msdn 英文之try, catch, and throw Statements

y-block :
try compound-statement handler-list

handler-list :
handler handler-list_opt

handler :
catch ( exception-declaration ) compound-statement

exception-declaration :
type-specifier-list declarator
type-specifier-list abstract-declarator
type-specifier-list
...

throw-expression :
throw assignment-expression_opt

·           The compound-statement after the try clause is the guarded section of code. The throw-expression “throws” (raises) an exception. The compound-statement after the catch clause（n. 条款；子句） is the exception handler, and “catches” (handles) the exception thrown by the throw-expression. The exception-declaration statement indicates the type of exception the clause handles. The type can be any valid data type, including a C++ class. If the exception-declaration statement is an ellipsis (省略...), the catch clause handles any type of exception, including a C exception. Such a handler must be the last handler for its try-block.