corelang/ast.h

typedef struct Decl_Enum_Child Decl_Enum_Child;
typedef struct Typespec Typespec;
typedef struct Decl Decl;
typedef struct Note Note;

//-----------------------------------------------------------------------------
// Type specifier
//-----------------------------------------------------------------------------
typedef enum Typespec_Kind{
  TS_None,
  TS_Name,
  TS_Pointer,
  TS_Array,
  TS_Function,
  TS_Struct,
}Typespec_Kind;

struct Typespec{
  Typespec_Kind kind;
  Typespec *next;
  Token *pos;
  union{
    Intern_String name;
    Decl *struct_spec;
    struct{
      Typespec *first;
      Typespec *last;
      Typespec *ret;
    }function_spec;
    struct{
      Typespec *base;
      Expr *size;
    }array_spec;
    Typespec *base;
  };
};

//-----------------------------------------------------------------------------
// Notes
//-----------------------------------------------------------------------------
struct Note{
  Token *pos;
  Intern_String name;
  Expr *expr;
  
  Note *next;
  Note *first;
  Note *last;
};

//-----------------------------------------------------------------------------
// Declarations
//-----------------------------------------------------------------------------
typedef enum Decl_Kind{
  DECL_None,
  DECL_Struct,
  DECL_Union,
  DECL_Enum,
  DECL_Variable,
  DECL_Typedef,
  DECL_List,
}Decl_Kind;

struct Decl_Enum_Child{
  Decl_Enum_Child *next;
  Intern_String name;
  Token *pos;
  Expr *expr;
  
  Note *first_note;
  Note *last_note;
};

struct Decl{
  Decl_Kind kind;
  Intern_String name;
  Token *pos;
  Decl *next;
  
  Note *first_note;
  Note *last_note;
  
  union{
    struct{
      Decl_Enum_Child *first;
      Decl_Enum_Child *last;
      Typespec *typespec;
    }enum_decl;
    struct{
      Decl *first;
      Decl *last;
    } struct_decl;
    struct{
      Typespec *type;
      Expr *expr;
    }variable_decl;
    struct{
      Typespec *type;
    }typedef_decl;
    struct{
      Decl *first;
      Decl *last;
    }list;
  };
};