+/* Record parser information about an expression that is irrelevant
+ for code generation alongside a tree representing its value. */
+struct c_expr
+{
+ /* The value of the expression. */
+ tree value;
+ /* Record the original unary/binary operator of an expression, which may
+ have been changed by fold, STRING_CST for unparenthesized string
+ constants, C_MAYBE_CONST_EXPR for __builtin_constant_p calls
+ (even if parenthesized), for subexpressions, and for non-constant
+ initializers, or ERROR_MARK for other expressions (including
+ parenthesized expressions). */
+ enum tree_code original_code;
+ /* If not NULL, the original type of an expression. This will
+ differ from the type of the value field for an enum constant.
+ The type of an enum constant is a plain integer type, but this
+ field will be the enum type. */
+ tree original_type;
+};
+
+/* A kind of type specifier. Note that this information is currently
+ only used to distinguish tag definitions, tag references and typeof
+ uses. */
+enum c_typespec_kind {
+ /* A reserved keyword type specifier. */
+ ctsk_resword,
+ /* A reference to a tag, previously declared, such as "struct foo".
+ This includes where the previous declaration was as a different
+ kind of tag, in which case this is only valid if shadowing that
+ tag in an inner scope. */
+ ctsk_tagref,
+ /* A reference to a tag, not previously declared in a visible
+ scope. */
+ ctsk_tagfirstref,
+ /* A definition of a tag such as "struct foo { int a; }". */
+ ctsk_tagdef,
+ /* A typedef name. */
+ ctsk_typedef,
+ /* An ObjC-specific kind of type specifier. */
+ ctsk_objc,
+ /* A typeof specifier. */
+ ctsk_typeof
+};
+
+/* A type specifier: this structure is created in the parser and
+ passed to declspecs_add_type only. */
+struct c_typespec {
+ /* What kind of type specifier this is. */
+ enum c_typespec_kind kind;
+ /* Whether the expression has operands suitable for use in constant
+ expressions. */
+ bool expr_const_operands;
+ /* The specifier itself. */
+ tree spec;
+ /* An expression to be evaluated before the type specifier, in the
+ case of typeof specifiers, or NULL otherwise or if no such
+ expression is required for a particular typeof specifier. In
+ particular, when typeof is applied to an expression of variably
+ modified type, that expression must be evaluated in order to
+ determine array sizes that form part of the type, but the
+ expression itself (as opposed to the array sizes) forms no part
+ of the type and so needs to be recorded separately. */
+ tree expr;
+};
+
+/* A storage class specifier. */
+enum c_storage_class {
+ csc_none,
+ csc_auto,
+ csc_extern,
+ csc_register,
+ csc_static,
+ csc_typedef
+};
+
+/* A type specifier keyword "void", "_Bool", "char", "int", "float",
+ "double", "_Decimal32", "_Decimal64", "_Decimal128", "_Fract", "_Accum",
+ or none of these. */
+enum c_typespec_keyword {
+ cts_none,
+ cts_void,
+ cts_bool,
+ cts_char,
+ cts_int,
+ cts_float,
+ cts_double,
+ cts_dfloat32,
+ cts_dfloat64,
+ cts_dfloat128,
+ cts_fract,
+ cts_accum
+};
+
+/* A sequence of declaration specifiers in C. */
+struct c_declspecs {
+ /* The type specified, if a single type specifier such as a struct,
+ union or enum specifier, typedef name or typeof specifies the
+ whole type, or NULL_TREE if none or a keyword such as "void" or
+ "char" is used. Does not include qualifiers. */
+ tree type;
+ /* Any expression to be evaluated before the type, from a typeof
+ specifier. */
+ tree expr;
+ /* The attributes from a typedef decl. */
+ tree decl_attr;
+ /* When parsing, the attributes. Outside the parser, this will be
+ NULL; attributes (possibly from multiple lists) will be passed
+ separately. */
+ tree attrs;
+ /* The storage class specifier, or csc_none if none. */
+ enum c_storage_class storage_class;
+ /* Any type specifier keyword used such as "int", not reflecting
+ modifiers such as "short", or cts_none if none. */
+ ENUM_BITFIELD (c_typespec_keyword) typespec_word : 8;
+ /* Whether any expressions in typeof specifiers may appear in
+ constant expressions. */
+ BOOL_BITFIELD expr_const_operands : 1;
+ /* Whether any declaration specifiers have been seen at all. */
+ BOOL_BITFIELD declspecs_seen_p : 1;
+ /* Whether a type specifier has been seen. */
+ BOOL_BITFIELD type_seen_p : 1;
+ /* Whether something other than a storage class specifier or
+ attribute has been seen. This is used to warn for the
+ obsolescent usage of storage class specifiers other than at the
+ start of the list. (Doing this properly would require function
+ specifiers to be handled separately from storage class
+ specifiers.) */
+ BOOL_BITFIELD non_sc_seen_p : 1;
+ /* Whether the type is specified by a typedef or typeof name. */
+ BOOL_BITFIELD typedef_p : 1;
+ /* Whether a struct, union or enum type either had its content
+ defined by a type specifier in the list or was the first visible
+ declaration of its tag. */
+ BOOL_BITFIELD tag_defined_p : 1;
+ /* Whether the type is explicitly "signed" or specified by a typedef
+ whose type is explicitly "signed". */
+ BOOL_BITFIELD explicit_signed_p : 1;
+ /* Whether the specifiers include a deprecated typedef. */
+ BOOL_BITFIELD deprecated_p : 1;
+ /* Whether the type defaulted to "int" because there were no type
+ specifiers. */
+ BOOL_BITFIELD default_int_p : 1;
+ /* Whether "long" was specified. */
+ BOOL_BITFIELD long_p : 1;
+ /* Whether "long" was specified more than once. */
+ BOOL_BITFIELD long_long_p : 1;
+ /* Whether "short" was specified. */
+ BOOL_BITFIELD short_p : 1;
+ /* Whether "signed" was specified. */
+ BOOL_BITFIELD signed_p : 1;
+ /* Whether "unsigned" was specified. */
+ BOOL_BITFIELD unsigned_p : 1;
+ /* Whether "complex" was specified. */
+ BOOL_BITFIELD complex_p : 1;
+ /* Whether "inline" was specified. */
+ BOOL_BITFIELD inline_p : 1;
+ /* Whether "__thread" was specified. */
+ BOOL_BITFIELD thread_p : 1;
+ /* Whether "const" was specified. */
+ BOOL_BITFIELD const_p : 1;
+ /* Whether "volatile" was specified. */
+ BOOL_BITFIELD volatile_p : 1;
+ /* Whether "restrict" was specified. */
+ BOOL_BITFIELD restrict_p : 1;
+ /* Whether "_Sat" was specified. */
+ BOOL_BITFIELD saturating_p : 1;
+ /* The address space that the declaration belongs to. */
+ addr_space_t address_space;
+};
+
+/* The various kinds of declarators in C. */
+enum c_declarator_kind {
+ /* An identifier. */
+ cdk_id,
+ /* A function. */
+ cdk_function,
+ /* An array. */
+ cdk_array,
+ /* A pointer. */
+ cdk_pointer,
+ /* Parenthesized declarator with nested attributes. */
+ cdk_attrs
+};
+
+/* Information about the parameters in a function declarator. */
+struct c_arg_info {
+ /* A list of parameter decls. */
+ tree parms;
+ /* A list of structure, union and enum tags defined. */
+ tree tags;
+ /* A list of argument types to go in the FUNCTION_TYPE. */
+ tree types;
+ /* A list of non-parameter decls (notably enumeration constants)
+ defined with the parameters. */
+ tree others;
+ /* A VEC of VLA sizes from the parameters. In a function
+ definition, these are used to ensure that side-effects in sizes
+ of arrays converted to pointers (such as a parameter int i[n++])
+ take place; otherwise, they are ignored. */
+ VEC(tree,gc) *pending_sizes;
+ /* True when these arguments had [*]. */
+ BOOL_BITFIELD had_vla_unspec : 1;
+};
+
+/* A declarator. */
+struct c_declarator {
+ /* The kind of declarator. */
+ enum c_declarator_kind kind;
+ location_t id_loc; /* Currently only set for cdk_id, cdk_array. */
+ /* Except for cdk_id, the contained declarator. For cdk_id, NULL. */
+ struct c_declarator *declarator;
+ union {
+ /* For identifiers, an IDENTIFIER_NODE or NULL_TREE if an abstract
+ declarator. */
+ tree id;
+ /* For functions. */
+ struct c_arg_info *arg_info;
+ /* For arrays. */
+ struct {
+ /* The array dimension, or NULL for [] and [*]. */
+ tree dimen;
+ /* The qualifiers inside []. */
+ int quals;
+ /* The attributes (currently ignored) inside []. */
+ tree attrs;
+ /* Whether [static] was used. */
+ BOOL_BITFIELD static_p : 1;
+ /* Whether [*] was used. */
+ BOOL_BITFIELD vla_unspec_p : 1;
+ } array;
+ /* For pointers, the qualifiers on the pointer type. */
+ int pointer_quals;
+ /* For attributes. */
+ tree attrs;
+ } u;
+};
+
+/* A type name. */
+struct c_type_name {
+ /* The declaration specifiers. */
+ struct c_declspecs *specs;
+ /* The declarator. */
+ struct c_declarator *declarator;
+};
+
+/* A parameter. */
+struct c_parm {
+ /* The declaration specifiers, minus any prefix attributes. */
+ struct c_declspecs *specs;
+ /* The attributes. */
+ tree attrs;
+ /* The declarator. */
+ struct c_declarator *declarator;
+};
+
+/* Used when parsing an enum. Initialized by start_enum. */
+struct c_enum_contents
+{
+ /* While defining an enum type, this is 1 plus the last enumerator
+ constant value. */
+ tree enum_next_value;
+
+ /* Nonzero means that there was overflow computing enum_next_value. */
+ int enum_overflow;
+};
+
+/* A type of reference to a static identifier in an inline
+ function. */
+enum c_inline_static_type {
+ /* Identifier with internal linkage used in function that may be an
+ inline definition (i.e., file-scope static). */
+ csi_internal,
+ /* Modifiable object with static storage duration defined in
+ function that may be an inline definition (i.e., local
+ static). */
+ csi_modifiable
+};
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