diff --git a/modules/juce_audio_basics/buffers/juce_AudioSampleBuffer.h b/modules/juce_audio_basics/buffers/juce_AudioSampleBuffer.h
index ac9addd564..d3cf8a9b2c 100644
--- a/modules/juce_audio_basics/buffers/juce_AudioSampleBuffer.h
+++ b/modules/juce_audio_basics/buffers/juce_AudioSampleBuffer.h
@@ -1092,7 +1092,7 @@ private:
         }
         else
         {
-            allocatedData.malloc ((size_t) numChannels + 1, sizeof (Type*));
+            allocatedData.malloc (numChannels + 1, sizeof (Type*));
             channels = reinterpret_cast<Type**> (allocatedData.get());
         }
 
diff --git a/modules/juce_audio_basics/buffers/juce_FloatVectorOperations.cpp b/modules/juce_audio_basics/buffers/juce_FloatVectorOperations.cpp
index 6c8816f623..0bd25d589a 100644
--- a/modules/juce_audio_basics/buffers/juce_FloatVectorOperations.cpp
+++ b/modules/juce_audio_basics/buffers/juce_FloatVectorOperations.cpp
@@ -1139,8 +1139,8 @@ public:
             const int range = random.nextBool() ? 500 : 10;
             const int num = random.nextInt (range) + 1;
 
-            HeapBlock<ValueType> buffer1 ((size_t) num + 16), buffer2 ((size_t) num + 16);
-            HeapBlock<int> buffer3 ((size_t) num + 16);
+            HeapBlock<ValueType> buffer1 (num + 16), buffer2 (num + 16);
+            HeapBlock<int> buffer3 (num + 16);
 
            #if JUCE_ARM
             ValueType* const data1 = buffer1;
diff --git a/modules/juce_audio_basics/effects/juce_Reverb.h b/modules/juce_audio_basics/effects/juce_Reverb.h
index 02b95b3c31..9fa37b1232 100644
--- a/modules/juce_audio_basics/effects/juce_Reverb.h
+++ b/modules/juce_audio_basics/effects/juce_Reverb.h
@@ -229,7 +229,7 @@ private:
             if (size != bufferSize)
             {
                 bufferIndex = 0;
-                buffer.malloc ((size_t) size);
+                buffer.malloc (size);
                 bufferSize = size;
             }
 
@@ -274,7 +274,7 @@ private:
             if (size != bufferSize)
             {
                 bufferIndex = 0;
-                buffer.malloc ((size_t) size);
+                buffer.malloc (size);
                 bufferSize = size;
             }
 
diff --git a/modules/juce_audio_basics/midi/juce_MidiMessage.cpp b/modules/juce_audio_basics/midi/juce_MidiMessage.cpp
index 761c578dc6..4ec9f61164 100644
--- a/modules/juce_audio_basics/midi/juce_MidiMessage.cpp
+++ b/modules/juce_audio_basics/midi/juce_MidiMessage.cpp
@@ -638,7 +638,7 @@ bool MidiMessage::isSysEx() const noexcept
 
 MidiMessage MidiMessage::createSysExMessage (const void* sysexData, const int dataSize)
 {
-    HeapBlock<uint8> m ((size_t) dataSize + 2);
+    HeapBlock<uint8> m (dataSize + 2);
 
     m[0] = 0xf0;
     memcpy (m + 1, sysexData, (size_t) dataSize);
diff --git a/modules/juce_audio_basics/sources/juce_ResamplingAudioSource.cpp b/modules/juce_audio_basics/sources/juce_ResamplingAudioSource.cpp
index 67ff49ccd4..c8c339ce4d 100644
--- a/modules/juce_audio_basics/sources/juce_ResamplingAudioSource.cpp
+++ b/modules/juce_audio_basics/sources/juce_ResamplingAudioSource.cpp
@@ -52,14 +52,14 @@ void ResamplingAudioSource::prepareToPlay (int samplesPerBlockExpected, double s
 {
     const SpinLock::ScopedLockType sl (ratioLock);
 
-    const int scaledBlockSize = roundToInt (samplesPerBlockExpected * ratio);
+    auto scaledBlockSize = roundToInt (samplesPerBlockExpected * ratio);
     input->prepareToPlay (scaledBlockSize, sampleRate * ratio);
 
     buffer.setSize (numChannels, scaledBlockSize + 32);
 
-    filterStates.calloc ((size_t) numChannels);
-    srcBuffers.calloc ((size_t) numChannels);
-    destBuffers.calloc ((size_t) numChannels);
+    filterStates.calloc (numChannels);
+    srcBuffers.calloc (numChannels);
+    destBuffers.calloc (numChannels);
     createLowPass (ratio);
 
     flushBuffers();
diff --git a/modules/juce_audio_devices/native/juce_linux_Midi.cpp b/modules/juce_audio_devices/native/juce_linux_Midi.cpp
index ef4dfade87..4e0ab2a033 100644
--- a/modules/juce_audio_devices/native/juce_linux_Midi.cpp
+++ b/modules/juce_audio_devices/native/juce_linux_Midi.cpp
@@ -316,8 +316,8 @@ private:
 
             if (snd_midi_event_new (maxEventSize, &midiParser) >= 0)
             {
-                const int numPfds = snd_seq_poll_descriptors_count (seqHandle, POLLIN);
-                HeapBlock<pollfd> pfd ((size_t) numPfds);
+                auto numPfds = snd_seq_poll_descriptors_count (seqHandle, POLLIN);
+                HeapBlock<pollfd> pfd (numPfds);
                 snd_seq_poll_descriptors (seqHandle, pfd, (unsigned int) numPfds, POLLIN);
 
                 HeapBlock<uint8> buffer (maxEventSize);
diff --git a/modules/juce_audio_devices/native/juce_mac_CoreAudio.cpp b/modules/juce_audio_devices/native/juce_mac_CoreAudio.cpp
index 0bd8f3fbcb..a3c3f069ce 100644
--- a/modules/juce_audio_devices/native/juce_mac_CoreAudio.cpp
+++ b/modules/juce_audio_devices/native/juce_mac_CoreAudio.cpp
@@ -190,11 +190,11 @@ public:
 
     void allocateTempBuffers()
     {
-        const int tempBufSize = bufferSize + 4;
-        audioBuffer.calloc ((size_t) ((numInputChans + numOutputChans) * tempBufSize));
+        auto tempBufSize = bufferSize + 4;
+        audioBuffer.calloc ((numInputChans + numOutputChans) * tempBufSize);
 
-        tempInputBuffers.calloc  ((size_t) numInputChans + 2);
-        tempOutputBuffers.calloc ((size_t) numOutputChans + 2);
+        tempInputBuffers.calloc  (numInputChans + 2);
+        tempOutputBuffers.calloc (numOutputChans + 2);
 
         int count = 0;
         for (int i = 0; i < numInputChans;  ++i)  tempInputBuffers[i]  = audioBuffer + count++ * tempBufSize;
diff --git a/modules/juce_audio_formats/codecs/juce_FlacAudioFormat.cpp b/modules/juce_audio_formats/codecs/juce_FlacAudioFormat.cpp
index 05c3c44eac..8f92d26c04 100644
--- a/modules/juce_audio_formats/codecs/juce_FlacAudioFormat.cpp
+++ b/modules/juce_audio_formats/codecs/juce_FlacAudioFormat.cpp
@@ -440,7 +440,7 @@ public:
 
         HeapBlock<int*> channels;
         HeapBlock<int> temp;
-        const int bitsToShift = 32 - (int) bitsPerSample;
+        auto bitsToShift = 32 - (int) bitsPerSample;
 
         if (bitsToShift > 0)
         {
@@ -484,9 +484,9 @@ public:
     void writeMetaData (const FlacNamespace::FLAC__StreamMetadata* metadata)
     {
         using namespace FlacNamespace;
-        const FLAC__StreamMetadata_StreamInfo& info = metadata->data.stream_info;
+        auto& info = metadata->data.stream_info;
 
-        unsigned char buffer [FLAC__STREAM_METADATA_STREAMINFO_LENGTH];
+        unsigned char buffer[FLAC__STREAM_METADATA_STREAMINFO_LENGTH];
         const unsigned int channelsMinus1 = info.channels - 1;
         const unsigned int bitsMinus1 = info.bits_per_sample - 1;
 
diff --git a/modules/juce_audio_formats/format/juce_AudioFormatReader.cpp b/modules/juce_audio_formats/format/juce_AudioFormatReader.cpp
index fe5404aa16..3d5e898294 100644
--- a/modules/juce_audio_formats/format/juce_AudioFormatReader.cpp
+++ b/modules/juce_audio_formats/format/juce_AudioFormatReader.cpp
@@ -168,7 +168,7 @@ void AudioFormatReader::read (AudioSampleBuffer* buffer,
         }
         else
         {
-            HeapBlock<int*> chans ((size_t) numTargetChannels + 1);
+            HeapBlock<int*> chans (numTargetChannels + 1);
             readChannels (*this, chans, buffer, startSample, numSamples, readerStartSample, numTargetChannels);
         }
 
diff --git a/modules/juce_audio_utils/gui/juce_AudioThumbnail.cpp b/modules/juce_audio_utils/gui/juce_AudioThumbnail.cpp
index 1e3ea0eea6..4f50058acd 100644
--- a/modules/juce_audio_utils/gui/juce_AudioThumbnail.cpp
+++ b/modules/juce_audio_utils/gui/juce_AudioThumbnail.cpp
@@ -89,14 +89,12 @@ class AudioThumbnail::LevelDataSource   : public TimeSliceClient
 {
 public:
     LevelDataSource (AudioThumbnail& thumb, AudioFormatReader* newReader, int64 hash)
-        : lengthInSamples (0), numSamplesFinished (0), sampleRate (0), numChannels (0),
-          hashCode (hash), owner (thumb), reader (newReader), lastReaderUseTime (0)
+        : hashCode (hash), owner (thumb), reader (newReader)
     {
     }
 
     LevelDataSource (AudioThumbnail& thumb, InputSource* src)
-        : lengthInSamples (0), numSamplesFinished (0), sampleRate (0), numChannels (0),
-          hashCode (src->hashCode()), owner (thumb), source (src), lastReaderUseTime (0)
+        : hashCode (src->hashCode()), owner (thumb), source (src)
     {
     }
 
@@ -179,7 +177,6 @@ public:
 
         {
             const ScopedLock sl (readerLock);
-
             createReader();
 
             if (reader != nullptr)
@@ -207,17 +204,17 @@ public:
         return (int) (originalSample / owner.samplesPerThumbSample);
     }
 
-    int64 lengthInSamples, numSamplesFinished;
-    double sampleRate;
-    unsigned int numChannels;
-    int64 hashCode;
+    int64 lengthInSamples = 0, numSamplesFinished = 0;
+    double sampleRate = 0;
+    unsigned int numChannels = 0;
+    int64 hashCode = 0;
 
 private:
     AudioThumbnail& owner;
     ScopedPointer<InputSource> source;
     ScopedPointer<AudioFormatReader> reader;
     CriticalSection readerLock;
-    uint32 lastReaderUseTime;
+    uint32 lastReaderUseTime = 0;
 
     void createReader()
     {
@@ -232,23 +229,23 @@ private:
 
         if (! isFullyLoaded())
         {
-            const int numToDo = (int) jmin (256 * (int64) owner.samplesPerThumbSample, lengthInSamples - numSamplesFinished);
+            auto numToDo = (int) jmin (256 * (int64) owner.samplesPerThumbSample, lengthInSamples - numSamplesFinished);
 
             if (numToDo > 0)
             {
-                int64 startSample = numSamplesFinished;
+                auto startSample = numSamplesFinished;
 
-                const int firstThumbIndex = sampleToThumbSample (startSample);
-                const int lastThumbIndex  = sampleToThumbSample (startSample + numToDo);
-                const int numThumbSamps = lastThumbIndex - firstThumbIndex;
+                auto firstThumbIndex = sampleToThumbSample (startSample);
+                auto lastThumbIndex  = sampleToThumbSample (startSample + numToDo);
+                auto numThumbSamps = lastThumbIndex - firstThumbIndex;
 
-                HeapBlock<MinMaxValue> levelData ((size_t) numThumbSamps * numChannels);
+                HeapBlock<MinMaxValue> levelData ((unsigned int) numThumbSamps * numChannels);
                 HeapBlock<MinMaxValue*> levels (numChannels);
 
                 for (int i = 0; i < (int) numChannels; ++i)
                     levels[i] = levelData + i * numThumbSamps;
 
-                HeapBlock<Range<float> > levelsRead (numChannels);
+                HeapBlock<Range<float>> levelsRead (numChannels);
 
                 for (int i = 0; i < numThumbSamps; ++i)
                 {
@@ -283,7 +280,7 @@ public:
         ensureSize (numThumbSamples);
     }
 
-    inline MinMaxValue* getData (const int thumbSampleIndex) noexcept
+    inline MinMaxValue* getData (int thumbSampleIndex) noexcept
     {
         jassert (thumbSampleIndex < data.size());
         return data.getRawDataPointer() + thumbSampleIndex;
@@ -305,7 +302,7 @@ public:
 
             while (startSample <= endSample)
             {
-                const MinMaxValue& v = data.getReference (startSample);
+                auto& v = data.getReference (startSample);
 
                 if (v.getMinValue() < mn)  mn = v.getMinValue();
                 if (v.getMaxValue() > mx)  mx = v.getMaxValue();
@@ -323,14 +320,14 @@ public:
         result.set (1, 0);
     }
 
-    void write (const MinMaxValue* const values, const int startIndex, const int numValues)
+    void write (const MinMaxValue* values, int startIndex, int numValues)
     {
         resetPeak();
 
         if (startIndex + numValues > data.size())
             ensureSize (startIndex + numValues);
 
-        MinMaxValue* const dest = getData (startIndex);
+        auto* dest = getData (startIndex);
 
         for (int i = 0; i < numValues; ++i)
             dest[i] = values[i];
@@ -345,9 +342,10 @@ public:
     {
         if (peakLevel < 0)
         {
-            for (int i = 0; i < data.size(); ++i)
+            for (auto& s : data)
             {
-                const int peak = data[i].getPeak();
+                auto peak = s.getPeak();
+
                 if (peak > peakLevel)
                     peakLevel = peak;
             }
@@ -360,9 +358,10 @@ private:
     Array<MinMaxValue> data;
     int peakLevel;
 
-    void ensureSize (const int thumbSamples)
+    void ensureSize (int thumbSamples)
     {
-        const int extraNeeded = thumbSamples - data.size();
+        auto extraNeeded = thumbSamples - data.size();
+
         if (extraNeeded > 0)
             data.insertMultiple (-1, MinMaxValue(), extraNeeded);
     }
@@ -372,12 +371,7 @@ private:
 class AudioThumbnail::CachedWindow
 {
 public:
-    CachedWindow()
-        : cachedStart (0), cachedTimePerPixel (0),
-          numChannelsCached (0), numSamplesCached (0),
-          cacheNeedsRefilling (true)
-    {
-    }
+    CachedWindow() {}
 
     void invalidate()
     {
@@ -394,28 +388,28 @@ public:
                          numChans, sampsPerThumbSample, levelData, chans)
              && isPositiveAndBelow (channelNum, numChannelsCached))
         {
-            const Rectangle<int> clip (g.getClipBounds().getIntersection (area.withWidth (jmin (numSamplesCached, area.getWidth()))));
+            auto clip = g.getClipBounds().getIntersection (area.withWidth (jmin (numSamplesCached, area.getWidth())));
 
             if (! clip.isEmpty())
             {
-                const float topY = (float) area.getY();
-                const float bottomY = (float) area.getBottom();
-                const float midY = (topY + bottomY) * 0.5f;
-                const float vscale = verticalZoomFactor * (bottomY - topY) / 256.0f;
+                auto topY = (float) area.getY();
+                auto bottomY = (float) area.getBottom();
+                auto midY = (topY + bottomY) * 0.5f;
+                auto vscale = verticalZoomFactor * (bottomY - topY) / 256.0f;
 
-                const MinMaxValue* cacheData = getData (channelNum, clip.getX() - area.getX());
+                auto* cacheData = getData (channelNum, clip.getX() - area.getX());
 
                 RectangleList<float> waveform;
                 waveform.ensureStorageAllocated (clip.getWidth());
 
-                float x = (float) clip.getX();
+                auto x = (float) clip.getX();
 
                 for (int w = clip.getWidth(); --w >= 0;)
                 {
                     if (cacheData->isNonZero())
                     {
-                        const float top    = jmax (midY - cacheData->getMaxValue() * vscale - 0.3f, topY);
-                        const float bottom = jmin (midY - cacheData->getMinValue() * vscale + 0.3f, bottomY);
+                        auto top    = jmax (midY - cacheData->getMaxValue() * vscale - 0.3f, topY);
+                        auto bottom = jmin (midY - cacheData->getMinValue() * vscale + 0.3f, bottomY);
 
                         waveform.addWithoutMerging (Rectangle<float> (x, top, 1.0f, bottom - top));
                     }
@@ -431,15 +425,15 @@ public:
 
 private:
     Array<MinMaxValue> data;
-    double cachedStart, cachedTimePerPixel;
-    int numChannelsCached, numSamplesCached;
-    bool cacheNeedsRefilling;
+    double cachedStart = 0, cachedTimePerPixel = 0;
+    int numChannelsCached = 0, numSamplesCached = 0;
+    bool cacheNeedsRefilling = true;
 
-    bool refillCache (const int numSamples, double startTime, const double endTime,
-                      const double rate, const int numChans, const int sampsPerThumbSample,
+    bool refillCache (int numSamples, double startTime, double endTime,
+                      double rate, int numChans, int sampsPerThumbSample,
                       LevelDataSource* levelData, const OwnedArray<ThumbData>& chans)
     {
-        const double timePerPixel = (endTime - startTime) / numSamples;
+        auto timePerPixel = (endTime - startTime) / numSamples;
 
         if (numSamples <= 0 || timePerPixel <= 0.0 || rate <= 0)
         {
@@ -466,13 +460,13 @@ private:
 
         if (timePerPixel * rate <= sampsPerThumbSample && levelData != nullptr)
         {
-            int sample = roundToInt (startTime * rate);
-            Array<Range<float> > levels;
+            auto sample = roundToInt (startTime * rate);
+            Array<Range<float>> levels;
 
             int i;
             for (i = 0; i < numSamples; ++i)
             {
-                const int nextSample = roundToInt ((startTime + timePerPixel) * rate);
+                auto nextSample = roundToInt ((startTime + timePerPixel) * rate);
 
                 if (sample >= 0)
                 {
@@ -485,7 +479,7 @@ private:
                     {
                         levelData->getLevels (sample, jmax (1, nextSample - sample), levels);
 
-                        const int totalChans = jmin (levels.size(), numChannelsCached);
+                        auto totalChans = jmin (levels.size(), numChannelsCached);
 
                         for (int chan = 0; chan < totalChans; ++chan)
                             getData (chan, i)->setFloat (levels.getReference (chan));
@@ -507,14 +501,14 @@ private:
                 ThumbData* channelData = chans.getUnchecked (channelNum);
                 MinMaxValue* cacheData = getData (channelNum, 0);
 
-                const double timeToThumbSampleFactor = rate / (double) sampsPerThumbSample;
+                auto timeToThumbSampleFactor = rate / (double) sampsPerThumbSample;
 
                 startTime = cachedStart;
-                int sample = roundToInt (startTime * timeToThumbSampleFactor);
+                auto sample = roundToInt (startTime * timeToThumbSampleFactor);
 
                 for (int i = numSamples; --i >= 0;)
                 {
-                    const int nextSample = roundToInt ((startTime + timePerPixel) * timeToThumbSampleFactor);
+                    auto nextSample = roundToInt ((startTime + timePerPixel) * timeToThumbSampleFactor);
 
                     channelData->getMinMax (sample, nextSample, *cacheData);
 
@@ -538,7 +532,7 @@ private:
 
     void ensureSize (const int numSamples)
     {
-        const int itemsRequired = numSamples * numChannelsCached;
+        auto itemsRequired = numSamples * numChannelsCached;
 
         if (data.size() < itemsRequired)
             data.insertMultiple (-1, MinMaxValue(), itemsRequired - data.size());
@@ -552,11 +546,7 @@ AudioThumbnail::AudioThumbnail (const int originalSamplesPerThumbnailSample,
     : formatManagerToUse (formatManager),
       cache (cacheToUse),
       window (new CachedWindow()),
-      samplesPerThumbSample (originalSamplesPerThumbnailSample),
-      totalSamples (0),
-      numSamplesFinished (0),
-      numChannels (0),
-      sampleRate (0)
+      samplesPerThumbSample (originalSamplesPerThumbnailSample)
 {
 }
 
@@ -710,26 +700,26 @@ void AudioThumbnail::addBlock (const int64 startSample, const AudioSampleBuffer&
               && startOffsetInBuffer >= 0
               && startOffsetInBuffer + numSamples <= incoming.getNumSamples());
 
-    const int firstThumbIndex = (int) (startSample / samplesPerThumbSample);
-    const int lastThumbIndex  = (int) ((startSample + numSamples + (samplesPerThumbSample - 1)) / samplesPerThumbSample);
-    const int numToDo = lastThumbIndex - firstThumbIndex;
+    auto firstThumbIndex = (int) (startSample / samplesPerThumbSample);
+    auto lastThumbIndex  = (int) ((startSample + numSamples + (samplesPerThumbSample - 1)) / samplesPerThumbSample);
+    auto numToDo = lastThumbIndex - firstThumbIndex;
 
     if (numToDo > 0)
     {
-        const int numChans = jmin (channels.size(), incoming.getNumChannels());
+        auto numChans = jmin (channels.size(), incoming.getNumChannels());
 
-        const HeapBlock<MinMaxValue> thumbData ((size_t) (numToDo * numChans));
-        const HeapBlock<MinMaxValue*> thumbChannels ((size_t) numChans);
+        const HeapBlock<MinMaxValue> thumbData (numToDo * numChans);
+        const HeapBlock<MinMaxValue*> thumbChannels (numChans);
 
         for (int chan = 0; chan < numChans; ++chan)
         {
-            const float* const sourceData = incoming.getReadPointer (chan, startOffsetInBuffer);
-            MinMaxValue* const dest = thumbData + numToDo * chan;
+            auto* sourceData = incoming.getReadPointer (chan, startOffsetInBuffer);
+            auto* dest = thumbData + numToDo * chan;
             thumbChannels [chan] = dest;
 
             for (int i = 0; i < numToDo; ++i)
             {
-                const int start = i * samplesPerThumbSample;
+                auto start = i * samplesPerThumbSample;
                 dest[i].setFloat (FloatVectorOperations::findMinAndMax (sourceData + start, jmin (samplesPerThumbSample, numSamples - start)));
             }
         }
@@ -745,8 +735,8 @@ void AudioThumbnail::setLevels (const MinMaxValue* const* values, int thumbIndex
     for (int i = jmin (numChans, channels.size()); --i >= 0;)
         channels.getUnchecked(i)->write (values[i], thumbIndex, numValues);
 
-    const int64 start = thumbIndex * (int64) samplesPerThumbSample;
-    const int64 end = (thumbIndex + numValues) * (int64) samplesPerThumbSample;
+    auto start = thumbIndex * (int64) samplesPerThumbSample;
+    auto end   = (thumbIndex + numValues) * (int64) samplesPerThumbSample;
 
     if (numSamplesFinished >= start && end > numSamplesFinished)
         numSamplesFinished = end;
@@ -787,23 +777,23 @@ float AudioThumbnail::getApproximatePeak() const
     const ScopedLock sl (lock);
     int peak = 0;
 
-    for (int i = channels.size(); --i >= 0;)
-        peak = jmax (peak, channels.getUnchecked(i)->getPeak());
+    for (auto* c : channels)
+        peak = jmax (peak, c->getPeak());
 
     return jlimit (0, 127, peak) / 127.0f;
 }
 
-void AudioThumbnail::getApproximateMinMax (const double startTime, const double endTime, const int channelIndex,
+void AudioThumbnail::getApproximateMinMax (double startTime, double endTime, int channelIndex,
                                            float& minValue, float& maxValue) const noexcept
 {
     const ScopedLock sl (lock);
     MinMaxValue result;
-    const ThumbData* const data = channels [channelIndex];
+    auto* data = channels [channelIndex];
 
     if (data != nullptr && sampleRate > 0)
     {
-        const int firstThumbIndex = (int) ((startTime * sampleRate) / samplesPerThumbSample);
-        const int lastThumbIndex  = (int) (((endTime * sampleRate) + samplesPerThumbSample - 1) / samplesPerThumbSample);
+        auto firstThumbIndex = (int) ((startTime * sampleRate) / samplesPerThumbSample);
+        auto lastThumbIndex  = (int) (((endTime * sampleRate) + samplesPerThumbSample - 1) / samplesPerThumbSample);
 
         data->getMinMax (jmax (0, firstThumbIndex), lastThumbIndex, result);
     }
@@ -826,10 +816,10 @@ void AudioThumbnail::drawChannels (Graphics& g, const Rectangle<int>& area, doub
 {
     for (int i = 0; i < numChannels; ++i)
     {
-        const int y1 = roundToInt ((i * area.getHeight()) / numChannels);
-        const int y2 = roundToInt (((i + 1) * area.getHeight()) / numChannels);
+        auto y1 = roundToInt ((i * area.getHeight()) / numChannels);
+        auto y2 = roundToInt (((i + 1) * area.getHeight()) / numChannels);
 
-        drawChannel (g, Rectangle<int> (area.getX(), area.getY() + y1, area.getWidth(), y2 - y1),
+        drawChannel (g, { area.getX(), area.getY() + y1, area.getWidth(), y2 - y1 },
                      startTimeSeconds, endTimeSeconds, i, verticalZoomFactor);
     }
 }
diff --git a/modules/juce_audio_utils/gui/juce_AudioThumbnail.h b/modules/juce_audio_utils/gui/juce_AudioThumbnail.h
index ecfc42a40e..3121ab2c63 100644
--- a/modules/juce_audio_utils/gui/juce_AudioThumbnail.h
+++ b/modules/juce_audio_utils/gui/juce_AudioThumbnail.h
@@ -210,10 +210,10 @@ private:
     ScopedPointer<CachedWindow> window;
     OwnedArray<ThumbData> channels;
 
-    int32 samplesPerThumbSample;
-    int64 totalSamples, numSamplesFinished;
-    int32 numChannels;
-    double sampleRate;
+    int32 samplesPerThumbSample = 0;
+    int64 totalSamples = 0, numSamplesFinished = 0;
+    int32 numChannels = 0;
+    double sampleRate = 0;
     CriticalSection lock;
 
     void clearChannelData();
diff --git a/modules/juce_audio_utils/players/juce_AudioProcessorPlayer.cpp b/modules/juce_audio_utils/players/juce_AudioProcessorPlayer.cpp
index 9bfe2ca23c..66112eb604 100644
--- a/modules/juce_audio_utils/players/juce_AudioProcessorPlayer.cpp
+++ b/modules/juce_audio_utils/players/juce_AudioProcessorPlayer.cpp
@@ -187,7 +187,7 @@ void AudioProcessorPlayer::audioDeviceAboutToStart (AudioIODevice* const device)
     numOutputChans = numChansOut;
 
     messageCollector.reset (sampleRate);
-    channels.calloc ((size_t) jmax (numChansIn, numChansOut) + 2);
+    channels.calloc (jmax (numChansIn, numChansOut) + 2);
 
     if (processor != nullptr)
     {
diff --git a/modules/juce_core/maths/juce_Expression.cpp b/modules/juce_core/maths/juce_Expression.cpp
index afab1ae9d6..3c90388edf 100644
--- a/modules/juce_core/maths/juce_Expression.cpp
+++ b/modules/juce_core/maths/juce_Expression.cpp
@@ -245,10 +245,12 @@ struct Expression::Helpers
         {
             checkRecursionDepth (recursionDepth);
             double result = 0;
-            const int numParams = parameters.size();
+            auto numParams = parameters.size();
+
             if (numParams > 0)
             {
-                HeapBlock<double> params ((size_t) numParams);
+                HeapBlock<double> params (numParams);
+
                 for (int i = 0; i < numParams; ++i)
                     params[i] = parameters.getReference(i).term->resolve (scope, recursionDepth + 1)->toDouble();
 
diff --git a/modules/juce_core/memory/juce_HeapBlock.h b/modules/juce_core/memory/juce_HeapBlock.h
index a469d58905..241cf759d0 100644
--- a/modules/juce_core/memory/juce_HeapBlock.h
+++ b/modules/juce_core/memory/juce_HeapBlock.h
@@ -90,7 +90,7 @@ public:
         After creation, you can resize the array using the malloc(), calloc(),
         or realloc() methods.
     */
-    HeapBlock() noexcept  : data (nullptr)
+    HeapBlock() noexcept
     {
     }
 
@@ -102,8 +102,9 @@ public:
         If you want an array of zero values, you can use the calloc() method or the
         other constructor that takes an InitialisationState parameter.
     */
-    explicit HeapBlock (const size_t numElements)
-        : data (static_cast<ElementType*> (std::malloc (numElements * sizeof (ElementType))))
+    template <typename SizeType>
+    explicit HeapBlock (SizeType numElements)
+        : data (static_cast<ElementType*> (std::malloc (static_cast<size_t> (numElements) * sizeof (ElementType))))
     {
         throwOnAllocationFailure();
     }
@@ -113,10 +114,11 @@ public:
         The initialiseToZero parameter determines whether the new memory should be cleared,
         or left uninitialised.
     */
-    HeapBlock (const size_t numElements, const bool initialiseToZero)
+    template <typename SizeType>
+    HeapBlock (SizeType numElements, bool initialiseToZero)
         : data (static_cast<ElementType*> (initialiseToZero
-                                               ? std::calloc (numElements, sizeof (ElementType))
-                                               : std::malloc (numElements * sizeof (ElementType))))
+                                               ? std::calloc (static_cast<size_t> (numElements), sizeof (ElementType))
+                                               : std::malloc (static_cast<size_t> (numElements) * sizeof (ElementType))))
     {
         throwOnAllocationFailure();
     }
@@ -148,62 +150,61 @@ public:
         This may be a null pointer if the data hasn't yet been allocated, or if it has been
         freed by calling the free() method.
     */
-    inline operator ElementType*() const noexcept                           { return data; }
-
+    inline operator ElementType*() const noexcept                            { return data; }
 
     /** Returns a raw pointer to the allocated data.
         This may be a null pointer if the data hasn't yet been allocated, or if it has been
         freed by calling the free() method.
     */
-    inline ElementType* get() const noexcept                                { return data; }
+    inline ElementType* get() const noexcept                                 { return data; }
 
     /** Returns a raw pointer to the allocated data.
         This may be a null pointer if the data hasn't yet been allocated, or if it has been
         freed by calling the free() method.
     */
-    inline ElementType* getData() const noexcept                            { return data; }
+    inline ElementType* getData() const noexcept                             { return data; }
 
     /** Returns a void pointer to the allocated data.
         This may be a null pointer if the data hasn't yet been allocated, or if it has been
         freed by calling the free() method.
     */
-    inline operator void*() const noexcept                                  { return static_cast<void*> (data); }
+    inline operator void*() const noexcept                                   { return static_cast<void*> (data); }
 
     /** Returns a void pointer to the allocated data.
         This may be a null pointer if the data hasn't yet been allocated, or if it has been
         freed by calling the free() method.
     */
-    inline operator const void*() const noexcept                            { return static_cast<const void*> (data); }
+    inline operator const void*() const noexcept                             { return static_cast<const void*> (data); }
 
     /** Lets you use indirect calls to the first element in the array.
         Obviously this will cause problems if the array hasn't been initialised, because it'll
         be referencing a null pointer.
     */
-    inline ElementType* operator->() const  noexcept                        { return data; }
+    inline ElementType* operator->() const  noexcept                         { return data; }
 
     /** Returns a reference to one of the data elements.
         Obviously there's no bounds-checking here, as this object is just a dumb pointer and
         has no idea of the size it currently has allocated.
     */
     template <typename IndexType>
-    inline ElementType& operator[] (IndexType index) const noexcept         { return data [index]; }
+    ElementType& operator[] (IndexType index) const noexcept                 { return data [index]; }
 
     /** Returns a pointer to a data element at an offset from the start of the array.
         This is the same as doing pointer arithmetic on the raw pointer itself.
     */
     template <typename IndexType>
-    inline ElementType* operator+ (IndexType index) const noexcept          { return data + index; }
+    ElementType* operator+ (IndexType index) const noexcept                  { return data + index; }
 
     //==============================================================================
     /** Compares the pointer with another pointer.
         This can be handy for checking whether this is a null pointer.
     */
-    inline bool operator== (const ElementType* const otherPointer) const noexcept   { return otherPointer == data; }
+    inline bool operator== (const ElementType* otherPointer) const noexcept  { return otherPointer == data; }
 
     /** Compares the pointer with another pointer.
         This can be handy for checking whether this is a null pointer.
     */
-    inline bool operator!= (const ElementType* const otherPointer) const noexcept   { return otherPointer != data; }
+    inline bool operator!= (const ElementType* otherPointer) const noexcept  { return otherPointer != data; }
 
     //==============================================================================
     /** Allocates a specified amount of memory.
@@ -218,20 +219,22 @@ public:
         The data that is allocated will be freed when this object is deleted, or when you
         call free() or any of the allocation methods.
     */
-    void malloc (const size_t newNumElements, const size_t elementSize = sizeof (ElementType))
+    template <typename SizeType>
+    void malloc (SizeType newNumElements, size_t elementSize = sizeof (ElementType))
     {
         std::free (data);
-        data = static_cast<ElementType*> (std::malloc (newNumElements * elementSize));
+        data = static_cast<ElementType*> (std::malloc (static_cast<size_t> (newNumElements) * elementSize));
         throwOnAllocationFailure();
     }
 
     /** Allocates a specified amount of memory and clears it.
         This does the same job as the malloc() method, but clears the memory that it allocates.
     */
-    void calloc (const size_t newNumElements, const size_t elementSize = sizeof (ElementType))
+    template <typename SizeType>
+    void calloc (SizeType newNumElements, const size_t elementSize = sizeof (ElementType))
     {
         std::free (data);
-        data = static_cast<ElementType*> (std::calloc (newNumElements, elementSize));
+        data = static_cast<ElementType*> (std::calloc (static_cast<size_t> (newNumElements), elementSize));
         throwOnAllocationFailure();
     }
 
@@ -239,12 +242,13 @@ public:
         This does the same job as either malloc() or calloc(), depending on the
         initialiseToZero parameter.
     */
-    void allocate (const size_t newNumElements, bool initialiseToZero)
+    template <typename SizeType>
+    void allocate (SizeType newNumElements, bool initialiseToZero)
     {
         std::free (data);
         data = static_cast<ElementType*> (initialiseToZero
-                                             ? std::calloc (newNumElements, sizeof (ElementType))
-                                             : std::malloc (newNumElements * sizeof (ElementType)));
+                                             ? std::calloc (static_cast<size_t> (newNumElements), sizeof (ElementType))
+                                             : std::malloc (static_cast<size_t> (newNumElements) * sizeof (ElementType)));
         throwOnAllocationFailure();
     }
 
@@ -253,10 +257,11 @@ public:
         The semantics of this method are the same as malloc() and calloc(), but it
         uses realloc() to keep as much of the existing data as possible.
     */
-    void realloc (const size_t newNumElements, const size_t elementSize = sizeof (ElementType))
+    template <typename SizeType>
+    void realloc (SizeType newNumElements, size_t elementSize = sizeof (ElementType))
     {
-        data = static_cast<ElementType*> (data == nullptr ? std::malloc (newNumElements * elementSize)
-                                                          : std::realloc (data, newNumElements * elementSize));
+        data = static_cast<ElementType*> (data == nullptr ? std::malloc (static_cast<size_t> (newNumElements) * elementSize)
+                                                          : std::realloc (data, static_cast<size_t> (newNumElements) * elementSize));
         throwOnAllocationFailure();
     }
 
@@ -282,9 +287,10 @@ public:
         Since the block has no way of knowing its own size, you must make sure that the number of
         elements you specify doesn't exceed the allocated size.
     */
-    void clear (size_t numElements) noexcept
+    template <typename SizeType>
+    void clear (SizeType numElements) noexcept
     {
-        zeromem (data, sizeof (ElementType) * numElements);
+        zeromem (data, sizeof (ElementType) * static_cast<size_t> (numElements));
     }
 
     /** This typedef can be used to get the type of the heapblock's elements. */
@@ -292,7 +298,7 @@ public:
 
 private:
     //==============================================================================
-    ElementType* data;
+    ElementType* data = nullptr;
 
     void throwOnAllocationFailure() const
     {
diff --git a/modules/juce_core/native/juce_android_Network.cpp b/modules/juce_core/native/juce_android_Network.cpp
index 136ce47de3..5b5864ebb1 100644
--- a/modules/juce_core/native/juce_android_Network.cpp
+++ b/modules/juce_core/native/juce_android_Network.cpp
@@ -260,7 +260,7 @@ static void findIPAddresses (int sock, Array<IPAddress>& result)
     do
     {
         bufferSize *= 2;
-        buffer.calloc ((size_t) bufferSize);
+        buffer.calloc (bufferSize);
 
         cfg.ifc_len = bufferSize;
         cfg.ifc_buf = buffer;
diff --git a/modules/juce_core/native/juce_linux_Network.cpp b/modules/juce_core/native/juce_linux_Network.cpp
index 2ca8d51200..e02a369690 100644
--- a/modules/juce_core/native/juce_linux_Network.cpp
+++ b/modules/juce_core/native/juce_linux_Network.cpp
@@ -239,8 +239,8 @@ public:
                 return false;
 
             int64 numBytesToSkip = wantedPos - position;
-            const int skipBufferSize = (int) jmin (numBytesToSkip, (int64) 16384);
-            HeapBlock<char> temp ((size_t) skipBufferSize);
+            auto skipBufferSize = (int) jmin (numBytesToSkip, (int64) 16384);
+            HeapBlock<char> temp (skipBufferSize);
 
             while (numBytesToSkip > 0 && ! isExhausted())
                 numBytesToSkip -= read (temp, (int) jmin (numBytesToSkip, (int64) skipBufferSize));
diff --git a/modules/juce_core/native/juce_mac_Network.mm b/modules/juce_core/native/juce_mac_Network.mm
index f182a42b52..1e3ec34e07 100644
--- a/modules/juce_core/native/juce_mac_Network.mm
+++ b/modules/juce_core/native/juce_mac_Network.mm
@@ -1055,9 +1055,9 @@ public:
             if (wantedPos < position)
                 return false;
 
-            int64 numBytesToSkip = wantedPos - position;
-            const int skipBufferSize = (int) jmin (numBytesToSkip, (int64) 16384);
-            HeapBlock<char> temp ((size_t) skipBufferSize);
+            auto numBytesToSkip = wantedPos - position;
+            auto skipBufferSize = (int) jmin (numBytesToSkip, (int64) 16384);
+            HeapBlock<char> temp (skipBufferSize);
 
             while (numBytesToSkip > 0 && ! isExhausted())
                 numBytesToSkip -= read (temp, (int) jmin (numBytesToSkip, (int64) skipBufferSize));
diff --git a/modules/juce_core/native/juce_mac_Strings.mm b/modules/juce_core/native/juce_mac_Strings.mm
index b8a479ead8..61f30118cd 100644
--- a/modules/juce_core/native/juce_mac_Strings.mm
+++ b/modules/juce_core/native/juce_mac_Strings.mm
@@ -32,7 +32,7 @@ String String::fromCFString (CFStringRef cfString)
     CFIndex bytesNeeded = 0;
     CFStringGetBytes (cfString, range, kCFStringEncodingUTF8, 0, false, nullptr, 0, &bytesNeeded);
 
-    HeapBlock<UInt8> utf8 ((size_t) bytesNeeded + 1);
+    HeapBlock<UInt8> utf8 (bytesNeeded + 1);
     CFStringGetBytes (cfString, range, kCFStringEncodingUTF8, 0, false, utf8, bytesNeeded + 1, nullptr);
 
     return String (CharPointer_UTF8 ((const CharPointer_UTF8::CharType*) utf8.get()),
diff --git a/modules/juce_core/native/juce_win32_Network.cpp b/modules/juce_core/native/juce_win32_Network.cpp
index bdc7dc9c4d..8c4716b298 100644
--- a/modules/juce_core/native/juce_win32_Network.cpp
+++ b/modules/juce_core/native/juce_win32_Network.cpp
@@ -88,7 +88,7 @@ public:
 
                 for (;;)
                 {
-                    HeapBlock<char> buffer ((size_t) bufferSizeBytes);
+                    HeapBlock<char> buffer (bufferSizeBytes);
 
                     if (HttpQueryInfo (request, HTTP_QUERY_RAW_HEADERS_CRLF, buffer.getData(), &bufferSizeBytes, 0))
                     {
@@ -216,8 +216,8 @@ public:
                 return false;
 
             int64 numBytesToSkip = wantedPos - position;
-            const int skipBufferSize = (int) jmin (numBytesToSkip, (int64) 16384);
-            HeapBlock<char> temp ((size_t) skipBufferSize);
+            auto skipBufferSize = (int) jmin (numBytesToSkip, (int64) 16384);
+            HeapBlock<char> temp (skipBufferSize);
 
             while (numBytesToSkip > 0 && ! isExhausted())
                 numBytesToSkip -= read (temp, (int) jmin (numBytesToSkip, (int64) skipBufferSize));
@@ -645,7 +645,7 @@ bool JUCE_CALLTYPE Process::openEmailWithAttachments (const String& targetEmailA
     message.lpRecips = &recip;
 
     HeapBlock<MapiFileDesc> files;
-    files.calloc ((size_t) filesToAttach.size());
+    files.calloc (filesToAttach.size());
 
     message.nFileCount = (ULONG) filesToAttach.size();
     message.lpFiles = files;
diff --git a/modules/juce_core/streams/juce_BufferedInputStream.cpp b/modules/juce_core/streams/juce_BufferedInputStream.cpp
index 8af122a694..d53484fe22 100644
--- a/modules/juce_core/streams/juce_BufferedInputStream.cpp
+++ b/modules/juce_core/streams/juce_BufferedInputStream.cpp
@@ -44,7 +44,7 @@ BufferedInputStream::BufferedInputStream (InputStream* sourceStream, int size, b
      position (sourceStream->getPosition()),
      bufferStart (position)
 {
-    buffer.malloc ((size_t) bufferSize);
+    buffer.malloc (bufferSize);
 }
 
 BufferedInputStream::BufferedInputStream (InputStream& sourceStream, int size)
diff --git a/modules/juce_core/streams/juce_InputStream.cpp b/modules/juce_core/streams/juce_InputStream.cpp
index a27f5cfc1d..a01a12ff72 100644
--- a/modules/juce_core/streams/juce_InputStream.cpp
+++ b/modules/juce_core/streams/juce_InputStream.cpp
@@ -177,7 +177,7 @@ String InputStream::readString()
 String InputStream::readNextLine()
 {
     MemoryBlock buffer (256);
-    char* data = static_cast<char*> (buffer.getData());
+    auto* data = static_cast<char*> (buffer.getData());
     size_t i = 0;
 
     while ((data[i] = readByte()) != 0)
@@ -223,8 +223,8 @@ void InputStream::skipNextBytes (int64 numBytesToSkip)
 {
     if (numBytesToSkip > 0)
     {
-        const int skipBufferSize = (int) jmin (numBytesToSkip, (int64) 16384);
-        HeapBlock<char> temp ((size_t) skipBufferSize);
+        auto skipBufferSize = (int) jmin (numBytesToSkip, (int64) 16384);
+        HeapBlock<char> temp (skipBufferSize);
 
         while (numBytesToSkip > 0 && ! isExhausted())
             numBytesToSkip -= read (temp, (int) jmin (numBytesToSkip, (int64) skipBufferSize));
diff --git a/modules/juce_core/xml/juce_XmlElement.h b/modules/juce_core/xml/juce_XmlElement.h
index 33f86744ec..fd1362fb31 100644
--- a/modules/juce_core/xml/juce_XmlElement.h
+++ b/modules/juce_core/xml/juce_XmlElement.h
@@ -632,11 +632,11 @@ public:
     void sortChildElements (ElementComparator& comparator,
                             bool retainOrderOfEquivalentItems = false)
     {
-        const int num = getNumChildElements();
+        auto num = getNumChildElements();
 
         if (num > 1)
         {
-            HeapBlock<XmlElement*> elems ((size_t) num);
+            HeapBlock<XmlElement*> elems (num);
             getChildElementsAsArray (elems);
             sortArray (comparator, (XmlElement**) elems, 0, num - 1, retainOrderOfEquivalentItems);
             reorderChildElements (elems, num);
diff --git a/modules/juce_graphics/colour/juce_ColourGradient.cpp b/modules/juce_graphics/colour/juce_ColourGradient.cpp
index c025468e8d..6ed948c14b 100644
--- a/modules/juce_graphics/colour/juce_ColourGradient.cpp
+++ b/modules/juce_graphics/colour/juce_ColourGradient.cpp
@@ -37,20 +37,15 @@ ColourGradient::ColourGradient() noexcept
    #endif
 }
 
-ColourGradient::ColourGradient (Colour colour1, const float x1, const float y1,
-                                Colour colour2, const float x2, const float y2,
-                                const bool radial)
-    : point1 (x1, y1),
-      point2 (x2, y2),
-      isRadial (radial)
+ColourGradient::ColourGradient (Colour colour1, float x1, float y1,
+                                Colour colour2, float x2, float y2, bool radial)
+    : ColourGradient (colour1, Point<float> (x1, y1),
+                      colour2, Point<float> (x2, y2), radial)
 {
-    colours.add (ColourPoint (0.0, colour1));
-    colours.add (ColourPoint (1.0, colour2));
 }
 
 ColourGradient::ColourGradient (Colour colour1, Point<float> p1,
-                                Colour colour2, Point<float> p2,
-                                const bool radial)
+                                Colour colour2, Point<float> p2, bool radial)
     : point1 (p1),
       point2 (p2),
       isRadial (radial)
@@ -92,7 +87,7 @@ int ColourGradient::addColour (const double proportionAlongGradient, Colour colo
         return 0;
     }
 
-    const double pos = jmin (1.0, proportionAlongGradient);
+    auto pos = jmin (1.0, proportionAlongGradient);
 
     int i;
     for (i = 0; i < colours.size(); ++i)
@@ -111,11 +106,8 @@ void ColourGradient::removeColour (int index)
 
 void ColourGradient::multiplyOpacity (const float multiplier) noexcept
 {
-    for (int i = 0; i < colours.size(); ++i)
-    {
-        Colour& c = colours.getReference(i).colour;
-        c = c.withMultipliedAlpha (multiplier);
-    }
+    for (auto& c : colours)
+        c.colour = c.colour.withMultipliedAlpha (multiplier);
 }
 
 //==============================================================================
@@ -137,7 +129,7 @@ Colour ColourGradient::getColour (const int index) const noexcept
     if (isPositiveAndBelow (index, colours.size()))
         return colours.getReference (index).colour;
 
-    return Colour();
+    return {};
 }
 
 void ColourGradient::setColour (int index, Colour newColour) noexcept
@@ -175,14 +167,14 @@ void ColourGradient::createLookupTable (PixelARGB* const lookupTable, const int
     jassert (numEntries > 0);
     jassert (colours.getReference(0).position == 0.0); // The first colour specified has to go at position 0
 
-    PixelARGB pix1 (colours.getReference (0).colour.getPixelARGB());
+    auto pix1 = colours.getReference (0).colour.getPixelARGB();
     int index = 0;
 
     for (int j = 1; j < colours.size(); ++j)
     {
-        const ColourPoint& p = colours.getReference (j);
-        const int numToDo = roundToInt (p.position * (numEntries - 1)) - index;
-        const PixelARGB pix2 (p.colour.getPixelARGB());
+        auto& p = colours.getReference (j);
+        auto numToDo = roundToInt (p.position * (numEntries - 1)) - index;
+        auto pix2 = p.colour.getPixelARGB();
 
         for (int i = 0; i < numToDo; ++i)
         {
@@ -205,18 +197,18 @@ int ColourGradient::createLookupTable (const AffineTransform& transform, HeapBlo
     JUCE_COLOURGRADIENT_CHECK_COORDS_INITIALISED // Trying to use this object without setting its coordinates?
     jassert (colours.size() >= 2);
 
-    const int numEntries = jlimit (1, jmax (1, (colours.size() - 1) << 8),
-                                   3 * (int) point1.transformedBy (transform)
-                                                .getDistanceFrom (point2.transformedBy (transform)));
-    lookupTable.malloc ((size_t) numEntries);
+    auto numEntries = jlimit (1, jmax (1, (colours.size() - 1) << 8),
+                              3 * (int) point1.transformedBy (transform)
+                                              .getDistanceFrom (point2.transformedBy (transform)));
+    lookupTable.malloc (numEntries);
     createLookupTable (lookupTable, numEntries);
     return numEntries;
 }
 
 bool ColourGradient::isOpaque() const noexcept
 {
-    for (int i = 0; i < colours.size(); ++i)
-        if (! colours.getReference(i).colour.isOpaque())
+    for (auto& c : colours)
+        if (! c.colour.isOpaque())
             return false;
 
     return true;
@@ -224,8 +216,8 @@ bool ColourGradient::isOpaque() const noexcept
 
 bool ColourGradient::isInvisible() const noexcept
 {
-    for (int i = 0; i < colours.size(); ++i)
-        if (! colours.getReference(i).colour.isTransparent())
+    for (auto& c : colours)
+        if (! c.colour.isTransparent())
             return false;
 
     return true;
diff --git a/modules/juce_graphics/image_formats/juce_PNGLoader.cpp b/modules/juce_graphics/image_formats/juce_PNGLoader.cpp
index ee06273171..5a2a376ede 100644
--- a/modules/juce_graphics/image_formats/juce_PNGLoader.cpp
+++ b/modules/juce_graphics/image_formats/juce_PNGLoader.cpp
@@ -545,7 +545,7 @@ bool PNGImageFormat::writeImageToStream (const Image& image, OutputStream& out)
                   PNG_COMPRESSION_TYPE_BASE,
                   PNG_FILTER_TYPE_BASE);
 
-    HeapBlock<uint8> rowData ((size_t) width * 4);
+    HeapBlock<uint8> rowData (width * 4);
 
     png_color_8 sig_bit;
     sig_bit.red   = 8;
diff --git a/modules/juce_graphics/native/juce_mac_CoreGraphicsContext.mm b/modules/juce_graphics/native/juce_mac_CoreGraphicsContext.mm
index 63e7f89259..4de9851f61 100644
--- a/modules/juce_graphics/native/juce_mac_CoreGraphicsContext.mm
+++ b/modules/juce_graphics/native/juce_mac_CoreGraphicsContext.mm
@@ -247,7 +247,7 @@ bool CoreGraphicsContext::clipToRectangleListWithoutTest (const RectangleList<in
         return false;
     }
 
-    const size_t numRects = (size_t) clipRegion.getNumRectangles();
+    auto numRects = (size_t) clipRegion.getNumRectangles();
     HeapBlock<CGRect> rects (numRects);
 
     int i = 0;
@@ -558,7 +558,7 @@ void CoreGraphicsContext::drawLine (const Line<float>& line)
 
 void CoreGraphicsContext::fillRectList (const RectangleList<float>& list)
 {
-    HeapBlock<CGRect> rects ((size_t) list.getNumRectangles());
+    HeapBlock<CGRect> rects (list.getNumRectangles());
 
     size_t num = 0;
 
diff --git a/modules/juce_graphics/native/juce_mac_Fonts.mm b/modules/juce_graphics/native/juce_mac_Fonts.mm
index 19b3b38f3f..21e595afea 100644
--- a/modules/juce_graphics/native/juce_mac_Fonts.mm
+++ b/modules/juce_graphics/native/juce_mac_Fonts.mm
@@ -149,7 +149,7 @@ namespace CoreTextTypeLayout
         {
             if (advances == nullptr)
             {
-                local.malloc ((size_t) numGlyphs);
+                local.malloc (numGlyphs);
                 CTRunGetAdvances (run, CFRangeMake (0, 0), local);
                 advances = local;
             }
diff --git a/modules/juce_gui_basics/layout/juce_FlexBox.cpp b/modules/juce_gui_basics/layout/juce_FlexBox.cpp
index d647b15a3c..a6b9e3177e 100644
--- a/modules/juce_gui_basics/layout/juce_FlexBox.cpp
+++ b/modules/juce_gui_basics/layout/juce_FlexBox.cpp
@@ -37,8 +37,8 @@ struct FlexBoxLayoutCalculation
                           || fb.flexDirection == FlexBox::Direction::rowReverse),
          containerLineLength (isRowDirection ? parentWidth : parentHeight)
     {
-        lineItems.calloc ((size_t) (numItems * numItems));
-        lineInfo.calloc ((size_t) numItems);
+        lineItems.calloc (numItems * numItems);
+        lineInfo.calloc (numItems);
     }
 
     struct ItemWithState
diff --git a/modules/juce_gui_basics/native/juce_linux_X11_Windowing.cpp b/modules/juce_gui_basics/native/juce_linux_X11_Windowing.cpp
index 0182cf4776..865b5143c1 100644
--- a/modules/juce_gui_basics/native/juce_linux_X11_Windowing.cpp
+++ b/modules/juce_gui_basics/native/juce_linux_X11_Windowing.cpp
@@ -578,7 +578,7 @@ public:
                 const int pixStride = 2;
                 const int stride = ((w * pixStride + 3) & ~3);
 
-                imageData16Bit.malloc ((size_t) (stride * h));
+                imageData16Bit.malloc (stride * h);
                 xImage->data = imageData16Bit;
                 xImage->bitmap_pad = 16;
                 xImage->depth = pixStride * 8;
@@ -1946,7 +1946,7 @@ public:
     void setIcon (const Image& newIcon) override
     {
         const int dataSize = newIcon.getWidth() * newIcon.getHeight() + 2;
-        HeapBlock<unsigned long> data ((size_t) dataSize);
+        HeapBlock<unsigned long> data (dataSize);
 
         int index = 0;
         data[index++] = (unsigned long) newIcon.getWidth();
diff --git a/modules/juce_gui_basics/native/juce_win32_Windowing.cpp b/modules/juce_gui_basics/native/juce_win32_Windowing.cpp
index 695d2fd0aa..8c487c20b2 100644
--- a/modules/juce_gui_basics/native/juce_win32_Windowing.cpp
+++ b/modules/juce_gui_basics/native/juce_win32_Windowing.cpp
@@ -3492,7 +3492,7 @@ private:
                 if (attributeSizeBytes > 0)
                 {
                     // Get attributes (8 bit flag per character):
-                    HeapBlock<char> attributes ((size_t) attributeSizeBytes);
+                    HeapBlock<char> attributes (attributeSizeBytes);
                     ImmGetCompositionString (hImc, GCS_COMPATTR, attributes, (DWORD) attributeSizeBytes);
 
                     selectionStart = 0;
diff --git a/modules/juce_opengl/opengl/juce_OpenGLGraphicsContext.cpp b/modules/juce_opengl/opengl/juce_OpenGLGraphicsContext.cpp
index 4aaeb2ffb5..9d2ecaa352 100644
--- a/modules/juce_opengl/opengl/juce_OpenGLGraphicsContext.cpp
+++ b/modules/juce_opengl/opengl/juce_OpenGLGraphicsContext.cpp
@@ -299,7 +299,7 @@ private:
             : area (et.getMaximumBounds().withSize (nextPowerOfTwo (et.getMaximumBounds().getWidth()),
                                                     nextPowerOfTwo (et.getMaximumBounds().getHeight())))
         {
-            data.calloc ((size_t) (area.getWidth() * area.getHeight()));
+            data.calloc (area.getWidth() * area.getHeight());
             et.iterate (*this);
         }
 
diff --git a/modules/juce_opengl/opengl/juce_OpenGLImage.cpp b/modules/juce_opengl/opengl/juce_OpenGLImage.cpp
index 4b748a2eb6..b4deaaf2cd 100644
--- a/modules/juce_opengl/opengl/juce_OpenGLImage.cpp
+++ b/modules/juce_opengl/opengl/juce_OpenGLImage.cpp
@@ -103,8 +103,8 @@ private:
 
         static void verticalRowFlip (PixelARGB* const data, const int w, const int h)
         {
-            HeapBlock<PixelARGB> tempRow ((size_t) w);
-            const size_t rowSize = sizeof (PixelARGB) * (size_t) w;
+            HeapBlock<PixelARGB> tempRow (w);
+            auto rowSize = sizeof (PixelARGB) * (size_t) w;
 
             for (int y = 0; y < h / 2; ++y)
             {
@@ -125,8 +125,8 @@ private:
 
         void write (const PixelARGB* const data) const noexcept
         {
-            HeapBlock<PixelARGB> invertedCopy ((size_t) (area.getWidth() * area.getHeight()));
-            const size_t rowSize = sizeof (PixelARGB) * (size_t) area.getWidth();
+            HeapBlock<PixelARGB> invertedCopy (area.getWidth() * area.getHeight());
+            auto rowSize = sizeof (PixelARGB) * (size_t) area.getWidth();
 
             for (int y = 0; y < area.getHeight(); ++y)
                 memcpy (invertedCopy + area.getWidth() * y,
diff --git a/modules/juce_opengl/opengl/juce_OpenGLTexture.cpp b/modules/juce_opengl/opengl/juce_OpenGLTexture.cpp
index d29adccc72..4fdeeee745 100644
--- a/modules/juce_opengl/opengl/juce_OpenGLTexture.cpp
+++ b/modules/juce_opengl/opengl/juce_OpenGLTexture.cpp
@@ -107,12 +107,12 @@ struct Flipper
     static void flip (HeapBlock<PixelARGB>& dataCopy, const uint8* srcData, const int lineStride,
                       const int w, const int h)
     {
-        dataCopy.malloc ((size_t) (w * h));
+        dataCopy.malloc (w * h);
 
         for (int y = 0; y < h; ++y)
         {
-            const PixelType* src = (const PixelType*) srcData;
-            PixelARGB* const dst = (PixelARGB*) (dataCopy + w * (h - 1 - y));
+            auto* src = (const PixelType*) srcData;
+            auto* dst = (PixelARGB*) (dataCopy + w * (h - 1 - y));
 
             for (int x = 0; x < w; ++x)
                 dst[x].set (src[x]);