vfmt: prepare for using .source_name in type_to_str

vlib/v/parser/parse_type.v

@@ -334,6 +334,7 @@ pub fn (mut p Parser) parse_generic_template_type(name string) table.Type {
 	idx = p.table.register_type_symbol(table.TypeSymbol{
 		name: name
 		source_name: name
+		mod: p.mod
 		kind: .any
 		is_public: true
 	})
@@ -372,6 +373,7 @@ pub fn (mut p Parser) parse_generic_struct_inst_type(name string) table.Type {
 			kind: .generic_struct_inst
 			name: bs_name
 			source_name: bs_name
+			mod: p.mod
 			info: table.GenericStructInst{
 				parent_idx: p.table.type_idxs[name]
 				generic_types: generic_types

vlib/v/parser/parser.v

@@ -1544,12 +1544,12 @@ fn (mut p Parser) import_syms(mut parent ast.Import) {
 			idx := p.table.add_placeholder_type(name)
 			typ := table.new_type(idx)
 			prepend_mod_name := p.prepend_mod(alias)
-			p.table.register_type_symbol({
+			p.table.register_type_symbol(table.TypeSymbol{
 				kind: .alias
 				name: prepend_mod_name
 				source_name: prepend_mod_name
-				parent_idx: idx
 				mod: p.mod
+				parent_idx: idx
 				info: table.Alias{
 					parent_type: typ
 					language: table.Language.v
@@ -1878,12 +1878,12 @@ fn (mut p Parser) type_decl() ast.TypeDecl {
 		table.Language.v
 	}
 	prepend_mod_name := p.prepend_mod(name)
-	p.table.register_type_symbol({
+	p.table.register_type_symbol(table.TypeSymbol{
 		kind: .alias
 		name: prepend_mod_name
 		source_name: prepend_mod_name
-		parent_idx: pid
 		mod: p.mod
+		parent_idx: pid
 		info: table.Alias{
 			parent_type: parent_type
 			language: language

vlib/v/parser/struct.v

@@ -228,6 +228,7 @@ fn (mut p Parser) struct_decl() ast.StructDecl {
 		kind: .struct_
 		name: name
 		source_name: name
+		mod: p.mod
 		info: table.Struct{
 			fields: fields
 			is_typedef: attrs.contains('typedef')
@@ -235,7 +236,6 @@ fn (mut p Parser) struct_decl() ast.StructDecl {
 			is_ref_only: attrs.contains('ref_only')
 			generic_types: generic_types
 		}
-		mod: p.mod
 		is_public: is_pub
 	}
 	mut ret := 0

vlib/v/table/table.v

@@ -618,10 +618,15 @@ pub fn (mut t Table) find_or_register_fn_type(mod string, f Fn, is_anon, has_dec
 }
 
 pub fn (mut t Table) add_placeholder_type(name string) int {
+	mut modname := ''
+	if name.contains('.') {
+		modname = name.all_before_last('.')
+	}
 	ph_type := TypeSymbol{
 		kind: .placeholder
 		name: name
 		source_name: name
+		mod: modname
 	}
 	// println('added placeholder: $name - $ph_type.idx')
 	return t.register_type_symbol(ph_type)