func()

in internal/lsp/semantic.go [284:438]

• 145 lines of code
• 66 McCabe index (conditional complexity)

func (e *encoded) inspector(n ast.Node) bool {
	pop := func() {
		e.stack = e.stack[:len(e.stack)-1]
	}
	if n == nil {
		pop()
		return true
	}
	e.stack = append(e.stack, n)
	switch x := n.(type) {
	case *ast.ArrayType:
	case *ast.AssignStmt:
		e.token(x.TokPos, len(x.Tok.String()), tokOperator, nil)
	case *ast.BasicLit:
		if strings.Contains(x.Value, "\n") {
			// has to be a string
			e.multiline(x.Pos(), x.End(), x.Value, tokString)
			break
		}
		ln := len(x.Value)
		what := tokNumber
		if x.Kind == token.STRING {
			what = tokString
			if _, ok := e.stack[len(e.stack)-2].(*ast.Field); ok {
				// struct tags (this is probably pointless, as the
				// TextMate grammar will treat all the other comments the same)
				what = tokComment
			}
		}
		e.token(x.Pos(), ln, what, nil)
	case *ast.BinaryExpr:
		e.token(x.OpPos, len(x.Op.String()), tokOperator, nil)
	case *ast.BlockStmt:
	case *ast.BranchStmt:
		e.token(x.TokPos, len(x.Tok.String()), tokKeyword, nil)
		// There's no semantic encoding for labels
	case *ast.CallExpr:
		if x.Ellipsis != token.NoPos {
			e.token(x.Ellipsis, len("..."), tokOperator, nil)
		}
	case *ast.CaseClause:
		iam := "case"
		if x.List == nil {
			iam = "default"
		}
		e.token(x.Case, len(iam), tokKeyword, nil)
	case *ast.ChanType:
		// chan | chan <- | <- chan
		if x.Arrow == token.NoPos || x.Arrow != x.Begin {
			e.token(x.Begin, len("chan"), tokKeyword, nil)
			break
		}
		pos := e.findKeyword("chan", x.Begin+2, x.Value.Pos())
		e.token(pos, len("chan"), tokKeyword, nil)
	case *ast.CommClause:
		iam := len("case")
		if x.Comm == nil {
			iam = len("default")
		}
		e.token(x.Case, iam, tokKeyword, nil)
	case *ast.CompositeLit:
	case *ast.DeclStmt:
	case *ast.DeferStmt:
		e.token(x.Defer, len("defer"), tokKeyword, nil)
	case *ast.Ellipsis:
		e.token(x.Ellipsis, len("..."), tokOperator, nil)
	case *ast.EmptyStmt:
	case *ast.ExprStmt:
	case *ast.Field:
	case *ast.FieldList:
	case *ast.ForStmt:
		e.token(x.For, len("for"), tokKeyword, nil)
	case *ast.FuncDecl:
	case *ast.FuncLit:
	case *ast.FuncType:
		if x.Func != token.NoPos {
			e.token(x.Func, len("func"), tokKeyword, nil)
		}
	case *ast.GenDecl:
		e.token(x.TokPos, len(x.Tok.String()), tokKeyword, nil)
	case *ast.GoStmt:
		e.token(x.Go, len("go"), tokKeyword, nil)
	case *ast.Ident:
		e.ident(x)
	case *ast.IfStmt:
		e.token(x.If, len("if"), tokKeyword, nil)
		if x.Else != nil {
			// x.Body.End() or x.Body.End()+1, not that it matters
			pos := e.findKeyword("else", x.Body.End(), x.Else.Pos())
			e.token(pos, len("else"), tokKeyword, nil)
		}
	case *ast.ImportSpec:
		e.importSpec(x)
		pop()
		return false
	case *ast.IncDecStmt:
		e.token(x.TokPos, len(x.Tok.String()), tokOperator, nil)
	case *ast.IndexExpr:
	case *typeparams.IndexListExpr: // accomodate generics
	case *ast.InterfaceType:
		e.token(x.Interface, len("interface"), tokKeyword, nil)
	case *ast.KeyValueExpr:
	case *ast.LabeledStmt:
	case *ast.MapType:
		e.token(x.Map, len("map"), tokKeyword, nil)
	case *ast.ParenExpr:
	case *ast.RangeStmt:
		e.token(x.For, len("for"), tokKeyword, nil)
		// x.TokPos == token.NoPos is legal (for range foo {})
		offset := x.TokPos
		if offset == token.NoPos {
			offset = x.For
		}
		pos := e.findKeyword("range", offset, x.X.Pos())
		e.token(pos, len("range"), tokKeyword, nil)
	case *ast.ReturnStmt:
		e.token(x.Return, len("return"), tokKeyword, nil)
	case *ast.SelectStmt:
		e.token(x.Select, len("select"), tokKeyword, nil)
	case *ast.SelectorExpr:
	case *ast.SendStmt:
		e.token(x.Arrow, len("<-"), tokOperator, nil)
	case *ast.SliceExpr:
	case *ast.StarExpr:
		e.token(x.Star, len("*"), tokOperator, nil)
	case *ast.StructType:
		e.token(x.Struct, len("struct"), tokKeyword, nil)
	case *ast.SwitchStmt:
		e.token(x.Switch, len("switch"), tokKeyword, nil)
	case *ast.TypeAssertExpr:
		if x.Type == nil {
			pos := e.findKeyword("type", x.Lparen, x.Rparen)
			e.token(pos, len("type"), tokKeyword, nil)
		}
	case *ast.TypeSpec:
	case *ast.TypeSwitchStmt:
		e.token(x.Switch, len("switch"), tokKeyword, nil)
	case *ast.UnaryExpr:
		e.token(x.OpPos, len(x.Op.String()), tokOperator, nil)
	case *ast.ValueSpec:
	// things only seen with parsing or type errors, so ignore them
	case *ast.BadDecl, *ast.BadExpr, *ast.BadStmt:
		return true
	// not going to see these
	case *ast.File, *ast.Package:
		e.unexpected(fmt.Sprintf("implement %T %s", x, e.pgf.Tok.PositionFor(x.Pos(), false)))
	// other things we knowingly ignore
	case *ast.Comment, *ast.CommentGroup:
		pop()
		return false
	default:
		e.unexpected(fmt.Sprintf("failed to implement %T", x))
	}
	return true
}