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parser.y
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%{
/*
* This parser is based on:
*
* c5.y, a ANSI-C grammar written by James A. Roskind.
* "Portions Copyright (c) 1989, 1990 James A. Roskind".
* (http://www.idiom.com/free-compilers/,
* ftp://ftp.infoseek.com/ftp/pub/c++grammar/,
* ftp://ftp.sra.co.jp/.a/pub/cmd/c++grammar2.0.tar.gz)
*/
#ifdef ANSI_C_DEBUG
#define YYDEBUG 1
#endif
#define PARSER (*ansi_c_parser)
#include "ansi_c_parser.h"
int yyansi_clex();
extern char *yyansi_ctext;
static ansi_c_parsert *ansi_c_parser;
int yyansi_cparse(void);
int yyansi_cparse(ansi_c_parsert &_ansi_c_parser)
{
ansi_c_parser = &_ansi_c_parser;
return yyansi_cparse();
}
int yyansi_cerror(const std::string &error)
{
ansi_c_parser->parse_error(error, yyansi_ctext);
return 0;
}
#include "parser_static.inc"
#include "literals/convert_integer_literal.h"
#include "ansi_c_y.tab.h"
#include <util/mathematical_expr.h>
#ifdef _MSC_VER
// possible loss of data
#pragma warning(disable:4242)
// possible loss of data
#pragma warning(disable:4244)
// signed/unsigned mismatch
#pragma warning(disable:4365)
// switch with default but no case labels
#pragma warning(disable:4065)
// unreachable code
#pragma warning(disable:4702)
#endif
// statements have right recursion, deep nesting of statements thus
// requires more stack space
#define YYMAXDEPTH 25600
/*** token declaration **************************************************/
%}
/*** ANSI-C keywords ***/
%token TOK_AUTO "auto"
%token TOK_BOOL "bool"
%token TOK_COMPLEX "complex"
%token TOK_BREAK "break"
%token TOK_CASE "case"
%token TOK_CHAR "char"
%token TOK_CONST "const"
%token TOK_CONTINUE "continue"
%token TOK_DEFAULT "default"
%token TOK_DO "do"
%token TOK_DOUBLE "double"
%token TOK_ELSE "else"
%token TOK_ENUM "enum"
%token TOK_EXTERN "extern"
%token TOK_FLOAT "float"
%token TOK_FOR "for"
%token TOK_GOTO "goto"
%token TOK_IF "if"
%token TOK_INLINE "inline"
%token TOK_INT "int"
%token TOK_LONG "long"
%token TOK_REGISTER "register"
%token TOK_RESTRICT "restrict"
%token TOK_RETURN "return"
%token TOK_SHORT "short"
%token TOK_SIGNED "signed"
%token TOK_SIZEOF "sizeof"
%token TOK_STATIC "static"
%token TOK_STRUCT "struct"
%token TOK_SWITCH "switch"
%token TOK_TYPEDEF "typedef"
%token TOK_UNION "union"
%token TOK_UNSIGNED "unsigned"
%token TOK_VOID "void"
%token TOK_VOLATILE "volatile"
%token TOK_WCHAR_T "wchar_t"
%token TOK_WHILE "while"
/*** multi-character operators ***/
%token TOK_ARROW "->"
%token TOK_INCR "++"
%token TOK_DECR "--"
%token TOK_SHIFTLEFT "<<"
%token TOK_SHIFTRIGHT ">>"
%token TOK_LE "<="
%token TOK_GE ">="
%token TOK_EQ "=="
%token TOK_NE "!="
%token TOK_ANDAND "&&"
%token TOK_OROR "||"
%token TOK_ELLIPSIS "..."
/*** modifying assignment operators ***/
%token TOK_MULTASSIGN "*="
%token TOK_DIVASSIGN "/="
%token TOK_MODASSIGN "%="
%token TOK_PLUSASSIGN "+="
%token TOK_MINUSASSIGN "-="
%token TOK_SHLASSIGN "<<="
%token TOK_SHRASSIGN ">>="
%token TOK_ANDASSIGN "&="
%token TOK_XORASSIGN "^="
%token TOK_ORASSIGN "|="
/*** scanner parsed tokens (these have a value!) ***/
%token TOK_GCC_IDENTIFIER
%token TOK_MSC_IDENTIFIER
%token TOK_TYPEDEFNAME
%token TOK_INTEGER
%token TOK_FLOATING
%token TOK_CHARACTER
%token TOK_STRING
%token TOK_ASM_STRING
/*** extensions ***/
%token TOK_INT8 "__int8"
%token TOK_INT16 "__int16"
%token TOK_INT32 "__int32"
%token TOK_INT64 "__int64"
%token TOK_PTR32 "__ptr32"
%token TOK_PTR64 "__ptr64"
%token TOK_TYPEOF "typeof"
%token TOK_GCC_AUTO_TYPE "__auto_type"
%token TOK_GCC_FLOAT16 "_Float16"
%token TOK_GCC_FLOAT32 "_Float32"
%token TOK_GCC_FLOAT32X "_Float32x"
%token TOK_GCC_FLOAT80 "__float80"
%token TOK_GCC_FLOAT64 "_Float64"
%token TOK_GCC_FLOAT64X "_Float64x"
%token TOK_GCC_FLOAT128 "_Float128"
%token TOK_GCC_FLOAT128X "_Float128x"
%token TOK_GCC_INT128 "__int128"
%token TOK_GCC_DECIMAL32 "_Decimal32"
%token TOK_GCC_DECIMAL64 "_Decimal64"
%token TOK_GCC_DECIMAL128 "_Decimal128"
%token TOK_GCC_ASM "__asm__"
%token TOK_GCC_ASM_PAREN "__asm__ (with parentheses)"
%token TOK_GCC_ATTRIBUTE "__attribute__"
%token TOK_GCC_ATTRIBUTE_ALIGNED "aligned"
%token TOK_GCC_ATTRIBUTE_TRANSPARENT_UNION "transparent_union"
%token TOK_GCC_ATTRIBUTE_PACKED "packed"
%token TOK_GCC_ATTRIBUTE_VECTOR_SIZE "vector_size"
%token TOK_GCC_ATTRIBUTE_MODE "mode"
%token TOK_GCC_ATTRIBUTE_GNU_INLINE "__gnu_inline__"
%token TOK_GCC_ATTRIBUTE_WEAK "weak"
%token TOK_GCC_ATTRIBUTE_ALIAS "alias"
%token TOK_GCC_ATTRIBUTE_SECTION "section"
%token TOK_GCC_ATTRIBUTE_NORETURN "noreturn"
%token TOK_GCC_ATTRIBUTE_CONSTRUCTOR "constructor"
%token TOK_GCC_ATTRIBUTE_DESTRUCTOR "destructor"
%token TOK_GCC_ATTRIBUTE_FALLTHROUGH "fallthrough"
%token TOK_GCC_ATTRIBUTE_USED "used"
%token TOK_GCC_LABEL "__label__"
%token TOK_MSC_ASM "__asm"
%token TOK_MSC_BASED "__based"
%token TOK_CW_VAR_ARG_TYPEOF "_var_arg_typeof"
%token TOK_BUILTIN_VA_ARG "__builtin_va_arg"
%token TOK_GCC_BUILTIN_TYPES_COMPATIBLE_P "__builtin_types_compatible_p"
%token TOK_CLANG_BUILTIN_CONVERTVECTOR "__builtin_convertvector"
%token TOK_OFFSETOF "__offsetof"
%token TOK_ALIGNOF "__alignof__"
%token TOK_MSC_TRY "__try"
%token TOK_MSC_FINALLY "__finally"
%token TOK_MSC_EXCEPT "__except"
%token TOK_MSC_LEAVE "__leave"
%token TOK_MSC_DECLSPEC "__declspec"
%token TOK_MSC_FORCEINLINE "__forceinline"
%token TOK_INTERFACE "__interface"
%token TOK_CDECL "__cdecl"
%token TOK_STDCALL "__stdcall"
%token TOK_FASTCALL "__fastcall"
%token TOK_CLRCALL "__clrcall"
%token TOK_FORALL "forall"
%token TOK_EXISTS "exists"
%token TOK_ACSL_FORALL "\\forall"
%token TOK_ACSL_EXISTS "\\exists"
%token TOK_ACSL_LAMBDA "\\lambda"
%token TOK_ACSL_LET "\\let"
%token TOK_ARRAY_OF "array_of"
%token TOK_CPROVER_BITVECTOR "__CPROVER_bitvector"
%token TOK_CPROVER_FLOATBV "__CPROVER_floatbv"
%token TOK_CPROVER_FIXEDBV "__CPROVER_fixedbv"
%token TOK_CPROVER_ATOMIC "__CPROVER_atomic"
%token TOK_CPROVER_BOOL "__CPROVER_bool"
%token TOK_CPROVER_THROW "__CPROVER_throw"
%token TOK_CPROVER_CATCH "__CPROVER_catch"
%token TOK_CPROVER_TRY "__CPROVER_try"
%token TOK_CPROVER_FINALLY "__CPROVER_finally"
%token TOK_CPROVER_ID "__CPROVER_ID"
%token TOK_CPROVER_LOOP_INVARIANT "__CPROVER_loop_invariant"
%token TOK_CPROVER_DECREASES "__CPROVER_decreases"
%token TOK_CPROVER_REQUIRES "__CPROVER_requires"
%token TOK_CPROVER_ENSURES "__CPROVER_ensures"
%token TOK_CPROVER_ASSIGNS "__CPROVER_assigns"
%token TOK_CPROVER_FREES "__CPROVER_frees"
%token TOK_IMPLIES "==>"
%token TOK_EQUIVALENT "<==>"
%token TOK_XORXOR "^^"
%token TOK_TRUE "TRUE"
%token TOK_FALSE "FALSE"
%token TOK_REAL "__real__"
%token TOK_IMAG "__imag__"
%token TOK_ALIGNAS "_Alignas"
%token TOK_ATOMIC_TYPE_QUALIFIER "_Atomic"
%token TOK_ATOMIC_TYPE_SPECIFIER "_Atomic()"
%token TOK_GENERIC "_Generic"
%token TOK_IMAGINARY "_Imaginary"
%token TOK_NORETURN "_Noreturn"
%token TOK_STATIC_ASSERT "_Static_assert"
%token TOK_THREAD_LOCAL "_Thread_local"
%token TOK_NULLPTR "nullptr"
%token TOK_CONSTEXPR "constexpr"
/*** special scanner reports ***/
%token TOK_SCANNER_ERROR /* used by scanner to report errors */
%token TOK_SCANNER_EOF /* used by scanner to report end of import */
/*** these exist only for the benefit of the C++ frontend */
%token TOK_CATCH "catch"
%token TOK_CHAR16_T "char16_t"
%token TOK_CHAR32_T "char32_t"
%token TOK_CLASS "class"
%token TOK_DELETE "delete"
%token TOK_DECLTYPE "decltype"
%token TOK_EXPLICIT "explicit"
%token TOK_FRIEND "friend"
%token TOK_MUTABLE "mutable"
%token TOK_NAMESPACE "namespace"
%token TOK_NEW "new"
%token TOK_NOEXCEPT "noexcept"
%token TOK_OPERATOR "operator"
%token TOK_PRIVATE "private"
%token TOK_PROTECTED "protected"
%token TOK_PUBLIC "public"
%token TOK_TEMPLATE "template"
%token TOK_THIS "this"
%token TOK_THROW "throw"
%token TOK_TYPEID "typeid"
%token TOK_TYPENAME "typename"
%token TOK_TRY "try"
%token TOK_USING "using"
%token TOK_VIRTUAL "virtual"
%token TOK_SCOPE "::"
%token TOK_DOTPM ".*"
%token TOK_ARROWPM "->*"
%token TOK_UNARY_TYPE_PREDICATE
%token TOK_BINARY_TYPE_PREDICATE
%token TOK_MSC_UUIDOF "__uuidof"
%token TOK_MSC_IF_EXISTS "__if_exists"
%token TOK_MSC_IF_NOT_EXISTS "__if_not_exists"
%token TOK_UNDERLYING_TYPE "__underlying_type"
/*** priority, associativity, etc. definitions **************************/
%start grammar
%expect 2 /* the famous "dangling `else'" ambiguity */
/* results in one shift/reduce conflict */
/* that we don't want to be reported */
/* a second shift/reduce conflict arises due to enum underlying */
/* type specifications and bitfield specifications, which are both */
/* introduced by a ':' and follow a type */
%{
/************************************************************************/
/*** rules **************************************************************/
/************************************************************************/
%}
%%
grammar:
translation_unit
;
/*** Token with values **************************************************/
identifier:
TOK_GCC_IDENTIFIER
| TOK_MSC_IDENTIFIER
| TOK_CPROVER_ID TOK_STRING
{
// construct an identifier from a string that would otherwise not be a
// valid identifier in C
$$=$1;
parser_stack($$).id(ID_symbol);
irep_idt value=parser_stack($2).get(ID_value);
parser_stack($$).set(ID_C_base_name, value);
parser_stack($$).set(ID_identifier, value);
parser_stack($$).set(
ID_C_id_class, static_cast<int>(ansi_c_id_classt::ANSI_C_SYMBOL));
}
;
typedef_name:
TOK_TYPEDEFNAME
;
integer:
TOK_INTEGER
;
floating:
TOK_FLOATING
;
character:
TOK_CHARACTER
;
string:
TOK_STRING
;
/*** Constants **********************************************************/
constant: integer
| floating
| character
| string
;
/*** Expressions ********************************************************/
primary_expression:
identifier
| constant
| '(' comma_expression ')'
{ $$ = $2; }
| statement_expression
| gcc_builtin_expressions
| clang_builtin_expressions
| cw_builtin_expressions
| offsetof
| quantifier_expression
| generic_selection
;
generic_selection:
TOK_GENERIC '(' assignment_expression ',' generic_assoc_list ')'
{
$$=$1;
set($$, ID_generic_selection);
mto($$, $3);
parser_stack($$).add(ID_generic_associations).get_sub().swap((irept::subt&)parser_stack($5).operands());
}
;
generic_assoc_list:
generic_association
{
init($$); mto($$, $1);
}
| generic_assoc_list ',' generic_association
{
$$=$1; mto($$, $3);
}
;
generic_association:
type_name ':' assignment_expression
{
$$=$2;
parser_stack($$).id(ID_generic_association);
parser_stack($$).set(ID_type_arg, parser_stack($1));
parser_stack($$).set(ID_value, parser_stack($3));
}
| TOK_DEFAULT ':' assignment_expression
{
$$=$2;
parser_stack($$).id(ID_generic_association);
parser_stack($$).set(ID_type_arg, irept(ID_default));
parser_stack($$).set(ID_value, parser_stack($3));
}
;
gcc_builtin_expressions:
TOK_BUILTIN_VA_ARG '(' assignment_expression ',' type_name ')'
{
$$=$1;
parser_stack($$).id(ID_gcc_builtin_va_arg);
mto($$, $3);
parser_stack($$).type().swap(parser_stack($5));
}
| TOK_GCC_BUILTIN_TYPES_COMPATIBLE_P '('
type_name ',' type_name ')'
{
$$=$1;
parser_stack($$).id(ID_gcc_builtin_types_compatible_p);
auto &type_arg=static_cast<type_with_subtypest &>(parser_stack($$).add(ID_type_arg));
auto &subtypes=type_arg.subtypes();
subtypes.resize(2);
subtypes[0].swap(parser_stack($3));
subtypes[1].swap(parser_stack($5));
}
;
clang_builtin_expressions:
TOK_CLANG_BUILTIN_CONVERTVECTOR '(' assignment_expression ',' type_name ')'
{
$$=$1;
parser_stack($$).id(ID_clang_builtin_convertvector);
mto($$, $3);
parser_stack($$).type().swap(parser_stack($5));
}
;
cw_builtin_expressions:
TOK_CW_VAR_ARG_TYPEOF '(' type_name ')'
{
$$=$1;
parser_stack($$).id(ID_cw_va_arg_typeof);
parser_stack($$).add(ID_type_arg).swap(parser_stack($3));
}
;
offsetof:
TOK_OFFSETOF '(' type_name ',' offsetof_member_designator ')'
{
$$=$1;
parser_stack($$).id(ID_builtin_offsetof);
parser_stack($$).add(ID_type_arg).swap(parser_stack($3));
parser_stack($$).add(ID_designator).swap(parser_stack($5));
}
;
offsetof_member_designator:
member_name
{
init($$);
exprt op{ID_member};
op.add_source_location()=parser_stack($1).source_location();
op.set(ID_component_name, parser_stack($1).get(ID_C_base_name));
parser_stack($$).add_to_operands(std::move(op));
}
| offsetof_member_designator '.' member_name
{
$$=$1;
set($2, ID_member);
parser_stack($2).set(ID_component_name, parser_stack($3).get(ID_C_base_name));
mto($$, $2);
}
| offsetof_member_designator '[' comma_expression ']'
{
$$=$1;
set($2, ID_index);
mto($2, $3);
mto($$, $2);
}
| offsetof_member_designator TOK_ARROW member_name
{
$$=$1;
set($2, ID_index);
parser_stack($2).add_to_operands(convert_integer_literal("0"));
mto($$, $2);
set($2, ID_member);
parser_stack($2).set(ID_component_name, parser_stack($3).get(ID_C_base_name));
mto($$, $2);
}
;
quantifier_expression:
TOK_FORALL compound_scope '{' declaration comma_expression '}'
{
$$=$1;
set($$, ID_forall);
parser_stack($$).add_to_operands(tuple_exprt( { std::move(parser_stack($4)) } ));
mto($$, $5);
PARSER.pop_scope();
}
| TOK_EXISTS compound_scope '{' declaration comma_expression '}'
{
$$=$1;
set($$, ID_exists);
parser_stack($$).add_to_operands(tuple_exprt( { std::move(parser_stack($4)) } ));
mto($$, $5);
PARSER.pop_scope();
}
;
cprover_contract_loop_invariant:
TOK_CPROVER_LOOP_INVARIANT '(' ACSL_binding_expression ')'
{ $$=$3; }
;
cprover_contract_loop_invariant_list:
cprover_contract_loop_invariant
{ init($$); mto($$, $1); }
| cprover_contract_loop_invariant_list cprover_contract_loop_invariant
{ $$=$1; mto($$, $2); }
;
cprover_contract_loop_invariant_list_opt:
/* nothing */
{ init($$); parser_stack($$).make_nil(); }
| cprover_contract_loop_invariant_list
;
ACSL_binding_expression_list:
ACSL_binding_expression
{ init($$); mto($$, $1); }
| ACSL_binding_expression_list ',' ACSL_binding_expression
{ $$=$1; mto($$, $3); }
;
cprover_contract_decreases_opt:
/* nothing */
{ init($$); parser_stack($$).make_nil(); }
| TOK_CPROVER_DECREASES '(' ACSL_binding_expression_list ')'
{ $$=$3; }
;
statement_expression: '(' compound_statement ')'
{
$$=$1;
set($$, ID_side_effect);
parser_stack($$).set(ID_statement, ID_statement_expression);
mto($$, $2);
}
;
postfix_expression:
primary_expression
| postfix_expression '[' comma_expression ']'
{ binary($$, $1, $2, ID_index, $3); }
| postfix_expression '(' ')'
{ $$=$2;
set($$, ID_side_effect);
auto &side_effect = to_side_effect_expr(parser_stack($$));
side_effect.set_statement(ID_function_call);
side_effect.operands().resize(2);
to_binary_expr(side_effect).op0().swap(parser_stack($1));
to_binary_expr(side_effect).op1().clear();
to_binary_expr(side_effect).op1().id(ID_arguments);
}
| postfix_expression '(' argument_expression_list ')'
{ $$=$2;
set($$, ID_side_effect);
auto &side_effect = to_side_effect_expr(parser_stack($$));
side_effect.set_statement(ID_function_call);
side_effect.operands().resize(2);
to_binary_expr(side_effect).op0().swap(parser_stack($1));
to_binary_expr(side_effect).op1().swap(parser_stack($3));
to_binary_expr(side_effect).op1().id(ID_arguments);
}
| postfix_expression '.' member_name
{ $$=$2;
set($$, ID_member);
mto($$, $1);
parser_stack($$).set(ID_component_name, parser_stack($3).get(ID_C_base_name));
}
| postfix_expression TOK_ARROW member_name
{ $$=$2;
set($$, ID_ptrmember);
mto($$, $1);
parser_stack($$).set(ID_component_name, parser_stack($3).get(ID_C_base_name));
}
| postfix_expression TOK_INCR
{ $$=$2;
set($$, ID_side_effect);
parser_stack($$).set(ID_statement, ID_postincrement);
mto($$, $1);
}
| postfix_expression TOK_DECR
{ $$=$2;
set($$, ID_side_effect);
parser_stack($$).set(ID_statement, ID_postdecrement);
mto($$, $1);
}
/* The following is a) GCC and b) ISO C 11 compliant */
| '(' type_name ')' '{' initializer_list_opt '}'
{
exprt tmp(ID_initializer_list);
tmp.add_source_location()=parser_stack($4).source_location();
tmp.operands().swap(parser_stack($5).operands());
$$=$1;
set($$, ID_typecast);
parser_stack($$).add_to_operands(std::move(tmp));
parser_stack($$).type().swap(parser_stack($2));
}
| '(' type_name ')' '{' initializer_list ',' '}'
{
// same as above
exprt tmp(ID_initializer_list);
tmp.add_source_location()=parser_stack($4).source_location();
tmp.operands().swap(parser_stack($5).operands());
$$=$1;
set($$, ID_typecast);
parser_stack($$).add_to_operands(std::move(tmp));
parser_stack($$).type().swap(parser_stack($2));
}
;
member_name:
identifier
| typedef_name
;
argument_expression_list:
assignment_expression
{
init($$, ID_expression_list);
mto($$, $1);
}
| argument_expression_list ',' assignment_expression
{
$$=$1;
mto($$, $3);
}
;
unary_expression:
postfix_expression
| TOK_INCR unary_expression
{ $$=$1;
set($$, ID_side_effect);
parser_stack($$).set(ID_statement, ID_preincrement);
mto($$, $2);
}
| TOK_DECR unary_expression
{ $$=$1;
set($$, ID_side_effect);
parser_stack($$).set(ID_statement, ID_predecrement);
mto($$, $2);
}
| '&' cast_expression
{ $$=$1;
set($$, ID_address_of);
mto($$, $2);
}
| TOK_ANDAND gcc_local_label
{ // this takes the address of a label (a gcc extension)
$$=$1;
irep_idt identifier=PARSER.lookup_label(parser_stack($2).get(ID_C_base_name));
set($$, ID_address_of);
parser_stack($$).operands().resize(1);
auto &op = to_unary_expr(parser_stack($$)).op();
op=parser_stack($2);
op.id(ID_label);
op.set(ID_identifier, identifier);
}
| '*' cast_expression
{ $$=$1;
set($$, ID_dereference);
mto($$, $2);
}
| '+' cast_expression
{ $$=$1;
set($$, ID_unary_plus);
mto($$, $2);
}
| '-' cast_expression
{ $$=$1;
set($$, ID_unary_minus);
mto($$, $2);
}
| '~' cast_expression
{ $$=$1;
set($$, ID_bitnot);
mto($$, $2);
}
| '!' cast_expression
{ $$=$1;
set($$, ID_not);
mto($$, $2);
}
| TOK_SIZEOF unary_expression
{ $$=$1;
set($$, ID_sizeof);
mto($$, $2);
}
| TOK_SIZEOF '(' type_name ')'
{ $$=$1;
set($$, ID_sizeof);
parser_stack($$).add(ID_type_arg).swap(parser_stack($3));
}
| TOK_ALIGNOF unary_expression
{ // note no parentheses for expressions, just like sizeof
$$=$1;
set($$, ID_alignof);
mto($$, $2);
}
| TOK_ALIGNOF '(' type_name ')'
{
$$=$1;
parser_stack($$).id(ID_alignof);
parser_stack($$).add(ID_type_arg).swap(parser_stack($3));
}
;
cast_expression:
unary_expression
| '(' type_name ')' cast_expression
{
$$=$1;
set($$, ID_typecast);
mto($$, $4);
parser_stack($$).type().swap(parser_stack($2));
}
| TOK_REAL cast_expression
{ $$=$1;
set($$, ID_complex_real);
mto($$, $2);
}
| TOK_IMAG cast_expression
{ $$=$1;
set($$, ID_complex_imag);
mto($$, $2);
}
;
multiplicative_expression:
cast_expression
| multiplicative_expression '*' cast_expression
{ binary($$, $1, $2, ID_mult, $3); }
| multiplicative_expression '/' cast_expression
{ binary($$, $1, $2, ID_div, $3); }
| multiplicative_expression '%' cast_expression
{ binary($$, $1, $2, ID_mod, $3); }
;
additive_expression:
multiplicative_expression
| additive_expression '+' multiplicative_expression
{ binary($$, $1, $2, ID_plus, $3); }
| additive_expression '-' multiplicative_expression
{ binary($$, $1, $2, ID_minus, $3); }
;
shift_expression:
additive_expression
| shift_expression TOK_SHIFTLEFT additive_expression
{ binary($$, $1, $2, ID_shl, $3); }
| shift_expression TOK_SHIFTRIGHT additive_expression
{ binary($$, $1, $2, ID_shr, $3); }
;
relational_expression:
shift_expression
| relational_expression '<' shift_expression
{ binary($$, $1, $2, ID_lt, $3); }
| relational_expression '>' shift_expression
{ binary($$, $1, $2, ID_gt, $3); }
| relational_expression TOK_LE shift_expression
{ binary($$, $1, $2, ID_le, $3); }
| relational_expression TOK_GE shift_expression
{ binary($$, $1, $2, ID_ge, $3); }
;
equality_expression:
relational_expression
| equality_expression TOK_EQ relational_expression
{ binary($$, $1, $2, ID_equal, $3); }
| equality_expression TOK_NE relational_expression
{ binary($$, $1, $2, ID_notequal, $3); }
;
and_expression:
equality_expression
| and_expression '&' equality_expression
{ binary($$, $1, $2, ID_bitand, $3); }
;
exclusive_or_expression:
and_expression
| exclusive_or_expression '^' and_expression
{ binary($$, $1, $2, ID_bitxor, $3); }
;
inclusive_or_expression:
exclusive_or_expression
| inclusive_or_expression '|' exclusive_or_expression
{ binary($$, $1, $2, ID_bitor, $3); }
;
logical_and_expression:
inclusive_or_expression
| logical_and_expression TOK_ANDAND inclusive_or_expression
{ binary($$, $1, $2, ID_and, $3); }
;
logical_xor_expression:
logical_and_expression
| logical_xor_expression TOK_XORXOR logical_and_expression
{ binary($$, $1, $2, ID_xor, $3); }
;
logical_or_expression:
logical_xor_expression
| logical_or_expression TOK_OROR logical_xor_expression
{ binary($$, $1, $2, ID_or, $3); }
;
/* This is obviously non-standard, but inspired by Spec#. */
/* Implication is generally considered to be right-associative,
and binds weaker than 'OR', and stronger than bi-implication. */
logical_implication_expression:
logical_or_expression
| logical_or_expression TOK_IMPLIES logical_implication_expression
{ binary($$, $1, $2, ID_implies, $3); }
;
/* This is obviously non-standard, but inspired by Spec#. */
/* Bi-Implication is generally considered to be left-associative,
and binds weaker than '==>', and stronger than quantifiers. */
logical_equivalence_expression:
logical_implication_expression
| logical_equivalence_expression TOK_EQUIVALENT logical_implication_expression
{ binary($$, $1, $2, ID_equal, $3); }
;
/* Non-standard, defined by ACSL. Lowest precedence of all operators. */
ACSL_binding_expression:
conditional_expression
| TOK_ACSL_FORALL compound_scope declaration ACSL_binding_expression
{
$$=$1;
set($$, ID_forall);
parser_stack($$).add_to_operands(tuple_exprt( { std::move(parser_stack($3)) } ));
mto($$, $4);
PARSER.pop_scope();
}
| TOK_ACSL_EXISTS compound_scope declaration ACSL_binding_expression
{
$$=$1;
set($$, ID_exists);
parser_stack($$).add_to_operands(tuple_exprt( { std::move(parser_stack($3)) } ));
mto($$, $4);
PARSER.pop_scope();
}
| TOK_ACSL_LAMBDA compound_scope declaration ACSL_binding_expression
{
$$=$1;
set($$, ID_lambda);
parser_stack($$).add_to_operands(tuple_exprt( { std::move(parser_stack($3)) } ));
mto($$, $4);
PARSER.pop_scope();
}
;
conditional_expression:
logical_equivalence_expression
| logical_equivalence_expression '?' comma_expression ':' conditional_expression
{ $$=$2;
parser_stack($$).id(ID_if);
mto($$, $1);
mto($$, $3);
mto($$, $5);
}
| logical_equivalence_expression '?' ':' conditional_expression
{ $$=$2;
parser_stack($$).id(ID_side_effect);
parser_stack($$).set(ID_statement, ID_gcc_conditional_expression);
mto($$, $1);
mto($$, $4);
}
;
assignment_expression:
ACSL_binding_expression /* usually conditional_expression */
| cast_expression '=' assignment_expression
{ binary($$, $1, $2, ID_side_effect, $3); parser_stack($$).set(ID_statement, ID_assign); }
| cast_expression TOK_MULTASSIGN assignment_expression
{ binary($$, $1, $2, ID_side_effect, $3); parser_stack($$).set(ID_statement, ID_assign_mult); }
| cast_expression TOK_DIVASSIGN assignment_expression
{ binary($$, $1, $2, ID_side_effect, $3); parser_stack($$).set(ID_statement, ID_assign_div); }
| cast_expression TOK_MODASSIGN assignment_expression
{ binary($$, $1, $2, ID_side_effect, $3); parser_stack($$).set(ID_statement, ID_assign_mod); }
| cast_expression TOK_PLUSASSIGN assignment_expression
{ binary($$, $1, $2, ID_side_effect, $3); parser_stack($$).set(ID_statement, ID_assign_plus); }
| cast_expression TOK_MINUSASSIGN assignment_expression
{ binary($$, $1, $2, ID_side_effect, $3); parser_stack($$).set(ID_statement, ID_assign_minus); }
| cast_expression TOK_SHLASSIGN assignment_expression
{ binary($$, $1, $2, ID_side_effect, $3); parser_stack($$).set(ID_statement, ID_assign_shl); }
| cast_expression TOK_SHRASSIGN assignment_expression
{ binary($$, $1, $2, ID_side_effect, $3); parser_stack($$).set(ID_statement, ID_assign_shr); }
| cast_expression TOK_ANDASSIGN assignment_expression
{ binary($$, $1, $2, ID_side_effect, $3); parser_stack($$).set(ID_statement, ID_assign_bitand); }
| cast_expression TOK_XORASSIGN assignment_expression
{ binary($$, $1, $2, ID_side_effect, $3); parser_stack($$).set(ID_statement, ID_assign_bitxor); }
| cast_expression TOK_ORASSIGN assignment_expression
{ binary($$, $1, $2, ID_side_effect, $3); parser_stack($$).set(ID_statement, ID_assign_bitor); }
;
comma_expression:
assignment_expression
| comma_expression ',' assignment_expression
{ binary($$, $1, $2, ID_comma, $3); }
;
constant_expression:
assignment_expression
;
comma_expression_opt:
/* nothing */
{ init($$); parser_stack($$).make_nil(); }
| comma_expression
;
/*** Declarations *******************************************************/
declaration:
declaration_specifier ';'
{
// type only, no declarator!
init($$, ID_declaration);
parser_stack($$).type().swap(parser_stack($1));
}
| type_specifier ';'
{
// type only, no identifier!
init($$, ID_declaration);
parser_stack($$).type().swap(parser_stack($1));
}
| static_assert_declaration ';'
| declaring_list ';'
| default_declaring_list ';'
;
static_assert_declaration:
TOK_STATIC_ASSERT '(' assignment_expression ',' assignment_expression ')'
{
$$=$1;
set($$, ID_declaration);
to_ansi_c_declaration(parser_stack($$)).set_is_static_assert(true);
mto($$, $3);
mto($$, $5);
}
;
default_declaring_list:
declaration_qualifier_list identifier_declarator
{
init($$, ID_declaration);
parser_stack($$).type().swap(parser_stack($1));
PARSER.add_declarator(parser_stack($$), parser_stack($2));
}
initializer_opt
{
// patch on the initializer
$$=$3;
to_ansi_c_declaration(parser_stack($$)).add_initializer(parser_stack($4));
}
| type_qualifier_list identifier_declarator
{
init($$, ID_declaration);
parser_stack($$).type().swap(parser_stack($1));
PARSER.add_declarator(parser_stack($$), parser_stack($2));
}
initializer_opt
{
// patch on the initializer
$$=$3;
to_ansi_c_declaration(parser_stack($$)).add_initializer(parser_stack($4));
}
| default_declaring_list ',' identifier_declarator
{
// just add the declarator
PARSER.add_declarator(parser_stack($1), parser_stack($3));
// Needs to be done before initializer, as we want to see that identifier
// already there!
}
initializer_opt
{
// patch on the initializer
$$=$1;
to_ansi_c_declaration(parser_stack($$)).add_initializer(parser_stack($5));