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Diffstat (limited to 'gnu/usr.bin/cc/include/c-tree.h')
| -rw-r--r-- | gnu/usr.bin/cc/include/c-tree.h | 483 |
1 files changed, 483 insertions, 0 deletions
diff --git a/gnu/usr.bin/cc/include/c-tree.h b/gnu/usr.bin/cc/include/c-tree.h new file mode 100644 index 0000000..2300351 --- /dev/null +++ b/gnu/usr.bin/cc/include/c-tree.h @@ -0,0 +1,483 @@ +/* Definitions for C parsing and type checking. + Copyright (C) 1987, 1993, 1994 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, 675 Mass Ave, Cambridge, MA 02139, 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) + +/* 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)); +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 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 tree finish_enum PROTO((tree, tree)); +extern void finish_function PROTO((int)); +extern tree finish_struct PROTO((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, int)); +extern tree start_decl PROTO((tree, tree, int)); +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 `$' 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 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; + +/* 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; + +/* 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 */ |
