LWG4135 The helper lambda of std::erase for list should specify return type as bool

Author: burblebee

source/containers.tex

@@ -7783,7 +7783,7 @@
 \begin{itemdescr}
 \pnum
 \effects
-Equivalent to: \tcode{return erase_if(c, [\&](auto\& elem) \{ return elem == value; \});}
+Equivalent to: \tcode{return erase_if(c, [\&](const auto\& elem) -> bool \{ return elem == value; \});}
 \end{itemdescr}
 
 \indexlibrarymember{erase_if}{forward_list}%
@@ -8567,7 +8567,7 @@
 \begin{itemdescr}
 \pnum
 \effects
-Equivalent to: \tcode{return erase_if(c, [\&](auto\& elem) \{ return elem == value; \});}
+Equivalent to: \tcode{return erase_if(c, [\&](const auto\& elem) -> bool \{ return elem == value; \});}
 \end{itemdescr}
 
 \indexlibrarymember{erase_if}{list}%