Московский сельдерей

%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 ELLIPSIS
 
%token CASE DEFAULT IF ELSE SWITCH WHILE DO FOR GOTO CONTINUE BREAK RETURN
 
%start translation_unit
%%
 
primary_expression
        : IDENTIFIER
        | CONSTANT
        | STRING_LITERAL
        | '(' expression ')'
        ;
 
postfix_expression
        : primary_expression
        | postfix_expression '[' expression ']'
        | postfix_expression '(' ')'
        | postfix_expression '(' argument_expression_list ')'
        | postfix_expression '.' IDENTIFIER
        | postfix_expression PTR_OP IDENTIFIER
        | postfix_expression INC_OP
        | postfix_expression DEC_OP
        ;
 
argument_expression_list
        : assignment_expression
        | argument_expression_list ',' assignment_expression
        ;
 
unary_expression
        : postfix_expression
        | INC_OP unary_expression
        | DEC_OP unary_expression
        | unary_operator cast_expression
        | SIZEOF unary_expression
        | SIZEOF '(' type_name ')'
        ;
 
unary_operator
        : '&'
        | '*'
        | '+'
        | '-'
        | '~'
        | '!'
        ;
 
cast_expression
        : unary_expression
        | '(' type_name ')' cast_expression
        ;
 
multiplicative_expression
        : cast_expression
        | multiplicative_expression '*' cast_expression
        | multiplicative_expression '/' cast_expression
        | multiplicative_expression '%' cast_expression
        ;
 
additive_expression
        : multiplicative_expression
        | additive_expression '+' multiplicative_expression
        | additive_expression '-' multiplicative_expression
        ;
 
shift_expression
        : additive_expression
        | shift_expression LEFT_OP additive_expression
        | shift_expression RIGHT_OP additive_expression
        ;
 
relational_expression
        : shift_expression
        | relational_expression '<' shift_expression
        | relational_expression '>' shift_expression
        | relational_expression LE_OP shift_expression
        | relational_expression GE_OP shift_expression
        ;
 
equality_expression
        : relational_expression
        | equality_expression EQ_OP relational_expression
        | equality_expression NE_OP relational_expression
        ;
 
and_expression
        : equality_expression
        | and_expression '&' equality_expression
        ;
 
exclusive_or_expression
        : and_expression
        | exclusive_or_expression '^' and_expression
        ;
 
inclusive_or_expression
        : exclusive_or_expression
        | inclusive_or_expression '|' exclusive_or_expression
        ;
 
logical_and_expression
        : inclusive_or_expression
        | logical_and_expression AND_OP inclusive_or_expression
        ;
 
logical_or_expression
        : logical_and_expression
        | logical_or_expression OR_OP logical_and_expression
        ;
 
conditional_expression
        : logical_or_expression
        | logical_or_expression '?' expression ':' conditional_expression
        ;
 
assignment_expression
        : conditional_expression
        | unary_expression assignment_operator assignment_expression
        ;
 
assignment_operator
        : '='
        | MUL_ASSIGN
        | DIV_ASSIGN
        | MOD_ASSIGN
        | ADD_ASSIGN
        | SUB_ASSIGN
        | LEFT_ASSIGN
        | RIGHT_ASSIGN
        | AND_ASSIGN
        | XOR_ASSIGN
        | OR_ASSIGN
        ;
 
expression
        : assignment_expression
        | expression ',' assignment_expression
        ;
 
constant_expression
        : conditional_expression
        ;
 
declaration
        : declaration_specifiers ';'
        | declaration_specifiers init_declarator_list ';'
        ;
 
declaration_specifiers
        : storage_class_specifier
        | storage_class_specifier declaration_specifiers
        | type_specifier
        | type_specifier declaration_specifiers
        | type_qualifier
        | type_qualifier 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
        : VOID
        | CHAR
        | SHORT
        | INT
        | LONG
        | FLOAT
        | DOUBLE
        | SIGNED
        | UNSIGNED
        | 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
        : specifier_qualifier_list struct_declarator_list ';'
        ;
 
specifier_qualifier_list
        : type_specifier specifier_qualifier_list
        | type_specifier
        | type_qualifier specifier_qualifier_list
        | type_qualifier
        ;
 
struct_declarator_list
        : struct_declarator
        | struct_declarator_list ',' struct_declarator
        ;
 
struct_declarator
        : declarator
        | ':' constant_expression
        | declarator ':' constant_expression
        ;
 
enum_specifier
        : ENUM '{' enumerator_list '}'
        | ENUM IDENTIFIER '{' enumerator_list '}'
        | ENUM IDENTIFIER
        ;
 
enumerator_list
        : enumerator
        | enumerator_list ',' enumerator
        ;
 
enumerator
        : IDENTIFIER
        | IDENTIFIER '=' constant_expression
        ;
 
type_qualifier
        : CONST
        | VOLATILE
        ;
 
declarator
        : pointer direct_declarator
        | direct_declarator
        ;
 
direct_declarator
        : IDENTIFIER
        | '(' declarator ')'
        | direct_declarator '[' constant_expression ']'
        | direct_declarator '[' ']'
        | direct_declarator '(' parameter_type_list ')'
        | direct_declarator '(' identifier_list ')'
        | direct_declarator '(' ')'
        ;
 
pointer
        : '*'
        | '*' type_qualifier_list
        | '*' pointer
        | '*' type_qualifier_list pointer
        ;
 
type_qualifier_list
        : type_qualifier
        | type_qualifier_list type_qualifier
        ;
 
 
parameter_type_list
        : parameter_list
        | parameter_list ',' ELLIPSIS
        ;
 
parameter_list
        : parameter_declaration
        | parameter_list ',' parameter_declaration
        ;
 
parameter_declaration
        : declaration_specifiers declarator
        | declaration_specifiers abstract_declarator
        | declaration_specifiers
        ;
 
identifier_list
        : IDENTIFIER
        | identifier_list ',' IDENTIFIER
        ;
 
type_name
        : specifier_qualifier_list
        | specifier_qualifier_list abstract_declarator
        ;
 
abstract_declarator
        : pointer
        | direct_abstract_declarator
        | pointer direct_abstract_declarator
        ;
 
direct_abstract_declarator
        : '(' abstract_declarator ')'
        | '[' ']'
        | '[' constant_expression ']'
        | direct_abstract_declarator '[' ']'
        | direct_abstract_declarator '[' constant_expression ']'
        | '(' ')'
        | '(' parameter_type_list ')'
        | direct_abstract_declarator '(' ')'
        | direct_abstract_declarator '(' parameter_type_list ')'
        ;
 
initializer
        : assignment_expression
        | '{' 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_expression ':' statement
        | DEFAULT ':' statement
        ;
 
compound_statement
        : '{' '}'
        | '{' statement_list '}'
        | '{' declaration_list '}'
        | '{' declaration_list statement_list '}'
        ;
 
declaration_list
        : declaration
        | declaration_list declaration
        ;
 
statement_list
        : statement
        | statement_list statement
        ;
 
expression_statement
        : ';'
        | expression ';'
        ;
 
selection_statement
        : IF '(' expression ')' statement
        | IF '(' expression ')' statement ELSE statement
        | SWITCH '(' expression ')' statement
        ;
 
iteration_statement
        : WHILE '(' expression ')' statement
        | DO statement WHILE '(' expression ')' ';'
        | FOR '(' expression_statement expression_statement ')' statement
        | FOR '(' expression_statement expression_statement expression ')' state
ment
        ;
 
jump_statement
        : GOTO IDENTIFIER ';'
        | CONTINUE ';'
        | BREAK ';'
        | RETURN ';'
        | RETURN expression ';'
        ;
 
translation_unit
        : external_declaration
        | translation_unit external_declaration
        ;
 
external_declaration
        : function_definition
        | declaration
        ;
 
function_definition
        : declaration_specifiers declarator declaration_list compound_statement
        | declaration_specifiers declarator compound_statement
        | declarator declaration_list compound_statement
        | declarator compound_statement
        ;
 
%%

#include <stdio.h>
 
extern char yytext[];
extern int column;
 
yyerror(s)
char *s;
{
        fflush(stdout);
        printf("\n%*s\n%*s\n", column, "^", column, s);
}