Expr resolves the specified expression.

File resolves the specified file.

name is local to some enclosing function.

name is global to module.

name is local to its function.

name is predeclared for this module (e.g.

name is not defined.

name is universal (e.g.

allow bitwise operations (&, |, ^, ~, <<, and >>).

allow floating point literals, the 'float' built-in, and x / y.

allow reassignment to globals declared in same file (deprecated).

allow lambda expressions.

allow def statements within function bodies.

allow the 'set' built-in.

An Error describes the nature and position of a resolver error.

An ErrorList is a non-empty list of resolver error messages.

The Scope of a syntax.Ident indicates what kind of scope it has.