| /* Definitions for C parsing and type checking. |
| Copyright (C) 1987, 1993, 1994, 1995, 1997 Free Software Foundation, Inc. |
| |
| This file is part of GNU CC. |
| |
| GNU CC 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, or (at your option) |
| any later version. |
| |
| GNU CC 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 GNU CC; see the file COPYING. If not, write to |
| the Free Software Foundation, 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #ifndef _C_TREE_H |
| #define _C_TREE_H |
| |
| /* Language-dependent contents of an identifier. */ |
| |
| /* The limbo_value is used for block level extern declarations, which need |
| to be type checked against subsequent extern declarations. They can't |
| be referenced after they fall out of scope, so they can't be global. */ |
| |
| struct lang_identifier |
| { |
| struct tree_identifier ignore; |
| tree global_value, local_value, label_value, implicit_decl; |
| tree error_locus, limbo_value; |
| }; |
| |
| /* Macros for access to language-specific slots in an identifier. */ |
| /* Each of these slots contains a DECL node or null. */ |
| |
| /* This represents the value which the identifier has in the |
| file-scope namespace. */ |
| #define IDENTIFIER_GLOBAL_VALUE(NODE) \ |
| (((struct lang_identifier *) (NODE))->global_value) |
| /* This represents the value which the identifier has in the current |
| scope. */ |
| #define IDENTIFIER_LOCAL_VALUE(NODE) \ |
| (((struct lang_identifier *) (NODE))->local_value) |
| /* This represents the value which the identifier has as a label in |
| the current label scope. */ |
| #define IDENTIFIER_LABEL_VALUE(NODE) \ |
| (((struct lang_identifier *) (NODE))->label_value) |
| /* This records the extern decl of this identifier, if it has had one |
| at any point in this compilation. */ |
| #define IDENTIFIER_LIMBO_VALUE(NODE) \ |
| (((struct lang_identifier *) (NODE))->limbo_value) |
| /* This records the implicit function decl of this identifier, if it |
| has had one at any point in this compilation. */ |
| #define IDENTIFIER_IMPLICIT_DECL(NODE) \ |
| (((struct lang_identifier *) (NODE))->implicit_decl) |
| /* This is the last function in which we printed an "undefined variable" |
| message for this identifier. Value is a FUNCTION_DECL or null. */ |
| #define IDENTIFIER_ERROR_LOCUS(NODE) \ |
| (((struct lang_identifier *) (NODE))->error_locus) |
| |
| /* In identifiers, C uses the following fields in a special way: |
| TREE_PUBLIC to record that there was a previous local extern decl. |
| TREE_USED to record that such a decl was used. |
| TREE_ADDRESSABLE to record that the address of such a decl was used. */ |
| |
| /* Nonzero means reject anything that ANSI standard C forbids. */ |
| extern int pedantic; |
| |
| /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only. */ |
| #define C_TYPE_FIELDS_READONLY(type) TREE_LANG_FLAG_1 (type) |
| |
| /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is volatile. */ |
| #define C_TYPE_FIELDS_VOLATILE(type) TREE_LANG_FLAG_2 (type) |
| |
| /* In a RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE |
| nonzero if the definition of the type has already started. */ |
| #define C_TYPE_BEING_DEFINED(type) TYPE_LANG_FLAG_0 (type) |
| |
| /* In a RECORD_TYPE, a sorted array of the fields of the type. */ |
| struct lang_type |
| { |
| int len; |
| tree elts[1]; |
| }; |
| |
| /* Mark which labels are explicitly declared. |
| These may be shadowed, and may be referenced from nested functions. */ |
| #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label) |
| |
| /* Record whether a type or decl was written with nonconstant size. |
| Note that TYPE_SIZE may have simplified to a constant. */ |
| #define C_TYPE_VARIABLE_SIZE(type) TYPE_LANG_FLAG_1 (type) |
| #define C_DECL_VARIABLE_SIZE(type) DECL_LANG_FLAG_0 (type) |
| |
| /* Record in each node resulting from a binary operator |
| what operator was specified for it. */ |
| #define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp)) |
| |
| #if 0 /* Not used. */ |
| /* Record whether a decl for a function or function pointer has |
| already been mentioned (in a warning) because it was called |
| but didn't have a prototype. */ |
| #define C_MISSING_PROTOTYPE_WARNED(decl) DECL_LANG_FLAG_2(decl) |
| #endif |
| |
| /* Store a value in that field. */ |
| #define C_SET_EXP_ORIGINAL_CODE(exp, code) \ |
| (TREE_COMPLEXITY (exp) = (int) (code)) |
| |
| /* Record whether a typedef for type `int' was actually `signed int'. */ |
| #define C_TYPEDEF_EXPLICITLY_SIGNED(exp) DECL_LANG_FLAG_1 ((exp)) |
| |
| /* Nonzero for a declaration of a built in function if there has been no |
| occasion that would declare the function in ordinary C. |
| Using the function draws a pedantic warning in this case. */ |
| #define C_DECL_ANTICIPATED(exp) DECL_LANG_FLAG_3 ((exp)) |
| |
| /* For FUNCTION_TYPE, a hidden list of types of arguments. The same as |
| TYPE_ARG_TYPES for functions with prototypes, but created for functions |
| without prototypes. */ |
| #define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_NONCOPIED_PARTS (NODE) |
| |
| /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */ |
| #define DECL_C_BIT_FIELD(NODE) DECL_LANG_FLAG_4 (NODE) |
| |
| /* Nonzero if the type T promotes to itself. |
| ANSI C states explicitly the list of types that promote; |
| in particular, short promotes to int even if they have the same width. */ |
| #define C_PROMOTING_INTEGER_TYPE_P(t) \ |
| (TREE_CODE ((t)) == INTEGER_TYPE \ |
| && (TYPE_MAIN_VARIANT (t) == char_type_node \ |
| || TYPE_MAIN_VARIANT (t) == signed_char_type_node \ |
| || TYPE_MAIN_VARIANT (t) == unsigned_char_type_node \ |
| || TYPE_MAIN_VARIANT (t) == short_integer_type_node \ |
| || TYPE_MAIN_VARIANT (t) == short_unsigned_type_node)) |
| |
| /* In a VAR_DECL, means the variable is really an iterator. */ |
| #define ITERATOR_P(D) (DECL_LANG_FLAG_4(D)) |
| |
| /* In a VAR_DECL for an iterator, means we are within |
| an explicit loop over that iterator. */ |
| #define ITERATOR_BOUND_P(NODE) ((NODE)->common.readonly_flag) |
| |
| /* in c-lang.c and objc-act.c */ |
| extern tree lookup_interface PROTO((tree)); |
| extern tree is_class_name PROTO((tree)); |
| extern void maybe_objc_check_decl PROTO((tree)); |
| extern int maybe_objc_comptypes PROTO((tree, tree, int)); |
| extern tree maybe_building_objc_message_expr PROTO((void)); |
| extern tree maybe_objc_method_name PROTO((tree)); |
| extern int recognize_objc_keyword PROTO((void)); |
| extern tree build_objc_string PROTO((int, char *)); |
| |
| /* in c-aux-info.c */ |
| extern void gen_aux_info_record PROTO((tree, int, int, int)); |
| |
| /* in c-common.c */ |
| extern void declare_function_name PROTO((void)); |
| extern void decl_attributes PROTO((tree, tree, tree)); |
| extern void init_function_format_info PROTO((void)); |
| extern void record_function_format PROTO((tree, tree, int, int, int)); |
| extern void check_function_format PROTO((tree, tree, tree)); |
| /* Print an error message for invalid operands to arith operation CODE. |
| NOP_EXPR is used as a special case (see truthvalue_conversion). */ |
| extern void binary_op_error PROTO((enum tree_code)); |
| extern void c_expand_expr_stmt PROTO((tree)); |
| /* Validate the expression after `case' and apply default promotions. */ |
| extern tree check_case_value PROTO((tree)); |
| /* Concatenate a list of STRING_CST nodes into one STRING_CST. */ |
| extern tree combine_strings PROTO((tree)); |
| extern void constant_expression_warning PROTO((tree)); |
| extern tree convert_and_check PROTO((tree, tree)); |
| extern void overflow_warning PROTO((tree)); |
| extern void unsigned_conversion_warning PROTO((tree, tree)); |
| /* Read the rest of the current #-directive line. */ |
| extern char *get_directive_line STDIO_PROTO((FILE *)); |
| /* Subroutine of build_binary_op, used for comparison operations. |
| See if the operands have both been converted from subword integer types |
| and, if so, perhaps change them both back to their original type. */ |
| extern tree shorten_compare PROTO((tree *, tree *, tree *, enum tree_code *)); |
| /* Prepare expr to be an argument of a TRUTH_NOT_EXPR, |
| or validate its data type for an `if' or `while' statement or ?..: exp. */ |
| extern tree truthvalue_conversion PROTO((tree)); |
| extern tree type_for_mode PROTO((enum machine_mode, int)); |
| extern tree type_for_size PROTO((unsigned, int)); |
| |
| /* in c-convert.c */ |
| extern tree convert PROTO((tree, tree)); |
| |
| /* in c-decl.c */ |
| /* Standard named or nameless data types of the C compiler. */ |
| extern tree char_array_type_node; |
| extern tree char_type_node; |
| extern tree const_ptr_type_node; |
| extern tree const_string_type_node; |
| extern tree default_function_type; |
| extern tree double_ftype_double; |
| extern tree double_ftype_double_double; |
| extern tree double_type_node; |
| extern tree float_type_node; |
| extern tree intDI_type_node; |
| extern tree intHI_type_node; |
| extern tree intQI_type_node; |
| extern tree intSI_type_node; |
| extern tree int_array_type_node; |
| extern tree int_ftype_cptr_cptr_sizet; |
| extern tree int_ftype_int; |
| extern tree int_ftype_ptr_ptr_int; |
| extern tree int_ftype_string_string; |
| extern tree integer_type_node; |
| extern tree long_double_type_node; |
| extern tree long_ftype_long; |
| extern tree long_integer_type_node; |
| extern tree long_long_integer_type_node; |
| extern tree long_long_unsigned_type_node; |
| extern tree long_unsigned_type_node; |
| extern tree complex_integer_type_node; |
| extern tree complex_float_type_node; |
| extern tree complex_double_type_node; |
| extern tree complex_long_double_type_node; |
| extern tree ptr_type_node; |
| extern tree ptrdiff_type_node; |
| extern tree short_integer_type_node; |
| extern tree short_unsigned_type_node; |
| extern tree signed_char_type_node; |
| extern tree signed_wchar_type_node; |
| extern tree string_ftype_ptr_ptr; |
| extern tree string_type_node; |
| extern tree unsigned_char_type_node; |
| extern tree unsigned_intDI_type_node; |
| extern tree unsigned_intHI_type_node; |
| extern tree unsigned_intQI_type_node; |
| extern tree unsigned_intSI_type_node; |
| extern tree unsigned_type_node; |
| extern tree unsigned_wchar_type_node; |
| extern tree void_ftype_ptr_int_int; |
| extern tree void_ftype_ptr_ptr_int; |
| extern tree void_type_node; |
| extern tree wchar_array_type_node; |
| extern tree wchar_type_node; |
| extern tree boolean_type_node; |
| extern tree boolean_true_node; |
| extern tree boolean_false_node; |
| |
| extern tree build_enumerator PROTO((tree, tree)); |
| /* Declare a predefined function. Return the declaration. */ |
| extern tree builtin_function PROTO((char *, tree, enum built_in_function function_, char *)); |
| /* Add qualifiers to a type, in the fashion for C. */ |
| extern tree c_build_type_variant PROTO((tree, int, int)); |
| extern int c_decode_option PROTO((char *)); |
| extern void c_mark_varargs PROTO((void)); |
| extern tree check_identifier PROTO((tree, tree)); |
| extern void clear_parm_order PROTO((void)); |
| extern tree combine_parm_decls PROTO((tree, tree, int)); |
| extern int complete_array_type PROTO((tree, tree, int)); |
| extern void declare_parm_level PROTO((int)); |
| extern tree define_label PROTO((char *, int, tree)); |
| extern void delete_block PROTO((tree)); |
| extern void finish_decl PROTO((tree, tree, tree)); |
| extern void finish_decl_top_level PROTO((tree, tree, tree)); |
| extern tree finish_enum PROTO((tree, tree, tree)); |
| extern void finish_function PROTO((int)); |
| extern tree finish_struct PROTO((tree, tree, tree)); |
| extern tree get_parm_info PROTO((int)); |
| extern tree getdecls PROTO((void)); |
| extern tree gettags PROTO((void)); |
| extern int global_bindings_p PROTO((void)); |
| extern tree grokfield PROTO((char *, int, tree, tree, tree)); |
| extern tree groktypename PROTO((tree)); |
| extern tree groktypename_in_parm_context PROTO((tree)); |
| extern tree implicitly_declare PROTO((tree)); |
| extern int in_parm_level_p PROTO((void)); |
| extern void init_decl_processing PROTO((void)); |
| extern void insert_block PROTO((tree)); |
| extern void keep_next_level PROTO((void)); |
| extern int kept_level_p PROTO((void)); |
| extern tree lookup_label PROTO((tree)); |
| extern tree lookup_name PROTO((tree)); |
| extern tree lookup_name_current_level PROTO((tree)); |
| extern tree lookup_name_current_level_global PROTO((tree)); |
| extern tree maybe_build_cleanup PROTO((tree)); |
| extern void parmlist_tags_warning PROTO((void)); |
| extern void pending_xref_error PROTO((void)); |
| extern void pop_c_function_context PROTO((void)); |
| extern void pop_label_level PROTO((void)); |
| extern tree poplevel PROTO((int, int, int)); |
| extern void print_lang_decl STDIO_PROTO((FILE *, tree, |
| int)); |
| extern void print_lang_identifier STDIO_PROTO((FILE *, tree, |
| int)); |
| extern void print_lang_type STDIO_PROTO((FILE *, tree, |
| int)); |
| extern void push_c_function_context PROTO((void)); |
| extern void push_label_level PROTO((void)); |
| extern void push_parm_decl PROTO((tree)); |
| extern tree pushdecl PROTO((tree)); |
| extern tree pushdecl_top_level PROTO((tree)); |
| extern void pushlevel PROTO((int)); |
| extern void pushtag PROTO((tree, tree)); |
| extern void set_block PROTO((tree)); |
| extern tree shadow_label PROTO((tree)); |
| extern void shadow_record_fields PROTO((tree)); |
| extern void shadow_tag PROTO((tree)); |
| extern void shadow_tag_warned PROTO((tree, int)); |
| extern tree start_enum PROTO((tree)); |
| extern int start_function PROTO((tree, tree, tree, |
| tree, int)); |
| extern tree start_decl PROTO((tree, tree, int, |
| tree, tree)); |
| extern tree start_struct PROTO((enum tree_code, tree)); |
| extern void store_parm_decls PROTO((void)); |
| extern tree xref_tag PROTO((enum tree_code, tree)); |
| |
| /* in c-typeck.c */ |
| extern tree require_complete_type PROTO((tree)); |
| extern void incomplete_type_error PROTO((tree, tree)); |
| /* Given two integer or real types, return the type for their sum. |
| Given two compatible ANSI C types, returns the merged type. */ |
| extern tree common_type PROTO((tree, tree)); |
| extern int comptypes PROTO((tree, tree)); |
| extern int self_promoting_args_p PROTO((tree)); |
| extern tree c_sizeof PROTO((tree)); |
| extern tree c_sizeof_nowarn PROTO((tree)); |
| extern tree c_size_in_bytes PROTO((tree)); |
| extern tree c_alignof PROTO((tree)); |
| extern tree c_alignof_expr PROTO((tree)); |
| extern tree default_conversion PROTO((tree)); |
| extern tree build_component_ref PROTO((tree, tree)); |
| extern tree build_indirect_ref PROTO((tree, char *)); |
| extern tree build_array_ref PROTO((tree, tree)); |
| extern tree build_function_call PROTO((tree, tree)); |
| extern tree parser_build_binary_op PROTO((enum tree_code, |
| tree, tree)); |
| extern tree build_binary_op PROTO((enum tree_code, |
| tree, tree, int)); |
| extern tree build_unary_op PROTO((enum tree_code, |
| tree, int)); |
| extern int lvalue_p PROTO((tree)); |
| extern int lvalue_or_else PROTO((tree, char *)); |
| extern void readonly_warning PROTO((tree, char *)); |
| extern int mark_addressable PROTO((tree)); |
| extern tree build_conditional_expr PROTO((tree, tree, tree)); |
| extern tree build_compound_expr PROTO((tree)); |
| extern tree build_c_cast PROTO((tree, tree)); |
| extern tree build_modify_expr PROTO((tree, enum tree_code, |
| tree)); |
| extern tree initializer_constant_valid_p PROTO((tree, tree)); |
| extern void store_init_value PROTO((tree, tree)); |
| extern void error_init PROTO((char *, char *, |
| char *)); |
| extern void pedwarn_init PROTO((char *, char *, |
| char *)); |
| extern void start_init PROTO((tree, tree, int)); |
| extern void finish_init PROTO((void)); |
| extern void really_start_incremental_init PROTO((tree)); |
| extern void push_init_level PROTO((int)); |
| extern tree pop_init_level PROTO((int)); |
| extern void set_init_index PROTO((tree, tree)); |
| extern void set_init_label PROTO((tree)); |
| extern void process_init_element PROTO((tree)); |
| extern void c_expand_asm_operands PROTO((tree, tree, tree, tree, |
| int, char *, int)); |
| extern void c_expand_return PROTO((tree)); |
| extern tree c_expand_start_case PROTO((tree)); |
| |
| /* in c-iterate.c */ |
| extern void iterator_expand PROTO((tree)); |
| extern void iterator_for_loop_start PROTO((tree)); |
| extern void iterator_for_loop_end PROTO((tree)); |
| extern void iterator_for_loop_record PROTO((tree)); |
| extern void push_iterator_stack PROTO((void)); |
| extern void pop_iterator_stack PROTO((void)); |
| |
| /* Set to 0 at beginning of a function definition, set to 1 if |
| a return statement that specifies a return value is seen. */ |
| |
| extern int current_function_returns_value; |
| |
| /* Set to 0 at beginning of a function definition, set to 1 if |
| a return statement with no argument is seen. */ |
| |
| extern int current_function_returns_null; |
| |
| /* Nonzero means the expression being parsed will never be evaluated. |
| This is a count, since unevaluated expressions can nest. */ |
| |
| extern int skip_evaluation; |
| |
| /* Nonzero means `$' can be in an identifier. */ |
| |
| extern int dollars_in_ident; |
| |
| /* Nonzero means allow type mismatches in conditional expressions; |
| just make their values `void'. */ |
| |
| extern int flag_cond_mismatch; |
| |
| /* Nonzero means don't recognize the keyword `asm'. */ |
| |
| extern int flag_no_asm; |
| |
| /* Nonzero means environment is hosted (i.e., not freestanding) */ |
| |
| extern int flag_hosted; |
| |
| /* Nonzero means ignore `#ident' directives. */ |
| |
| extern int flag_no_ident; |
| |
| /* Nonzero means warn about implicit declarations. */ |
| |
| extern int warn_implicit; |
| |
| /* Nonzero means give string constants the type `const char *' |
| to get extra warnings from them. These warnings will be too numerous |
| to be useful, except in thoroughly ANSIfied programs. */ |
| |
| extern int warn_write_strings; |
| |
| /* Nonzero means warn about sizeof (function) or addition/subtraction |
| of function pointers. */ |
| |
| extern int warn_pointer_arith; |
| |
| /* Nonzero means warn for all old-style non-prototype function decls. */ |
| |
| extern int warn_strict_prototypes; |
| |
| /* Nonzero means warn about multiple (redundant) decls for the same single |
| variable or function. */ |
| |
| extern int warn_redundant_decls; |
| |
| /* Nonzero means warn about extern declarations of objects not at |
| file-scope level and about *all* declarations of functions (whether |
| extern or static) not at file-scope level. Note that we exclude |
| implicit function declarations. To get warnings about those, use |
| -Wimplicit. */ |
| |
| extern int warn_nested_externs; |
| |
| /* Nonzero means warn about pointer casts that can drop a type qualifier |
| from the pointer target type. */ |
| |
| extern int warn_cast_qual; |
| |
| /* Nonzero means warn when casting a function call to a type that does |
| not match the return type (e.g. (float)sqrt() or (anything*)malloc() |
| when there is no previous declaration of sqrt or malloc. */ |
| |
| extern int warn_bad_function_cast; |
| |
| /* Warn about traditional constructs whose meanings changed in ANSI C. */ |
| |
| extern int warn_traditional; |
| |
| /* Warn about *printf or *scanf format/argument anomalies. */ |
| |
| extern int warn_format; |
| |
| /* Warn about a subscript that has type char. */ |
| |
| extern int warn_char_subscripts; |
| |
| /* Warn if a type conversion is done that might have confusing results. */ |
| |
| extern int warn_conversion; |
| |
| /* Warn if main is suspicious. */ |
| |
| extern int warn_main; |
| |
| /* Nonzero means do some things the same way PCC does. */ |
| |
| extern int flag_traditional; |
| |
| /* Nonzero means to allow single precision math even if we're generally |
| being traditional. */ |
| extern int flag_allow_single_precision; |
| |
| /* Nonzero means warn about suggesting putting in ()'s. */ |
| |
| extern int warn_parentheses; |
| |
| /* Warn if initializer is not completely bracketed. */ |
| |
| extern int warn_missing_braces; |
| |
| /* Warn about comparison of signed and unsigned values. */ |
| |
| extern int warn_sign_compare; |
| |
| /* Nonzero means this is a function to call to perform comptypes |
| on two record types. */ |
| |
| extern int (*comptypes_record_hook) (); |
| |
| /* Nonzero means we are reading code that came from a system header file. */ |
| |
| extern int system_header_p; |
| |
| /* Nonzero enables objc features. */ |
| |
| extern int doing_objc_thang; |
| |
| #endif /* not _C_TREE_H */ |
