diff --git a/src/go/ast/ast.go b/src/go/ast/ast.go
index 8195ec022f..2456020c5e 100644
--- a/src/go/ast/ast.go
+++ b/src/go/ast/ast.go
@@ -372,7 +372,9 @@ type (
 		Args     []Expr    // function arguments; or nil
 		Ellipsis token.Pos // position of "..." (token.NoPos if there is no "...")
 		Rparen   token.Pos // position of ")"
-		Brackets bool      // if set, "[" and "]" are used instead of "(" and ")"
+		// TODO(rFindley) use a new ListExpr type rather than overloading CallExpr
+		//                via Brackets, as is done in the syntax package
+		Brackets bool // if set, "[" and "]" are used instead of "(" and ")"
 	}
 
 	// A StarExpr node represents an expression of the form "*" Expression.
@@ -987,6 +989,8 @@ type (
 		Name *Ident        // function/method name
 		Type *FuncType     // function signature: type and value parameters, results, and position of "func" keyword
 		Body *BlockStmt    // function body; or nil for external (non-Go) function
+		// TODO(rFindley) consider storing TParams here, rather than FuncType, as
+		//                they are only valid for declared functions
 	}
 )
 
diff --git a/src/go/parser/parser.go b/src/go/parser/parser.go
index 9c414c411e..24e84d5103 100644
--- a/src/go/parser/parser.go
+++ b/src/go/parser/parser.go
@@ -798,7 +798,7 @@ func (p *parser) parseFieldDecl(scope *ast.Scope) *ast.Field {
 	} else {
 		// embedded, possibly generic type
 		// (using the enclosing parentheses to distinguish it from a named field declaration)
-		// TODO(gri) confirm that this doesn't allow parenthesized embedded type
+		// TODO(rFindley) confirm that this doesn't allow parenthesized embedded type
 		typ = p.parseType()
 	}
 
@@ -870,6 +870,7 @@ type field struct {
 }
 
 func (p *parser) parseParamDecl(name *ast.Ident) (f field) {
+	// TODO(rFindley) compare with parser.paramDeclOrNil in the syntax package
 	if p.trace {
 		defer un(trace(p, "ParamDeclOrNil"))
 	}
diff --git a/src/go/types/typestring.go b/src/go/types/typestring.go
index c82fa3395b..b9c227d460 100644
--- a/src/go/types/typestring.go
+++ b/src/go/types/typestring.go
@@ -313,6 +313,7 @@ func writeTypeList(buf *bytes.Buffer, list []Type, qf Qualifier, visited []Type)
 }
 
 func writeTParamList(buf *bytes.Buffer, list []*TypeName, qf Qualifier, visited []Type) {
+	// TODO(rFindley) compare this with the corresponding implementation in types2
 	buf.WriteString("[")
 	var prev Type
 	for i, p := range list {