func (v *ShortError) tempVar(stem string, scope *ast.Scope) string {
for ; v.tmpvar < 10*1000; v.tmpvar++ {
name := fmt.Sprint(stem, v.tmpvar)
if scopes.Lookup(scope, name) == nil {
v.tmpvar++
return name
}
}
panic(">100,000 temporary variables used. Either the code is crazy, or I am.")
}
func (w WarnShadow) VisitStmt(scope *ast.Scope, stmt ast.Stmt) scopes.Visitor {
if stmt, ok := stmt.(*ast.DeclStmt); ok {
if decl, ok := stmt.Decl.(*ast.GenDecl); ok {
for _, spec := range decl.Specs {
if spec, ok := spec.(*ast.ValueSpec); ok {
for _, name := range spec.Names {
if scopes.Lookup(scope.Outer, name.Name) != nil {
fmt.Print(w.Position(name.Pos()).Line, ": Warning, shadowed ", name, "\n")
}
}
}
}
}
}
return w
}
func (v *Unused) VisitExpr(scope *ast.Scope, expr ast.Expr) scopes.Visitor {
switch expr := expr.(type) {
case *ast.Ident:
if v.Irrelevant[expr] {
return v
}
if def := scopes.Lookup(scope, expr.Name); def != nil {
v.Used[def] = true
} else {
v.UsedImports[expr.Name] = true
}
case *ast.SelectorExpr:
v.Irrelevant[expr.Sel] = true
case *ast.KeyValueExpr:
// if we get a := struct {Count int} {Count: 1}, disregard Count
if id, ok := expr.Key.(*ast.Ident); ok {
v.Irrelevant[id] = true
}
}
return v
}
func (v *AutoImporter) VisitExpr(scope *ast.Scope, expr ast.Expr) scopes.Visitor {
switch expr := expr.(type) {
case *ast.Ident:
if v.Irrelevant[expr] {
return v
}
if importname, ok := imports.RevStdlib[expr.Name]; ok && len(importname) == 1 &&
!v.m[expr.Name] && scopes.Lookup(scope, expr.Name) == nil {
v.m[expr.Name] = true // don't add it again
v.Patches = append(v.Patches, patch.Insert(v.pkg, "; import "+importname[0]))
}
case *ast.SelectorExpr:
v.Irrelevant[expr.Sel] = true
case *ast.KeyValueExpr:
// if we get a := struct {Count int} {Count: 1}, disregard Count
if id, ok := expr.Key.(*ast.Ident); ok {
v.Irrelevant[id] = true
}
}
return v
}
