rewrite of attribute handling
[cparser] / ast_t.h
diff --git a/ast_t.h b/ast_t.h
index 342d546..7a08c2a 100644 (file)
--- a/ast_t.h
+++ b/ast_t.h
@@ -1,3 +1,22 @@
+/*
+ * This file is part of cparser.
+ * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
 #ifndef AST_T_H
 #define AST_T_H
 
 #include "symbol.h"
 #include "token_t.h"
 #include "type.h"
+#include "entity_t.h"
 #include "adt/obst.h"
 
+/** The AST obstack contains all data that must stay in the AST. */
 extern struct obstack ast_obstack;
 
-typedef enum {
+/**
+ * Operator precedence classes
+ */
+typedef enum precedence_t {
+       PREC_BOTTOM,
+       PREC_EXPRESSION,     /* ,                                  left to right */
+       PREC_ASSIGNMENT,     /* = += -= *= /= %= <<= >>= &= ^= |=  right to left */
+       PREC_CONDITIONAL,    /* ?:                                 right to left */
+       PREC_LOGICAL_OR,     /* ||                                 left to right */
+       PREC_LOGICAL_AND,    /* &&                                 left to right */
+       PREC_OR,             /* |                                  left to right */
+       PREC_XOR,            /* ^                                  left to right */
+       PREC_AND,            /* &                                  left to right */
+       PREC_EQUALITY,       /* == !=                              left to right */
+       PREC_RELATIONAL,     /* < <= > >=                          left to right */
+       PREC_SHIFT,          /* << >>                              left to right */
+       PREC_ADDITIVE,       /* + -                                left to right */
+       PREC_MULTIPLICATIVE, /* * / %                              left to right */
+       PREC_CAST,           /* (type)                             right to left */
+       PREC_UNARY,          /* ! ~ ++ -- + - * & sizeof           right to left */
+       PREC_POSTFIX,        /* () [] -> .                         left to right */
+       PREC_PRIMARY,
+       PREC_TOP
+} precedence_t;
+
+/**
+ * Expression kinds.
+ */
+typedef enum expression_kind_t {
        EXPR_UNKNOWN = 0,
        EXPR_INVALID,
        EXPR_REFERENCE,
+       EXPR_REFERENCE_ENUM_VALUE,
        EXPR_CONST,
+       EXPR_CHARACTER_CONSTANT,
+       EXPR_WIDE_CHARACTER_CONSTANT,
        EXPR_STRING_LITERAL,
        EXPR_WIDE_STRING_LITERAL,
+       EXPR_COMPOUND_LITERAL,
        EXPR_CALL,
        EXPR_CONDITIONAL,
        EXPR_SELECT,
        EXPR_ARRAY_ACCESS,
        EXPR_SIZEOF,
        EXPR_CLASSIFY_TYPE,
+       EXPR_ALIGNOF,
 
-       EXPR_FUNCTION,
-       EXPR_PRETTY_FUNCTION,
-       EXPR_BUILTIN_SYMBOL,
+       EXPR_FUNCNAME,
+       EXPR_BUILTIN_CONSTANT_P,
+       EXPR_BUILTIN_TYPES_COMPATIBLE_P,
        EXPR_OFFSETOF,
        EXPR_VA_START,
        EXPR_VA_ARG,
+       EXPR_VA_COPY,
        EXPR_STATEMENT,
+       EXPR_LABEL_ADDRESS, /**< GCC extension &&label operator */
 
        EXPR_UNARY_FIRST,
        EXPR_UNARY_NEGATE = EXPR_UNARY_FIRST,
@@ -46,8 +102,12 @@ typedef enum {
        EXPR_UNARY_PREFIX_INCREMENT,
        EXPR_UNARY_PREFIX_DECREMENT,
        EXPR_UNARY_CAST,
-       EXPR_UNARY_CAST_IMPLICIT, /* compiler generated cast */
-       EXPR_UNARY_LAST = EXPR_UNARY_CAST_IMPLICIT,
+       EXPR_UNARY_CAST_IMPLICIT, /**< compiler generated cast */
+       EXPR_UNARY_ASSUME,        /**< MS __assume() */
+       EXPR_UNARY_DELETE,
+       EXPR_UNARY_DELETE_ARRAY,
+       EXPR_UNARY_THROW,
+       EXPR_UNARY_LAST = EXPR_UNARY_THROW,
 
        EXPR_BINARY_FIRST,
        EXPR_BINARY_ADD = EXPR_BINARY_FIRST,
@@ -88,7 +148,14 @@ typedef enum {
        EXPR_BINARY_ISLESSGREATER,
        EXPR_BINARY_ISUNORDERED,
        EXPR_BINARY_LAST = EXPR_BINARY_ISUNORDERED,
-} expression_type_t;
+} expression_kind_t;
+
+typedef enum funcname_kind_t {
+       FUNCNAME_FUNCTION,           /**< C99 __func__, older __FUNCTION__ */
+       FUNCNAME_PRETTY_FUNCTION,    /**< GNUC __PRETTY_FUNCTION__ */
+       FUNCNAME_FUNCSIG,            /**< MS __FUNCSIG__ */
+       FUNCNAME_FUNCDNAME           /**< MS __FUNCDNAME__ */
+} funcname_kind_t;
 
 /* convenience macros */
 #define EXPR_BINARY_CASES                  \
@@ -129,7 +196,10 @@ typedef enum {
        case EXPR_BINARY_ISLESSGREATER:        \
        case EXPR_BINARY_ISUNORDERED:
 
-#define EXPR_UNARY_CASES                   \
+/**
+ * unary expression with mandatory operand
+ */
+#define EXPR_UNARY_CASES_MANDATORY         \
        case EXPR_UNARY_NEGATE:                \
        case EXPR_UNARY_PLUS:                  \
        case EXPR_UNARY_BITWISE_NEGATE:        \
@@ -141,247 +211,266 @@ typedef enum {
        case EXPR_UNARY_PREFIX_INCREMENT:      \
        case EXPR_UNARY_PREFIX_DECREMENT:      \
        case EXPR_UNARY_CAST:                  \
-       case EXPR_UNARY_CAST_IMPLICIT:
-
-struct context_t {
-       declaration_t *declarations;
-};
-
+       case EXPR_UNARY_CAST_IMPLICIT:         \
+       case EXPR_UNARY_ASSUME:                \
+       case EXPR_UNARY_DELETE:                \
+       case EXPR_UNARY_DELETE_ARRAY:
+
+/**
+ * unary expression with optional operand
+ */
+#define EXPR_UNARY_CASES_OPTIONAL \
+       case EXPR_UNARY_THROW:        \
+
+#define EXPR_UNARY_CASES       \
+       EXPR_UNARY_CASES_MANDATORY \
+       EXPR_UNARY_CASES_OPTIONAL
+
+/**
+ * The base class of every expression.
+ */
 struct expression_base_t {
-       expression_type_t   type;
-       type_t             *datatype;
-       source_position_t   source_position;
+       expression_kind_t   kind;            /**< The expression kind. */
+       type_t             *type;            /**< The type of the expression. */
+       source_position_t   source_position; /**< The source position of this expression. */
+       bool                parenthesized;
+#ifndef NDEBUG
+       bool                transformed;     /**< Set if this expression was transformed. */
+#endif
 };
 
+/**
+ * A constant.
+ */
 struct const_expression_t {
-       expression_base_t  expression;
+       expression_base_t  base;
        union {
-               long long   int_value;
-               long double float_value;
+               long long      int_value;
+               long double    float_value;
+               string_t       character;
+               wide_string_t  wide_character;
        } v;
+       bool               is_ms_noop;  /**< True, if this constant is the result
+                                            of an microsoft __noop operator */
 };
 
 struct string_literal_expression_t {
-       expression_base_t  expression;
-       const char        *value;
+       expression_base_t  base;
+       string_t           value;
+};
+
+struct funcname_expression_t {
+       expression_base_t  base;
+       funcname_kind_t    kind;
+       string_t           value;     /**< the value once assigned. */
 };
 
 struct wide_string_literal_expression_t {
-       expression_base_t  expression;
+       expression_base_t  base;
        wide_string_t      value;
 };
 
-struct builtin_symbol_expression_t {
-       expression_base_t  expression;
-       symbol_t          *symbol;
+struct compound_literal_expression_t {
+       expression_base_t  base;
+       type_t            *type;
+       initializer_t     *initializer;
+};
+
+struct builtin_constant_expression_t {
+       expression_base_t  base;
+       expression_t      *value;
+};
+
+struct builtin_types_compatible_expression_t {
+       expression_base_t  base;
+       type_t            *left;
+       type_t            *right;
 };
 
 struct reference_expression_t {
-       expression_base_t  expression;
-       symbol_t          *symbol;
-       declaration_t     *declaration;
+       expression_base_t  base;
+       entity_t          *entity;
 };
 
+/**
+ * An argument of a call.
+ */
 struct call_argument_t {
-       expression_t    *expression;
-       call_argument_t *next;
+       expression_t    *expression;  /**< The expression which value is transmitted. */
+       call_argument_t *next;        /**< Links to the next argument of this call. */
 };
 
+
 struct call_expression_t {
-       expression_base_t  expression;
-       expression_t      *function;
-       call_argument_t   *arguments;
+       expression_base_t  base;
+       expression_t      *function;  /**< The address of the function to call. */
+       call_argument_t   *arguments; /**< List of arguments of this call. */
 };
 
+
 struct unary_expression_t {
-       expression_base_t  expression;
-       expression_t      *value;
+       expression_base_t  base;
+       expression_t      *value;     /**< The unary operand. */
 };
 
 struct binary_expression_t {
-       expression_base_t  expression;
+       expression_base_t  base;
        expression_t      *left;
        expression_t      *right;
 };
 
 struct select_expression_t {
-       expression_base_t  expression;
+       expression_base_t  base;
        expression_t      *compound;
-       symbol_t          *symbol;
-
-       declaration_t     *compound_entry;
+       entity_t          *compound_entry;
 };
 
 struct array_access_expression_t {
-       expression_base_t  expression;
-       expression_t      *array_ref;
-       expression_t      *index;
-       bool               flipped; /* index/ref was written in a 5[a] way */
+       expression_base_t  base;
+       expression_t      *array_ref; /**< the referenced array */
+       expression_t      *index;     /**< the index used */
+       bool               flipped;   /**< True if index/ref was written in a 5[a] way */
 };
 
-struct sizeof_expression_t {
-       expression_base_t  expression;
+struct typeprop_expression_t {
+       expression_base_t  base;
        type_t            *type;
-       expression_t      *size_expression;
+       expression_t      *tp_expression;
 };
 
 struct designator_t {
-       symbol_t     *symbol;
-       expression_t *array_access;
-       designator_t *next;
+       source_position_t  source_position;
+       symbol_t          *symbol;      /**< the symbol if any */
+       expression_t      *array_index; /**< the array index if any */
+       designator_t      *next;
 };
 
 struct offsetof_expression_t {
-       expression_base_t  expression;
+       expression_base_t  base;
        type_t            *type;
        designator_t      *designator;
 };
 
 struct va_start_expression_t {
-       expression_base_t  expression;
+       expression_base_t  base;
        expression_t      *ap;
-       declaration_t     *parameter;
+       variable_t        *parameter;
 };
 
 struct va_arg_expression_t {
-       expression_base_t  expression;
+       expression_base_t  base;
        expression_t      *ap;
 };
 
+struct va_copy_expression_t {
+       expression_base_t  base;
+       expression_t      *dst;    /**< destination argument */
+       expression_t      *src;    /**< source argument */
+};
+
 struct conditional_expression_t {
-       expression_base_t  expression;
+       expression_base_t  base;
        expression_t      *condition;
        expression_t      *true_expression;
        expression_t      *false_expression;
 };
 
 struct statement_expression_t {
-       expression_base_t  expression;
+       expression_base_t  base;
        statement_t       *statement;
 };
 
 struct classify_type_expression_t {
-       expression_base_t  expression;
+       expression_base_t  base;
        expression_t      *type_expression;
 };
 
+struct label_address_expression_t {
+       expression_base_t  base;
+       label_t           *label;
+};
+
 union expression_t {
-       expression_type_t                type;
-       expression_base_t                base;
-       const_expression_t               conste;
-       string_literal_expression_t      string;
-       wide_string_literal_expression_t wide_string;
-       builtin_symbol_expression_t      builtin_symbol;
-       reference_expression_t           reference;
-       call_expression_t                call;
-       unary_expression_t               unary;
-       binary_expression_t              binary;
-       select_expression_t              select;
-       array_access_expression_t        array_access;
-       sizeof_expression_t              sizeofe;
-       offsetof_expression_t            offsetofe;
-       va_start_expression_t            va_starte;
-       va_arg_expression_t              va_arge;
-       conditional_expression_t         conditional;
-       statement_expression_t           statement;
-       classify_type_expression_t       classify_type;
-};
-
-typedef enum {
-       STORAGE_CLASS_NONE,
-       STORAGE_CLASS_TYPEDEF,
-       STORAGE_CLASS_EXTERN,
-       STORAGE_CLASS_STATIC,
-       STORAGE_CLASS_AUTO,
-       STORAGE_CLASS_REGISTER,
-       STORAGE_CLASS_ENUM_ENTRY,
-       STORAGE_CLASS_THREAD,
-       STORAGE_CLASS_THREAD_EXTERN,
-       STORAGE_CLASS_THREAD_STATIC
-} storage_class_tag_t;
-
-typedef enum {
-       NAMESPACE_NORMAL,
-       NAMESPACE_STRUCT,
-       NAMESPACE_UNION,
-       NAMESPACE_ENUM,
-       NAMESPACE_LABEL,
-} namespace_t;
-
-typedef enum {
+       expression_kind_t                     kind;
+       expression_base_t                     base;
+       const_expression_t                    conste;
+       funcname_expression_t                 funcname;
+       string_literal_expression_t           string;
+       wide_string_literal_expression_t      wide_string;
+       compound_literal_expression_t         compound_literal;
+       builtin_constant_expression_t         builtin_constant;
+       builtin_types_compatible_expression_t builtin_types_compatible;
+       reference_expression_t                reference;
+       call_expression_t                     call;
+       unary_expression_t                    unary;
+       binary_expression_t                   binary;
+       select_expression_t                   select;
+       array_access_expression_t             array_access;
+       typeprop_expression_t                 typeprop;
+       offsetof_expression_t                 offsetofe;
+       va_start_expression_t                 va_starte;
+       va_arg_expression_t                   va_arge;
+       va_copy_expression_t                  va_copye;
+       conditional_expression_t              conditional;
+       statement_expression_t                statement;
+       classify_type_expression_t            classify_type;
+       label_address_expression_t            label_address;
+};
+
+typedef enum initializer_kind_t {
        INITIALIZER_VALUE,
        INITIALIZER_LIST,
        INITIALIZER_STRING,
-       INITIALIZER_WIDE_STRING
-} initializer_type_t;
+       INITIALIZER_WIDE_STRING,
+       INITIALIZER_DESIGNATOR
+} initializer_kind_t;
 
 struct initializer_base_t {
-       initializer_type_t type;
+       initializer_kind_t kind;
 };
 
 struct initializer_value_t {
-       initializer_base_t  initializer;
+       initializer_base_t  base;
        expression_t       *value;
 };
 
 struct initializer_list_t {
-       initializer_base_t  initializer;
+       initializer_base_t  base;
        size_t              len;
        initializer_t      *initializers[];
 };
 
 struct initializer_string_t {
-       initializer_base_t  initializer;
-       const char         *string;
+       initializer_base_t base;
+       string_t           string;
 };
 
 struct initializer_wide_string_t {
-       initializer_base_t  initializer;
+       initializer_base_t  base;
        wide_string_t       string;
 };
 
+struct initializer_designator_t {
+       initializer_base_t  base;
+       designator_t       *designator;
+};
+
 union initializer_t {
-       initializer_type_t        type;
+       initializer_kind_t        kind;
        initializer_base_t        base;
        initializer_value_t       value;
        initializer_list_t        list;
        initializer_string_t      string;
        initializer_wide_string_t wide_string;
+       initializer_designator_t  designator;
 };
 
-struct declaration_t {
-       unsigned char       namespc;
-       unsigned char       storage_class;
-       unsigned int        address_taken : 1;
-       unsigned int        is_inline     : 1;
-       type_t             *type;
-       symbol_t           *symbol;
-       source_position_t   source_position;
-       union {
-               bool            is_defined;
-               statement_t    *statement;
-               initializer_t  *initializer;
-               expression_t   *enum_value;
-       } init;
-       context_t           context;
-       context_t          *parent_context;
-
-       /** next declaration in a context */
-       declaration_t      *next;
-       /** next declaration with same symbol */
-       declaration_t      *symbol_next;
-
-       unsigned char       declaration_type; /* used in ast2firm module */
-       union {
-               unsigned int    value_number;     /* used in ast2firm module */
-               ir_entity      *entity;           /* used in ast2firm module */
-               ir_node        *block;            /* used in ast2firm module */
-               tarval         *enum_val;         /* used in ast2firm module */
-       } v;
-};
-
-typedef enum {
+/**
+ * The statement kinds.
+ */
+typedef enum statement_kind_t {
        STATEMENT_INVALID,
+       STATEMENT_EMPTY,
        STATEMENT_COMPOUND,
        STATEMENT_RETURN,
        STATEMENT_DECLARATION,
@@ -396,111 +485,155 @@ typedef enum {
        STATEMENT_WHILE,
        STATEMENT_DO_WHILE,
        STATEMENT_FOR,
-       STATEMENT_ASM
-} statement_type_t;
-
+       STATEMENT_ASM,
+       STATEMENT_MS_TRY,          /**< MS __try/__finally or __try/__except */
+       STATEMENT_LEAVE            /**< MS __leave */
+} statement_kind_t;
+
+/**
+ * The base class of every statement.
+ */
 struct statement_base_t {
-       statement_type_t   type;
-       statement_t       *next;
+       statement_kind_t   kind;
+       statement_t       *next;         /**< Point to the next statement in a compound statement. */
        source_position_t  source_position;
+       statement_t       *parent;       /**< The Parent statement that controls the execution. */
+       bool               reachable;    /**< True, if this statement is reachable. */
+#ifndef NDEBUG
+       bool               transformed;
+#endif
+};
+
+struct invalid_statement_t {
+       statement_base_t  base;
+};
+
+struct empty_statement_t {
+       statement_base_t  base;
 };
 
 struct return_statement_t {
-       statement_base_t  statement;
-       expression_t     *return_value;
+       statement_base_t  base;
+       expression_t     *value;    /**< The return value if any. */
 };
 
 struct compound_statement_t {
-       statement_base_t  statement;
+       statement_base_t  base;
        statement_t      *statements;
-       context_t         context;
+       scope_t           scope;
+       bool              stmt_expr; /**< True if this compound statement is a statement expression. */
 };
 
 struct declaration_statement_t {
-       statement_base_t  statement;
-       declaration_t    *declarations_begin;
-       declaration_t    *declarations_end;
+       statement_base_t  base;
+       entity_t         *declarations_begin;
+       entity_t         *declarations_end;
 };
 
 struct if_statement_t {
-       statement_base_t  statement;
+       statement_base_t  base;
        expression_t     *condition;
        statement_t      *true_statement;
        statement_t      *false_statement;
 };
 
 struct switch_statement_t {
-       statement_base_t  statement;
-       expression_t     *expression;
-       statement_t      *body;
+       statement_base_t        base;
+       expression_t           *expression;
+       statement_t            *body;
+       case_label_statement_t *first_case, *last_case;  /**< List of all cases, including default. */
+       case_label_statement_t *default_label;           /**< The default label if existent. */
+       unsigned long           default_proj_nr;         /**< The Proj-number for the default Proj. */
 };
 
 struct goto_statement_t {
-       statement_base_t  statement;
-       declaration_t    *label;
+       statement_base_t  base;
+       label_t          *label;         /**< The destination label. */
+       expression_t     *expression;    /**< The expression for an assigned goto. */
+       goto_statement_t *next;          /**< links all goto statements of a function */
 };
 
 struct case_label_statement_t {
-       statement_base_t  statement;
-       expression_t     *expression;
-       statement_t      *label_statement;
+       statement_base_t        base;
+       expression_t           *expression;    /**< The case label expression, NULL for default label. */
+       expression_t           *end_range;     /**< For GNUC case a .. b: the end range expression, NULL else. */
+       case_label_statement_t *next;          /**< link to the next case label in switch */
+       statement_t            *statement;
+       long                   first_case;     /**< The folded value of expression. */
+       long                   last_case;      /**< The folded value of end_range. */
+       bool                   is_bad;         /**< If set marked as bad to suppress warnings. */
+       bool                   is_empty_range; /**< If set marked this as an empty range. */
 };
 
 struct label_statement_t {
-       statement_base_t  statement;
-       declaration_t    *label;
-       statement_t      *label_statement;
+       statement_base_t   base;
+       label_t           *label;
+       statement_t       *statement;
+       label_statement_t *next;    /**< links all label statements of a function */
 };
 
 struct expression_statement_t {
-       statement_base_t  statement;
+       statement_base_t  base;
        expression_t     *expression;
 };
 
 struct while_statement_t {
-       statement_base_t  statement;
+       statement_base_t  base;
        expression_t     *condition;
        statement_t      *body;
 };
 
 struct do_while_statement_t {
-       statement_base_t  statement;
+       statement_base_t  base;
        expression_t     *condition;
        statement_t      *body;
 };
 
 struct for_statement_t {
-       statement_base_t  statement;
+       statement_base_t  base;
        expression_t     *initialisation;
        expression_t     *condition;
        expression_t     *step;
        statement_t      *body;
-       context_t         context;
+       scope_t           scope;
+       bool              condition_reachable:1;
+       bool              step_reachable:1;
 };
 
-struct asm_constraint_t {
-       const char       *constraints;
-       expression_t     *expression;
-       symbol_t         *symbol;
-       asm_constraint_t *next;
+struct asm_argument_t {
+       string_t        constraints;
+       expression_t   *expression;
+       symbol_t       *symbol;
+       asm_argument_t *next;
 };
 
 struct asm_clobber_t {
-       const char    *clobber;
+       string_t       clobber;
        asm_clobber_t *next;
 };
 
 struct asm_statement_t {
-       statement_base_t  statement;
-       const char       *asm_text;
-       asm_constraint_t *inputs;
-       asm_constraint_t *outputs;
-       asm_clobber_t    *clobbers;
-       bool              is_volatile;
+       statement_base_t base;
+       string_t         asm_text;
+       asm_argument_t  *inputs;
+       asm_argument_t  *outputs;
+       asm_clobber_t   *clobbers;
+       bool             is_volatile;
+};
+
+struct ms_try_statement_t {
+       statement_base_t  base;
+       statement_t      *try_statement;
+       expression_t     *except_expression; /**< non-null for except, NULL for finally */
+       statement_t      *final_statement;
+};
+
+struct leave_statement_t {
+       statement_base_t  base;
 };
 
 union statement_t {
-       statement_type_t         type;
+       statement_kind_t         kind;
        statement_base_t         base;
        return_statement_t       returns;
        compound_statement_t     compound;
@@ -515,10 +648,13 @@ union statement_t {
        do_while_statement_t     do_while;
        for_statement_t          fors;
        asm_statement_t          asms;
+       ms_try_statement_t       ms_try;
+       leave_statement_t        leave;
 };
 
 struct translation_unit_t {
-       context_t context;
+       scope_t      scope;
+       statement_t *global_asm;
 };
 
 static inline
@@ -527,6 +663,18 @@ void *_allocate_ast(size_t size)
        return obstack_alloc(&ast_obstack, size);
 }
 
+static inline
+bool is_invalid_expression(expression_t *expression)
+{
+       return expression->base.kind == EXPR_INVALID;
+}
+
+static inline
+bool is_invalid_statement(statement_t *statement)
+{
+       return statement->base.kind == STATEMENT_INVALID;
+}
+
 #define allocate_ast(size)                 _allocate_ast(size)
 
 #endif