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%token IDENTIFIER CONSTANT STRING_LITERAL SIZEOF
%token PTR_OP INC_OP DEC_OP LEFT_OP RIGHT_OP LE_OP GE_OP EQ_OP NE_OP
%token AND_OP OR_OP MUL_ASSIGN DIV_ASSIGN MOD_ASSIGN ADD_ASSIGN
%token SUB_ASSIGN LEFT_ASSIGN RIGHT_ASSIGN AND_ASSIGN
%token XOR_ASSIGN OR_ASSIGN TYPE_NAME
%token TYPEDEF EXTERN STATIC AUTO REGISTER
%token CHAR SHORT INT LONG SIGNED UNSIGNED FLOAT DOUBLE CONST VOLATILE VOID
%token STRUCT UNION ENUM ELIPSIS RANGE
%token CASE DEFAULT IF ELSE SWITCH WHILE DO FOR GOTO CONTINUE BREAK RETURN
%token UNSIGNED_CHAR
%token UNSIGNED_INT
%token TYPEDEF_CHAR
%token TYPEDEF_INT
%start code
%%
primary_expr
: identifier
| CONSTANT
| STRING_LITERAL
| '(' expr ')'
;
postfix_expr
: primary_expr
| postfix_expr '[' expr ']'
| postfix_expr '(' ')'
| postfix_expr '(' argument_expr_list ')'
| postfix_expr '.' identifier
| postfix_expr PTR_OP identifier
| postfix_expr INC_OP
| postfix_expr DEC_OP
;
argument_expr_list
: assignment_expr
| argument_expr_list ',' assignment_expr
;
unary_expr
: postfix_expr
| INC_OP unary_expr
| DEC_OP unary_expr
| unary_operator cast_expr
| SIZEOF unary_expr
| SIZEOF '(' type_name ')'
;
unary_operator
: '&'
| '*'
| '+'
| '-'
| '~'
| '!'
;
cast_expr
: unary_expr
| '(' type_name ')' cast_expr
;
multiplicative_expr
: cast_expr
| multiplicative_expr '*' cast_expr
| multiplicative_expr '/' cast_expr
| multiplicative_expr '%' cast_expr
;
additive_expr
: multiplicative_expr
| additive_expr '+' multiplicative_expr
| additive_expr '-' multiplicative_expr
;
shift_expr
: additive_expr
| shift_expr LEFT_OP additive_expr
| shift_expr RIGHT_OP additive_expr
;
relational_expr
: shift_expr
| relational_expr '<' shift_expr
| relational_expr '>' shift_expr
| relational_expr LE_OP shift_expr
| relational_expr GE_OP shift_expr
;
equality_expr
: relational_expr
| equality_expr EQ_OP relational_expr
| equality_expr NE_OP relational_expr
;
and_expr
: equality_expr
| and_expr '&' equality_expr
;
exclusive_or_expr
: and_expr
| exclusive_or_expr '^' and_expr
;
inclusive_or_expr
: exclusive_or_expr
| inclusive_or_expr '|' exclusive_or_expr
;
logical_and_expr
: inclusive_or_expr
| logical_and_expr AND_OP inclusive_or_expr
;
logical_or_expr
: logical_and_expr
| logical_or_expr OR_OP logical_and_expr
;
conditional_expr
: logical_or_expr
| logical_or_expr '?' logical_or_expr ':' conditional_expr
;
assignment_expr
: conditional_expr
| unary_expr assignment_operator assignment_expr
;
assignment_operator
: '='
| MUL_ASSIGN
| DIV_ASSIGN
| MOD_ASSIGN
| ADD_ASSIGN
| SUB_ASSIGN
| LEFT_ASSIGN
| RIGHT_ASSIGN
| AND_ASSIGN
| XOR_ASSIGN
| OR_ASSIGN
;
expr
: assignment_expr
| expr ',' assignment_expr
;
constant_expr
: conditional_expr
;
declaration
: declaration_specifiers ';'
| declaration_specifiers init_declarator_list ';'
;
declaration_specifiers
: storage_class_specifier
| storage_class_specifier declaration_specifiers
| type_specifier
| type_specifier declaration_specifiers
;
init_declarator_list
: init_declarator
| init_declarator_list ',' init_declarator
;
init_declarator
: declarator
| declarator '=' initializer
;
storage_class_specifier
: TYPEDEF
| EXTERN
| STATIC
| AUTO
| REGISTER
;
type_specifier
: CHAR
| SHORT
| INT
| LONG
| SIGNED
| UNSIGNED
| FLOAT
| DOUBLE
| CONST
| VOLATILE
| VOID
| struct_or_union_specifier
| enum_specifier
| TYPE_NAME
;
struct_or_union_specifier
: struct_or_union identifier '{' struct_declaration_list '}'
| struct_or_union '{' struct_declaration_list '}'
| struct_or_union identifier
;
struct_or_union
: STRUCT
| UNION
;
struct_declaration_list
: struct_declaration
| struct_declaration_list struct_declaration
;
struct_declaration
: type_specifier_list struct_declarator_list ';'
;
struct_declarator_list
: struct_declarator
| struct_declarator_list ',' struct_declarator
;
struct_declarator
: declarator
| ':' constant_expr
| declarator ':' constant_expr
;
enum_specifier
: ENUM '{' enumerator_list '}'
| ENUM identifier '{' enumerator_list '}'
| ENUM identifier
;
enumerator_list
: enumerator
| enumerator_list ',' enumerator
;
enumerator
: identifier
| identifier '=' constant_expr
;
declarator
: declarator2
| pointer declarator2
;
declarator2
: identifier
| '(' declarator ')'
| declarator2 '[' ']'
| declarator2 '[' constant_expr ']'
| declarator2 '(' ')'
| declarator2 '(' parameter_type_list ')'
| declarator2 '(' parameter_identifier_list ')'
;
pointer
: '*'
| '*' type_specifier_list
| '*' pointer
| '*' type_specifier_list pointer
;
type_specifier_list
: type_specifier
| type_specifier_list type_specifier
;
parameter_identifier_list
: identifier_list
| identifier_list ',' ELIPSIS
;
identifier_list
: identifier
| identifier_list ',' identifier
;
parameter_type_list
: parameter_list
| parameter_list ',' ELIPSIS
;
parameter_list
: parameter_declaration
| parameter_list ',' parameter_declaration
;
parameter_declaration
: type_specifier_list declarator
| type_name
;
type_name
: type_specifier_list
| type_specifier_list abstract_declarator
;
abstract_declarator
: pointer
| abstract_declarator2
| pointer abstract_declarator2
;
abstract_declarator2
: '(' abstract_declarator ')'
| '[' ']'
| '[' constant_expr ']'
| abstract_declarator2 '[' ']'
| abstract_declarator2 '[' constant_expr ']'
| '(' ')'
| '(' parameter_type_list ')'
| abstract_declarator2 '(' ')'
| abstract_declarator2 '(' parameter_type_list ')'
;
initializer
: assignment_expr
| '{' initializer_list '}'
| '{' initializer_list ',' '}'
;
initializer_list
: initializer
| initializer_list ',' initializer
;
statement
: labeled_statement
| compound_statement
| expression_statement
| selection_statement
| iteration_statement
| jump_statement
;
labeled_statement
: identifier ':' statement
| CASE constant_expr ':' statement
| DEFAULT ':' statement
;
left_bracket
: '{'
;
right_bracket
: '}'
;
compound_statement
: left_bracket right_bracket
| left_bracket statement_list right_bracket
| left_bracket declaration_list right_bracket
| left_bracket declaration_list statement_list right_bracket
;
declaration_list
: declaration
| declaration_list declaration
;
statement_list
: statement
| statement_list statement
;
expression_statement
: ';'
| expr ';'
;
selection_statement
: IF '(' expr ')' statement
| IF '(' expr ')' statement ELSE statement
| SWITCH '(' expr ')' statement
;
iteration_statement
: WHILE '(' expr ')' statement
| DO statement WHILE '(' expr ')' ';'
| FOR '(' ';' ';' ')' statement
| FOR '(' ';' ';' expr ')' statement
| FOR '(' ';' expr ';' ')' statement
| FOR '(' ';' expr ';' expr ')' statement
| FOR '(' expr ';' ';' ')' statement
| FOR '(' expr ';' ';' expr ')' statement
| FOR '(' expr ';' expr ';' ')' statement
| FOR '(' expr ';' expr ';' expr ')' statement
;
jump_statement
: GOTO identifier ';'
| CONTINUE ';'
| BREAK ';'
| RETURN ';'
| RETURN expr ';'
;
code
: file
;
file
: external_definition
| file external_definition
;
external_definition
: function_definition
| declaration
;
function_definition
: declarator function_body
| declaration_specifiers declarator function_body
;
function_body
: compound_statement
| declaration_list compound_statement
;
identifier
: IDENTIFIER
;