diff --git a/meson.build b/meson.build
index 82a6252..ae95b03 100644
--- a/meson.build
+++ b/meson.build
@@ -18,13 +18,11 @@ dyaml_src = [
     'source/dyaml/escapes.d',
     'source/dyaml/event.d',
     'source/dyaml/exception.d',
-    'source/dyaml/fastcharsearch.d',
     'source/dyaml/flags.d',
     'source/dyaml/hacks.d',
     'source/dyaml/linebreak.d',
     'source/dyaml/loader.d',
     'source/dyaml/node.d',
-    'source/dyaml/nogcutil.d',
     'source/dyaml/package.d',
     'source/dyaml/parser.d',
     'source/dyaml/queue.d',
@@ -46,8 +44,7 @@ dyaml_src = [
     'source/dyaml/test/representer.d',
     'source/dyaml/test/resolver.d',
     'source/dyaml/test/tokens.d',
-    'source/dyaml/token.d',
-    'source/dyaml/unused.d'
+    'source/dyaml/token.d'
 ]
 install_subdir('source/dyaml', install_dir: 'include/d/yaml/')
 
diff --git a/source/dyaml/constructor.d b/source/dyaml/constructor.d
index 58276b1..2396f6c 100644
--- a/source/dyaml/constructor.d
+++ b/source/dyaml/constructor.d
@@ -100,17 +100,6 @@ final class Constructor
             addConstructorScalar("tag:yaml.org,2002:merge",     &constructMerge);
         }
 
-        /// Destroy the constructor.
-        @nogc pure @safe nothrow ~this()
-        {
-            fromScalar_.destroy();
-            fromScalar_ = null;
-            fromSequence_.destroy();
-            fromSequence_ = null;
-            fromMapping_.destroy();
-            fromMapping_ = null;
-        }
-
         /** Add a constructor function from scalar.
          *
          * The function must take a reference to $(D Node) to construct from.
diff --git a/source/dyaml/emitter.d b/source/dyaml/emitter.d
index 6fba0fa..0df59a5 100644
--- a/source/dyaml/emitter.d
+++ b/source/dyaml/emitter.d
@@ -29,7 +29,6 @@ import dyaml.encoding;
 import dyaml.escapes;
 import dyaml.event;
 import dyaml.exception;
-import dyaml.fastcharsearch;
 import dyaml.flags;
 import dyaml.linebreak;
 import dyaml.queue;
@@ -61,11 +60,13 @@ struct ScalarAnalysis
            "allowSingleQuoted", "allowDoubleQuoted", "allowBlock", "isNull") flags;
 }
 
-///Quickly determines if a character is a newline.
-private mixin FastCharSearch!"\n\u0085\u2028\u2029"d newlineSearch_;
+private alias isNewLine = among!('\n', '\u0085', '\u2028', '\u2029');
 
-// override the canFind added by the FastCharSearch mixins
-private alias canFind = std.algorithm.canFind;
+private alias isSpecialChar = among!('#', ',', '[', ']', '{', '}', '&', '*', '!', '|', '>', '\\', '\'', '"', '%', '@', '`');
+
+private alias isFlowIndicator = among!(',', '?', '[', ']', '{', '}');
+
+private alias isSpace = among!('\0', '\n', '\r', '\u0085', '\u2028', '\u2029', ' ', '\t');
 
 //Emits YAML events into a file/stream.
 struct Emitter
@@ -1036,14 +1037,11 @@ struct Emitter
 
             foreach(const size_t index, const dchar c; scalar)
             {
-                mixin FastCharSearch!("#,[]{}&*!|>\'\"%@`"d, 128) specialCharSearch;
-                mixin FastCharSearch!(",?[]{}"d, 128) flowIndicatorSearch;
-
                 //Check for indicators.
                 if(index == 0)
                 {
                     //Leading indicators are special characters.
-                    if(specialCharSearch.canFind(c))
+                    if(c.isSpecialChar)
                     {
                         flowIndicators = blockIndicators = true;
                     }
@@ -1060,7 +1058,7 @@ struct Emitter
                 else
                 {
                     //Some indicators cannot appear within a scalar as well.
-                    if(flowIndicatorSearch.canFind(c)){flowIndicators = true;}
+                    if(c.isFlowIndicator){flowIndicators = true;}
                     if(c == ':')
                     {
                         flowIndicators = true;
@@ -1073,7 +1071,7 @@ struct Emitter
                 }
 
                 //Check for line breaks, special, and unicode characters.
-                if(newlineSearch_.canFind(c)){lineBreaks = true;}
+                if(c.isNewLine){lineBreaks = true;}
                 if(!(c == '\n' || (c >= '\x20' && c <= '\x7E')) &&
                    !((c == '\u0085' || (c >= '\xA0' && c <= '\uD7FF') ||
                      (c >= '\uE000' && c <= '\uFFFD')) && c != '\uFEFF'))
@@ -1090,7 +1088,7 @@ struct Emitter
                     previousSpace = true;
                     previousBreak = false;
                 }
-                else if(newlineSearch_.canFind(c))
+                else if(c.isNewLine)
                 {
                     if(index == 0){leadingBreak = true;}
                     if(index == scalar.length - 1){trailingBreak = true;}
@@ -1103,11 +1101,10 @@ struct Emitter
                     previousSpace = previousBreak = false;
                 }
 
-                mixin FastCharSearch! "\0\n\r\u0085\u2028\u2029 \t"d spaceSearch;
                 //Prepare for the next character.
-                preceededByWhitespace = spaceSearch.canFind(c);
+                preceededByWhitespace = c.isSpace != 0;
                 followedByWhitespace = index + 2 >= scalar.length ||
-                                       spaceSearch.canFind(scalar[index + 2]);
+                                       scalar[index + 2].isSpace;
             }
 
             with(analysis.flags)
@@ -1347,14 +1344,14 @@ struct ScalarWriter
                 }
                 else if(breaks_)
                 {
-                    if(!newlineSearch_.canFind(c))
+                    if(!c.isNewLine)
                     {
                         writeStartLineBreak();
                         writeLineBreaks();
                         emitter_.writeIndent();
                     }
                 }
-                else if((c == dcharNone || c == '\'' || c == ' ' || newlineSearch_.canFind(c))
+                else if((c == dcharNone || c == '\'' || c == ' ' || c.isNewLine)
                         && startChar_ < endChar_)
                 {
                     writeCurrentRange(Flag!"UpdateColumn".yes);
@@ -1448,7 +1445,7 @@ struct ScalarWriter
                 const dchar c = nextChar();
                 if(breaks_)
                 {
-                    if(!newlineSearch_.canFind(c))
+                    if(!c.isNewLine)
                     {
                         if(!leadingSpace && c != dcharNone && c != ' ')
                         {
@@ -1471,7 +1468,7 @@ struct ScalarWriter
                         writeCurrentRange(Flag!"UpdateColumn".yes);
                     }
                 }
-                else if(c == dcharNone || newlineSearch_.canFind(c) || c == ' ')
+                else if(c == dcharNone || c.isNewLine || c == ' ')
                 {
                     writeCurrentRange(Flag!"UpdateColumn".yes);
                     if(c == dcharNone){emitter_.writeLineBreak();}
@@ -1492,13 +1489,13 @@ struct ScalarWriter
                 const dchar c = nextChar();
                 if(breaks_)
                 {
-                    if(!newlineSearch_.canFind(c))
+                    if(!c.isNewLine)
                     {
                         writeLineBreaks();
                         if(c != dcharNone){emitter_.writeIndent();}
                     }
                 }
-                else if(c == dcharNone || newlineSearch_.canFind(c))
+                else if(c == dcharNone || c.isNewLine)
                 {
                     writeCurrentRange(Flag!"UpdateColumn".no);
                     if(c == dcharNone){emitter_.writeLineBreak();}
@@ -1538,14 +1535,14 @@ struct ScalarWriter
                 }
                 else if(breaks_)
                 {
-                    if(!newlineSearch_.canFind(c))
+                    if(!c.isNewLine)
                     {
                         writeStartLineBreak();
                         writeLineBreaks();
                         writeIndent(Flag!"ResetSpace".yes);
                     }
                 }
-                else if(c == dcharNone || newlineSearch_.canFind(c) || c == ' ')
+                else if(c == dcharNone || c.isNewLine || c == ' ')
                 {
                     writeCurrentRange(Flag!"UpdateColumn".yes);
                 }
@@ -1600,15 +1597,15 @@ struct ScalarWriter
             const last = lastChar(text_, end);
             const secondLast = end > 0 ? lastChar(text_, end) : 0;
 
-            if(newlineSearch_.canFind(text_[0]) || text_[0] == ' ')
+            if(text_[0].isNewLine || text_[0] == ' ')
             {
                 hints[hintsIdx++] = cast(char)('0' + bestIndent);
             }
-            if(!newlineSearch_.canFind(last))
+            if(!last.isNewLine)
             {
                 hints[hintsIdx++] = '-';
             }
-            else if(std.utf.count(text_) == 1 || newlineSearch_.canFind(secondLast))
+            else if(std.utf.count(text_) == 1 || secondLast.isNewLine)
             {
                 hints[hintsIdx++] = '+';
             }
@@ -1680,7 +1677,7 @@ struct ScalarWriter
         void updateBreaks(in dchar c, const Flag!"UpdateSpaces" updateSpaces) pure @safe
         {
             if(c == dcharNone){return;}
-            breaks_ = newlineSearch_.canFind(c);
+            breaks_ = (c.isNewLine != 0);
             if(updateSpaces){spaces_ = c == ' ';}
         }
 
diff --git a/source/dyaml/fastcharsearch.d b/source/dyaml/fastcharsearch.d
deleted file mode 100644
index 8d524fd..0000000
--- a/source/dyaml/fastcharsearch.d
+++ /dev/null
@@ -1,95 +0,0 @@
-
-//          Copyright Ferdinand Majerech 2011.
-// Distributed under the Boost Software License, Version 1.0.
-//    (See accompanying file LICENSE_1_0.txt or copy at
-//          http://www.boost.org/LICENSE_1_0.txt)
-
-module dyaml.fastcharsearch;
-
-
-import std.algorithm;
-import std.conv;
-
-
-package:
-
-/**
- * Mixin used for fast searching for a character in string.
- *
- * Creates a lookup table to quickly determine if a character
- * is present in the string. Size of the lookup table is limited;
- * any characters not represented in the table will be checked
- * by ordinary equality comparison.
- *
- * Params:  chars     = String to search in.
- *          tableSize = Maximum number of bytes used by the table.
- *
- * Generated method:
- *     bool canFind(dchar c)
- *
- *     Determines if a character is in the string.
- */
-template FastCharSearch(dstring chars, uint tableSize = 256)
-{
-    private mixin(searchCode!(chars, tableSize)());
-}
-
-/// Generate the search table and the canFind method.
-string searchCode(dstring chars, uint tableSize)()
-{
-    import std.string;
-
-    const tableSizeStr = tableSize.to!string;
-    ubyte[tableSize] table;
-    table[] = 0;
-
-    //Characters that don't fit in the table.
-    dchar[] specialChars;
-
-    foreach(c; chars)
-    {
-        if(c < tableSize) { table[c] = 1; }
-        else              { specialChars ~= c; }
-    }
-
-    string specialCharsCode()
-    {
-        return specialChars.map!(c => q{cast(uint)c == %s}.format(cast(uint)c)).join(q{ || });
-    }
-
-    const caseInTable =
-    q{
-            if(c < %s)
-            {
-                return cast(immutable(bool))table_[c];
-            }
-    }.format(tableSize);
-
-    string code;
-    if(tableSize)
-    {
-        code ~=
-        q{
-            static immutable ubyte[%s] table_ = [
-            %s];
-        }.format(tableSize, table[].map!(c => c ? q{true} : q{false}).join(q{, }));
-    }
-    code ~=
-    q{
-        bool canFind(const dchar c) @safe pure nothrow @nogc
-        {
-            %s
-
-            return %s;
-        }
-    }.format(tableSize ? caseInTable : "",
-             specialChars.length ? specialCharsCode() : q{false});
-
-    return code;
-}
-
-@safe unittest
-{
-    mixin FastCharSearch!("+", 128) search;
-    assert(search.canFind('+'));
-}
diff --git a/source/dyaml/loader.d b/source/dyaml/loader.d
index 2e07b2d..dcd4da8 100644
--- a/source/dyaml/loader.d
+++ b/source/dyaml/loader.d
@@ -126,13 +126,6 @@ struct Loader
             }
         }
 
-        /// Destroy the Loader.
-        @trusted ~this()
-        {
-            reader_.destroy();
-            scanner_.destroy();
-            parser_.destroy();
-        }
 
         /// Set stream _name. Used in debugging messages.
         void name(string name) pure @safe nothrow @nogc
diff --git a/source/dyaml/nogcutil.d b/source/dyaml/nogcutil.d
deleted file mode 100644
index 8b2bcf6..0000000
--- a/source/dyaml/nogcutil.d
+++ /dev/null
@@ -1,451 +0,0 @@
-// Copyright Ferdinand Majerech 2014, Digital Mars 2000-2012, Andrei Alexandrescu 2008- and Jonathan M Davis 2011-.
-// Distributed under the Boost Software License, Version 1.0.
-//    (See accompanying file LICENSE_1_0.txt or copy at
-//          http://www.boost.org/LICENSE_1_0.txt)
-
-
-/// @nogc versions of or alternatives to Phobos functions that are not yet @nogc and
-/// wrappers to simplify their use.
-module dyaml.nogcutil;
-
-
-
-import std.traits;
-import std.typecons;
-import std.typetuple;
-import std.range;
-
-
-
-/// A NoGC version of std.conv.parse for integer types.
-///
-/// Differences:
-///    overflow parameter - bool set to true if there was integer overflow.
-///    Asserts that at least one character was parsed instead of throwing an exception.
-///    The caller must validate the inputs before calling parseNoGC.
-Target parseNoGC(Target, Source)(ref Source s, uint radix, out bool overflow)
-    @safe pure nothrow @nogc
-    if (isSomeChar!(ElementType!Source) &&
-        isIntegral!Target && !is(Target == enum))
-in { assert(radix >= 2 && radix <= 36); }
-body
-{
-    immutable uint beyond = (radix < 10 ? '0' : 'a'-10) + radix;
-
-    Target v = 0;
-    size_t atStart = true;
-
-    // We can safely foreach over individual code points.
-    // Even with UTF-8 any digit is ASCII and anything not ASCII (such as the start of
-    // a UTF-8 sequence) is not a digit.
-    foreach(i; 0 .. s.length)
-    {
-        dchar c = s[i];
-        // We can just take a char instead of decoding because anything non-ASCII is not
-        // going to be a decodable digit, i.e. we will end at such a byte.
-        if (c < '0' || c >= 0x80)
-            break;
-        if (radix < 10)
-        {
-            if (c >= beyond)
-                break;
-        }
-        else
-        {
-            if (c > '9')
-            {
-                c |= 0x20;//poorman's tolower
-                if (c < 'a' || c >= beyond) { break; }
-                c -= 'a'-10-'0';
-            }
-        }
-        auto blah = cast(Target) (v * radix + c - '0');
-        if (blah < v)
-        {
-            overflow = true;
-            return Target.max;
-        }
-        v = blah;
-        atStart = false;
-    }
-    assert(!atStart, "Nothing to parse in parse()");
-    return v;
-}
-
-
-/// Buils a message to a buffer similarly to writef/writefln, but without
-/// using GC.
-///
-/// C snprintf would be better, but it isn't pure.
-/// formattedWrite isn't completely @nogc yet (although it isn't GC-heavy).
-///
-/// The user has to ensure buffer is long enough - an assert checks that we don't run
-/// out of space. Currently this can only write strings and dchars.
-char[] printNoGC(S...)(char[] buffer, S args) @safe pure nothrow @nogc
-{
-    auto appender = appenderNoGC(buffer);
-
-    foreach(arg; args)
-    {
-        alias A = typeof(arg);
-        static if(is(A == char[]) || is(A == string)) { appender.put(arg); }
-        else static if(is(Unqual!A == dchar))         { appender.putDChar(arg); }
-        else static assert(false, "printNoGC does not support " ~ A.stringof);
-    }
-
-    return appender.data;
-}
-
-
-/// A UFCS utility function to write a dchar to an AppenderNoGCFixed using writeDCharTo.
-///
-/// The char $(B must) be a valid dchar.
-void putDChar(ref AppenderNoGCFixed!(char[], char) appender, dchar c)
-    @safe pure nothrow @nogc
-{
-    char[4] dcharBuf;
-    if(c < 0x80)
-    {
-        dcharBuf[0] = cast(char)c;
-        appender.put(dcharBuf[0 .. 1]);
-        return;
-    }
-    // Should be safe to use as the first thing Reader does is validate everything.
-    const bytes = encodeValidCharNoGC(dcharBuf, c);
-    appender.put(dcharBuf[0 .. bytes]);
-}
-
-/// Convenience function that returns an $(D AppenderNoGCFixed!A) using with $(D array)
-/// for storage.
-AppenderNoGCFixed!(E[]) appenderNoGC(A : E[], E)(A array)
-{
-    return AppenderNoGCFixed!(E[])(array);
-}
-
-/// A gutted, NoGC version of std.array.appender.
-///
-/// Works on a fixed-size buffer.
-struct AppenderNoGCFixed(A : T[], T)
-{
-    import std.array;
-
-    private struct Data
-    {
-        size_t capacity;
-        Unqual!T[] arr;
-        bool canExtend = false;
-    }
-
-    private Data _data;
-
-    @nogc:
-
-    /// Construct an appender that will work with given buffer.
-    ///
-    /// Data written to the appender will overwrite the buffer from the start.
-    this(T[] arr) @safe pure nothrow
-    {
-        // initialize to a given array.
-        _data.arr = cast(Unqual!T[])arr[0 .. 0]; //trusted
-        _data.capacity = arr.length;
-    }
-
-    /**
-     * Returns the capacity of the array (the maximum number of elements the
-     * managed array can accommodate before triggering a reallocation).  If any
-     * appending will reallocate, $(D capacity) returns $(D 0).
-     */
-    @property size_t capacity() const @safe pure nothrow
-    {
-        return _data.capacity;
-    }
-
-    /**
-     * Returns the managed array.
-     */
-    @property inout(T)[] data() inout @safe pure nothrow
-    {
-        return cast(typeof(return))(_data.arr);
-    }
-
-    // ensure we can add nelems elements, resizing as necessary
-    private void ensureAddable(size_t nelems) @safe pure nothrow
-    {
-        assert(_data.capacity >= _data.arr.length + nelems,
-                "AppenderFixed ran out of space");
-    }
-
-    void put(U)(U[] items) if (is(Unqual!U == T))
-    {
-        // make sure we have enough space, then add the items
-        ensureAddable(items.length);
-        immutable len = _data.arr.length;
-        immutable newlen = len + items.length;
-
-        auto bigDataFun() @trusted nothrow { return _data.arr.ptr[0 .. newlen];}
-        auto bigData = bigDataFun();
-
-        alias UT = Unqual!T;
-
-        bigData[len .. newlen] = items[];
-
-        //We do this at the end, in case of exceptions
-        _data.arr = bigData;
-    }
-
-    // only allow overwriting data on non-immutable and non-const data
-    static if (isMutable!T)
-    {
-        /**
-         * Clears the managed array.  This allows the elements of the array to be reused
-         * for appending.
-         *
-         * Note that clear is disabled for immutable or const element types, due to the
-         * possibility that $(D AppenderNoGCFixed) might overwrite immutable data.
-         */
-        void clear() @safe pure nothrow
-        {
-            _data.arr = ()@trusted{ return _data.arr.ptr[0 .. 0]; }();
-        }
-    }
-    else
-    {
-        /// Clear is not available for const/immutable data.
-        @disable void clear();
-    }
-}
-@safe unittest
-{
-    char[256] buffer;
-    auto appender = appenderNoGC(buffer[]);
-    appender.put("found unsupported escape character: ");
-    appender.putDChar('a');
-    appender.putDChar('á');
-    assert(appender.data == "found unsupported escape character: aá");
-}
-
-
-/// Result of a validateUTF8NoGC call.
-struct ValidateResult
-{
-    /// Is the validated string valid?
-    bool   valid;
-    /// Number of characters in the string.
-    ///
-    /// If the string is not valid, this is the number of valid characters before
-    /// hitting the first invalid sequence.
-    size_t characterCount;
-    /// If the string is not valid, error message with details is here.
-    string msg;
-}
-
-/// Validate a UTF-8 string, checking if it is well-formed Unicode.
-///
-/// See_Also: ValidateResult
-ValidateResult validateUTF8NoGC(const(char[]) str) @safe pure nothrow @nogc
-{
-    immutable len = str.length;
-    size_t characterCount;
-    outer: for (size_t index = 0; index < len; )
-    {
-        if(str[index] < 0x80)
-        {
-            ++index;
-            ++characterCount;
-            continue;
-        }
-
-        auto decoded = decodeUTF8NoGC!(No.validated)(str, index);
-        if(decoded.errorMessage !is null)
-        {
-            return ValidateResult(false, characterCount, decoded.errorMessage);
-        }
-        ++characterCount;
-    }
-
-    return ValidateResult(true, characterCount);
-}
-
-/// @nogc version of std.utf.decode() for char[].
-///
-/// The caller $(B must) handle ASCII (< 0x80) characters manually; this is asserted to
-/// force code using this function to be efficient.
-///
-/// Params:
-///
-/// validated = If ture, assume str is a valid UTF-8 string and don't generate any
-///             error-checking code. If validated is true, str $(B must) be a valid
-///             character, otherwise undefined behavior will occur. Also affects the
-///             return type.
-/// str       = Will decode the first code point from this string.
-/// index     = Index in str where the code point starts. Will be updated to point to
-///             the next code point.
-///
-/// Returns: If validated is true, the decoded character.
-///          Otherwise a struct with a 'decoded' member - the decoded character, and a
-///          'string errorMessage' member that is null on success and otherwise stores
-///          the error message.
-auto decodeUTF8NoGC(Flag!"validated" validated)(const(char[]) str, ref size_t index)
-{
-    static if(!validated) struct Result
-    {
-        dchar decoded;
-        string errorMessage;
-    }
-    else alias Result = dchar;
-
-    /// Dchar bitmask for different numbers of UTF-8 code units.
-    enum bitMask     = tuple((1 << 7) - 1, (1 << 11) - 1, (1 << 16) - 1, (1 << 21) - 1);
-
-    auto pstr = str[index..$];
-
-    immutable length = str.length - index;
-    ubyte fst = pstr[0];
-
-    assert(fst & 0x80);
-    enum invalidUTFMsg = "Invalid UTF-8 sequence";
-    static if(!validated) { enum invalidUTF = Result(cast(dchar)int.max, invalidUTFMsg); }
-
-    // starter must have at least 2 first bits set
-    static if(validated)
-    {
-        assert((fst & 0b1100_0000) == 0b1100_0000, invalidUTFMsg);
-    }
-    else if((fst & 0b1100_0000) != 0b1100_0000)
-    {
-        return invalidUTF;
-    }
-
-    ubyte tmp = void;
-    dchar d = fst; // upper control bits are masked out later
-    fst <<= 1;
-
-
-    foreach (i; TypeTuple!(1, 2, 3))
-    {
-        static if(validated) { assert(i != length, "Decoding out of bounds"); }
-        else if(i == length) { return Result(cast(dchar)int.max, "Decoding out of bounds"); }
-
-        tmp = pstr[i];
-        static if(validated)          { assert((tmp & 0xC0) == 0x80, invalidUTFMsg); }
-        else if((tmp & 0xC0) != 0x80) { return invalidUTF; }
-
-        d = (d << 6) | (tmp & 0x3F);
-        fst <<= 1;
-
-        if (!(fst & 0x80)) // no more bytes
-        {
-            d &= bitMask[i]; // mask out control bits
-
-            // overlong, could have been encoded with i bytes
-            static if(validated) { assert((d & ~bitMask[i - 1]) != 0, invalidUTFMsg); }
-            else if((d & ~bitMask[i - 1]) == 0) { return invalidUTF; }
-
-            // check for surrogates only needed for 3 bytes
-            static if (i == 2)
-            {
-                static if(validated)      { assert(isValidDchar(d), invalidUTFMsg); }
-                else if(!isValidDchar(d)) { return invalidUTF; }
-            }
-
-            index += i + 1;
-            static if (i == 3)
-            {
-                static if(validated)   { assert(d <= dchar.max, invalidUTFMsg); }
-                else if(d > dchar.max) { return invalidUTF; }
-            }
-
-            return Result(d);
-        }
-    }
-
-    static if(validated) { assert(false, invalidUTFMsg); }
-    else                 { return invalidUTF; }
-}
-
-/// ditto
-alias decodeValidUTF8NoGC = decodeUTF8NoGC!(Yes.validated);
-
-/// @nogc version of std.utf.encode() for char[].
-///
-/// The caller $(B must) handle ASCII (< 0x80) characters manually; this is asserted to
-/// force code using this function to be efficient.
-///
-/// Params:
-/// validated = If true, asssume c is a valid, non-surrogate UTF-32 code point and don't
-///             generate any error-checking code. If validated is true, c $(B must) be
-///             a valid character, otherwise undefined behavior will occur. Also affects
-///             the return type.
-/// buf       = Buffer to write the encoded result to.
-/// c         = Character to encode.
-///
-/// Returns: If validated is true, number of bytes the encoded character takes up in buf.
-///          Otherwise a struct with a 'bytes' member specifying the number of bytes of
-///          the endocded character, and a 'string errorMessage' member that is null
-///          if there was no error and otherwise stores the error message.
-auto encodeCharNoGC(Flag!"validated" validated)(ref char[4] buf, dchar c)
-    @safe pure nothrow @nogc
-{
-    static if(!validated) struct Result
-    {
-        size_t bytes;
-        string errorMessage;
-    }
-    else alias Result = size_t;
-
-    // Force the caller to optimize ASCII (the 1-byte case)
-    assert(c >= 0x80, "Caller should explicitly handle ASCII chars");
-    if (c <= 0x7FF)
-    {
-        assert(isValidDchar(c));
-        buf[0] = cast(char)(0xC0 | (c >> 6));
-        buf[1] = cast(char)(0x80 | (c & 0x3F));
-        return Result(2);
-    }
-    if (c <= 0xFFFF)
-    {
-        static if(validated)
-        {
-            assert(0xD800 > c || c > 0xDFFF,
-                   "Supposedly valid code point is a surrogate code point");
-        }
-        else if(0xD800 <= c && c <= 0xDFFF)
-        {
-            return Result(size_t.max, "Can't encode a surrogate code point in UTF-8");
-        }
-
-        assert(isValidDchar(c));
-        buf[0] = cast(char)(0xE0 | (c >> 12));
-        buf[1] = cast(char)(0x80 | ((c >> 6) & 0x3F));
-        buf[2] = cast(char)(0x80 | (c & 0x3F));
-        return Result(3);
-    }
-    if (c <= 0x10FFFF)
-    {
-        assert(isValidDchar(c));
-        buf[0] = cast(char)(0xF0 | (c >> 18));
-        buf[1] = cast(char)(0x80 | ((c >> 12) & 0x3F));
-        buf[2] = cast(char)(0x80 | ((c >> 6) & 0x3F));
-        buf[3] = cast(char)(0x80 | (c & 0x3F));
-        return Result(4);
-    }
-
-    assert(!isValidDchar(c));
-    static if(!validated)
-    {
-        return Result(size_t.max, "Can't encode an invalid code point in UTF-8");
-    }
-    else
-    {
-        assert(false, "Supposedly valid code point is invalid");
-    }
-}
-
-/// ditto
-alias encodeValidCharNoGC = encodeCharNoGC!(Yes.validated);
-
-/// @nogc version of std.utf.isValidDchar
-bool isValidDchar(dchar c) @safe pure nothrow @nogc
-{
-    return c < 0xD800 || (c > 0xDFFF && c <= 0x10FFFF);
-}
diff --git a/source/dyaml/parser.d b/source/dyaml/parser.d
index 578f205..44437d6 100644
--- a/source/dyaml/parser.d
+++ b/source/dyaml/parser.d
@@ -142,16 +142,6 @@ final class Parser
             marks_.reserve(32);
         }
 
-        ///Destroy the parser.
-        @trusted ~this()
-        {
-            currentEvent_.destroy();
-            tagDirectives_.destroy();
-            tagDirectives_ = null;
-            states_.destroy();
-            marks_.destroy();
-        }
-
         /**
          * Check if the next event is one of specified types.
          *
@@ -538,8 +528,7 @@ final class Parser
         {
             string notInPlace;
             bool inEscape = false;
-            import dyaml.nogcutil;
-            auto appender = appenderNoGC(cast(char[])tokenValue);
+            auto appender = appender!(char[])();
             for(char[] oldValue = tokenValue; !oldValue.empty();)
             {
                 const dchar c = oldValue.front();
@@ -549,7 +538,7 @@ final class Parser
                 {
                     if(c != '\\')
                     {
-                        if(notInPlace is null) { appender.putDChar(c); }
+                        if(notInPlace is null) { appender.put(c); }
                         else                   { notInPlace ~= c; }
                         continue;
                     }
@@ -570,7 +559,7 @@ final class Parser
                         // many-byte unicode chars
                         if(c != 'L' && c != 'P')
                         {
-                            appender.putDChar(dyaml.escapes.fromEscape(c));
+                            appender.put(dyaml.escapes.fromEscape(c));
                             continue;
                         }
                         // Need to duplicate as we won't fit into
@@ -596,10 +585,8 @@ final class Parser
                     assert(!hex.canFind!(d => !d.isHexDigit),
                             "Scanner must ensure the hex string is valid");
 
-                    bool overflow;
-                    const decoded = cast(dchar)parseNoGC!int(hex, 16u, overflow);
-                    assert(!overflow, "Scanner must ensure there's no overflow");
-                    if(notInPlace is null) { appender.putDChar(decoded); }
+                    const decoded = cast(dchar)parse!int(hex, 16u);
+                    if(notInPlace is null) { appender.put(decoded); }
                     else                   { notInPlace ~= decoded; }
                     continue;
                 }
diff --git a/source/dyaml/queue.d b/source/dyaml/queue.d
index 9ce87b9..5024489 100644
--- a/source/dyaml/queue.d
+++ b/source/dyaml/queue.d
@@ -47,9 +47,6 @@ struct Queue(T)
         /// Cursor pointing to the current node in iteration.
         Node* cursor_ = null;
 
-        /// The first element of a linked list of freed Nodes available for recycling.
-        Node* freeList_ = null;
-
         /// Length of the queue.
         size_t length_ = 0;
 
@@ -58,20 +55,6 @@ struct Queue(T)
         @disable bool opEquals(ref Queue);
         @disable int opCmp(ref Queue);
 
-        /// Destroy the queue, deallocating all its elements.
-        @trusted nothrow ~this()
-        {
-            while(!empty) { pop(); }
-            while(freeList_ !is null)
-            {
-                auto toFree = freeList_;
-                freeList_   = toFree.next_;
-                free(toFree);
-            }
-            cursor_ = last_ = first_ = null;
-            length_ = 0;
-        }
-
         /// Start iterating over the queue.
         void startIteration() @safe pure nothrow @nogc
         {
@@ -101,7 +84,7 @@ struct Queue(T)
         /// Push new item to the queue.
         void push(T item) @safe nothrow
         {
-            Node* newLast = newNode(item, null);
+            Node* newLast = new Node(item, null);
             if(last_ !is null) { last_.next_ = newLast; }
             if(first_ is null) { first_      = newLast; }
             last_ = newLast;
@@ -118,7 +101,7 @@ struct Queue(T)
         {
             if(idx == 0)
             {
-                first_ = newNode(item, first_);
+                first_ = new Node(item, first_);
                 ++length_;
             }
             // Adding before last added element, so we can just push.
@@ -130,7 +113,7 @@ struct Queue(T)
                 foreach(i; 1 .. idx) { current = current.next_; }
 
                 // Insert a new node after current, and put current.next_ behind it.
-                current.next_ = newNode(item, current.next_);
+                current.next_ = new Node(item, current.next_);
                 ++length_;
             }
         }
@@ -147,9 +130,6 @@ struct Queue(T)
             Node* popped = first_;
             first_       = first_.next_;
 
-            Node* oldFree   = freeList_;
-            freeList_       = popped;
-            freeList_.next_ = oldFree;
             if(--length_ == 0)
             {
                 assert(first_ is null);
@@ -181,43 +161,6 @@ struct Queue(T)
         {
             return length_;
         }
-
-private:
-        /// Get a new (or recycled) node with specified item and next node pointer.
-        ///
-        /// Tries to reuse a node from freeList_, allocates a new node if not possible.
-        Node* newNode(ref T item, Node* next) @trusted nothrow
-        {
-            if(freeList_ !is null)
-            {
-                auto node = freeList_;
-                freeList_ = freeList_.next_;
-                *node     = Node(item, next);
-                return node;
-            }
-            return allocate!Node(item, next);
-        }
-}
-
-
-private:
-
-/// Allocate a struct, passing arguments to its constructor or default initializer.
-T* allocate(T, Args...)(Args args) @system nothrow
-{
-    T* ptr = cast(T*)malloc(T.sizeof);
-    *ptr = T(args);
-    // The struct might contain references to GC-allocated memory, so tell the GC about it.
-    static if(hasIndirections!T) { GC.addRange(cast(void*)ptr, T.sizeof); }
-    return ptr;
-}
-
-/// Deallocate struct pointed at by specified pointer.
-void free(T)(T* ptr) @system nothrow
-{
-    // GC doesn't need to care about any references in this struct anymore.
-    static if(hasIndirections!T) { GC.removeRange(cast(void*)ptr); }
-    core.stdc.stdlib.free(ptr);
 }
 
 @safe unittest
diff --git a/source/dyaml/reader.d b/source/dyaml/reader.d
index 7ca242a..82e0a3d 100644
--- a/source/dyaml/reader.d
+++ b/source/dyaml/reader.d
@@ -22,12 +22,10 @@ import std.utf;
 
 import tinyendian;
 
-import dyaml.fastcharsearch;
 import dyaml.encoding;
 import dyaml.exception;
-import dyaml.nogcutil;
-
 
+alias isBreak = among!('\n', '\u0085', '\u2028', '\u2029');
 
 package:
 
@@ -133,7 +131,7 @@ final class Reader
         ///
         // XXX removed; search for 'risky' to find why.
         // Throws:  ReaderException if trying to read past the end of the buffer.
-        dchar peek(const size_t index) @safe pure nothrow @nogc
+        dchar peek(const size_t index) @safe pure
         {
             if(index < upcomingASCII_) { return buffer_[bufferOffset_ + index]; }
             if(characterCount_ <= charIndex_ + index)
@@ -159,7 +157,7 @@ final class Reader
                     ++lastDecodedBufferOffset_;
                     return b;
                 }
-                return decodeValidUTF8NoGC(buffer_, lastDecodedBufferOffset_);
+                return decode(buffer_, lastDecodedBufferOffset_);
             }
 
             // 'Slow' path where we decode everything up to the requested character.
@@ -176,7 +174,7 @@ final class Reader
         }
 
         /// Optimized version of peek() for the case where peek index is 0.
-        dchar peek() @safe pure nothrow @nogc
+        dchar peek() @safe pure
         {
             if(upcomingASCII_ > 0)            { return buffer_[bufferOffset_]; }
             if(characterCount_ <= charIndex_) { return '\0'; }
@@ -216,7 +214,7 @@ final class Reader
         ///                  slice will be shorter.
         ///
         /// Returns: Characters starting at current position or an empty slice if out of bounds.
-        char[] prefix(const size_t length) @safe pure nothrow @nogc
+        char[] prefix(const size_t length) @safe pure
         {
             return slice(length);
         }
@@ -249,7 +247,7 @@ final class Reader
         ///                be shorter.
         ///
         /// Returns: Slice into the internal buffer or an empty slice if out of bounds.
-        char[] slice(const size_t end) @safe pure nothrow @nogc
+        char[] slice(const size_t end) @safe pure
         {
             // Fast path in case the caller has already peek()ed all the way to end.
             if(end == lastDecodedCharOffset_)
@@ -277,7 +275,7 @@ final class Reader
         ///
         /// Throws:  ReaderException if trying to read past the end of the buffer
         ///          or if invalid data is read.
-        dchar get() @safe pure nothrow @nogc
+        dchar get() @safe pure
         {
             const result = peek();
             forward();
@@ -289,7 +287,7 @@ final class Reader
         /// Params:  length = Number or characters (code points, not bytes) to get.
         ///
         /// Returns: Characters starting at current position.
-        char[] get(const size_t length) @safe pure nothrow @nogc
+        char[] get(const size_t length) @safe pure
         {
             auto result = slice(length);
             forward(length);
@@ -299,10 +297,8 @@ final class Reader
         /// Move current position forward.
         ///
         /// Params:  length = Number of characters to move position forward.
-        void forward(size_t length) @safe pure nothrow @nogc
+        void forward(size_t length) @safe pure
         {
-            mixin FastCharSearch!"\n\u0085\u2028\u2029"d search;
-
             while(length > 0)
             {
                 auto asciiToTake = min(upcomingASCII_, length);
@@ -336,10 +332,10 @@ final class Reader
                        "ASCII must be handled by preceding code");
 
                 ++charIndex_;
-                const c = decodeValidUTF8NoGC(buffer_, bufferOffset_);
+                const c = decode(buffer_, bufferOffset_);
 
                 // New line. (can compare with '\n' without decoding since it's ASCII)
-                if(search.canFind(c) || (c == '\r' && buffer_[bufferOffset_] != '\n'))
+                if(c.isBreak || (c == '\r' && buffer_[bufferOffset_] != '\n'))
                 {
                     ++line_;
                     column_ = 0;
@@ -354,7 +350,7 @@ final class Reader
         }
 
         /// Move current position forward by one character.
-        void forward() @safe pure nothrow @nogc
+        void forward() @safe pure
         {
             ++charIndex_;
             lastDecodedBufferOffset_ = bufferOffset_;
@@ -377,16 +373,15 @@ final class Reader
             }
 
             // UTF-8
-            mixin FastCharSearch!"\n\u0085\u2028\u2029"d search;
             assert(bufferOffset_ < buffer_.length,
                    "Attempted to decode past the end of YAML buffer");
             assert(buffer_[bufferOffset_] >= 0x80,
                    "ASCII must be handled by preceding code");
 
-            const c = decodeValidUTF8NoGC(buffer_, bufferOffset_);
+            const c = decode(buffer_, bufferOffset_);
 
             // New line. (can compare with '\n' without decoding since it's ASCII)
-            if(search.canFind(c) || (c == '\r' && buffer_[bufferOffset_] != '\n'))
+            if(c.isBreak || (c == '\r' && buffer_[bufferOffset_] != '\n'))
             {
                 ++line_;
                 column_ = 0;
@@ -425,7 +420,7 @@ private:
         // lastDecodedCharOffset_/lastDecodedBufferOffset_ and update them.
         //
         // Does not advance the buffer position. Used in peek() and slice().
-        dchar decodeNext() @safe pure nothrow @nogc
+        dchar decodeNext() @safe pure
         {
             assert(lastDecodedBufferOffset_ < buffer_.length,
                    "Attempted to decode past the end of YAML buffer");
@@ -438,7 +433,7 @@ private:
                 return b;
             }
 
-            return decodeValidUTF8NoGC(buffer_, lastDecodedBufferOffset_);
+            return decode(buffer_, lastDecodedBufferOffset_);
         }
 }
 
@@ -558,7 +553,7 @@ public:
     /// Data can only be written up to the current position in the Reader buffer.
     ///
     /// See_Also: begin
-    void write(dchar c) @safe pure nothrow @nogc
+    void write(dchar c) @safe pure
     {
         assert(inProgress, "write called without begin");
         if(c < 0x80)
@@ -569,7 +564,7 @@ public:
 
         // We need to encode a non-ASCII dchar into UTF-8
         char[4] encodeBuf;
-        const bytes = encodeValidCharNoGC(encodeBuf, c);
+        const bytes = encode(encodeBuf, c);
         reader_.buffer_[end_ .. end_ + bytes] = encodeBuf[0 .. bytes];
         end_ += bytes;
     }
@@ -585,7 +580,7 @@ public:
     /// position = Position to insert the character at in code units, not code points.
     ///            Must be less than slice length(); a previously returned length()
     ///            can be used.
-    void insert(const dchar c, const size_t position) @safe pure nothrow @nogc
+    void insert(const dchar c, const size_t position) @safe pure
     {
         assert(inProgress, "insert called without begin");
         assert(start_ + position <= end_, "Trying to insert after the end of the slice");
@@ -596,7 +591,7 @@ public:
         // Encode c into UTF-8
         char[4] encodeBuf;
         if(c < 0x80) { encodeBuf[0] = cast(char)c; }
-        const size_t bytes = c < 0x80 ? 1 : encodeValidCharNoGC(encodeBuf, c);
+        const size_t bytes = c < 0x80 ? 1 : encode(encodeBuf, c);
 
         if(movedLength > 0)
         {
@@ -660,16 +655,14 @@ public:
         }
 
         /// Destroy the transaction and revert it if it hasn't been committed yet.
-        ///
-        /// Does nothing for a default-initialized transaction.
-        ~this() @safe pure nothrow @nogc
+        void end() @safe pure nothrow @nogc
         {
-            if(builder_ is null || committed_) { return; }
-            assert(builder_.endStackUsed_ == stackLevel_ + 1,
+            assert(builder_ && builder_.endStackUsed_ == stackLevel_ + 1,
                    "Parent transactions don't fully contain child transactions");
             builder_.pop();
             builder_ = null;
         }
+
     }
 
 private:
@@ -765,13 +758,8 @@ auto toUTF8(ubyte[] input, const UTFEncoding encoding) @safe pure nothrow
                     continue;
                 }
 
-                const encodeResult = encodeCharNoGC!(No.validated)(encodeBuf, c);
-                if(encodeResult.errorMessage !is null)
-                {
-                    result.errorMessage = encodeResult.errorMessage;
-                    return;
-                }
-                const bytes = encodeResult.bytes;
+                std.utf.encode(encodeBuf, c);
+                const bytes = codeLength!char(c);
                 utf8[length .. length + bytes] = encodeBuf[0 .. bytes];
                 length += bytes;
             }
@@ -789,14 +777,8 @@ auto toUTF8(ubyte[] input, const UTFEncoding encoding) @safe pure nothrow
     {
         case UTFEncoding.UTF_8:
             result.utf8 = cast(char[])input;
-            const validateResult = result.utf8.validateUTF8NoGC();
-            if(!validateResult.valid)
-            {
-                result.errorMessage = "UTF-8 validation error after character #" ~
-                                      validateResult.characterCount.to!string ~ ": " ~
-                                      validateResult.msg;
-            }
-            result.characterCount = validateResult.characterCount;
+            result.utf8.validate();
+            result.characterCount = std.utf.count(result.utf8);
             break;
         case UTFEncoding.UTF_16:
             assert(input.length % 2 == 0, "UTF-16 buffer size must be even");
@@ -818,7 +800,7 @@ auto toUTF8(ubyte[] input, const UTFEncoding encoding) @safe pure nothrow
 }
 
 /// Determine if all characters (code points, not bytes) in a string are printable.
-bool isPrintableValidUTF8(const char[] chars) @safe pure nothrow @nogc
+bool isPrintableValidUTF8(const char[] chars) @safe pure
 {
     // This is oversized (only 128 entries are necessary) simply because having 256
     // entries improves performance... for some reason (alignment?)
@@ -918,7 +900,7 @@ bool isPrintableValidUTF8(const char[] chars) @safe pure nothrow @nogc
         if(index == chars.length) { break; }
 
         // Not ASCII, need to decode.
-        const dchar c = decodeValidUTF8NoGC(chars, index);
+        const dchar c = decode(chars, index);
         // We now c is not ASCII, so only check for printable non-ASCII chars.
         if(!(c == 0x85 || (c >= 0xA0 && c <= '\uD7FF') ||
             (c >= '\uE000' && c <= '\uFFFD') ||
diff --git a/source/dyaml/representer.d b/source/dyaml/representer.d
index 0dac787..f31cd78 100644
--- a/source/dyaml/representer.d
+++ b/source/dyaml/representer.d
@@ -81,13 +81,6 @@ final class Representer
             addRepresenter!SysTime(&representSysTime);
         }
 
-        ///Destroy the Representer.
-        ~this() pure @safe nothrow
-        {
-            representers_.destroy();
-            representers_ = null;
-        }
-
         ///Set default _style for scalars. If style is $(D ScalarStyle.Invalid), the _style is chosen automatically.
         @property void defaultScalarStyle(ScalarStyle style) pure @safe nothrow
         {
diff --git a/source/dyaml/resolver.d b/source/dyaml/resolver.d
index 1d4bda8..5eae47f 100644
--- a/source/dyaml/resolver.d
+++ b/source/dyaml/resolver.d
@@ -68,13 +68,6 @@ final class Resolver
             if(defaultImplicitResolvers){addImplicitResolvers();}
         }
 
-        ///Destroy the Resolver.
-        ~this() pure @safe nothrow
-        {
-            yamlImplicitResolvers_.destroy();
-            yamlImplicitResolvers_ = null;
-        }
-
         /**
          * Add an implicit scalar resolver.
          *
diff --git a/source/dyaml/scanner.d b/source/dyaml/scanner.d
index df0b2f9..1babf99 100644
--- a/source/dyaml/scanner.d
+++ b/source/dyaml/scanner.d
@@ -20,11 +20,10 @@ import std.exception;
 import std.string;
 import std.typecons;
 import std.traits : Unqual;
+import std.utf;
 
-import dyaml.fastcharsearch;
 import dyaml.escapes;
 import dyaml.exception;
-import dyaml.nogcutil;
 import dyaml.queue;
 import dyaml.reader;
 import dyaml.style;
@@ -53,6 +52,21 @@ package:
 /// TAG(value)
 /// SCALAR(value, plain, style)
 
+alias isBreak = among!('\0', '\n', '\r', '\u0085', '\u2028', '\u2029');
+
+alias isBreakOrSpace = among!(' ', '\0', '\n', '\r', '\u0085', '\u2028', '\u2029');
+
+alias isWhiteSpace = among!(' ', '\t', '\0', '\n', '\r', '\u0085', '\u2028', '\u2029');
+
+alias isNonScalarStartCharacter = among!('-', '?', ':', ',', '[', ']', '{', '}', '#', '&', '*', '!', '|', '>', '\'', '"', '%', '@', '`', ' ', '\t', '\0', '\n', '\r', '\u0085', '\u2028', '\u2029');
+
+alias isURIChar = among!('-', ';', '/', '?', ':', '@', '&', '=', '+', '$', ',', '_', '.', '!', '~', '*', '\'', '(', ')', '[', ']', '%');
+
+alias isNSChar = among!(' ', '\n', '\r', '\u0085', '\u2028', '\u2029');
+
+alias isBChar = among!('\n', '\r', '\u0085', '\u2028', '\u2029');
+
+alias isFlowScalarBreakSpace = among!(' ', '\t', '\0', '\n', '\r', '\u0085', '\u2028', '\u2029', '\'', '"', '\\');
 
 /// Marked exception thrown at scanner errors.
 ///
@@ -153,14 +167,6 @@ final class Scanner
         /// not.
         char[256] msgBuffer_;
 
-        /// Used to detect if a character is any whitespace plus '\0'
-        mixin FastCharSearch!" \t\0\n\r\u0085\u2028\u2029"d searchAllWhitespace;
-        /// Used to detect if a character is any line break plus '\0'
-        mixin FastCharSearch!"\0\n\r\u0085\u2028\u2029"d searchAllBreaks;
-
-        /// Avoids compiler confusion of std.algorithm.canFind with FastCharSearch.
-        alias canFind = std.algorithm.canFind;
-
     public:
         /// Construct a Scanner using specified Reader.
         this(Reader reader) @safe nothrow
@@ -170,16 +176,6 @@ final class Scanner
             fetchStreamStart();
         }
 
-        /// Destroy the scanner.
-        ~this() @trusted
-        {
-            tokens_.destroy();
-            indents_.destroy();
-            possibleSimpleKeys_.destroy();
-            possibleSimpleKeys_ = null;
-            reader_ = null;
-        }
-
         /// Check if the next token is one of specified types.
         ///
         /// If no types are specified, checks if any tokens are left.
@@ -235,7 +231,13 @@ final class Scanner
         /// Build an error message in msgBuffer_ and return it as a string.
         string buildMsg(S ...)(S args) @trusted
         {
-            return cast(string)msgBuffer_.printNoGC(args);
+            try {
+                return text(args);
+            }
+            catch (Exception)
+            {
+                return "";
+            }
         }
 
         /// Most scanning error messages have the same format; so build them with this
@@ -739,7 +741,7 @@ final class Scanner
             tokens_.push(plain);
         }
 
-    pure nothrow @nogc:
+    pure:
 
         ///Check if the next token is DIRECTIVE:        ^ '%' ...
         bool checkDirective() @safe
@@ -754,7 +756,7 @@ final class Scanner
             return reader_.column     == 0     &&
                    reader_.peekByte() == '-'   &&
                    reader_.prefix(3)  == "---" &&
-                   searchAllWhitespace.canFind(reader_.peek(3));
+                   reader_.peek(3).isWhiteSpace;
         }
 
         /// Check if the next token is DOCUMENT-END:     ^ '...' (' '|'\n')
@@ -764,13 +766,13 @@ final class Scanner
             return reader_.column     == 0     &&
                    reader_.peekByte() == '.'   &&
                    reader_.prefix(3)  == "..." &&
-                   searchAllWhitespace.canFind(reader_.peek(3));
+                   reader_.peek(3).isWhiteSpace;
         }
 
         /// Check if the next token is BLOCK-ENTRY:      '-' (' '|'\n')
         bool checkBlockEntry() @safe
         {
-            return searchAllWhitespace.canFind(reader_.peek(1));
+            return !!reader_.peek(1).isWhiteSpace;
         }
 
         /// Check if the next token is KEY(flow context):    '?'
@@ -778,7 +780,7 @@ final class Scanner
         /// or KEY(block context):   '?' (' '|'\n')
         bool checkKey() @safe
         {
-            return (flowLevel_ > 0 || searchAllWhitespace.canFind(reader_.peek(1)));
+            return (flowLevel_ > 0 || reader_.peek(1).isWhiteSpace);
         }
 
         /// Check if the next token is VALUE(flow context):  ':'
@@ -786,7 +788,7 @@ final class Scanner
         /// or VALUE(block context): ':' (' '|'\n')
         bool checkValue() @safe
         {
-            return flowLevel_ > 0 || searchAllWhitespace.canFind(reader_.peek(1));
+            return flowLevel_ > 0 || reader_.peek(1).isWhiteSpace;
         }
 
         /// Check if the next token is a plain scalar.
@@ -806,13 +808,11 @@ final class Scanner
         bool checkPlain() @safe
         {
             const c = reader_.peek();
-            mixin FastCharSearch!"-?:,[]{}#&*!|>\'\"%@` \t\0\n\r\u0085\u2028\u2029"d
-                searchPlainNotFirstChar;
-            if(!searchPlainNotFirstChar.canFind(c))
+            if(!c.isNonScalarStartCharacter)
             {
                 return true;
             }
-            return !searchAllWhitespace.canFind(reader_.peek(1)) &&
+            return !reader_.peek(1).isWhiteSpace &&
                    (c == '-' || (flowLevel_ == 0 && (c == '?' || c == ':')));
         }
 
@@ -848,7 +848,7 @@ final class Scanner
         /// Scan and throw away all characters until next line break.
         void scanToNextBreak() @safe
         {
-            while(!searchAllBreaks.canFind(reader_.peek())) { reader_.forward(); }
+            while(!reader_.peek().isBreak) { reader_.forward(); }
         }
 
         /// Scan all characters until next line break.
@@ -858,7 +858,7 @@ final class Scanner
         void scanToNextBreakToSlice() @safe
         {
             uint length = 0;
-            while(!searchAllBreaks.canFind(reader_.peek(length)))
+            while(!reader_.peek(length).isBreak)
             {
                 ++length;
             }
@@ -1072,7 +1072,7 @@ final class Scanner
         {
             findNextNonSpace();
             if(reader_.peekByte() == '#') { scanToNextBreak(); }
-            if(searchAllBreaks.canFind(reader_.peek()))
+            if(reader_.peek().isBreak)
             {
                 scanLineBreak();
                 return;
@@ -1106,7 +1106,7 @@ final class Scanner
             char[] value = reader_.sliceBuilder.finish();
             if(error_)   { return Token.init; }
 
-            if(!searchAllWhitespace.canFind(reader_.peek()) &&
+            if(!reader_.peek().isWhiteSpace &&
                !"?:,]}%@"d.canFind(reader_.peekByte()))
             {
                 enum anchorCtx = "While scanning an anchor";
@@ -1141,7 +1141,6 @@ final class Scanner
             // (slice) we will produce.
             uint handleEnd;
 
-            mixin FastCharSearch!" \0\n\r\u0085\u2028\u2029"d search;
             if(c == '<')
             {
                 reader_.forward(2);
@@ -1157,7 +1156,7 @@ final class Scanner
                 }
                 reader_.forward();
             }
-            else if(searchAllWhitespace.canFind(c))
+            else if(c.isWhiteSpace)
             {
                 reader_.forward();
                 handleEnd = 0;
@@ -1168,7 +1167,7 @@ final class Scanner
                 uint length = 1;
                 bool useHandle = false;
 
-                while(!search.canFind(c))
+                while(!c.isBreakOrSpace)
                 {
                     if(c == '!')
                     {
@@ -1196,7 +1195,7 @@ final class Scanner
                 if(error_) { return Token.init; }
             }
 
-            if(search.canFind(reader_.peek()))
+            if(reader_.peek().isBreakOrSpace)
             {
                 char[] slice = reader_.sliceBuilder.finish();
                 return tagToken(startMark, reader_.mark, slice, handleEnd);
@@ -1326,7 +1325,7 @@ final class Scanner
             // (which are at the end of the scalar). Otherwise re remove them (end the
             // transaction).
             if(chomping == Chomping.Keep)  { breaksTransaction.commit(); }
-            else                           { breaksTransaction.__dtor(); }
+            else                           { breaksTransaction.end(); }
             if(chomping != Chomping.Strip && lineBreak != int.max)
             {
                 // If chomping is Keep, we keep the line break but the first line break
@@ -1435,7 +1434,7 @@ final class Scanner
             findNextNonSpace();
             if(reader_.peekByte()== '#') { scanToNextBreak(); }
 
-            if(searchAllBreaks.canFind(reader_.peek()))
+            if(reader_.peek().isBreak)
             {
                 scanLineBreak();
                 return;
@@ -1527,8 +1526,6 @@ final class Scanner
             {
                 dchar c = reader_.peek();
 
-                mixin FastCharSearch!" \t\0\n\r\u0085\u2028\u2029\'\"\\"d search;
-
                 size_t numCodePoints = 0;
                 // This is an optimized way of writing:
                 // while(!search.canFind(reader_.peek(numCodePoints))) { ++numCodePoints; }
@@ -1546,8 +1543,8 @@ final class Scanner
                     for(size_t i = oldSliceLength; i < slice.length;)
                     {
                         // slice is UTF-8 - need to decode
-                        const ch = slice[i] < 0x80 ? slice[i++] : decodeValidUTF8NoGC(slice, i);
-                        if(search.canFind(ch)) { break outer; }
+                        const ch = slice[i] < 0x80 ? slice[i++] : decode(slice, i);
+                        if(ch.isFlowScalarBreakSpace) { break outer; }
                         ++numCodePoints;
                     }
                     oldSliceLength = slice.length;
@@ -1596,14 +1593,15 @@ final class Scanner
                         char[2] escapeStart = ['\\', cast(char) c];
                         reader_.sliceBuilder.write(escapeStart);
                         reader_.sliceBuilder.write(hex);
-                        bool overflow;
                         // Note: This is just error checking; Parser does the actual
                         //       escaping (otherwise we could accidentally create an
                         //       escape sequence here that wasn't in input, breaking the
                         //       escaping code in parser, which is in parser because it
                         //       can't always be done in place)
-                        parseNoGC!int(hex, 16u, overflow);
-                        if(overflow)
+                        try {
+                            parse!int(hex, 16u);
+                        }
+                        catch (Exception)
                         {
                             error("While scanning a double quoted scalar", startMark,
                                   "overflow when parsing an escape sequence of " ~
@@ -1689,7 +1687,7 @@ final class Scanner
                 // Instead of checking indentation, we check for document separators.
                 const prefix = reader_.prefix(3);
                 if((prefix == "---" || prefix == "...") &&
-                   searchAllWhitespace.canFind(reader_.peek(3)))
+                   reader_.peek(3).isWhiteSpace)
                 {
                     error("While scanning a quoted scalar", startMark,
                           "found unexpected document separator", reader_.mark);
@@ -1741,8 +1739,8 @@ final class Scanner
                     for(;;)
                     {
                         const cNext = reader_.peek(length + 1);
-                        if(searchAllWhitespace.canFind(c) ||
-                           (c == ':' && searchAllWhitespace.canFind(cNext)))
+                        if(c.isWhiteSpace ||
+                           (c == ':' && cNext.isWhiteSpace))
                         {
                             break;
                         }
@@ -1755,7 +1753,7 @@ final class Scanner
                     for(;;)
                     {
                         c = reader_.peek(length);
-                        if(searchAllWhitespace.canFind(c) || ",:?[]{}"d.canFind(c))
+                        if(c.isWhiteSpace || ",:?[]{}"d.canFind(c))
                         {
                             break;
                         }
@@ -1765,7 +1763,7 @@ final class Scanner
 
                 // It's not clear what we should do with ':' in the flow context.
                 if(flowLevel_ > 0 && c == ':' &&
-                   !searchAllWhitespace.canFind(reader_.peek(length + 1)) &&
+                   !reader_.peek(length + 1).isWhiteSpace &&
                    !",[]{}"d.canFind(reader_.peek(length + 1)))
                 {
                     // This is an error; throw the slice away.
@@ -1799,7 +1797,7 @@ final class Scanner
                 }
             }
 
-            spacesTransaction.__dtor();
+            spacesTransaction.end();
             char[] slice = reader_.sliceBuilder.finish();
 
             return scalarToken(startMark, endMark, slice, ScalarStyle.Plain);
@@ -1821,10 +1819,7 @@ final class Scanner
             reader_.forward(length);
 
             dchar c = reader_.peek();
-            mixin FastCharSearch!" \n\r\u0085\u2028\u2029"d search;
-            // No newline after the spaces (if any)
-            // (Excluding ' ' so we can use the same FastCharSearch as below)
-            if(!search.canFind(c) && c != ' ')
+            if(!c.isNSChar)
             {
                 // We have spaces, but no newline.
                 if(whitespaces.length > 0) { reader_.sliceBuilder.write(whitespaces); }
@@ -1835,7 +1830,7 @@ final class Scanner
             const lineBreak = scanLineBreak();
             allowSimpleKey_ = true;
 
-            static bool end(Reader reader_) @safe pure nothrow @nogc
+            static bool end(Reader reader_) @safe pure
             {
                 const prefix = reader_.prefix(3);
                 return ("---" == prefix || "..." == prefix)
@@ -1849,7 +1844,7 @@ final class Scanner
             alias Transaction = SliceBuilder.Transaction;
             auto transaction = Transaction(&reader_.sliceBuilder);
             if(lineBreak != '\n') { reader_.sliceBuilder.write(lineBreak); }
-            while(search.canFind(reader_.peek()))
+            while(reader_.peek().isNSChar)
             {
                 if(reader_.peekByte() == ' ') { reader_.forward(); }
                 else
@@ -1917,8 +1912,7 @@ final class Scanner
             const startLen = reader_.sliceBuilder.length;
             {
                 uint length = 0;
-                mixin FastCharSearch!"-;/?:@&=+$,_.!~*\'()[]%"d search;
-                while(c.isAlphaNum || search.canFind(c))
+                while(c.isAlphaNum || c.isURIChar)
                 {
                     if(c == '%')
                     {
@@ -1978,9 +1972,7 @@ final class Scanner
                 }
                 else
                 {
-                    const decoded = decodeUTF8NoGC!(No.validated)(bytes[], nextChar);
-                    if(decoded.errorMessage !is null) { return size_t.max; }
-                    c = decoded.decoded;
+                    c = decode(bytes[], nextChar);
                 }
                 reader_.sliceBuilder.write(c);
                 if(bytes.length - nextChar > 0)
diff --git a/source/dyaml/serializer.d b/source/dyaml/serializer.d
index ae5ec58..c69772a 100644
--- a/source/dyaml/serializer.d
+++ b/source/dyaml/serializer.d
@@ -85,12 +85,6 @@ struct Serializer
         ~this() @safe
         {
             emitter_.emit(streamEndEvent(Mark(), Mark()));
-            YAMLVersion_.destroy();
-            YAMLVersion_ = null;
-            serializedNodes_.destroy();
-            serializedNodes_ = null;
-            anchors_.destroy();
-            anchors_ = null;
         }
 
         ///Serialize a node, emitting it in the process.
diff --git a/source/dyaml/unused.d b/source/dyaml/unused.d
deleted file mode 100644
index 73864f7..0000000
--- a/source/dyaml/unused.d
+++ /dev/null
@@ -1,161 +0,0 @@
-//          Copyright Ferdinand Majerech 2014.
-// Distributed under the Boost Software License, Version 1.0.
-//    (See accompanying file LICENSE_1_0.txt or copy at
-//          http://www.boost.org/LICENSE_1_0.txt)
-
-
-// Code that is currently unused but may be useful for future D:YAML releases
-module dyaml.unused;
-
-
-
-import std.utf;
-
-import tinyendian;
-
-// Decode an UTF-8/16/32 buffer to UTF-32 (for UTF-32 this does nothing).
-//
-// Params:
-//
-// input    = The UTF-8/16/32 buffer to decode.
-// encoding = Encoding of input.
-//
-// Returns:
-//
-// A struct with the following members:
-//
-// $(D string errorMessage) In case of a decoding error, the error message is stored
-//                          here. If there was no error, errorMessage is NULL. Always
-//                          check this first before using the other members.
-// $(D dchar[] decoded)     A GC-allocated buffer with decoded UTF-32 characters.
-auto decodeUTF(ubyte[] input, UTFEncoding encoding) @safe pure nothrow
-{
-    // Documented in function ddoc.
-    struct Result
-    {
-        string errorMessage;
-        dchar[] decoded;
-    }
-
-    Result result;
-
-    // Decode input_ if it's encoded as UTF-8 or UTF-16.
-    //
-    // Params:
-    //
-    // buffer = The input buffer to decode.
-    // result = A Result struct to put decoded result and any error messages to.
-    //
-    // On error, result.errorMessage will be set.
-    static void decode(C)(C[] input, ref Result result)
-    {
-        // End of part of input that contains complete characters that can be decoded.
-        const size_t end = endOfLastUTFSequence(input);
-        // If end is 0, there are no full chars.
-        // This can happen at the end of file if there is an incomplete UTF sequence.
-        if(end < input.length)
-        {
-            result.errorMessage = "Invalid UTF character at the end of input";
-            return;
-        }
-
-        const srclength = input.length;
-        try for(size_t srcpos = 0; srcpos < srclength;)
-        {
-            const c = input[srcpos];
-            if(c < 0x80)
-            {
-                result.decoded ~= c;
-                ++srcpos;
-            }
-            else
-            {
-                result.decoded ~= std.utf.decode(input, srcpos);
-            }
-        }
-        catch(UTFException e)
-        {
-            result.errorMessage = e.msg;
-            return;
-        }
-        catch(Exception e)
-        {
-            assert(false, "Unexpected exception in decode(): " ~ e.msg);
-        }
-    }
-
-    final switch(encoding)
-    {
-        case UTFEncoding.UTF_8:  decode(cast(char[])input, result); break;
-        case UTFEncoding.UTF_16:
-            assert(input.length % 2 == 0, "UTF-16 buffer size must be even");
-            decode(cast(wchar[])input, result);
-            break;
-        case UTFEncoding.UTF_32:
-            assert(input.length % 4 == 0,
-                    "UTF-32 buffer size must be a multiple of 4");
-            // No need to decode anything
-            result.decoded = cast(dchar[])input;
-            break;
-    }
-
-    if(result.errorMessage !is null) { return result; }
-
-    return result;
-}
-
-
-// Determine the end of last UTF-8 or UTF-16 sequence in a raw buffer.
-size_t endOfLastUTFSequence(C)(const C[] buffer)
-{
-    static if(is(C == char))
-    {
-        for(long end = buffer.length - 1; end >= 0; --end)
-        {
-            const stride = utf8Stride[buffer[cast(size_t)end]];
-            if(stride != 0xFF)
-            {
-                // If stride goes beyond end of the buffer, return end.
-                // Otherwise the last sequence ends at buffer.length, so we can
-                // return that. (Unless there is an invalid code unit, which is
-                // caught at decoding)
-                return (stride > buffer.length - end) ? cast(size_t)end : buffer.length;
-            }
-        }
-        return 0;
-    }
-    else static if(is(C == wchar))
-    {
-        // TODO this is O(N), which is slow. Find out if we can somehow go
-        // from the end backwards with UTF-16.
-        size_t end = 0;
-        while(end < buffer.length)
-        {
-            const s = stride(buffer, end);
-            if(s + end > buffer.length) { break; }
-            end += s;
-        }
-        return end;
-    }
-}
-
-// UTF-8 codepoint strides (0xFF are codepoints that can't start a sequence).
-immutable ubyte[256] utf8Stride =
-[
-    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
-    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
-    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
-    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
-    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
-    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
-    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
-    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
-    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
-    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
-    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
-    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
-    2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
-    2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
-    3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,
-    4,4,4,4,4,4,4,4,5,5,5,5,6,6,0xFF,0xFF,
-];