diff options
Diffstat (limited to 'cibic.y')
| -rw-r--r-- | cibic.y | 401 |
1 files changed, 401 insertions, 0 deletions
@@ -0,0 +1,401 @@ +%{ +#include <stdio.h> +#include <stdlib.h> +#include "ast.h" +#include "semantics.h" +%} +%union { + int intval; + char *strval; + struct CNode *cnode; +} +%error-verbose +%token IDENTIFIER "identifier" INT_CONST "integer constant" CHAR_CONST "character constant" STR_CONST "string constant" USER_TYPE "typedef name" +%token KW_VOID "void" KW_CHAR "char" KW_INT "int" KW_STRUCT "struct" KW_UNION "union" KW_IF "if" KW_ELSE "else" KW_WHILE "while" KW_TYPEDEF "typedef" +%token KW_FOR "for" KW_CONT "continue" KW_BREAK "break" KW_RET "ret" KW_SIZEOF "sizeof" +%token OPT_OR "||" OPT_AND "&&" OPT_EQ "==" OPT_NE "!=" OPT_LE "<=" OPT_GE ">=" OPT_SHL "<<" OPT_SHR ">>" OPT_INC "++" OPT_DEC "--" OPT_PTR "->" +%token ASS_MUL "*=" ASS_DIV "/=" ASS_MOD "%=" ASS_ADD "+=" ASS_SUB "-=" ASS_SHL "<<=" ASS_SHR ">>=" ASS_AND "&=" ASS_XOR "^=" ASS_OR "|=" +%token UNKNOWN "stray character" +%token END 0 "end of file" +%type<intval> INT_CONST +%type<strval> IDENTIFIER STR_CONST CHAR_CONST USER_TYPE +%type<intval> additive_operator assignment_operator equality_operator multiplicative_operator relational_operator shift_operator struct_or_union unary_operator +%type<cnode> additive_expression and_expression arguments array_initializer assignment_expression cast_expression comp_decls compound_statement comp_stmts constant_expression declaration declarator declarators equality_expression exclusive_or_expression expression expression_statement function_definition identifier inclusive_or_expression init_declarator init_declarators initializer iteration_statement jump_statement logical_and_expression logical_or_expression multiplicative_expression optional_exp parameters plain_declaration direct_declarator postfix postfix_expression primary_expression prog_list program relational_expression selection_statement shift_expression statement struct_field struct_fields type_name type_specifier unary_expression abstract_declarator direct_abstract_declarator direct_abstract_declarator_opt abstract_declarator_opt user_type +%start program +%% +program + : prog_list { ast_root = cnode_create_ast(cnode_list_wrap(PROG, $1)); } + +prog_list + : declaration + | function_definition + | prog_list declaration { $$ = cnode_list_append($1, $2); } + | prog_list function_definition { $$ = cnode_list_append($1, $2); } + +declaration + : KW_TYPEDEF type_specifier { def_exit(); def_enter(IN_TYPEDEF); } declarators ';' { + $$ = cnode_add_loc(cnode_create_typedef( + $2, + cnode_add_loc(cnode_list_wrap(DECLRS, $4), @4)), @$); + def_exit(); + } + | type_specifier ';' { + $$ = cnode_add_loc(cnode_create_decl( + $1, + cnode_list_wrap(INIT_DECLRS, cnode_create_nop())), @$); + def_exit(); + } + | type_specifier init_declarators ';' { + $$ = cnode_add_loc(cnode_create_decl( + $1, + cnode_add_loc(cnode_list_wrap(INIT_DECLRS, $2), @2)), @$); + def_exit(); + } + +function_definition + : type_specifier declarator { def_exit(); } compound_statement { + $$ = cnode_add_loc(cnode_create_func($1, $2, $4), @$); + } + +parameters + : { $$ = NULL; } + | plain_declaration + | parameters ',' plain_declaration { $$ = cnode_list_append($1, $3); } + +declarators + : declarator + | declarators ',' declarator { $$ = cnode_list_append($1, $3); } + +init_declarators + : init_declarator + | init_declarators ',' init_declarator { $$ = cnode_list_append($1, $3); } + +init_declarator + : declarator { $$ = cnode_add_loc(cnode_create_init_declr($1, cnode_create_nop()), @$); } + | declarator { def_exit(); } '=' initializer { + $$ = cnode_add_loc(cnode_create_init_declr($1, $4), @$); + def_enter(FORCE_ID); + } + +initializer + : assignment_expression { $$ = cnode_add_loc(cnode_create_initr(INITR_NORM, $1), @$); } + | '{' array_initializer '}' { $$ = cnode_add_loc(cnode_create_initr(INITR_ARR, $2), @$); } + +array_initializer + : initializer + | array_initializer ',' initializer { + $$ = cnode_list_append(cnode_add_loc($1, @1), $3); } + +type_specifier + : KW_VOID { $$ = cnode_add_loc(cnode_create_type_spec(KW_VOID, 0), @$); def_enter(FORCE_ID); } + | KW_CHAR { $$ = cnode_add_loc(cnode_create_type_spec(KW_CHAR, 0), @$); def_enter(FORCE_ID); } + | KW_INT { $$ = cnode_add_loc(cnode_create_type_spec(KW_INT, 0), @$); def_enter(FORCE_ID); } + | struct_or_union identifier {def_exit(); }'{' struct_fields '}' { + $$ = cnode_add_loc(cnode_create_type_spec($1, 2, $2, cnode_add_loc(cnode_list_wrap(FIELDS, $5), @5)), @$); + def_enter(FORCE_ID); + } + | struct_or_union {def_exit(); }'{' struct_fields '}' { + $$ = cnode_add_loc(cnode_create_type_spec($1, 2, cnode_create_nop(), cnode_add_loc(cnode_list_wrap(FIELDS, $4), @4)), @$); + def_enter(FORCE_ID); + } + | struct_or_union identifier { + $$ = cnode_add_loc(cnode_create_type_spec($1, 2, $2, cnode_create_nop()), @$); + def_exit(); + def_enter(FORCE_ID); + } + | user_type { $$ = cnode_add_loc(cnode_create_type_spec(USER_TYPE, 1, $1), @$); def_enter(FORCE_ID); } + +user_type + : USER_TYPE { $$ = cnode_add_loc(cnode_create_identifier($1), @$); } + +struct_fields + : struct_field + | struct_fields struct_field { $$ = cnode_list_append($1, $2); } +struct_field + : type_specifier declarators ';' { + $$ = cnode_add_loc( + cnode_create_struct_field( + $1, + cnode_add_loc(cnode_list_wrap(DECLRS, $2), @2)), @$); + def_exit(); + } + +struct_or_union + : KW_STRUCT { $$ = KW_STRUCT; def_enter(FORCE_ID); } + | KW_UNION { $$ = KW_UNION; def_enter(FORCE_ID); } + +plain_declaration + : type_specifier declarator { + $$ = cnode_add_loc(cnode_create_plain_decl($1, $2), @$); + def_exit(); + } + +direct_declarator + : identifier { push($1->rec.strval); } + | '(' declarator ')' { $$ = $2; } + | direct_declarator { def_enter(NONE); } '(' parameters ')' { + $$ = cnode_add_loc(cnode_create_declr( + DECLR_FUNC, 2, $1, + cnode_add_loc(cnode_list_wrap(PARAMS, $4), @4)), @$); + def_exit(); + } + | direct_declarator '[' constant_expression ']' { + $$ = cnode_add_loc(cnode_create_declr(DECLR_ARR, 2, $1, $3), @$); + } + +declarator + : direct_declarator + | '*' declarator { + $$ = cnode_add_loc(cnode_create_declr('*', 1, $2), @$); } + +statement + : expression_statement + | compound_statement + | selection_statement + | iteration_statement + | jump_statement + +expression_statement + : ';' { $$ = cnode_add_loc(cnode_create_stmt(STMT_EXP, 1, cnode_create_nop()), @$); } + | expression ';' { $$ = cnode_add_loc(cnode_create_stmt(STMT_EXP, 1, $1), @$); } + +compound_statement + : { block_enter(); } '{' comp_decls comp_stmts '}' { + $$ = cnode_add_loc( + cnode_create_stmt(STMT_COMP, 2, cnode_add_loc(cnode_list_wrap(COMP_DECLS, $3), @3), + cnode_add_loc(cnode_list_wrap(COMP_STMTS, $4), @4)), @$); + block_exit(); + } + +comp_decls + : { $$ = cnode_create_nop(); } + | comp_decls declaration { $$ = cnode_list_append($1, $2); } + +comp_stmts + : { $$ = cnode_create_nop(); } + | comp_stmts statement { $$ = cnode_list_append($1, $2); } + +selection_statement + : KW_IF '(' expression ')' statement { + $$ = cnode_add_loc( + cnode_create_stmt(STMT_IF, 3, $3, $5, cnode_create_nop()), @$); + } + | KW_IF '(' expression ')' statement KW_ELSE statement { + $$ = cnode_add_loc( + cnode_create_stmt(STMT_IF, 3, $3, $5, $7), @$); + } + +iteration_statement + : KW_WHILE '(' expression ')' statement { + $$ = cnode_add_loc(cnode_create_stmt(STMT_WHILE, 2, $3, $5), @$); + } + | KW_FOR '(' optional_exp ';' optional_exp ';' optional_exp ')' statement { + $$ = cnode_add_loc(cnode_create_stmt(STMT_FOR, 4, $3, $5, $7, $9), @$); + } + +optional_exp + : { $$ = cnode_create_nop(); } + | expression + +jump_statement + : KW_CONT ';' { $$ = cnode_add_loc(cnode_create_stmt(STMT_CONT, 0), @$); } + | KW_BREAK ';' { $$ = cnode_add_loc(cnode_create_stmt(STMT_BREAK, 0), @$); } + | KW_RET optional_exp ';' { $$ = cnode_add_loc(cnode_create_stmt(STMT_RET, 1, $2), @$); } + +expression + : assignment_expression + | expression ',' assignment_expression { + @$ = @2; + $$ = cnode_add_loc(cnode_create_exp(',', 2, $1, $3), @2); } + +assignment_expression + : logical_or_expression + | unary_expression assignment_operator assignment_expression { + @$ = @2; + $$ = cnode_add_loc(cnode_create_exp($2, 2, $1, $3), @2); } + +assignment_operator + : '=' { $$ = '='; } + | ASS_MUL { $$ = ASS_MUL; } + | ASS_DIV { $$ = ASS_DIV; } + | ASS_MOD { $$ = ASS_MOD; } + | ASS_ADD { $$ = ASS_ADD; } + | ASS_SUB { $$ = ASS_SUB; } + | ASS_SHL { $$ = ASS_SHL; } + | ASS_SHR { $$ = ASS_SHR; } + | ASS_AND { $$ = ASS_AND; } + | ASS_XOR { $$ = ASS_XOR; } + | ASS_OR { $$ = ASS_OR; } + +constant_expression: logical_or_expression +logical_or_expression + : logical_and_expression + | logical_or_expression OPT_OR logical_and_expression { + @$ = @2; + $$ = cnode_add_loc(cnode_create_exp(OPT_OR, 2, $1, $3), @2); } + +logical_and_expression + : inclusive_or_expression + | logical_and_expression OPT_AND inclusive_or_expression { + @$ = @2; + $$ = cnode_add_loc(cnode_create_exp(OPT_AND, 2, $1, $3), @2); } + +inclusive_or_expression + : exclusive_or_expression + | inclusive_or_expression '|' exclusive_or_expression { + @$ = @2; + $$ = cnode_add_loc(cnode_create_exp('|', 2, $1, $3), @2); } + +exclusive_or_expression + : and_expression + | exclusive_or_expression '^' and_expression { + @$ = @2; + $$ = cnode_add_loc(cnode_create_exp('^', 2, $1, $3), @2); } + +and_expression + : equality_expression + | and_expression '&' equality_expression { + @$ = @2; + $$ = cnode_add_loc(cnode_create_exp('&', 2, $1, $3), @2); } + +equality_expression + : relational_expression + | equality_expression equality_operator relational_expression { + @$ = @2; + $$ = cnode_add_loc(cnode_create_exp($2, 2, $1, $3), @2); } + +equality_operator + : OPT_EQ { $$ = OPT_EQ; } + | OPT_NE { $$ = OPT_NE; } + +relational_expression + : shift_expression + | relational_expression relational_operator shift_expression { + @$ = @2; + $$ = cnode_add_loc(cnode_create_exp($2, 2, $1, $3), @2); } + +relational_operator + : '<' { $$ = '<'; } + | '>' { $$ = '>'; } + | OPT_LE { $$ = OPT_LE; } + | OPT_GE { $$ = OPT_GE; } + +shift_expression + : additive_expression + | shift_expression shift_operator additive_expression { + @$ = @2; + $$ = cnode_add_loc(cnode_create_exp($2, 2, $1, $3), @2); } + +shift_operator + : OPT_SHL { $$ = OPT_SHL; } + | OPT_SHR { $$ = OPT_SHR; } + +additive_expression + : multiplicative_expression + | additive_expression additive_operator multiplicative_expression { + @$ = @2; + $$ = cnode_add_loc(cnode_create_exp($2, 2, $1, $3), @2); } + +additive_operator + : '+' { $$ = '+'; } + | '-' { $$ = '-'; } + +multiplicative_expression + : cast_expression + | multiplicative_expression multiplicative_operator cast_expression { + @$ = @2; + $$ = cnode_add_loc(cnode_create_exp($2, 2, $1, $3), @2); } + +multiplicative_operator + : '*' { $$ = '*'; } + | '/' { $$ = '/'; } + | '%' { $$ = '%'; } + +cast_expression + : unary_expression + | '(' type_name ')' cast_expression { + $$ = cnode_add_loc(cnode_create_exp(EXP_CAST, 2, $2, $4), @$); } + +type_name + : type_specifier abstract_declarator_opt { + $$ = cnode_add_loc(cnode_create_declr(0, 2, $1, $2), @$); + def_exit(); + } + +abstract_declarator_opt + : { $$ = cnode_create_nop(); } + | abstract_declarator + +abstract_declarator + : '*' { $$ = cnode_add_loc(cnode_create_declr('*', 1, cnode_create_nop()), @$); } + | '*' abstract_declarator { $$ = cnode_add_loc(cnode_create_declr('*', 1, $2), @$); } + | direct_abstract_declarator + +direct_abstract_declarator_opt + : { $$ = cnode_create_nop(); } + | direct_abstract_declarator + +direct_abstract_declarator + : '(' abstract_declarator ')' { $$ = $2; } + | direct_abstract_declarator '(' parameters ')' { + $$ = cnode_add_loc(cnode_create_declr( + DECLR_FUNC, 2, $1, + cnode_add_loc(cnode_list_wrap(PARAMS, $3), @3)), @$); + } + | '(' parameters ')' { + $$ = cnode_add_loc(cnode_create_declr( + DECLR_FUNC, 2, cnode_create_nop(), + cnode_add_loc(cnode_list_wrap(PARAMS, $2), @2)), @$); + } + | direct_abstract_declarator_opt '[' constant_expression ']' { + $$ = cnode_add_loc(cnode_create_declr(DECLR_ARR, 2, $1, $3), @$); + } + +unary_expression + : postfix_expression + | OPT_INC unary_expression { $$ = cnode_add_loc(cnode_create_exp(OPT_INC, 1, $2), @$); } + | OPT_DEC unary_expression { $$ = cnode_add_loc(cnode_create_exp(OPT_DEC, 1, $2), @$); } + | unary_operator cast_expression { $$ = cnode_add_loc(cnode_create_exp($1, 1, $2), @$); } + | KW_SIZEOF unary_expression { $$ = cnode_add_loc(cnode_create_exp(KW_SIZEOF, 1, $2), @$); } + | KW_SIZEOF '(' type_name ')' { $$ = cnode_add_loc(cnode_create_exp(KW_SIZEOF, 1, $3), @$); } + +unary_operator + : '&' { $$ = '&'; } + | '*' { $$ = '*'; } + | '+' { $$ = '+'; } + | '-' { $$ = '-'; } + | '~' { $$ = '~'; } + | '!' { $$ = '!'; } + +postfix_expression + : primary_expression + | postfix_expression postfix { + @$ = @2; + $$ = cnode_add_loc(cnode_create_exp(EXP_POSTFIX, 2, $1, $2), @2); } + +postfix + : '[' expression ']' { $$ = cnode_add_loc(cnode_create_exp(POSTFIX_ARR, 1, $2), @$); } + | '(' arguments ')' { + $$ = cnode_add_loc(cnode_create_exp( + POSTFIX_CALL, 1, + cnode_add_loc(cnode_list_wrap(ARGS, $2), @2)), @$); } + | '.' identifier { $$ = cnode_add_loc(cnode_create_exp(POSTFIX_DOT, 1, $2), @$); } + | OPT_PTR identifier { $$ = cnode_add_loc(cnode_create_exp(POSTFIX_PTR, 1, $2), @$); } + | OPT_INC { $$ = cnode_add_loc(cnode_create_exp(OPT_INC, 0), @$); } + | OPT_DEC { $$ = cnode_add_loc(cnode_create_exp(OPT_DEC, 0), @$); } + +arguments + : { $$ = NULL; } + | assignment_expression + | arguments ',' assignment_expression { $$ = cnode_list_append($1, $3); } + +primary_expression + : identifier + | INT_CONST { $$ = cnode_add_loc(cnode_create_int_const($1), @$); } + | CHAR_CONST { $$ = cnode_add_loc(cnode_create_char_const($1), @$); } + | STR_CONST { $$ = cnode_add_loc(cnode_create_str_const($1), @$); } + | '(' expression ')' { $$ = cnode_add_loc($2, @$); } + +identifier + : IDENTIFIER { $$ = cnode_add_loc(cnode_create_identifier($1), @$); } +%% |