Introduce emit statement.

8 files changed, 64 insertions, 1 deletions

diff --git a/libsolidity/ast/AST.h b/libsolidity/ast/AST.h
index feffde64..c0d55aec 100644
--- a/libsolidity/ast/AST.h
+++ b/libsolidity/ast/AST.h
@@ -1197,6 +1197,27 @@ public:
 };
 
 /**
+ * The emit statement is used to emit events: emit EventName(arg1, ..., argn)
+ */
+class EmitStatement: public Statement
+{
+public:
+	explicit EmitStatement(
+		SourceLocation const& _location,
+		ASTPointer<ASTString> const& _docString,
+		ASTPointer<FunctionCall> const& _functionCall
+	):
+		Statement(_location, _docString), m_eventCall(_functionCall) {}
+	virtual void accept(ASTVisitor& _visitor) override;
+	virtual void accept(ASTConstVisitor& _visitor) const override;
+
+	FunctionCall const& eventCall() const { return *m_eventCall; }
+
+private:
+	ASTPointer<FunctionCall> m_eventCall;
+};
+
+/**
  * Definition of a variable as a statement inside a function. It requires a type name (which can
  * also be "var") but the actual assignment can be missing.
  * Examples: var a = 2; uint256 a;
diff --git a/libsolidity/ast/ASTForward.h b/libsolidity/ast/ASTForward.h
index 46675e51..992fe4cd 100644
--- a/libsolidity/ast/ASTForward.h
+++ b/libsolidity/ast/ASTForward.h
@@ -69,6 +69,7 @@ class Continue;
 class Break;
 class Return;
 class Throw;
+class EmitStatement;
 class VariableDeclarationStatement;
 class ExpressionStatement;
 class Expression;
diff --git a/libsolidity/ast/ASTJsonConverter.cpp b/libsolidity/ast/ASTJsonConverter.cpp
index cd9f7eca..4fef67c3 100644
--- a/libsolidity/ast/ASTJsonConverter.cpp
+++ b/libsolidity/ast/ASTJsonConverter.cpp
@@ -540,7 +540,15 @@ bool ASTJsonConverter::visit(Return const& _node)
 
 bool ASTJsonConverter::visit(Throw const& _node)
 {
-	setJsonNode(_node, "Throw", {});;
+	setJsonNode(_node, "Throw", {});
+	return false;
+}
+
+bool ASTJsonConverter::visit(EmitStatement const& _node)
+{
+	setJsonNode(_node, "EmitStatement", {
+		make_pair("eventCall", toJson(_node.eventCall()))
+	});
 	return false;
 }
 
diff --git a/libsolidity/ast/ASTJsonConverter.h b/libsolidity/ast/ASTJsonConverter.h
index 9a886220..88b93699 100644
--- a/libsolidity/ast/ASTJsonConverter.h
+++ b/libsolidity/ast/ASTJsonConverter.h
@@ -91,6 +91,7 @@ public:
 	bool visit(Break const& _node) override;
 	bool visit(Return const& _node) override;
 	bool visit(Throw const& _node) override;
+	bool visit(EmitStatement const& _node) override;
 	bool visit(VariableDeclarationStatement const& _node) override;
 	bool visit(ExpressionStatement const& _node) override;
 	bool visit(Conditional const& _node) override;
diff --git a/libsolidity/ast/ASTPrinter.cpp b/libsolidity/ast/ASTPrinter.cpp
index 23c3cbe1..4273f225 100644
--- a/libsolidity/ast/ASTPrinter.cpp
+++ b/libsolidity/ast/ASTPrinter.cpp
@@ -258,6 +258,13 @@ bool ASTPrinter::visit(Throw const& _node)
 	return goDeeper();
 }
 
+bool ASTPrinter::visit(EmitStatement const& _node)
+{
+	writeLine("EmitStatement");
+	printSourcePart(_node);
+	return goDeeper();
+}
+
 bool ASTPrinter::visit(VariableDeclarationStatement const& _node)
 {
 	writeLine("VariableDeclarationStatement");
@@ -517,6 +524,11 @@ void ASTPrinter::endVisit(Throw const&)
 	m_indentation--;
 }
 
+void ASTPrinter::endVisit(EmitStatement const&)
+{
+	m_indentation--;
+}
+
 void ASTPrinter::endVisit(VariableDeclarationStatement const&)
 {
 	m_indentation--;
diff --git a/libsolidity/ast/ASTPrinter.h b/libsolidity/ast/ASTPrinter.h
index 01e4f7fc..de3bf8a2 100644
--- a/libsolidity/ast/ASTPrinter.h
+++ b/libsolidity/ast/ASTPrinter.h
@@ -76,6 +76,7 @@ public:
 	bool visit(Break const& _node) override;
 	bool visit(Return const& _node) override;
 	bool visit(Throw const& _node) override;
+	bool visit(EmitStatement const& _node) override;
 	bool visit(VariableDeclarationStatement const& _node) override;
 	bool visit(ExpressionStatement const& _node) override;
 	bool visit(Conditional const& _node) override;
@@ -120,6 +121,7 @@ public:
 	void endVisit(Break const&) override;
 	void endVisit(Return const&) override;
 	void endVisit(Throw const&) override;
+	void endVisit(EmitStatement const&) override;
 	void endVisit(VariableDeclarationStatement const&) override;
 	void endVisit(ExpressionStatement const&) override;
 	void endVisit(Conditional const&) override;
diff --git a/libsolidity/ast/ASTVisitor.h b/libsolidity/ast/ASTVisitor.h
index b726d592..b1389f0f 100644
--- a/libsolidity/ast/ASTVisitor.h
+++ b/libsolidity/ast/ASTVisitor.h
@@ -73,6 +73,7 @@ public:
 	virtual bool visit(Break& _node) { return visitNode(_node); }
 	virtual bool visit(Return& _node) { return visitNode(_node); }
 	virtual bool visit(Throw& _node) { return visitNode(_node); }
+	virtual bool visit(EmitStatement& _node) { return visitNode(_node); }
 	virtual bool visit(VariableDeclarationStatement& _node) { return visitNode(_node); }
 	virtual bool visit(ExpressionStatement& _node) { return visitNode(_node); }
 	virtual bool visit(Conditional& _node) { return visitNode(_node); }
@@ -118,6 +119,7 @@ public:
 	virtual void endVisit(Break& _node) { endVisitNode(_node); }
 	virtual void endVisit(Return& _node) { endVisitNode(_node); }
 	virtual void endVisit(Throw& _node) { endVisitNode(_node); }
+	virtual void endVisit(EmitStatement& _node) { endVisitNode(_node); }
 	virtual void endVisit(VariableDeclarationStatement& _node) { endVisitNode(_node); }
 	virtual void endVisit(ExpressionStatement& _node) { endVisitNode(_node); }
 	virtual void endVisit(Conditional& _node) { endVisitNode(_node); }
@@ -175,6 +177,7 @@ public:
 	virtual bool visit(Break const& _node) { return visitNode(_node); }
 	virtual bool visit(Return const& _node) { return visitNode(_node); }
 	virtual bool visit(Throw const& _node) { return visitNode(_node); }
+	virtual bool visit(EmitStatement const& _node) { return visitNode(_node); }
 	virtual bool visit(VariableDeclarationStatement const& _node) { return visitNode(_node); }
 	virtual bool visit(ExpressionStatement const& _node) { return visitNode(_node); }
 	virtual bool visit(Conditional const& _node) { return visitNode(_node); }
@@ -220,6 +223,7 @@ public:
 	virtual void endVisit(Break const& _node) { endVisitNode(_node); }
 	virtual void endVisit(Return const& _node) { endVisitNode(_node); }
 	virtual void endVisit(Throw const& _node) { endVisitNode(_node); }
+	virtual void endVisit(EmitStatement const& _node) { endVisitNode(_node); }
 	virtual void endVisit(VariableDeclarationStatement const& _node) { endVisitNode(_node); }
 	virtual void endVisit(ExpressionStatement const& _node) { endVisitNode(_node); }
 	virtual void endVisit(Conditional const& _node) { endVisitNode(_node); }
diff --git a/libsolidity/ast/AST_accept.h b/libsolidity/ast/AST_accept.h
index 904d9ff6..70ee997e 100644
--- a/libsolidity/ast/AST_accept.h
+++ b/libsolidity/ast/AST_accept.h
@@ -541,6 +541,20 @@ void Throw::accept(ASTConstVisitor& _visitor) const
 	_visitor.endVisit(*this);
 }
 
+void EmitStatement::accept(ASTVisitor& _visitor)
+{
+	if (_visitor.visit(*this))
+		m_eventCall->accept(_visitor);
+	_visitor.endVisit(*this);
+}
+
+void EmitStatement::accept(ASTConstVisitor& _visitor) const
+{
+	if (_visitor.visit(*this))
+		m_eventCall->accept(_visitor);
+	_visitor.endVisit(*this);
+}
+
 void ExpressionStatement::accept(ASTVisitor& _visitor)
 {
 	if (_visitor.visit(*this))