57 lines
1 KiB
Go
57 lines
1 KiB
Go
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package jokelint
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import (
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"go/ast"
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"go/constant"
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"go/types"
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"golang.org/x/tools/go/analysis"
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"golang.org/x/tools/go/ast/inspector"
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)
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var Analyzer = &analysis.Analyzer{
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Name: "jokelint",
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Doc: "check for outdated jokes about go",
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Run: run,
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}
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func run(pass *analysis.Pass) (interface{}, error) {
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ins := inspector.New(pass.Files)
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// We filter only function calls.
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nodeFilter := []ast.Node{
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(*ast.CallExpr)(nil),
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}
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ins.Preorder(nodeFilter, func(n ast.Node) {
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call := n.(*ast.CallExpr)
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visitCall(pass, call)
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})
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return nil, nil
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}
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func visitCall(pass *analysis.Pass, call *ast.CallExpr) {
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fn, ok := call.Fun.(*ast.SelectorExpr)
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if !ok {
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return
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}
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def := pass.TypesInfo.Uses[fn.Sel]
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if x, ok := def.(*types.Func); !ok {
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return
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} else if x.Pkg().Path() != "fmt" || x.Name() != "Println" {
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return
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}
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if len(call.Args) != 1 {
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return
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}
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arg := call.Args[0]
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argTyp := pass.TypesInfo.Types[arg]
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if argTyp.Value != nil && constant.StringVal(argTyp.Value) == "lol no generics" {
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pass.Reportf(call.Pos(), "outdated joke")
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}
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}
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