问题调用std :: max [英] Problem calling std::max
问题描述
我在Visual Studio中编译了我的bison生成的文件,并得到了这些错误:
I compiled my bison-generated files in Visual Studio and got these errors:
... \position.hh ):错误C2589:'(':'::'右侧的非法令牌
... \position.hh(83):错误C2059:语法错误:'::'
... \position.hh(83):错误C2589:'(':'::'右侧的非法令牌
... \position.hh 83):error C2059:syntax error:'::'
...\position.hh(83): error C2589: '(' : illegal token on right side of '::'
...\position.hh(83): error C2059: syntax error : '::'
...\position.hh(83): error C2589: '(' : illegal token on right side of '::'
...\position.hh(83): error C2059: syntax error : '::'
相应的代码是:
inline void columns (int count = 1)
{
column = std::max (1u, column + count);
}
我认为问题是std :: max;如果我改变std :: max
I think the problem is with std::max; if I change std::max to equivalent code then there is no problem anymore, but is there a better solution instead of changing the generated code?
这是我写的bison文件:
Here is the bison file I wrote:
//
// bison.yy
//
%skeleton "lalr1.cc"
%require "2.4.2"
%defines
%define parser_class_name "cmd_parser"
%locations
%debug
%error-verbose
%code requires {
class ParserDriver;
}
%parse-param { ParserDriver& driver }
%lex-param { ParserDriver& driver }
%union {
struct ast *a;
double d;
struct symbol *s;
struct symlist *sl;
int fn;
}
%code {
#include "helper_func.h"
#include "ParserDriver.h"
std::string error_msg = "";
}
%token <d> NUMBER
%token <s> NAME
%token <fn> FUNC
%token EOL
%token IF THEN ELSE WHILE DO LET
%token SYM_TABLE_OVERFLOW
%token UNKNOWN_CHARACTER
%nonassoc <fn> CMP
%right '='
%left '+' '-'
%left '*' '/'
%nonassoc '|' UMINUS
%type <a> exp stmt list explist
%type <sl> symlist
%{
extern int yylex(yy::cmd_parser::semantic_type *yylval,
yy::cmd_parser::location_type* yylloc);
%}
%start calclist
%%
... grammar rules ...
推荐答案
你可能包括 windows.h
它定义了名为 max
和 min
的宏。
You are probably including windows.h
somewhere, which defines macros named max
and min
.
在包含 windows.h
之前可以 #define NOMINMAX
,以防止它定义这些宏,或者您可以防止宏调用使用额外的一组括号:
You can #define NOMINMAX
before including windows.h
to prevent it from defining those macros, or you can prevent macro invocation by using an extra set of parentheses:
column = (std::max)(1u, column + count);
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