cgen: args fixes

.github/workflows/ci.yml

@@ -136,6 +136,10 @@ jobs:
         ls
 #        ./1m
       #run: echo "TODO" #cd examples/x64 && ../../v -x64 hello_world.v && ./hello_world
+#    - name: Coveralls GitHub Action
+#      uses: coverallsapp/github-action@v1.0.1
+#      with:
+#        github-token: ${{ secrets.GITHUB_TOKEN }}
 
 
   ubuntu-prebuilt:

vlib/builtin/sorted_map.v

@@ -178,7 +178,7 @@ fn (m SortedMap) exists(key string) bool {
 	return false
 }
 
-fn (n mapnode) find_key(k string) int {
+fn (n &mapnode) find_key(k string) int {
 	mut idx := 0
 	for idx < n.size && n.keys[idx] < k {
 		idx++
@@ -353,7 +353,7 @@ pub fn (m mut SortedMap) delete(key string) {
 
 // Insert all keys of the subtree into array `keys`
 // starting at `at`. Keys are inserted in order.
-fn (n mapnode) subkeys(keys mut []string, at int) int {
+fn (n &mapnode) subkeys(keys mut []string, at int) int {
 	mut position := at
 	if !isnil(n.children) {
 		// Traverse children and insert

vlib/builtin/string.v

@@ -396,7 +396,7 @@ fn (s string) add(a string) string {
 	for j in 0..a.len {
 		res[s.len + j] = a[j]
 	}
-	res[new_len] = `\0` // V strings are not null terminated, but just in case
+	res.str[new_len] = `\0` // V strings are not null terminated, but just in case
 	return res
 }
 

vlib/v/ast/ast.v

@@ -182,6 +182,7 @@ mut:
 	expr_type     table.Type // type of `user`
 	receiver_type table.Type // User
 	return_type   table.Type
+	arg_types     []table.Type
 }
 
 pub struct Return {

vlib/v/checker/checker.v

@@ -238,10 +238,12 @@ pub fn (c mut Checker) call_expr(call_expr mut ast.CallExpr) table.Type {
 		c.expr(call_expr.args[0])
 		return f.return_type
 	}
+	mut arg_types := []table.Type
 	for i, arg_expr in call_expr.args {
 		arg := if f.is_variadic && i >= f.args.len - 1 { f.args[f.args.len - 1] } else { f.args[i] }
 		c.expected_type = arg.typ
 		typ := c.expr(arg_expr)
+		arg_types << typ
 		typ_sym := c.table.get_type_symbol(typ)
 		arg_typ_sym := c.table.get_type_symbol(arg.typ)
 		if !c.table.check(typ, arg.typ) {
@@ -258,6 +260,7 @@ pub fn (c mut Checker) call_expr(call_expr mut ast.CallExpr) table.Type {
 			c.error('!cannot use type `$typ_sym.str()` as type `$arg_typ_sym.str()` in argument ${i+1} to `$fn_name`', call_expr.pos)
 		}
 	}
+	call_expr.arg_types = arg_types
 	return f.return_type
 }
 
@@ -267,6 +270,7 @@ pub fn (c mut Checker) method_call_expr(method_call_expr mut ast.MethodCallExpr)
 	method_call_expr.expr_type = typ
 	typ_sym := c.table.get_type_symbol(typ)
 	name := method_call_expr.name
+	mut arg_types := []table.Type
 	// println('method call $name $method_call_expr.pos.line_nr')
 	if typ_sym.kind == .array && name in ['filter', 'clone', 'repeat'] {
 		if name == 'filter' {
@@ -301,6 +305,7 @@ pub fn (c mut Checker) method_call_expr(method_call_expr mut ast.MethodCallExpr)
 		// }
 		for i, arg_expr in method_call_expr.args {
 			c.expected_type = method.args[i + 1].typ
+			arg_types << c.expected_type
 			c.expr(arg_expr)
 		}
 		method_call_expr.receiver_type = method.args[0].typ

vlib/v/gen/cgen.v

@@ -410,8 +410,12 @@ fn (g mut Gen) gen_fn_decl(it ast.FnDecl) {
 			g.definitions.write(arg_type_name)
 		}
 		else {
-			nr_muls := table.type_nr_muls(arg.typ)
+			mut nr_muls := table.type_nr_muls(arg.typ)
 			mut s := arg_type_name + ' ' + arg.name
+			if arg.is_mut {
+				// mut arg needs one *
+				nr_muls = 1
+			}
 			if nr_muls > 0 {
 				s = arg_type_name + strings.repeat(`*`, nr_muls) + ' ' + arg.name
 			}
@@ -464,7 +468,7 @@ fn (g mut Gen) expr(node ast.Expr) {
 			}
 			g.expr(it.val)
 			if g.is_array_set {
-				g.write(')')
+				g.write(' })')
 				g.is_array_set = false
 			}
 			g.is_assign_expr = false
@@ -483,7 +487,7 @@ fn (g mut Gen) expr(node ast.Expr) {
 				name = name[3..]
 			}
 			g.write('${name}(')
-			g.call_args(it.args, it.muts)
+			g.call_args(it.args, it.muts, it.arg_types)
 			g.write(')')
 			g.is_c_call = false
 		}
@@ -689,7 +693,7 @@ fn (g mut Gen) expr(node ast.Expr) {
 			if it.args.len > 0 {
 				g.write(', ')
 			}
-			g.call_args(it.args, it.muts)
+			g.call_args(it.args, it.muts, it.arg_types)
 			g.write(')')
 		}
 		ast.None {
@@ -895,18 +899,18 @@ fn (g mut Gen) index_expr(node ast.IndexExpr) {
 	if !is_range && node.container_type != 0 {
 		sym := g.table.get_type_symbol(node.container_type)
 		if sym.kind == .array {
+			info := sym.info as table.Array
+			elem_type_str := g.typ(info.elem_type)
 			if g.is_assign_expr {
 				g.is_array_set = true
 				g.write('array_set(&')
 				g.expr(node.left)
 				g.write(', ')
 				g.expr(node.index)
-				g.write(', ')
+				g.write(', &($elem_type_str[]) { ')
 			}
 			else {
-				info := sym.info as table.Array
+				g.write('(*($elem_type_str*)array_get(')
-				styp := g.typ(info.elem_type)
-				g.write('(*($styp*)array_get(')
 				g.expr(node.left)
 				g.write(', ')
 				g.expr(node.index)
@@ -959,10 +963,17 @@ fn (g mut Gen) const_decl(node ast.ConstDecl) {
 	}
 }
 
-fn (g mut Gen) call_args(args []ast.Expr, muts []bool) {
+fn (g mut Gen) call_args(args []ast.Expr, muts []bool, arg_types []table.Type) {
 	for i, expr in args {
-		if muts[i] {
+		if arg_types.len > 0 {
-			g.write('&/*mut*/')
+			// typ := arg_types[i]
+			arg_is_ptr := table.type_is_ptr(arg_types[i])
+			if muts[i] && !arg_is_ptr {
+				g.write('&/*mut*/')
+			}
+			else if arg_is_ptr {
+				g.write('&/*q*/')
+			}
 		}
 		g.expr(expr)
 		if i != args.len - 1 {
@@ -977,6 +988,7 @@ fn verror(s string) {
 }
 
 const (
+// TODO all builtin types must be lowercase
 	builtins = ['string', 'array', 'KeyValue', 'map', 'Option']
 )
 

vlib/v/gen/tests/1.c

@@ -76,7 +76,7 @@ i < 10; i++) {
 	array_int nums3 = array_slice(nums, 1, 2);
 	array_int nums4 = array_slice(nums, 1, nums.len);
 	int number = (*(int*)array_get(nums, 0));
-	array_set(&nums, 1, 10);
+	array_set(&nums, 1, &(int[]) { 10 });
 	array_bool bools = new_array_from_c_array(2, 2, sizeof(array_bool), (bool[]){
 		true, false,
 	});

vlib/v/parser/fn.v

@@ -83,7 +83,7 @@ fn (p mut Parser) fn_decl() ast.FnDecl {
 		rec_name = p.check_name()
 		rec_mut = p.tok.kind == .key_mut
 		// if rec_mut {
-		// 	p.check(.key_mut)
+		// p.check(.key_mut)
 		// }
 		// TODO: talk to alex, should mut be parsed with the type like this?
 		// or should it be a property of the arg, like this ptr/mut becomes indistinguishable
@@ -97,7 +97,7 @@ fn (p mut Parser) fn_decl() ast.FnDecl {
 	}
 	mut name := ''
 	if p.tok.kind == .name {
-		// TODO high
+		// TODO high order fn
 		name = p.check_name()
 	}
 	if p.tok.kind in [.plus, .minus, .mul, .div, .mod] {
@@ -229,9 +229,9 @@ fn (p mut Parser) fn_args() ([]ast.Arg,bool) {
 				arg_names << p.check_name()
 			}
 			is_mut := p.tok.kind == .key_mut
-			if is_mut {
+			// if is_mut {
-				p.check(.key_mut)
+			// p.check(.key_mut)
-			}
+			// }
 			if p.tok.kind == .ellipsis {
 				p.check(.ellipsis)
 				is_variadic = true

vlib/v/parser/parser.v

@@ -16,14 +16,6 @@ import (
 const (
 	colored_output = term.can_show_color_on_stderr()
 )
-/*
-type PrefixParseFn fn()ast.Expr
-
-type InfixParseFn fn(e ast.Expr)ast.Expr
-
-type PostfixParseFn fn()ast.Expr
-*/
-
 
 struct Parser {
 	scanner     &scanner.Scanner