How Can I Statically Resolve Identifier Types in Go?

Golang Static Identifier Resolution: Determining Identifier Types

In Go, determining the type of a static identifier is essential for static analysis of function calls. However, the go/ast library provides limited information for this purpose. To resolve static identifier types, we need to delve deeper into Go's type system.

The go/types package within golang.org/x/tools/go offers the necessary capabilities for type checking and type inference. Using the Types mapping within the types.Info structure for the AST's package, we can obtain the type of an expression that is not an identifier.

For identifiers, examining the Uses mapping will reveal the corresponding types.Object, which in this case is a local variable. This provides us with the type information we need for statically resolving identifier types.

The go/loader package can simplify the process of managing type information by automatically handling import dependencies and providing a comprehensive stdlib_test.go file as a useful starting point.

In summary, utilizing the go/types and go/loader packages enables us to determine the type of static identifiers, facilitating static analysis of function calls in Go projects.

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