_enum(p->arena, name, name->intern_val, typespec);
+  token_expect(p, TK_OpenBrace);
+  do{
+    Token *val = token_expect(p, TK_Identifier);
+    Expr *expr = 0;
+    if(token_match(p, TK_Assign)){
+      expr = parse_expr(p);
+    }
+    decl_enum_push(p->arena, result, val, val->intern_val, expr, 0);
+  } while(token_is(p, TK_Comma));
+  token_expect(p, TK_CloseBrace);
+  return result;
+}
+
+function Decl *
+parse_decl(Parser *p){
+  Decl *result = 0;
+  Token *name = 0;
+  if((name = token_match(p, TK_Identifier))){
+    if(token_match(p, TK_DoubleColon)){
+      Token *token = 0;
+      if((token = token_match_keyword(p, keyword_enum))){
+        result = parse_enum(p, name);
+      }
+      else if((token = token_match_keyword(p, keyword_union))){
+        // Union
+      }
+      else if((token = token_match_keyword(p, keyword_struct))){
+        // Struct
+      }
+      else if((token = token_match_keyword(p, keyword_const))){
+        // Const value
+      }
+      else if((token = token_match(p, TK_OpenParen))){
+        // Function
+      }
+      else{
+        parser_push_error(p, token_get(p), "Expected token of kind todo:decl_tokens");
+      }
+    }
+    else{
+      parser_push_error(p, token_get(p), "Expected token of kind '::'");
+    }
+  }
+  return result;
+}
+
 //-----------------------------------------------------------------------------
 // Test code
 //-----------------------------------------------------------------------------
 function void expr_print(Expr *expr);
+function B32 typespec_print(Typespec *spec);
 function void
 token_print(Token *token){
   printf("%.*s", (S32)token->len, token->str);
@@ -408,7 +638,11 @@ expr_print(Expr *expr){
     }break;
     
     case EK_Compound:{
-      // typespec_print(p);
+      if(expr->compound.typespec){
+        printf("(");
+        typespec_print(expr->compound.typespec);
+        printf(")");
+      }
       printf("{");
       for(Expr_Compound_Field *n = expr->compound.first; n; n=n->next){
         expr_compound_print(n);
@@ -468,7 +702,7 @@ expr_print(Expr *expr){
     case EK_Cast:{
       printf("(");
       printf("(");
-      //print_typespec(expr->cast.type);
+      typespec_print(expr->cast.typespec);
       printf(")");
       expr_print(expr->cast.expr);
       printf(")");
@@ -494,6 +728,46 @@ expr_print(Expr *expr){
   }
 }
 
+function B32
+typespec_print(Typespec *spec){
+  switch(spec->kind) {
+    case TS_Name: {
+      printf("%s", spec->name.s.str);
+    } break;
+    
+    case TS_NamedArgument: {
+      printf("%s: ", spec->named.name.s.str);
+      typespec_print(spec->named.base);
+    }break;
+    
+    case TS_Pointer: {
+      typespec_print(spec->base);
+      printf("*");
+    } break;
+    
+    case TS_Array: {
+      typespec_print(spec->arr.base);
+      printf("[");
+      expr_print(spec->arr.size);
+      printf("]");
+    } break;
+    
+    case TS_Function: {
+      printf("(");
+      for(Typespec *n = spec->func.first; n; n=n->next){
+        typespec_print(n);
+        if(n!=spec->func.last) 
+          printf(", ");
+      }
+      
+      printf(")");
+      typespec_print(spec->func.ret);
+    } break;
+    default: {invalid_codepath;} break;
+  }
+  return true;
+}
+
 
 function S64
 eval_expr(Expr *expr){
@@ -545,8 +819,34 @@ eval_expr(Expr *expr){
   return 0;
 }
 
+function Parser
+parser_make(Arena *arena){
+  Parser result = {
+    .tokens = lex_make_token_array(arena),
+    .arena = arena,
+  };
+  return result;
+}
+
 function void
-parse_test(){
+parser_restream(Parser *p, String stream, String file){
+  lex_restream(&p->tokens, stream, file);
+}
+
+function Parser
+parser_make_stream(Arena *arena, String stream, String file){
+  Parser parser = parser_make(arena);
+  lex_restream(&parser.tokens, stream, file);
+  return parser;
+}
+
+function void
+parser_add_stream(Parser *p, String string, String file){
+  lex_add_stream(&p->tokens, string, file);
+}
+
+function void
+parse_test_expr(){
   Arena *scratch = arena_begin_scratch();
   String test_case = lit("32+52-242*2/424%5-23"
                          " 1<<5>>6<<2 "
@@ -558,12 +858,9 @@ parse_test(){
                          " 1>5 ? 1 : 2 "
                          " !!!!!1 "
                          " ~~1 + -!2 "
-                         " 1 + ++Thing[12]++ + ++Thing[12].expr + --Not_Thing[156](Thing) + test_func(asd=func1, af=func2, gg=func3)"
+                         " 1 + ++Thing[12]++ + ++Thing[12].expr +" 
                          );
-  Parser parser = {
+  Parser parser = parser_make_stream(scratch, test_case, lit("Big_Expr"));
-    .tokens = lex_stream(scratch, test_case, lit("expr_test")),
-    .arena = scratch,
-  };
   Parser *p = &parser;
   
   S64 t = 5;
@@ -585,10 +882,33 @@ parse_test(){
     assert(val == test_val[i]);
   }
   
-  Expr *expr = parse_expr(p);
+  String exprs[] = {
-  expr_print(expr);
+    lit("cast([12](thing: U32, qwe: *U32) [32]Result, (123+234))"),
+    lit("cast((thing: U32, qwe: *U32), (123+234))"),
+    lit("(:(U32,U32)){Thing=10}"),
+    lit("--Not_Thing[156](Thing) + test_func(asd=func1, af=func2, gg=func3)"),
+    lit("(:[23]*Type){Thing=10}"),
+    lit("cast(**Data,{Thing=10})"),
+    lit("(:[64]S64){1,2,3,4,5}"),
+    lit("Data_Type{1,2,3,4,5}"),
+  };
+  for(SizeU i = 0; i < buff_cap(exprs); i++){
+    parser_restream(p, exprs[i], lit("Test_Exprs"));
+    Expr *expr = parse_expr(p);
+    expr_print(expr);
+    printf("\n");
+  }
   
   arena_end_scratch();
 }
 
+function void
+parse_test_decls(){
   
+}
+
+function void
+parse_test(){
+  parse_test_expr();
+  parse_test_decls();
+}

token_array.c

@@ -96,6 +96,19 @@ token_array_iter_peek(Token_Array *array, S64 i){
   return result;
 }
 
+function void
+token_array_reset(Token_Array *array){
+  // @Todo(Krzosa): Add free list
+  assert(&array->first == array->last);
+  array->len = 0;
+  array->block = 0;
+  array->last = &array->first;
+  array->last->next = 0;
+  array->iter_bucket = array->last;
+  array->iter_len = 0;
+  array->iter_block = 0;
+}
+
 function Token *
 token_array_iter_begin(Token_Array *array){
   array->iter_len = 0;