觉得golang的 variable declared but not used 和 package imported but not used 在调试代码的时候很不方便!!!!!! 这么多语言中只有golang会有变量不使用, 包引用不用报错的!
有没有方法去掉这两个验证? 再上生产的时候开启验证再改代码?
方法: 修改golang源码, 将error错误改成warn错误(在eclipse上都会显示红色错误, 但warn不影响编译), 重新编译源码.
1 解决:declared but not used
修改go/src/cmd/gc/walk.c
for(l=fn->dcl; l; l=l->next) {
if(l->n->op != ONAME || (l->n->class&~PHEAP) != PAUTO || l->n->sym->name[0] == '&' || l->n->used)
continue;
if(l->n->defn && l->n->defn->op == OTYPESW) {
if(l->n->defn->left->used)
continue;
lineno = l->n->defn->left->lineno;
warn("%S declared and not used", l->n->sym);
l->n->defn->left->used = 1; // suppress repeats
} else {
lineno = l->n->lineno;
// 此处修改
// yyerror("%S declared and not used, l->n->sym); // life
}
}
2 解决imported but not used:
修改:go/src/cmd/gc/lex.c
if
(
s
->
def
->
op
==
OPACK
)
{
// throw away top-level package name leftover
// from previous file.
// leave s->block set to cause redeclaration
// errors if a conflicting top-level name is
// introduced by a different file.
if(!s->def->used && !nsyntaxerrors) {
lineno = s->def->lineno;
warn("imported and not used: \"%Z\"" , s->def->pkg->path);
}
s->def = N;
continue;
}
本文之前发布在google group golang-china上: https://groups.google.com/forum/?fromgroups#!topic/golang-china/W0WMC__2NO8
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