Feature/lex memory reduction (#762)

* Only do scrubbing if needed. When allocating content try to limit size (with scrubbing each token takes up 1k), now it's 16 bytes min size.

* Don't allocate for every call to write on the CallbackWriter - use the m_appendBuffer.

* Don't allocate memory for CallbackWriter use m_appendBuffer.

* Use UnownedStringSlice for suffix output for parsing float/int literals.
Fix typo in invalidFloatingPointLiteralSuffix

* Using memory arena to hold tokens that are not in SourceManager.

* Improve comment on lexing.

* Make UnownedStringSlice allocation simpler on SourceManager.

* Fix error on gcc around UnownedStringSlice - because VC converted string + UnownedStringSlice automatically into a String.

* Fix generateName needing concat string for gcc.

* When constructing a Token in parseAttributeName - because it's a Identifier, we have to set the Name.

* Remove translation through String on getIntrinsicOp

* Make func-cbuffer-param disablable with -exclude compatibility-issue

* Move memory leak in render-test.

* From review - can just use "?:" instead of performing a concat.

1 files changed, 1 insertions, 0 deletions

diff --git a/source/core/slang-writer.h b/source/core/slang-writer.h
index 0e67684ec..b18af373f 100644
--- a/source/core/slang-writer.h
+++ b/source/core/slang-writer.h
@@ -85,6 +85,7 @@ class CallbackWriter : public AppendBufferWriter
 public:
     typedef AppendBufferWriter Parent;
     // ISlangWriter
+    SLANG_NO_THROW char* SLANG_MCALL beginAppendBuffer(size_t maxNumChars) SLANG_OVERRIDE;
     SLANG_NO_THROW virtual SlangResult SLANG_MCALL write(const char* chars, size_t numChars) SLANG_OVERRIDE;
     
     CallbackWriter(SlangDiagnosticCallback callback, const void* data, WriterFlags flags) :