Parse default dialect and omit when printing.

libyul/AsmAnalysis.cpp

@@ -608,7 +608,7 @@ Scope& AsmAnalyzer::scope(Block const* _block)
 }
 void AsmAnalyzer::expectValidType(YulString _type, SourceLocation const& _location)
 {
-	if (!_type.empty() && !contains(m_dialect.types, _type))
+	if (!_type.empty() && !m_dialect.types.count(_type))
 		m_errorReporter.typeError(
 			_location,
 			"\"" + _type.str() + "\" is not a valid type (user defined types are not yet supported)."

libyul/AsmParser.cpp

@@ -366,7 +366,7 @@ Parser::ElementaryOperation Parser::parseElementaryOperation()
 			location(),
 			kind,
 			YulString{currentLiteral()},
-			{}
+			kind == LiteralKind::Boolean ? m_dialect.boolType : m_dialect.defaultType
 		};
 		advance();
 		if (currentToken() == Token::Colon)
@@ -497,6 +497,9 @@ TypedName Parser::parseTypedName()
 		typedName.location.end = endPosition();
 		typedName.type = expectAsmIdentifier();
 	}
+	else
+		typedName.type = m_dialect.defaultType;
+
 	return typedName;
 }
 

libyul/AsmPrinter.cpp

@@ -23,6 +23,7 @@
 #include <libyul/AsmPrinter.h>
 #include <libyul/AsmData.h>
 #include <libyul/Exceptions.h>
+#include <libyul/Dialect.h>
 
 #include <libsolutil/CommonData.h>
 
@@ -238,7 +239,8 @@ string AsmPrinter::formatTypedName(TypedName _variable) const
 
 string AsmPrinter::appendTypeName(YulString _type) const
 {
-	if (!_type.empty())
+	if (_type.empty() || (m_dialect && _type == m_dialect->defaultType))
+		return {};
+	else
 		return ":" + _type.str();
-	return "";
 }

libyul/AsmPrinter.h

@@ -30,10 +30,16 @@ namespace solidity::yul
 {
 struct Dialect;
 
+/**
+ * Converts a parsed Yul AST into readable string representation.
+ * Ignores source locations.
+ * If a dialect is provided, the dialect's default type is omitted.
+ */
 class AsmPrinter
 {
 public:
-	explicit AsmPrinter() {}
+	AsmPrinter() {}
+	explicit AsmPrinter(Dialect const& _dialect): m_dialect(&_dialect) {}
 
 	std::string operator()(Literal const& _literal) const;
 	std::string operator()(Identifier const& _identifier) const;
@@ -53,6 +59,8 @@ public:
 private:
 	std::string formatTypedName(TypedName _variable) const;
 	std::string appendTypeName(YulString _type) const;
+
+	Dialect const* m_dialect = nullptr;
 };
 
 }

libyul/Dialect.h

@@ -51,7 +51,7 @@ struct Dialect: boost::noncopyable
 	YulString defaultType;
 	/// Type used for the literals "true" and "false".
 	YulString boolType;
-	std::vector<YulString> types;
+	std::set<YulString> types;
 
 	/// @returns the builtin function of the given name or a nullptr if it is not a builtin function.
 	virtual BuiltinFunction const* builtin(YulString /*_name*/) const { return nullptr; }

libyul/backends/evm/EVMDialect.cpp

@@ -218,6 +218,9 @@ EVMDialectTyped::EVMDialectTyped(langutil::EVMVersion _evmVersion, bool _objectA
 	EVMDialect(_evmVersion, _objectAccess)
 {
 	defaultType = "u256"_yulstring;
+	boolType = "bool"_yulstring;
+	types = {defaultType, boolType};
+
 	m_functions["lt"_yulstring].returns = {"bool"_yulstring};
 	m_functions["gt"_yulstring].returns = {"bool"_yulstring};
 	m_functions["slt"_yulstring].returns = {"bool"_yulstring};