fmt: fix removal of selective imported generic type (#11395)

vlib/v/fmt/fmt.v

@@ -235,7 +235,8 @@ pub fn (mut f Fmt) short_module(name string) string {
 
 pub fn (mut f Fmt) mark_types_import_as_used(typ ast.Type) {
 	sym := f.table.get_type_symbol(typ)
-	f.mark_import_as_used(sym.name)
+	name := sym.name.split('<')[0] // take `Type` from `Type<T>`
+	f.mark_import_as_used(name)
 }
 
 // `name` is a function (`foo.bar()`) or type (`foo.Bar{}`)

vlib/v/fmt/tests/import_selective_expected.vv

@@ -8,7 +8,9 @@ import os {
 import mod {
 	Enum,
 	FnArg,
+	FnArgGeneric,
 	FnRet,
+	FnRetGeneric,
 	InterfaceField,
 	InterfaceMethodArg,
 	InterfaceMethodRet,
@@ -17,7 +19,9 @@ import mod {
 	StructEmbed,
 	StructField,
 	StructMethodArg,
+	StructMethodArgGeneric,
 	StructMethodRet,
+	StructMethodRetGeneric,
 	StructRefField,
 }
 
@@ -31,6 +35,10 @@ fn (s Struct) method(v StructMethodArg) StructMethodRet {
 	return StructMethodRet{}
 }
 
+fn (s Struct) method_generic<T>(v StructMethodArgGeneric<T>) StructMethodRetGeneric<T> {
+	return StructMethodRet<T>{}
+}
+
 interface Interface {
 	v InterfaceField
 	f(InterfaceMethodArg) InterfaceMethodRet
@@ -46,6 +54,10 @@ fn f(v FnArg) FnRet {
 	return FnRet{}
 }
 
+fn f_generic<T>(v FnArgGeneric<T>) FnRetGeneric<T> {
+	return FnRetGeneric<T>{}
+}
+
 struct App {
 	command &Command
 }

vlib/v/fmt/tests/import_selective_input.vv

@@ -11,14 +11,18 @@ import mod {
 	Unused,
 	StructEmbed, StructField, StructRefField
 	StructMethodArg,
-	StructMethodRet
+	StructMethodArgGeneric,
+	StructMethodRet,
+	StructMethodRetGeneric,
 
 	InterfaceField,
 	InterfaceMethodArg,
 	InterfaceMethodRet,
 
 	FnArg,
+	FnArgGeneric
 	FnRet,
+	FnRetGeneric
 
 	RightOfIs,
 	RightOfAs,
@@ -36,6 +40,10 @@ fn (s Struct) method(v StructMethodArg) StructMethodRet {
 	return StructMethodRet{}
 }
 
+fn (s Struct) method_generic<T>(v StructMethodArgGeneric<T>) StructMethodRetGeneric<T> {
+	return StructMethodRet<T>{}
+}
+
 interface Interface {
 	v InterfaceField
 	f(InterfaceMethodArg) InterfaceMethodRet
@@ -50,6 +58,10 @@ fn f(v FnArg) FnRet {
 	return FnRet{}
 }
 
+fn f_generic<T>(v FnArgGeneric<T>) FnRetGeneric<T> {
+	return FnRetGeneric<T>{}
+}
+
 struct App {
 	command &Command
 }