cgen: match: do not use a temp var; minor fixes

cmd/tools/vpm.v

@@ -9,7 +9,7 @@ import (
 )
 
 const (
-	default_vpm_server_urls = ['https://vpm.best', 'https://vpm.vlang.io']
+	default_vpm_server_urls = ['https://vpm.vlang.io']
 	valid_vpm_commands = ['help', 'search', 'install', 'update', 'remove']
 	excluded_dirs = ['cache', 'vlib']
 	supported_vcs_systems = ['git', 'hg']
@@ -344,7 +344,7 @@ fn get_all_modules() []string {
 		panic(err)
 	}
 	if r.status_code != 200 {
-		println('Failed to search vpm.best. Status code: $r.status_code')
+		println('Failed to search vpm.vlang.io. Status code: $r.status_code')
 		exit(1)
 	}
 	s := r.text

cmd/v/internal/help/default.txt

@@ -11,7 +11,7 @@ Examples:
 The commands are:
    build             Build V code in the provided path (default).
    create            Setup the file structure for a V project.
-   doc               Generates the documentation for a V module (coming soon in 0.3).
+   doc               Generate the documentation for a V module.
    fmt               Format the V code provided.
    repl              Run the REPL.
    run               Compile and run a V program.

cmd/v/symlink.v

@@ -1,33 +0,0 @@
-// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
-// Use of this source code is governed by an MIT license
-// that can be found in the LICENSE file.
-module main
-
-import (
-	os
-	v.pref
-)
-
-fn create_symlink() {
-	$if windows {
-		return
-	}
-	vexe := pref.vexe_path()
-	mut link_path := '/usr/local/bin/v'
-	mut ret := os.exec('ln -sf $vexe $link_path') or { panic(err) }
-	if ret.exit_code == 0 {
-		println('Symlink "$link_path" has been created')
-	}
-	else if os.system('uname -o | grep -q \'[A/a]ndroid\'') == 0 {
-		println('Failed to create symlink "$link_path". Trying again with Termux path for Android.')
-		link_path = '/data/data/com.termux/files/usr/bin/v'
-		ret = os.exec('ln -sf $vexe $link_path') or { panic(err) }
-		if ret.exit_code == 0 {
-			println('Symlink "$link_path" has been created')
-		} else {
-			println('Failed to create symlink "$link_path". Try again with sudo.')
-		}
-	} else {
-			println('Failed to create symlink "$link_path". Try again with sudo.')
-	}
-}

cmd/v/v.v

@@ -11,6 +11,7 @@ import (
 	os
 	v.table
 	v.doc
+	v.pref
 )
 
 const (
@@ -149,3 +150,27 @@ fn disallow_unknown_flags(prefs flag.MainCmdPreferences) {
 	println('V Error: Unexpected flag found: $prefs.unknown_flag')
 	exit(1)
 }
+
+fn create_symlink() {
+	$if windows {
+		return
+	}
+	vexe := pref.vexe_path()
+	mut link_path := '/usr/local/bin/v'
+	mut ret := os.exec('ln -sf $vexe $link_path') or { panic(err) }
+	if ret.exit_code == 0 {
+		println('Symlink "$link_path" has been created')
+	}
+	else if os.system('uname -o | grep -q \'[A/a]ndroid\'') == 0 {
+		println('Failed to create symlink "$link_path". Trying again with Termux path for Android.')
+		link_path = '/data/data/com.termux/files/usr/bin/v'
+		ret = os.exec('ln -sf $vexe $link_path') or { panic(err) }
+		if ret.exit_code == 0 {
+			println('Symlink "$link_path" has been created')
+		} else {
+			println('Failed to create symlink "$link_path". Try again with sudo.')
+		}
+	} else {
+			println('Failed to create symlink "$link_path". Try again with sudo.')
+	}
+}

vlib/v/ast/ast.v

@@ -351,6 +351,7 @@ pub:
 	branches    []MatchBranch
 	pos         token.Position
 mut:
+is_expr bool // returns a value
 	expr_type   table.Type // type of `x` in `match x {`
 	is_sum_type bool
 }

vlib/v/gen/cgen.v

@@ -84,7 +84,7 @@ pub fn (g &Gen) styp(t string) string {
 }
 */
 
-
+//
 pub fn (g mut Gen) write_typedef_types() {
 	for typ in g.table.types {
 		match typ.kind {
@@ -1019,10 +1019,10 @@ fn (g mut Gen) match_expr(node ast.MatchExpr) {
 	if type_sym.kind != .void {
 		tmp = g.new_tmp_var()
 	}
-	styp := g.typ(node.expr_type)
+	//styp := g.typ(node.expr_type)
-	g.write('$styp $tmp = ')
+	//g.write('$styp $tmp = ')
-	g.expr(node.cond)
+	//g.expr(node.cond)
-	g.writeln(';') // $it.blocks.len')
+	//g.writeln(';') // $it.blocks.len')
 	// mut sum_type_str = ''
 	for j, branch in node.branches {
 		if j == node.branches.len - 1 {
@@ -1036,14 +1036,22 @@ fn (g mut Gen) match_expr(node ast.MatchExpr) {
 			g.write('if (')
 			for i, expr in branch.exprs {
 				if node.is_sum_type {
-					g.write('${tmp}.typ == ')
+					g.expr(node.cond )
+					g.write('.typ == ')
+					//g.write('${tmp}.typ == ')
 					// sum_type_str
 				}
 				else if type_sym.kind == .string {
-					g.write('string_eq($tmp, ')
+					g.write('string_eq(')
+					//
+g.expr(node.cond)
+g.write(', ')
+					//g.write('string_eq($tmp, ')
 				}
 				else {
-					g.write('$tmp == ')
+					g.expr(node.cond)
+					g.write(' == ')
+					//g.write('$tmp == ')
 				}
 				g.expr(expr)
 				if type_sym.kind == .string {

vlib/v/gen/tests/1.c

@@ -163,14 +163,11 @@ void println(string s) {
 
 void matches() {
 	int a = 100;
-	int tmp1 = a;
+	if (a == 10) {
-	if (tmp1 == 10) {
 		println(tos3("10"));
-
 	}
-	else if (tmp1 == 20) {
+	else if (a == 20) {
 		int k = a + 1;
-
 	}
 	else {
 	}

vlib/v/gen/tests/3.c

@@ -39,12 +39,11 @@ void println(string s) {
 }
 
 void handle_expr(Expr e) {
-	Expr tmp1 = e;
+	if (e.typ == _type_idx_IfExpr) {
-	if (tmp1.typ == _type_idx_IfExpr) {
 		IfExpr* it = (IfExpr*)tmp1.obj; // ST it
 		println(tos3("if"));
 	}
-	else if (tmp1.typ == _type_idx_IntegerLiteral) {
+	else if (e.typ == _type_idx_IntegerLiteral) {
 		IntegerLiteral* it = (IntegerLiteral*)tmp1.obj; // ST it
 		println(tos3("integer"));
 	}

vlib/v/parser/parser.v

@@ -12,7 +12,7 @@ import (
 	term
 	os
 	// runtime
-	sync
+	// sync
 	// time
 )
 
@@ -113,6 +113,7 @@ pub fn parse_file(path string, table &table.Table, comments_mode scanner.Comment
 	}
 }
 
+/*
 struct Queue {
 mut:
 	idx              int
@@ -137,6 +138,8 @@ fn (q mut Queue) run() {
 	q.parsed_ast_files << file
 	q.mu.unlock()
 }
+*/
+
 
 pub fn parse_files(paths []string, table &table.Table) []ast.File {
 	/*