Yul: Adds parsing @src comment in AsmParser to customize the AST's sourcer locations.

libsolidity/interface/CompilerStack.cpp

@@ -80,7 +80,6 @@
 
 #include <utility>
 #include <map>
-#include <range/v3/view/concat.hpp>
 
 #include <boost/algorithm/string/replace.hpp>
 
@@ -927,6 +926,19 @@ map<string, unsigned> CompilerStack::sourceIndices() const
 	return indices;
 }
 
+map<unsigned, shared_ptr<CharStream>> CompilerStack::indicesToCharStreams() const
+{
+	map<unsigned, shared_ptr<CharStream>> result;
+	unsigned index = 0;
+	for (auto const& s: m_sources)
+		result[index++] = s.second.scanner->charStream();
+
+	// NB: CompilerContext::yulUtilityFileName() does not have a source,
+	result[index++] = shared_ptr<CharStream>{};
+
+	return result;
+}
+
 Json::Value const& CompilerStack::contractABI(string const& _contractName) const
 {
 	if (m_stackState < AnalysisPerformed)

libsolidity/interface/CompilerStack.h

@@ -239,6 +239,10 @@ public:
 	/// by sourceNames().
 	std::map<std::string, unsigned> sourceIndices() const;
 
+	/// @returns the reverse mapping of source indices to their respective
+	/// CharStream instances.
+	std::map<unsigned, std::shared_ptr<langutil::CharStream>> indicesToCharStreams() const;
+
 	/// @returns the previously used scanner, useful for counting lines during error reporting.
 	langutil::Scanner const& scanner(std::string const& _sourceName) const;