jsgen: class -> factory

vlib/builtin/js/builtin.v

@@ -7,10 +7,10 @@ module builtin
 fn JS.console.log(arg ...string)
 fn JS.process.stdout.write(arg string)
 
-pub fn println(s string) {
+pub fn println(s any) {
 	JS.console.log(s)
 }
 
-pub fn print(s string) {
+pub fn print(s any) {
 	JS.process.stdout.write(s)
 }

vlib/v/gen/js/js.v

@@ -17,6 +17,9 @@ const (
 		'var', 'void', 'while', 'with', 'yield']
 	tabs = ['', '\t', '\t\t', '\t\t\t', '\t\t\t\t', '\t\t\t\t\t', '\t\t\t\t\t\t', '\t\t\t\t\t\t\t', '\t\t\t\t\t\t\t\t']
 	builtin_globals = ['println', 'print']
+	type_values = {
+
+	}
 )
 
 struct JsGen {
@@ -115,7 +118,8 @@ pub fn gen(files []ast.File, table &table.Table, pref &pref.Preferences) string
 		for pub_var in g.namespaces_pub[node.name] {
 			out += '\n\t\t$pub_var,'
 		}
-		out += '\n\t};'
+		if g.namespaces_pub[node.name].len > 0 { out += '\n\t' }
+		out += '};'
 		out += '\n})('
 		for i, key in imports.keys() {
 			if i > 0 { out += ', ' }
@@ -242,7 +246,7 @@ fn (mut g JsGen) to_js_typ(typ string) string {
 				styp = g.to_js_typ(typ.replace('array_', '')) + '[]'
 			} else if typ.starts_with('map_') {
 				tokens := typ.split('_')
-				styp = 'Map<${tokens[1]}, ${tokens[2]}>'
+				styp = 'Map<${g.to_js_typ(tokens[1])}, ${g.to_js_typ(tokens[2])}>'
 			} else {
 				styp = typ
 			}
@@ -259,6 +263,42 @@ fn (mut g JsGen) to_js_typ(typ string) string {
 	return styp
 }
 
+fn (mut g JsGen) to_js_typ_val(typ string) string {
+	mut styp := ''
+	match typ {
+		'number' {
+			styp = '0'
+		}
+		'boolean' {
+			styp = 'false'
+		}
+		'Object' {
+			styp = '{}'
+		}
+		'string' {
+			styp = '""'
+		}
+		else {
+			if typ.starts_with('Map') {
+				styp = 'new Map()'
+			} else if typ.ends_with('[]') {
+				styp = '[]'
+			} else {
+				styp = '{}'
+			}
+		}
+	}
+	// ns.export => ns["export"]
+	for i, v in styp.split('.') {
+		if i == 0 {
+			styp = v
+			continue
+		}
+		styp += '["$v"]'
+	}
+	return styp
+}
+
 pub fn (g &JsGen) save() {}
 
 pub fn (mut g JsGen) gen_indent() {
@@ -828,7 +868,7 @@ fn (mut g JsGen) gen_method_decl(it ast.FnDecl) {
 	if is_main {
 		g.write(')();')
 	}
-	if !it.is_anon {
+	if !it.is_anon && !it.is_method {
 		g.writeln('')
 	}
 
@@ -1021,27 +1061,44 @@ fn (mut g JsGen) enum_expr(node ast.Expr) {
 }
 
 fn (mut g JsGen) gen_struct_decl(node ast.StructDecl) {
-	g.writeln('class ${g.js_name(node.name)} {')
-	g.inc_indent()
-	g.writeln(g.doc.gen_ctor(node.fields))
-	g.writeln('constructor(values) {')
+	g.writeln(g.doc.gen_fac_fn(node.fields))
+	g.write('function ${g.js_name(node.name)}({ ')
+	for i, field in node.fields {
+		g.write('$field.name = ')
+		if field.has_default_expr {
+			g.expr(field.default_expr)
+		} else {
+			g.write('${g.to_js_typ_val(g.typ(field.typ))}')
+		}
+		if i < node.fields.len - 1 { g.write(', ') }
+	}
+	g.writeln(' }) {')
 	g.inc_indent()
 	for field in node.fields {
-		// TODO: Generate default struct init values
-		g.writeln('this.$field.name = values.$field.name')
+		g.writeln('this.$field.name = $field.name')
 	}
 	g.dec_indent()
-	g.writeln('}')
+	g.writeln('};')
+
+	g.writeln('${g.js_name(node.name)}.prototype = {')
+	g.inc_indent()
 
 	fns := g.method_fn_decls[node.name]
-	for cfn in fns {
+
+	for i, field in node.fields {
+		g.writeln(g.doc.gen_typ(g.typ(field.typ), field.name))
+		g.write('$field.name: ${g.to_js_typ_val(g.typ(field.typ))}')
+		if i < node.fields.len - 1 || fns.len > 0 { g.writeln(',') } else { g.writeln('') }
+	}
+
+	for i, cfn in fns {
 		// TODO: Move cast to the entire array whenever it's possible
 		it := cfn as ast.FnDecl
-		g.writeln('')
 		g.gen_method_decl(it)
+		if i < fns.len - 1 { g.writeln(',') } else { g.writeln('') }
 	}
 	g.dec_indent()
-	g.writeln('}\n')
+	g.writeln('};\n')
 	if node.is_pub {
 		g.push_pub_var(node.name)
 	}
@@ -1050,6 +1107,9 @@ fn (mut g JsGen) gen_struct_decl(node ast.StructDecl) {
 fn (mut g JsGen) gen_struct_init(it ast.StructInit) {
 	type_sym := g.table.get_type_symbol(it.typ)
 	name := type_sym.name
+	if it.fields.len == 0 {
+		g.write('new ${g.js_name(name)}({})')
+	} else {
 		g.writeln('new ${g.js_name(name)}({')
 		g.inc_indent()
 		for i, field in it.fields {
@@ -1063,6 +1123,7 @@ fn (mut g JsGen) gen_struct_init(it ast.StructInit) {
 		g.dec_indent()
 		g.write('})')
 	}
+}
 
 fn (mut g JsGen) gen_ident(node ast.Ident) {
 	if node.kind == .constant {

vlib/v/gen/js/jsdoc.v

@@ -53,7 +53,7 @@ fn (mut d JsDoc) gen_typ(typ, name string) string {
 	return d.out.str()
 }
 
-fn (mut d JsDoc) gen_ctor(fields []ast.StructField) string {
+fn (mut d JsDoc) gen_fac_fn(fields []ast.StructField) string {
 	d.reset()
 	d.writeln('/**')
 	d.write(' * @param {{')
@@ -62,9 +62,7 @@ fn (mut d JsDoc) gen_ctor(fields []ast.StructField) string {
 		// so all struct members don't have to be initialized.
 		// TODO: Actually generate default struct init values :P
 		d.write('$field.name?: ${d.gen.typ(field.typ)}')
-		if i < fields.len - 1 {
-			d.write(', ')
-		}
+		if i < fields.len - 1 { d.write(', ') }
 	}
 	d.writeln('}} values - values for this class fields')
 	d.writeln(' * @constructor')
@@ -93,6 +91,7 @@ fn (mut d JsDoc) gen_fn(it ast.FnDecl) string {
 		}
 	}
 	d.writeln(' * @returns {$type_name}')
+	d.writeln(' * @function')
 	d.write('*/')
 	return d.out.str()
 }

vlib/v/gen/js/tests/struct.js

@@ -0,0 +1,89 @@
+// V_COMMIT_HASH 7e55261
+// V_CURRENT_COMMIT_HASH 79b1f27
+// Generated by the V compiler
+
+"use strict";
+
+/** @namespace builtin */
+const builtin = (function () {
+	/**
+	 * @param {any} s
+	 * @returns {void}
+	 * @function
+	*/
+	function println(s) {
+		console.log(s);
+	}
+	
+	/**
+	 * @param {any} s
+	 * @returns {void}
+	 * @function
+	*/
+	function print(s) {
+		process.stdout.write(s);
+	}
+
+	/* module exports */
+	return {
+		println,
+		print,
+	};
+})();
+
+/** @namespace main */
+const main = (function () {
+	/**
+	 * @param {{value?: number, test?: Map<string, number>, hello?: number[]}} values - values for this class fields
+	 * @constructor
+	*/
+	function Int({ value = 0, test = new Map(), hello = [] }) {
+		this.value = value
+		this.test = test
+		this.hello = hello
+	};
+	Int.prototype = {
+		/** @type {number} - value */
+		value: 0,
+		/** @type {Map<string, number>} - test */
+		test: new Map(),
+		/** @type {number[]} - hello */
+		hello: [],
+		/**
+		 * @param {number} value
+		 * @returns {void}
+		 * @function
+		*/
+		add(value) {
+			const i = this;
+			i.value += value;
+		},
+		/**
+		 * @returns {number}
+		 * @function
+		*/
+		get() {
+			const i = this;
+			return i.value;
+		}
+	};
+
+	
+	
+	/* program entry point */
+	(function() {
+		const a = new Int({
+			value: 10
+		});
+		a.add(5);
+		builtin.println(a);
+		const b = new Int({});
+		b.add(10);
+		builtin.println(b.get());
+	})();
+
+	/* module exports */
+	return {};
+})();
+
+

vlib/v/gen/js/tests/struct.v

@@ -0,0 +1,26 @@
+module main
+
+struct Int {
+mut:
+  value int
+  test map[string]int
+  hello []int
+}
+
+fn (mut i Int) add(value int) {
+  i.value += value
+}
+
+fn (i Int) get() int {
+  return i.value
+}
+
+fn main() {
+  a := Int { value: 10 }
+  a.add(5)
+  println(a) // 15
+
+  b := Int{}
+  b.add(10)
+  println(b.get()) // 10
+}