astutil

package

v0.0.0-...-5b643b5 Latest Latest Go to latest Published: Aug 31, 2025 License: Apache-2.0 Imports: 21 Imported by: 0

Details

Package astutil defines utilities for ast and dst.

parser defines general utilities for codegen.

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func BufPrintf(w io.Writer) (func(format string, args ...any), func() error)

BufPrintf wraps w and returns it in a function which works as like printf. Call second return value to retrieve io error in case it happens.

func FieldAst(st *ast.StructType) iter.Seq[FieldDescAst]

func FieldDst(st *dst.StructType) iter.Seq[FieldDescDst]

func Nth[I ints](d I) string

func PrintAstExprPanicking(expr ast.Expr) string

func PrintFieldDesc(typeName string, i int, field *types.Var) string

func PrintFileHeader(w io.Writer, af *ast.File, fset *token.FileSet) error

func PrintTypeParamsAst(ts *ast.TypeSpec) string

func PrintTypeParamsDst(ts *dst.TypeSpec) string

func TrimPackageComment(f *dst.File)

TrimPackageComment removes all package comment lines except build constratints.

func TypeToAst(ty types.Type, pkgPath string, importMap imports.ImportMap) ast.Expr

func TypeToDst(ty types.Type, pkgPath string, importMap imports.ImportMap) dst.Expr

type FieldDescAst struct {
	// Pos indicates ith field of the type.
	Pos int
	// Name is field name.
	Name  string
	Field *ast.Field
}

type FieldDescDst struct {
	Pos   int
	Name  string
	Field *dst.Field
}

type Parser struct {
	// contains filtered or unexported fields
}

Parser is as much similar as `go/parser` but ignores specific nodes in file.

func NewParser(dir string) *Parser

func (p *Parser) ParseFile(fset *token.FileSet, filename string, src []byte) (*ast.File, error)