gotools/internal/typesinternal/zerovalue.go

// ZeroString returns the string representation of the "zero" value of the type t.
// This string can be used on the right-hand side of an assignment where the
// left-hand side has that explicit type.
// Exception: This does not apply to tuples. Their string representation is
// informational only and cannot be used in an assignment.
// When assigning to a wider type (such as 'any'), it's the caller's
// responsibility to handle any necessary type conversions.
// See [ZeroExpr] for a variant that returns an [ast.Expr].
func ZeroString(t types.Type, qf types.Qualifier) string { … }

// ZeroExpr returns the ast.Expr representation of the "zero" value of the type t.
// ZeroExpr is defined for types that are suitable for variables.
// It may panic for other types such as Tuple or Union.
// See [ZeroString] for a variant that returns a string.
func ZeroExpr(f *ast.File, pkg *types.Package, typ types.Type) ast.Expr { … }

// IsZeroExpr uses simple syntactic heuristics to report whether expr
// is a obvious zero value, such as 0, "", nil, or false.
// It cannot do better without type information.
func IsZeroExpr(expr ast.Expr) bool { … }

// TypeExpr returns syntax for the specified type. References to named types
// from packages other than pkg are qualified by an appropriate package name, as
// defined by the import environment of file.
// It may panic for types such as Tuple or Union.
func TypeExpr(f *ast.File, pkg *types.Package, typ types.Type) ast.Expr { … }