From 494e09af2cebafa34db49dc1f60afd43aebed619 Mon Sep 17 00:00:00 2001
From: jsmall-nvidia <jsmall@nvidia.com>
Date: Thu, 29 Oct 2020 11:45:56 -0400
Subject: Handling imported/exporting symbols from serialized modules (#1589)

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

* Fix handling of access modifiers inside type definition.

* Fix access problem for AST node.
Make dumping produce a single function with switch, to potentially make available without Dump specific access.

* WIP on serialization design doc.

* Remove project references to previously generated files.

* More docs on serialization design.

* Improve serialization documentation.
Remove unused function from IRSerialReader.

* Small fixes around naming. Remove long comment from slang-serialize.h - as covered in serialization.md

* Remove long comment in slang-serialize.h as covered in serialization.md

* More information about doing replacements on read for AST and problems surrounding.

* Typo fix.

* Spelling fixes.

* Value serialize.

* Value types with inheritence.

* Use value reflection serial conversion for more AST types

* Use automatic serialization on more of AST.

* Get the types via decltype, simplifies what the extractor has to do.

* Update the serialization.md for the value serialization.

* Small doc improvements.

* Update project.

* Remove ImportExternalDecl type
Added addImportSymbol and ImportSymbol type
Fixed bug in container which meant it wouldn't read back AST module

* Because of change of how imports and handled, store objects as SerialPointers.

* First pass symbol lookup from mangled names.

* Cache current module looked up from mangled name.

* Fix SourceLoc bug.
Improve comments.

* Added diagnostic on mangled symbol not being found

* Fix typo.

Co-authored-by: Tim Foley <tfoleyNV@users.noreply.github.com>
---
 source/slang/slang-mangled-lexer.cpp | 55 +++++++++++++++++++++++++-----------
 1 file changed, 38 insertions(+), 17 deletions(-)

(limited to 'source/slang/slang-mangled-lexer.cpp')

diff --git a/source/slang/slang-mangled-lexer.cpp b/source/slang/slang-mangled-lexer.cpp
index f1f5ec903..237f9f2a5 100644
--- a/source/slang/slang-mangled-lexer.cpp
+++ b/source/slang/slang-mangled-lexer.cpp
@@ -7,13 +7,13 @@ namespace Slang {
 
 UInt MangledLexer::readCount()
 {
-    int c = _peek();
-    if (!_isDigit((char)c))
+    int c = peekChar();
+    if (!CharUtil::isDigit((char)c))
     {
         SLANG_UNEXPECTED("bad name mangling");
         UNREACHABLE_RETURN(0);
     }
-    _next();
+    nextChar();
 
     if (c == '0')
         return 0;
@@ -22,25 +22,25 @@ UInt MangledLexer::readCount()
     for (;;)
     {
         count = count * 10 + c - '0';
-        c = _peek();
-        if (!_isDigit((char)c))
+        c = peekChar();
+        if (!CharUtil::isDigit((char)c))
             return count;
 
-        _next();
+        nextChar();
     }
 }
 
 void MangledLexer::readGenericParam()
 {
-    switch (_peek())
+    switch (peekChar())
     {
     case 'T':
     case 'C':
-        _next();
+        nextChar();
         break;
 
     case 'v':
-        _next();
+        nextChar();
         readType();
         break;
 
@@ -62,7 +62,7 @@ void MangledLexer::readGenericParams()
 
 void MangledLexer::readType()
 {
-    int c = _peek();
+    int c = peekChar();
     switch (c)
     {
     case 'V':
@@ -73,11 +73,11 @@ void MangledLexer::readType()
     case 'h':
     case 'f':
     case 'd':
-        _next();
+        nextChar();
         break;
 
     case 'v':
-        _next();
+        nextChar();
         readSimpleIntVal();
         readType();
         break;
@@ -90,15 +90,15 @@ void MangledLexer::readType()
 
 void MangledLexer::readVal()
 {
-    switch (_peek())
+    switch (peekChar())
     {
     case 'k':
-        _next();
+        nextChar();
         readCount();
         break;
 
     case 'K':
-        _next();
+        nextChar();
         readRawStringSegment();
         break;
 
@@ -124,7 +124,7 @@ UnownedStringSlice MangledLexer::readSimpleName()
     UnownedStringSlice result;
     for (;;)
     {
-        int c = _peek();
+        int c = peekChar();
 
         if (c == 'g')
         {
@@ -142,7 +142,7 @@ UnownedStringSlice MangledLexer::readSimpleName()
             continue;
         }
 
-        if (!_isDigit((char)c))
+        if (!CharUtil::isDigit((char)c))
             return result;
 
         // Read the length part
@@ -181,4 +181,25 @@ UInt MangledLexer::readParamCount()
     return count;
 }
 
+/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! MangledNameParser !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */
+
+/* static */SlangResult MangledNameParser::parseModuleName(const UnownedStringSlice& in, UnownedStringSlice& outModuleName)
+{
+    MangledLexer lexer(in);
+
+    if (lexer.peekChar() == 'T')
+    {
+        lexer.nextChar();
+    }
+
+    UnownedStringSlice name = lexer.readRawStringSegment();
+    if (name.getLength() == 0)
+    {
+        return SLANG_FAIL;
+    }
+
+    outModuleName = name;
+    return SLANG_OK;
+}
+
 } // namespace Slang
-- 
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