parsertest

Documentation

Index

• func ParseDir(t testing.TB, fset *token.FileSet, path string, filter func(fs.FileInfo) bool, ...) (pkgs map[string]*ast.Package)
• func ParseExpr(t testing.TB, x string) ast.Expr
• func ParseExprFrom(t testing.TB, fset *token.FileSet, filename string, src any, mode parser.Mode) (expr ast.Expr)
• func ParseFile(t testing.TB, fset *token.FileSet, filename string, src any, mode parser.Mode) (f *ast.File)

Functions

func ParseDir

func ParseDir(t testing.TB, fset *token.FileSet, path string, filter func(fs.FileInfo) bool, mode parser.Mode) (pkgs map[string]*ast.Package)

ParseDir calls ParseFile for all files with names ending in ".go" in the directory specified by path and returns a map of package name -> package AST with all the packages found.

If filter != nil, only the files with fs.FileInfo entries passing through the filter (and ending in ".go") are considered. The mode bits are passed to ParseFile unchanged. Position information is recorded in fset, which must not be nil.

If the directory couldn't be read, a nil map and the respective error are returned. If a parse error occurred, a non-nil but incomplete map and the first error encountered are returned.

func ParseExpr

func ParseExpr(t testing.TB, x string) ast.Expr

ParseExpr is a convenience function for obtaining the AST of an expression x. The position information recorded in the AST is undefined. The filename used in error messages is the empty string.

If syntax errors were found, the result is a partial AST (with ast.Bad* nodes representing the fragments of erroneous source code). Multiple errors are returned via a scanner.ErrorList which is sorted by source position.

func ParseExprFrom

func ParseExprFrom(t testing.TB, fset *token.FileSet, filename string, src any, mode parser.Mode) (expr ast.Expr)

ParseExprFrom is a convenience function for parsing an expression. The arguments have the same meaning as for ParseFile, but the source must be a valid Go (type or value) expression. Specifically, fset must not be nil.

If the source couldn't be read, the returned AST is nil and the error indicates the specific failure. If the source was read but syntax errors were found, the result is a partial AST (with ast.Bad* nodes representing the fragments of erroneous source code). Multiple errors are returned via a scanner.ErrorList which is sorted by source position.

func ParseFile

func ParseFile(t testing.TB, fset *token.FileSet, filename string, src any, mode parser.Mode) (f *ast.File)

ParseFile parses the source code of a single Go source file and returns the corresponding ast.File node. The source code may be provided via the filename of the source file, or via the src parameter.

If src != nil, ParseFile parses the source from src and the filename is only used when recording position information. The type of the argument for the src parameter must be string, []byte, or io.Reader. If src == nil, ParseFile parses the file specified by filename.

The mode parameter controls the amount of source text parsed and other optional parser functionality. If the [SkipObjectResolution] mode bit is set (recommended), the object resolution phase of parsing will be skipped, causing File.Scope, File.Unresolved, and all Ident.Obj fields to be nil. Those fields are deprecated; see ast.Object for details.

Position information is recorded in the file set fset, which must not be nil.

If the source couldn't be read, the returned AST is nil and the error indicates the specific failure. If the source was read but syntax errors were found, the result is a partial AST (with ast.Bad* nodes representing the fragments of erroneous source code). Multiple errors are returned via a scanner.ErrorList which is sorted by source position.