Add a complete-command command to configure command completion

This makes it possible to change command completion in hooks and
paves the way to more flexibility in how custom commands can be
completed

1 files changed, 19 insertions, 0 deletions

diff --git a/src/string.hh b/src/string.hh
index d14929f4..c3e7401f 100644
--- a/src/string.hh
+++ b/src/string.hh
@@ -67,6 +67,9 @@ public:
     [[gnu::always_inline]]
     bool empty() const { return type().length() == 0_byte; }
 
+    bool starts_with(StringView str) const;
+    bool ends_with(StringView str) const;
+
     ByteCount byte_count_to(CharCount count) const
     { return utf8::advance(begin(), end(), count) - begin(); }
 
@@ -306,6 +309,22 @@ inline StringView StringOps<Type, CharType>::substr(ColumnCount from, ColumnCoun
     return StringView{ beg, utf8::advance(beg, end(), length) };
 }
 
+template<typename Type, typename CharType>
+inline bool StringOps<Type, CharType>::starts_with(StringView str) const
+{
+    if (type().length() < str.length())
+        return false;
+    return substr(0, str.length()) == str;
+}
+
+template<typename Type, typename CharType>
+inline bool StringOps<Type, CharType>::ends_with(StringView str) const
+{
+    if (type().length() < str.length())
+        return false;
+    return substr(type().length() - str.length()) == str;
+}
+
 inline String& operator+=(String& lhs, StringView rhs)
 {
     lhs.append(rhs.data(), rhs.length());