Changeset 1b6477e in mainline

Timestamp:

2018-07-05T21:41:17Z (6 years ago)

Author:

Dzejrou <dzejrou@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

ef9d0988

Parents:

c2c1966

git-author:

Jaroslav Jindrak <dzejrou@…> (2017-10-11 16:29:33)

git-committer:

Dzejrou <dzejrou@…> (2018-07-05 21:41:17)

Message:

cpp: finished typeinfo and typeid support

Location:

uspace/lib/cpp

Files:

• Makefile (modified) (1 diff)
• include/internal/abi.hpp (added)
• include/typeinfo (modified) (1 diff)
• src/internal/runtime.cpp (added)
• src/typeinfo.cpp (modified) (2 diffs)

uspace/lib/cpp/Makefile

@@ -41 +41 @@
         src/exception.cpp \
         src/new.cpp \
-        src/typeinfo.cpp
+        src/typeinfo.cpp \
+        src/internal/runtime.cpp
 
 include $(USPACE_PREFIX)/Makefile.common

uspace/lib/cpp/include/typeinfo

@@ -27 +27 @@
  */
 
+#include <cstdlib>
+
 namespace std
 {

uspace/lib/cpp/src/typeinfo.cpp

@@ -28 +28 @@
 
 #include <cstring>
-
 #include <typeinfo>
 
@@ -50 +49 @@
     bool type_info::before(const type_info& other) const noexcept
     {
-        // TODO: implement (need type_index)
-        return false;
+        /**
+         * cppreference.com:
+         *  Returns true if the type of this type_info precedes the type
+         *  of rhs in the implementation's collation order. No guarantees
+         *  are given; in particular, the collation order can change
+         *  between the invocations of the same program.
+         *
+         * Seems completely arbitrary and the only guarantee
+         * we have to provide that two comparisons of two same
+         * type_info instances return the same result.
+         */
+        return name() < other.name();
     }
 
     size_t type_info::hash_code() const noexcept
     {
-        // TODO: implement
-        return size_t{};
+        /**
+         * We only need for the hash codes of two type_info
+         * instances describing the same type to match, nothing
+         * else.
+         */
+        size_t res{};
+        const char* str = name();
+        while(*str)
+            res += static_cast<size_t>(*str++);
+
+        return res;
     }