[#bsl-basic_istringstream-peek]
= xref:bsl.adoc[bsl]::xref:bsl/basic_istringstream.adoc[basic_istringstream]::peek
:relfileprefix: ../../
:mrdocs:

Looking ahead in the stream

== Synopsis

Declared in `<bslstl_istringstream.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int_type
peek();
----

== Description

If, after constructing the sentry object, `good()` is false, returns `traits::eof().` Otherwise reads but does not extract the next input character.

== Return Value

The next character, or eof().


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