rewrite parser with C Syntax BNF file

This commit is contained in:
Josh Holtrop 2018-05-07 23:21:25 -04:00
parent e7835b4fac
commit a7d63e51e5

View File

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