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anymore.\n\n## Installation\n\nGo version 1.16+\n\n```bash\ngo get github.com/go-toolsmith/astcast\n```\n\n## Example\n\n```go\npackage main\n\nimport (\n\t\"fmt\"\n\n\t\"github.com/go-toolsmith/astcast\"\n\t\"github.com/go-toolsmith/strparse\"\n)\n\nfunc main() {\n\tx := strparse.Expr(`(foo * bar) + 1`)\n\n\t// x type is ast.Expr, we want to access bar operand\n\t// that is a RHS of the LHS of the addition.\n\t// Note that addition LHS (X field) is has parenthesis,\n\t// so we have to remove them too.\n\n\tadd := astcast.ToBinaryExpr(x)\n\tmul := astcast.ToBinaryExpr(astcast.ToParenExpr(add.X).X)\n\tbar := astcast.ToIdent(mul.Y)\n\tfmt.Printf(\"%T %s\\n\", bar, bar.Name) // =\u003e *ast.Ident bar\n\n\t// If argument has different dynamic type,\n\t// non-nil sentinel object of requested type is returned.\n\t// Those sentinel objects are exported so if you need\n\t// to know whether it was a nil interface value of\n\t// failed type assertion, you can compare returned\n\t// object with such a sentinel.\n\n\ty := astcast.ToCallExpr(strparse.Expr(`x`))\n\tif y == astcast.NilCallExpr {\n\t\tfmt.Println(\"it is a sentinel, type assertion failed\")\n\t}\n}\n```\n\nWithout `astcast`, you would have to do a lots of type assertions:\n\n```go\npackage main\n\nimport (\n\t\"fmt\"\n\n\t\"github.com/go-toolsmith/strparse\"\n)\n\nfunc main() {\n\tx := strparse.Expr(`(foo * bar) + 1`)\n\n\tadd, ok := x.(*ast.BinaryExpr)\n\tif !ok || add == nil {\n\t\treturn\n\t}\n\tadditionLHS, ok := add.X.(*ast.ParenExpr)\n\tif !ok || additionLHS == nil {\n\t\treturn\n\t}\n\tmul, ok := additionLHS.X.(*ast.BinaryExpr)\n\tif !ok || mul == nil {\n\t\treturn\n\t}\n\tbar, ok := mul.Y.(*ast.Ident)\n\tif !ok || bar == nil {\n\t\treturn\n\t}\n\tfmt.Printf(\"%T %s\\n\", bar, bar.Name)\n}\n```\n\n## License\n\n[MIT License](LICENSE).\n\n[build-img]: https://github.com/go-toolsmith/astcast/workflows/build/badge.svg\n[build-url]: https://github.com/go-toolsmith/astcast/actions\n[pkg-img]: https://pkg.go.dev/badge/go-toolsmith/astcast\n[pkg-url]: https://pkg.go.dev/github.com/go-toolsmith/astcast\n[reportcard-img]: https://goreportcard.com/badge/go-toolsmith/astcast\n[reportcard-url]: https://goreportcard.com/report/go-toolsmith/astcast\n[version-img]: https://img.shields.io/github/v/release/go-toolsmith/astcast\n[version-url]: https://github.com/go-toolsmith/astcast/releases\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fgo-toolsmith%2Fastcast","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fgo-toolsmith%2Fastcast","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fgo-toolsmith%2Fastcast/lists"}