Make SourceMap a value type (#2812)

* #include an absolute path didn't work - because paths were taken to always be relative.

* Moved JSON source map writing logic to JSONSourceMapUtil.

* Use ArtifactHandler to read/write SourceMaps.
Use ObjectCastableAdapter to hold SourceMap
Only serialize SourceMap <-> JSON on demand.

* Make some types swappable.

* BoxValue impl.

* Added asBoxValue.

* Remove const get funcs.

* Fix typo in asBoxValue.

* Fix another typo in asBoxValue.

* Slightly simplify conversion to blob of SourceMap.

* Small fix for asBoxValue

1 files changed, 13 insertions, 1 deletions

diff --git a/source/compiler-core/slang-source-map.cpp b/source/compiler-core/slang-source-map.cpp
index 4ea50eb3f..7a6e368a4 100644
--- a/source/compiler-core/slang-source-map.cpp
+++ b/source/compiler-core/slang-source-map.cpp
@@ -4,7 +4,7 @@ namespace Slang {
 
 void SourceMap::clear()
 {
-    String empty;
+    const String empty;
 
     m_file = empty;
     m_sourceRoot = empty;
@@ -23,6 +23,18 @@ void SourceMap::clear()
     m_slicePool.clear();
 }
 
+void SourceMap::swapWith(ThisType& rhs)
+{
+    m_file.swapWith(rhs.m_file);
+    m_sourceRoot.swapWith(rhs.m_sourceRoot);
+    m_sources.swapWith(rhs.m_sources);
+    m_names.swapWith(rhs.m_names);
+    m_sourcesContent.swapWith(rhs.m_sourcesContent);
+    m_lineStarts.swapWith(rhs.m_lineStarts);
+    m_lineEntries.swapWith(rhs.m_lineEntries);
+    m_slicePool.swapWith(rhs.m_slicePool);
+}
+
 void SourceMap::advanceToLine(Index nextLineIndex)
 {
     const Count currentLineIndex = getGeneratedLineCount() - 1;