Translate explicit bool cast

Author: lucic71

cpp2rust/converter/converter.cpp

@@ -1944,6 +1944,13 @@ bool Converter::VisitExplicitCastExpr(clang::ExplicitCastExpr *expr) {
       ConvertIntegerToEnumeralCast(expr, sub_expr);
       return false;
     }
+    if (type->isBooleanType() && sub_expr->getType()->isIntegerType() &&
+        !sub_expr->getType()->isBooleanType()) {
+      PushParen paren(*this);
+      Convert(sub_expr);
+      StrCat(token::kDiff, token::kZero);
+      return false;
+    }
     {
       PushParen paren(*this);
       Convert(sub_expr);

tests/unit/int_to_bool_explicit.cpp

@@ -0,0 +1,10 @@
+#include <assert.h>
+
+int main() {
+  unsigned int flag = 7;
+  bool b1 = (bool)flag;
+  bool b2 = (bool)0u;
+  assert(b1);
+  assert(!b2);
+  return 0;
+}

tests/unit/int_to_bool_explicit_c.c

@@ -0,0 +1,11 @@
+#include <assert.h>
+#include <stdbool.h>
+
+int main() {
+  unsigned int flag = 7;
+  bool b1 = (bool)flag;
+  bool b2 = (bool)0u;
+  assert(b1);
+  assert(!b2);
+  return 0;
+}

tests/unit/out/refcount/int_to_bool_explicit.rs

@@ -0,0 +1,19 @@
+extern crate libcc2rs;
+use libcc2rs::*;
+use std::cell::RefCell;
+use std::collections::BTreeMap;
+use std::io::prelude::*;
+use std::io::{Read, Seek, Write};
+use std::os::fd::AsFd;
+use std::rc::{Rc, Weak};
+pub fn main() {
+    std::process::exit(main_0());
+}
+fn main_0() -> i32 {
+    let flag: Value<u32> = Rc::new(RefCell::new(7_u32));
+    let b1: Value<bool> = Rc::new(RefCell::new(((*flag.borrow()) != 0)));
+    let b2: Value<bool> = Rc::new(RefCell::new((0_u32 != 0)));
+    assert!((*b1.borrow()));
+    assert!(!(*b2.borrow()));
+    return 0;
+}

tests/unit/out/refcount/int_to_bool_explicit_c.rs

@@ -0,0 +1,19 @@
+extern crate libcc2rs;
+use libcc2rs::*;
+use std::cell::RefCell;
+use std::collections::BTreeMap;
+use std::io::prelude::*;
+use std::io::{Read, Seek, Write};
+use std::os::fd::AsFd;
+use std::rc::{Rc, Weak};
+pub fn main() {
+    std::process::exit(main_0());
+}
+fn main_0() -> i32 {
+    let flag: Value<u32> = Rc::new(RefCell::new(7_u32));
+    let b1: Value<bool> = Rc::new(RefCell::new(((*flag.borrow()) != 0)));
+    let b2: Value<bool> = Rc::new(RefCell::new((0_u32 != 0)));
+    assert!((*b1.borrow()));
+    assert!(((!(*b2.borrow()) as i32) != 0));
+    return 0;
+}

tests/unit/out/unsafe/int_to_bool_explicit.rs

@@ -0,0 +1,21 @@
+extern crate libc;
+use libc::*;
+extern crate libcc2rs;
+use libcc2rs::*;
+use std::collections::BTreeMap;
+use std::io::{Read, Seek, Write};
+use std::os::fd::{AsFd, FromRawFd, IntoRawFd};
+use std::rc::Rc;
+pub fn main() {
+    unsafe {
+        std::process::exit(main_0() as i32);
+    }
+}
+unsafe fn main_0() -> i32 {
+    let mut flag: u32 = 7_u32;
+    let mut b1: bool = (flag != 0);
+    let mut b2: bool = (0_u32 != 0);
+    assert!(b1);
+    assert!(!b2);
+    return 0;
+}

tests/unit/out/unsafe/int_to_bool_explicit_c.rs

@@ -0,0 +1,21 @@
+extern crate libc;
+use libc::*;
+extern crate libcc2rs;
+use libcc2rs::*;
+use std::collections::BTreeMap;
+use std::io::{Read, Seek, Write};
+use std::os::fd::{AsFd, FromRawFd, IntoRawFd};
+use std::rc::Rc;
+pub fn main() {
+    unsafe {
+        std::process::exit(main_0() as i32);
+    }
+}
+unsafe fn main_0() -> i32 {
+    let mut flag: u32 = 7_u32;
+    let mut b1: bool = (flag != 0);
+    let mut b2: bool = (0_u32 != 0);
+    assert!(b1);
+    assert!(((!b2 as i32) != 0));
+    return 0;
+}