rewrite parser with C Syntax BNF file
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e7835b4fac
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a7d63e51e5
@ -112,103 +112,330 @@ int yylex(YYSTYPE *, YYLTYPE *);
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%%
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translation_unit: translation_unit_item
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| translation_unit translation_unit_item
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;
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translation_unit :
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| external_decl
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| translation_unit external_decl
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;
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translation_unit_item: declaration
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| function_definition
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;
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external_decl : function_definition
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| decl
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;
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declaration: type TOK_IDENTIFIER TOK_SEMICOLON
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| typedef_declaration
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;
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function_definition : decl_specs declarator decl_list compound_stat
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| declarator decl_list compound_stat
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| decl_specs declarator compound_stat
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| declarator compound_stat
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;
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typedef_declaration: TOK_TYPEDEF type TOK_IDENTIFIER TOK_SEMICOLON
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;
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decl : decl_specs init_declarator_list TOK_SEMICOLON
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| decl_specs TOK_SEMICOLON
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;
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type: TOK_VOID
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| opt_int_type_qualifiers int_type
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| opt_float_type_qualifiers float_type
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;
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decl_list : decl
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| decl_list decl
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;
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int_type: TOK_CHAR
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| TOK_SHORT
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| TOK_INT
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| TOK_LONG
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| TOK_LONG TOK_LONG
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;
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decl_specs : storage_class_spec decl_specs
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| storage_class_spec
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| type_spec decl_specs
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| type_spec
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| type_qualifier decl_specs
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| type_qualifier
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;
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float_type: TOK_FLOAT
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| TOK_DOUBLE
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;
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storage_class_spec : TOK_AUTO | TOK_REGISTER | TOK_STATIC | TOK_EXTERN | TOK_TYPEDEF
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;
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opt_int_type_qualifiers:
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| int_type_qualifiers
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;
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type_spec : TOK_VOID | TOK_CHAR | TOK_SHORT | TOK_INT | TOK_LONG | TOK_FLOAT
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| TOK_DOUBLE | TOK_SIGNED | TOK_UNSIGNED
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| struct_or_union_spec
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| enum_spec
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| typedef_name
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;
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int_type_qualifiers: int_type_qualifier
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| int_type_qualifiers int_type_qualifier
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;
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type_qualifier : TOK_CONST | TOK_VOLATILE
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;
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int_type_qualifier: TOK_VOLATILE
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| TOK_CONST
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| TOK_STATIC
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| TOK_EXTERN
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| TOK_SIGNED
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| TOK_UNSIGNED
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| TOK_SHORT
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| TOK_LONG
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;
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struct_or_union_spec : struct_or_union TOK_IDENTIFIER TOK_LCURLY struct_decl_list TOK_RCURLY
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| struct_or_union TOK_LCURLY struct_decl_list TOK_RCURLY
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| struct_or_union TOK_IDENTIFIER
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;
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opt_float_type_qualifiers:
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| float_type_qualifiers
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;
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struct_or_union : TOK_STRUCT | TOK_UNION
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;
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float_type_qualifiers: float_type_qualifier
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| float_type_qualifiers float_type_qualifier
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;
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struct_decl_list : struct_decl
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| struct_decl_list struct_decl
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;
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float_type_qualifier: TOK_VOLATILE
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| TOK_CONST
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| TOK_STATIC
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| TOK_EXTERN
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| TOK_LONG
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;
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init_declarator_list : init_declarator
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| init_declarator_list TOK_COMMA init_declarator
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;
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function_definition: function_header compound_statement
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;
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init_declarator : declarator
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| declarator TOK_ASSIGN initializer
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;
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function_header: type TOK_IDENTIFIER TOK_LPAREN opt_parameter_list TOK_RPAREN
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;
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struct_decl : spec_qualifier_list struct_declarator_list TOK_SEMICOLON
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;
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opt_parameter_list:
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| parameter_list
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;
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parameter_list: parameter
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| parameter_list TOK_COMMA parameter
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;
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spec_qualifier_list : type_spec spec_qualifier_list
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| type_spec
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| type_qualifier spec_qualifier_list
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| type_qualifier
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;
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parameter: type TOK_IDENTIFIER
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;
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struct_declarator_list : struct_declarator
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| struct_declarator_list TOK_COMMA struct_declarator
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;
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compound_statement: TOK_LBRACKET opt_statement_list TOK_RBRACKET
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;
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struct_declarator : declarator
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| declarator TOK_COLON const_exp
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| TOK_COLON const_exp
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;
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opt_statement_list:
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| statement_list
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;
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enum_spec : TOK_ENUM TOK_IDENTIFIER TOK_LCURLY enumerator_list TOK_RCURLY
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| TOK_ENUM TOK_LCURLY enumerator_list TOK_RCURLY
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| TOK_ENUM TOK_IDENTIFIER
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;
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statement_list: statement
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| statement_list statement
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;
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enumerator_list : enumerator
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| enumerator_list TOK_COMMA enumerator
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;
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statement: declaration
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| expression TOK_SEMICOLON
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;
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enumerator : TOK_IDENTIFIER
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| TOK_IDENTIFIER TOK_ASSIGN const_exp
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;
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expression: TOK_IDENTIFIER
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;
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declarator : pointer direct_declarator
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| direct_declarator
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;
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direct_declarator : TOK_IDENTIFIER
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| TOK_LPAREN declarator TOK_RPAREN
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| direct_declarator TOK_LBRACKET const_exp TOK_RBRACKET
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| direct_declarator TOK_LBRACKET TOK_RBRACKET
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| direct_declarator TOK_LPAREN param_type_list TOK_RPAREN
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| direct_declarator TOK_LPAREN id_list TOK_RPAREN
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| direct_declarator TOK_LPAREN TOK_RPAREN
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;
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pointer : TOK_TIMES type_qualifier_list
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| TOK_TIMES
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| TOK_TIMES type_qualifier_list pointer
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| TOK_TIMES pointer
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;
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type_qualifier_list : type_qualifier
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| type_qualifier_list type_qualifier
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;
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param_type_list : param_list
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| param_list TOK_COMMA TOK_ELLIPSES
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;
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param_list : param_decl
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| param_list TOK_COMMA param_decl
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;
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param_decl : decl_specs declarator
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| decl_specs abstract_declarator
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| decl_specs
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;
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id_list : TOK_IDENTIFIER
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| id_list TOK_COMMA TOK_IDENTIFIER
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;
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initializer : assignment_exp
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| TOK_LCURLY initializer_list TOK_RCURLY
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| TOK_LCURLY initializer_list TOK_COMMA TOK_RCURLY
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;
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initializer_list : initializer
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| initializer_list TOK_COMMA initializer
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;
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type_name : spec_qualifier_list abstract_declarator
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| spec_qualifier_list
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;
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abstract_declarator : pointer
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| pointer direct_abstract_declarator
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| direct_abstract_declarator
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;
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direct_abstract_declarator: TOK_LPAREN abstract_declarator TOK_RPAREN
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| direct_abstract_declarator TOK_LBRACKET const_exp TOK_RBRACKET
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| TOK_LBRACKET const_exp TOK_RBRACKET
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| direct_abstract_declarator TOK_LBRACKET TOK_RBRACKET
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| TOK_LBRACKET TOK_RBRACKET
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| direct_abstract_declarator TOK_LPAREN param_type_list TOK_RPAREN
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| TOK_LPAREN param_type_list TOK_RPAREN
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| direct_abstract_declarator TOK_LPAREN TOK_RPAREN
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| TOK_LPAREN TOK_RPAREN
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;
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typedef_name : TOK_IDENTIFIER
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;
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stat : labeled_stat
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| exp_stat
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| compound_stat
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| selection_stat
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| iteration_stat
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| jump_stat
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;
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labeled_stat : TOK_IDENTIFIER TOK_COLON stat
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| TOK_CASE const_exp TOK_COLON stat
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| TOK_DEFAULT TOK_COLON stat
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;
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exp_stat : exp TOK_SEMICOLON
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| TOK_SEMICOLON
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;
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compound_stat : TOK_LCURLY decl_list stat_list TOK_RCURLY
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| TOK_LCURLY stat_list TOK_RCURLY
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| TOK_LCURLY decl_list TOK_RCURLY
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| TOK_LCURLY TOK_RCURLY
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;
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stat_list : stat
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| stat_list stat
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;
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selection_stat : TOK_IF TOK_LPAREN exp TOK_RPAREN stat
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| TOK_IF TOK_LPAREN exp TOK_RPAREN stat TOK_ELSE stat
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| TOK_SWITCH TOK_LPAREN exp TOK_RPAREN stat
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;
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iteration_stat : TOK_WHILE TOK_LPAREN exp TOK_RPAREN stat
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| TOK_DO stat TOK_WHILE TOK_LPAREN exp TOK_RPAREN TOK_SEMICOLON
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| TOK_FOR TOK_LPAREN exp TOK_SEMICOLON exp TOK_SEMICOLON exp TOK_RPAREN stat
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| TOK_FOR TOK_LPAREN exp TOK_SEMICOLON exp TOK_SEMICOLON TOK_RPAREN stat
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| TOK_FOR TOK_LPAREN exp TOK_SEMICOLON TOK_SEMICOLON exp TOK_RPAREN stat
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| TOK_FOR TOK_LPAREN exp TOK_SEMICOLON TOK_SEMICOLON TOK_RPAREN stat
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| TOK_FOR TOK_LPAREN TOK_SEMICOLON exp TOK_SEMICOLON exp TOK_RPAREN stat
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| TOK_FOR TOK_LPAREN TOK_SEMICOLON exp TOK_SEMICOLON TOK_RPAREN stat
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| TOK_FOR TOK_LPAREN TOK_SEMICOLON TOK_SEMICOLON exp TOK_RPAREN stat
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| TOK_FOR TOK_LPAREN TOK_SEMICOLON TOK_SEMICOLON TOK_RPAREN stat
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;
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jump_stat : TOK_GOTO TOK_IDENTIFIER TOK_SEMICOLON
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| TOK_CONTINUE TOK_SEMICOLON
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| TOK_BREAK TOK_SEMICOLON
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| TOK_RETURN exp TOK_SEMICOLON
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| TOK_RETURN TOK_SEMICOLON
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;
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exp : assignment_exp
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| exp TOK_COMMA assignment_exp
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;
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assignment_exp : conditional_exp
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| unary_exp assignment_operator assignment_exp
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;
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assignment_operator : TOK_ASSIGN | TOK_TIMESEQUALS | TOK_DIVIDEEQUALS | TOK_MODEQUALS | TOK_PLUSEQUALS | TOK_MINUSEQUALS | TOK_LSHIFTEQUALS
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| TOK_RSHIFTEQUALS | TOK_BITANDEQUALS | TOK_XOREQUALS | TOK_BITOREQUALS
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;
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conditional_exp : logical_or_exp
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| logical_or_exp TOK_QUESTION exp TOK_COLON conditional_exp
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;
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const_exp : conditional_exp
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;
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logical_or_exp : logical_and_exp
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| logical_or_exp TOK_OR logical_and_exp
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;
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logical_and_exp : inclusive_or_exp
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| logical_and_exp TOK_AND inclusive_or_exp
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;
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inclusive_or_exp : exclusive_or_exp
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| inclusive_or_exp TOK_BITOR exclusive_or_exp
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;
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exclusive_or_exp : and_exp
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| exclusive_or_exp TOK_XOR and_exp
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;
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and_exp : equality_exp
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| and_exp TOK_BITAND equality_exp
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;
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equality_exp : relational_exp
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| equality_exp TOK_EQUALS relational_exp
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| equality_exp TOK_NOTEQUALS relational_exp
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;
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relational_exp : shift_expression
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| relational_exp TOK_LESS shift_expression
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| relational_exp TOK_GREATER shift_expression
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| relational_exp TOK_LESSEQ shift_expression
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| relational_exp TOK_GREATEREQ shift_expression
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;
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shift_expression : additive_exp
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| shift_expression TOK_LSHIFT additive_exp
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| shift_expression TOK_RSHIFT additive_exp
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;
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additive_exp : mult_exp
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| additive_exp TOK_PLUS mult_exp
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| additive_exp TOK_MINUS mult_exp
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;
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mult_exp : cast_exp
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| mult_exp TOK_TIMES cast_exp
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| mult_exp TOK_DIVIDE cast_exp
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| mult_exp TOK_MOD cast_exp
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;
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cast_exp : unary_exp
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| TOK_LPAREN type_name TOK_RPAREN cast_exp
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;
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unary_exp : postfix_exp
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| TOK_INCREMENT unary_exp
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| TOK_DECREMENT unary_exp
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| unary_operator cast_exp
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| TOK_SIZEOF unary_exp
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| TOK_SIZEOF TOK_LPAREN type_name TOK_RPAREN
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;
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unary_operator : TOK_BITAND | TOK_TIMES | TOK_PLUS | TOK_MINUS | TOK_BITNOT | TOK_NOT
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;
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postfix_exp : primary_exp
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| postfix_exp TOK_LBRACKET exp TOK_RBRACKET
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| postfix_exp TOK_LPAREN argument_exp_list TOK_RPAREN
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| postfix_exp TOK_LPAREN TOK_RPAREN
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| postfix_exp TOK_DOT TOK_IDENTIFIER
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| postfix_exp TOK_ARROW TOK_IDENTIFIER
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| postfix_exp TOK_INCREMENT
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| postfix_exp TOK_DECREMENT
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;
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primary_exp : const
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| TOK_STR_CONST
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| TOK_LPAREN exp TOK_RPAREN
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;
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argument_exp_list : assignment_exp
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| argument_exp_list TOK_COMMA assignment_exp
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;
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const : TOK_INT_CONST
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| TOK_CHAR_CONST
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| TOK_FLOAT_CONST
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| TOK_IDENTIFIER
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;
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%%
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