ui: Objective-C @interface support for Cocoa; minor clean-ups

compiler/fn.v

@@ -63,16 +63,6 @@ fn (p &Parser) find_var_check_new_var(name string) ?Var {
 	return none
 }
 
-fn (f &Fn) find_var2(name string) Var {
-	for i in 0 .. f.var_idx {
-		if f.local_vars[i].name == name {
-			return f.local_vars[i]
-		}
-	}
-	return Var{}
-}
-
-
 fn (p mut Parser) open_scope() {
 	p.cur_fn.defer_text << ''
 	p.cur_fn.scope_level++

compiler/gen_c.v

@@ -71,26 +71,28 @@ fn (p mut Parser) gen_fn_decl(f Fn, typ, str_args string) {
 fn types_to_c(types []Type, table &Table) string {
 	mut sb := strings.new_builder(10)
 	for t in types {
-		if t.cat != .union_ && t.cat != .struct_ {
+		if t.cat != .union_ && t.cat != .struct_ && t.cat != .objc_interface {
 			continue
 		}
-		//if is_objc {
-			//sb.writeln('@interface $name : $objc_parent { @public')
-		//}
 		//if is_atomic {
 			//sb.write('_Atomic ')
 		//}
-		kind := if t.cat == .union_ {'union'} else {'struct'}
-		sb.writeln('$kind $t.name {')
+		if t.cat ==  .objc_interface {
+			sb.writeln('@interface $t.name : $t.parent { @public')
+		}
+		else {
+			kind := if t.cat == .union_ {'union'} else {'struct'}
+			sb.writeln('$kind $t.name {')
+		}
 		for field in t.fields {
 			sb.write('\t')
 			sb.writeln(table.cgen_name_type_pair(field.name,
 				field.typ) + ';')
 		}
 		sb.writeln('};\n')
-		//if is_objc {
-			//sb.writeln('@end')
-		//}
+		if t.cat ==  .objc_interface {
+			sb.writeln('@end')
+		}
 	}
 	return sb.str()
 }

compiler/parser.v

@@ -492,14 +492,17 @@ fn key_to_type_cat(tok Token) TypeCategory {
 // also unions and interfaces
 fn (p mut Parser) struct_decl() {
 	// V can generate Objective C for integration with Cocoa
-	// `[interface:ParentInterface]`
-	//is_objc := p.attr.starts_with('interface')
-	//objc_parent := if is_objc { p.attr.right(10) } else { '' }
+	// `[objc_interface:ParentInterface]`
+	is_objc := p.attr.starts_with('objc_interface')
+	objc_parent := if is_objc { p.attr.right(15) } else { '' }
 	// interface, union, struct
 	is_interface := p.tok == .key_interface
 	is_union := p.tok == .key_union
 	is_struct := p.tok == .key_struct
 	mut cat := key_to_type_cat(p.tok)
+	if is_objc {
+		cat = .objc_interface
+	}	
 	p.fgen(p.tok.str() + ' ')
 	// Get type name
 	p.next()
@@ -530,7 +533,11 @@ fn (p mut Parser) struct_decl() {
 	if p.pass == .decl && p.table.known_type_fast(typ) {
 		p.error('`$name` redeclared')
 	}
-	if !is_c {
+	if is_objc {
+		// Forward declaration of an Objective-C interface with `@class` :)
+		p.gen_typedef('@class $name;')
+	}	
+	else if !is_c {
 		kind := if is_union {'union'} else {'struct'}
 		p.gen_typedef('typedef $kind $name $name;')
 	}
@@ -544,6 +551,7 @@ fn (p mut Parser) struct_decl() {
 		typ.is_c = is_c
 		typ.is_placeholder = false
 		typ.cat = cat
+		typ.parent = objc_parent
 		p.table.rewrite_type(typ)
 	}
 	else {
@@ -552,6 +560,7 @@ fn (p mut Parser) struct_decl() {
 			mod: p.mod
 			is_c: is_c
 			cat: cat
+			parent: objc_parent
 		}
 	}
 	// Struct `C.Foo` declaration, no body
@@ -1715,12 +1724,6 @@ fn (p mut Parser) name_expr() string {
 				p.error('undefined: `$name`')
 			}
 			else {
-				if orig_name == 'i32' {
-					println('`i32` alias was removed, use `int` instead')
-				}
-				if orig_name == 'u8' {
-					println('`u8` alias was removed, use `byte` instead')
-				}
 				p.error('undefined: `$orig_name`')
 			}
 		} else {
@@ -2852,42 +2855,11 @@ fn (p mut Parser) array_init() string {
 }
 
 fn (p mut Parser) struct_init(typ string) string {
-	//p.gen('/* struct init */')
 	p.is_struct_init = true
 	t := p.table.find_type(typ)
 	if p.gen_struct_init(typ, t) { return typ }
 	p.scanner.fmt_out.cut(typ.len)
 	ptr := typ.contains('*')
-	/*
-	if !ptr {
-		if p.is_c_struct_init {
-			// `face := C.FT_Face{}` => `FT_Face face;`
-			if p.tok == .rcbr {
-				p.is_empty_c_struct_init = true
-				p.check(.rcbr)
-				return typ
-			}
-			p.gen('(struct $typ) {')
-			p.is_c_struct_init = false
-		}
-		else {
-			p.gen('($typ /*str init */) {')
-		}
-	}
-	else {
-		// TODO tmp hack for 0 pointers init
-		// &User{!} ==> 0
-		if p.tok == .not {
-			p.next()
-			p.gen('0')
-			p.check(.rcbr)
-			return typ
-		}
-		p.is_alloc = true
-		//println('setting is_alloc=true (ret $typ)')
-		p.gen('($t.name*)memdup(&($t.name)  {')
-	}
-	*/
 	mut did_gen_something := false
 	// Loop thru all struct init keys and assign values
 	// u := User{age:20, name:'bob'}
@@ -3763,12 +3735,10 @@ fn (p mut Parser) js_decode() string {
 
 fn (p mut Parser) attribute() {
 	p.check(.lsbr)
-	if p.tok == .key_interface {
-		p.check(.key_interface)
+	p.attr = p.check_name()
+	if p.tok == .colon {
 		p.check(.colon)
-		p.attr = 'interface:' + p.check_name()
-	} else {
-		p.attr = p.check_name()
+		p.attr = p.attr + ':' + p.check_name()
 	}	
 	p.check(.rsbr)
 	if p.tok == .func || (p.tok == .key_pub && p.peek() == .func) {

compiler/table.v

@@ -54,6 +54,7 @@ enum TypeCategory {
 	union_ // 5
 	c_struct
 	c_typedef
+	objc_interface // 8 Objective C @interface
 	array
 }
 
@@ -607,6 +608,11 @@ fn (p mut Parser) _check_types(got_, expected_ string, throw bool) bool {
 	// if expected == 'T' || expected.contains('<T>') {
 	// return true
 	// }
+	// TODO fn hack
+	if got.starts_with('fn ') && (expected.ends_with('fn') ||
+	expected.ends_with('Fn')) {
+		return true
+	}	
 	// Allow pointer arithmetic
 	if expected=='void*' && got=='int' {
 		return true

examples/hot_reload/graph.v

@@ -42,7 +42,7 @@ fn (ctx &Context) draw() {
 	ctx.gg.draw_line(Size / 2, 0, Size / 2, Size) // y axis 
 	center := f64(Size / 2) 
 	for x := -10.0; x <= 10.0; x += 0.002 {
-		y := x * x + 1 
+		y := x * x - 1 
 		//y := (x + 3) * (x + 3) - 1
 		//y := math.sqrt(30.0 - x * x)
 		ctx.gg.draw_rect(center + x * Scale, center - y * Scale, 1, 1, gx.Black) 

september.plan

@@ -32,6 +32,6 @@
 + o(log n) type lookup
 - prebuilt binaries for all platforms
 - fix interfaces
-- `none` keyword for optionals
-- table: migrate all find*** functions to optionals
++ `none` keyword for optionals
++ table: migrate all find*** functions to optionals
 

vlib/darwin/darwin.v

@@ -6,7 +6,7 @@ module darwin
 struct C.NSString { }
 
 // macOS and iOS helpers
-fn nsstring(s string) *NSString {
+pub fn nsstring(s string) *NSString {
 	// #return @"" ;
 	// println('ns $s len=$s.len')
 	# return [ [ NSString alloc ] initWithBytesNoCopy:s.str  length:s.len

vlib/os/os.v

@@ -771,7 +771,8 @@ pub fn file_last_mod_unix(path string) int {
 }
 
 
-fn log(s string) {
+pub fn log(s string) {
+	println('os.log: ' + s)
 }
 
 pub fn flush_stdout() {

vlib/ui/examples/users_gui/users.v

@@ -15,6 +15,7 @@ struct User {
 }
 
 struct Context {
+	mut:
 	first_name ui.TextBox
 	last_name  ui.TextBox
 	age        ui.TextBox
@@ -23,6 +24,61 @@ struct Context {
 	txt_pos    int
 }
 
+/*
+struct Window {
+	width: 500
+	height: 300
+	title: 'Users'
+	content: Layout {
+		[
+			TextBox {
+				placeholder: 'First name'
+			},
+			TextBox {
+				placeholder: 'Last name'
+			},
+			TextBox {
+				placeholder: 'Age'
+			},
+			Button {
+				title: 'Add user'
+				onclick: btn_click
+			},
+		]
+	}	
+	
+	draw: {
+		
+	}	
+}	
+
+/*
+
+Window {
+	width: 500
+	height: 300
+	title: 'Users'
+	VLayout {
+		TextBox {
+			placeholder: 'First name'
+		}
+		TextBox {
+			placeholder: 'Last name'
+		}
+		TextBox {
+			placeholder: 'Age'
+		}
+		Button {
+			title: 'Add user'
+			onclick: btn_click
+		}
+	}	
+	
+	draw: draw_fn
+}	
+*/
+*/
+
 fn main() {
 	mut ctx := &Context {
 		txt_pos: 10
@@ -45,30 +101,30 @@ fn main() {
 }
 
 // TODO replace with `fn (ctx mut Context) btn_click() {`
-fn btn_click(_ctx *Context) {
-	mut ctx = _ctx// TODO hack
+fn btn_click(_ctx &Context) {
+	mut ctx := _ctx// TODO hack
 	ctx.users << User {
 		first_name: ctx.first_name.text()
 		last_name: ctx.last_name.text()
-		age: ctx.age.text().to_i()
+		age: ctx.age.text().int()
 	}
 	ctx.window.refresh()
 }
 
 // TODO replace with `fn (ctx mut Context) draw() {`
-fn draw(ctx *Context) {
+fn draw(ctx &Context) {
 	for i, user in ctx.users {
 		x := 10
 		y := 10 + i * CELL_HEIGHT
 		// Outer border
-		gx.draw_empty_rect(x, y, TABLE_WIDTH, CELL_HEIGHT, gx.GRAY)
+		ui.draw_empty_rect(x, y, TABLE_WIDTH, CELL_HEIGHT, gx.Gray)
 		// Vertical separators
-		gx.draw_line(x + CELL_WIDTH, y, x + CELL_WIDTH, y + CELL_HEIGHT)
-		gx.draw_line(x + CELL_WIDTH * 2, y, x + CELL_WIDTH * 2, y + CELL_HEIGHT)
+		ui.draw_line(x + CELL_WIDTH, y, x + CELL_WIDTH, y + CELL_HEIGHT, gx.Gray)
+		ui.draw_line(x + CELL_WIDTH * 2, y, x + CELL_WIDTH * 2, y + CELL_HEIGHT, gx.Gray)
 		// Text values
-		gx.draw_text_def(x + 5, y + 5, user.first_name)
-		gx.draw_text_def(x + 5 + CELL_WIDTH, y + 5, user.last_name)
-		gx.draw_text_def(x + 5 + CELL_WIDTH * 2, y + 5, user.age.str())
+		ui.draw_text_def(x + 5, y + 5, user.first_name)
+		ui.draw_text_def(x + 5 + CELL_WIDTH, y + 5, user.last_name)
+		ui.draw_text_def(x + 5 + CELL_WIDTH * 2, y + 5, user.age.str())
 	}
 }
 

vlib/ui/ui_mac.v

@@ -28,5 +28,3 @@ pub fn reg_key_vid() {
   #RegisterEventHotKey(kVK_ANSI_1, cmdKey, gMyHotKeyID,
                       #GetApplicationEventTarget(), 0, &gMyHotKeyRef);
 }
-
-