Rémi Bernon : widl: Use explicit %empty token for empty rules.
Module: wine Branch: master Commit: 3384e7cb632599e8b7581e86ab33307f6ef180a7 URL: https://gitlab.winehq.org/wine/wine/-/commit/3384e7cb632599e8b7581e86ab33307... Author: Rémi Bernon <rbernon(a)codeweavers.com> Date: Tue Jan 24 22:19:45 2023 +0100 widl: Use explicit %empty token for empty rules. --- tools/widl/parser.y | 89 ++++++++++++++++++++++++++++++++++++----------------- 1 file changed, 60 insertions(+), 29 deletions(-) diff --git a/tools/widl/parser.y b/tools/widl/parser.y index c483eb06ff0..73ff249a993 100644 --- a/tools/widl/parser.y +++ b/tools/widl/parser.y @@ -366,9 +366,13 @@ input: gbl_statements m_acf { $1 = append_parameterized_type_stmts($1); } ; -m_acf: /* empty */ | aACF acf_statements +m_acf + : %empty + | aACF acf_statements + ; -decl_statements: { $$ = NULL; } +decl_statements + : %empty { $$ = NULL; } | decl_statements tINTERFACE qualified_type '<' parameterized_type_args '>' ';' { parameterized_type_stmts = append_statement(parameterized_type_stmts, make_statement_parameterized_type($3, $5)); $$ = append_statement($1, make_statement_reference(type_parameterized_type_specialize_declare($3, $5))); @@ -376,15 +380,18 @@ decl_statements: { $$ = NULL; } ; decl_block: tDECLARE '{' decl_statements '}' { $$ = $3; } + ; -imp_decl_statements: { $$ = NULL; } +imp_decl_statements + : %empty { $$ = NULL; } | imp_decl_statements tINTERFACE qualified_type '<' parameterized_type_args '>' ';' { $$ = append_statement($1, make_statement_reference(type_parameterized_type_specialize_declare($3, $5))); } ; imp_decl_block: tDECLARE '{' imp_decl_statements '}' { $$ = $3; } -gbl_statements: { $$ = NULL; } +gbl_statements + : %empty { $$ = NULL; } | gbl_statements namespacedef '{' { push_namespaces($2); } gbl_statements '}' { pop_namespaces($2); $$ = append_statements($1, $5); } | gbl_statements interface ';' { $$ = append_statement($1, make_statement_reference($2)); } @@ -409,7 +416,8 @@ gbl_statements: { $$ = NULL; } | gbl_statements decl_block { $$ = append_statements($1, $2); } ; -imp_statements: { $$ = NULL; } +imp_statements + : %empty { $$ = NULL; } | imp_statements interface ';' { $$ = append_statement($1, make_statement_reference($2)); } | imp_statements dispinterface ';' { $$ = append_statement($1, make_statement_reference($2)); } | imp_statements namespacedef '{' { push_namespaces($2); } imp_statements '}' @@ -433,11 +441,13 @@ imp_statements: { $$ = NULL; } | imp_statements imp_decl_block { $$ = append_statements($1, $2); } ; -int_statements: { $$ = NULL; } +int_statements + : %empty { $$ = NULL; } | int_statements statement { $$ = append_statement($1, $2); } ; -semicolon_opt: +semicolon_opt + : %empty | ';' ; @@ -512,7 +522,8 @@ librarydef: library_start imp_statements '}' semicolon_opt { $$ = $1; $$->stmts = $2; } ; -m_args: { $$ = NULL; } +m_args + : %empty { $$ = NULL; } | args ; @@ -545,7 +556,8 @@ array: '[' expr ']' { $$ = $2; | '[' ']' { $$ = make_expr(EXPR_VOID); } ; -m_attributes: { $$ = NULL; } +m_attributes + : %empty { $$ = NULL; } | attributes ; @@ -590,8 +602,10 @@ activatable_attr: $$ = make_exprt(EXPR_MEMBER, declare_var(NULL, $1, make_declarator(NULL), 0), $3); } | contract_req { $$ = $1; } /* activatable on the default activation factory */ + ; -attribute: { $$ = NULL; } +attribute + : %empty { $$ = NULL; } | tACTIVATABLE '(' activatable_attr ')' { $$ = make_attrp(ATTR_ACTIVATABLE, $3); } | tAGGREGATABLE { $$ = make_attr(ATTR_AGGREGATABLE); } | tANNOTATION '(' aSTRING ')' { $$ = make_attrp(ATTR_ANNOTATION, $3); } @@ -723,7 +737,8 @@ callconv: tCDECL { $$ = xstrdup("__cdecl"); } | tSTDCALL { $$ = xstrdup("__stdcall"); } ; -cases: { $$ = NULL; } +cases + : %empty { $$ = NULL; } | cases case { $$ = append_var( $1, $2 ); } ; @@ -737,7 +752,8 @@ case: tCASE expr_int_const ':' union_field { attr_t *a = make_attrp(ATTR_CASE, } ; -enums: { $$ = NULL; } +enums + : %empty { $$ = NULL; } | enum_list ',' { $$ = $1; } | enum_list ; @@ -779,7 +795,8 @@ m_exprs: m_expr { $$ = append_expr( NULL, $1 ); | m_exprs ',' m_expr { $$ = append_expr( $1, $3 ); } ; -m_expr: { $$ = make_expr(EXPR_VOID); } +m_expr + : %empty { $$ = make_expr(EXPR_VOID); } | expr ; @@ -844,7 +861,8 @@ expr_const: expr { $$ = $1; } ; -fields: { $$ = NULL; } +fields + : %empty { $$ = NULL; } | fields field { $$ = append_var_list($1, $2); } ; @@ -864,7 +882,8 @@ ne_union_field: | attributes ';' { $$ = make_var(NULL); $$->attrs = $1; } ; -ne_union_fields: { $$ = NULL; } +ne_union_fields + : %empty { $$ = NULL; } | ne_union_fields ne_union_field { $$ = append_var( $1, $2 ); } ; @@ -900,11 +919,13 @@ declaration: } ; -m_ident: { $$ = NULL; } +m_ident + : %empty { $$ = NULL; } | ident ; -m_typename: { $$ = NULL; } +m_typename + : %empty { $$ = NULL; } | typename ; @@ -928,7 +949,8 @@ base_type: tBYTE { $$ = find_type_or_error(NULL, $<str>1); } | tHANDLET { $$ = find_type_or_error(NULL, $<str>1); } ; -m_int: +m_int + : %empty | tINT ; @@ -996,7 +1018,8 @@ namespacedef: tNAMESPACE aIDENTIFIER { $$ = append_str( NULL, $2 ); } | namespacedef '.' aIDENTIFIER { $$ = append_str( $1, $3 ); } ; -class_interfaces: { $$ = NULL; } +class_interfaces + : %empty { $$ = NULL; } | class_interfaces class_interface { $$ = append_typeref( $1, $2 ); } ; @@ -1026,7 +1049,8 @@ dispinterfacedef: { $$ = type_dispinterface_define_from_iface($2, $1, $4); } ; -inherit: { $$ = NULL; } +inherit + : %empty { $$ = NULL; } | ':' qualified_type { $$ = $2; } | ':' parameterized_type { $$ = $2; } ; @@ -1062,8 +1086,10 @@ required_types: | parameterized_type { $$ = append_typeref(NULL, make_typeref($1)); } | required_types ',' qualified_type { $$ = append_typeref($1, make_typeref($3)); } | required_types ',' parameterized_type { $$ = append_typeref($1, make_typeref($3)); } + ; -requires: { $$ = NULL; } +requires + : %empty { $$ = NULL; } | tREQUIRES required_types { $$ = $2; } ; @@ -1114,7 +1140,8 @@ type_qualifier: tCONST { $$ = TYPE_QUALIFIER_CONST; } ; -m_type_qual_list: { $$ = 0; } +m_type_qual_list + : %empty { $$ = 0; } | m_type_qual_list type_qualifier { $$ = $1 | $2; } ; @@ -1129,7 +1156,8 @@ unqualified_decl_spec: unqualified_type m_decl_spec_no_type { $$ = make_decl_spec($2, $1, $3, STG_NONE, 0, 0); } ; -m_decl_spec_no_type: { $$ = NULL; } +m_decl_spec_no_type + : %empty { $$ = NULL; } | decl_spec_no_type ; @@ -1169,7 +1197,8 @@ abstract_declarator_no_direct: ; /* abstract declarator or empty */ -m_abstract_declarator: { $$ = make_declarator(NULL); } +m_abstract_declarator + : %empty { $$ = make_declarator(NULL); } | abstract_declarator ; @@ -1204,7 +1233,8 @@ any_declarator_no_direct: ; /* abstract or non-abstract declarator or empty */ -m_any_declarator: { $$ = make_declarator(NULL); } +m_any_declarator + : %empty { $$ = make_declarator(NULL); } | any_declarator ; @@ -1231,7 +1261,8 @@ declarator_list: | declarator_list ',' declarator { $$ = append_declarator( $1, $3 ); } ; -m_bitfield: { $$ = NULL; } +m_bitfield + : %empty { $$ = NULL; } | ':' expr_const { $$ = $2; } ; @@ -1310,12 +1341,12 @@ version: ; acf_statements - : /* empty */ + : %empty | acf_interface acf_statements ; acf_int_statements - : /* empty */ + : %empty | acf_int_statement acf_int_statements ; @@ -1336,7 +1367,7 @@ acf_interface ; acf_attributes - : /* empty */ { $$ = NULL; }; + : %empty { $$ = NULL; }; | '[' acf_attribute_list ']' { $$ = $2; }; ;
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Alexandre Julliard