import "go/doc"
Package doc extracts source code documentation from a Go AST.
var IllegalPrefixes = []string{ "copyright", "all rights", "author", }
func IsPredeclared(s string) bool
IsPredeclared reports whether s is a predeclared identifier.
func Synopsis(s string) string
Synopsis returns a cleaned version of the first sentence in s. That sentence ends after the first period followed by space and not preceded by exactly one uppercase letter. The result string has no \n, \r, or \t characters and uses only single spaces between words. If s starts with any of the IllegalPrefixes, the result is the empty string.
func ToHTML(w io.Writer, text string, words map[string]string)
ToHTML converts comment text to formatted HTML. The comment was prepared by DocReader, so it is known not to have leading, trailing blank lines nor to have trailing spaces at the end of lines. The comment markers have already been removed.
Each span of unindented non-blank lines is converted into a single paragraph. There is one exception to the rule: a span that consists of a single line, is followed by another paragraph span, begins with a capital letter, and contains no punctuation other than parentheses and commas is formatted as a heading.
A span of indented lines is converted into a <pre> block, with the common indent prefix removed.
URLs in the comment text are converted into links; if the URL also appears in the words map, the link is taken from the map (if the corresponding map value is the empty string, the URL is not converted into a link).
Go identifiers that appear in the words map are italicized; if the corresponding map value is not the empty string, it is considered a URL and the word is converted into a link.
func ToText(w io.Writer, text string, indent, preIndent string, width int)
ToText prepares comment text for presentation in textual output. It wraps paragraphs of text to width or fewer Unicode code points and then prefixes each line with the indent. In preformatted sections (such as program text), it prefixes each non-blank line with preIndent.
type Example struct {
Name string // name of the item being exemplified
Doc string // example function doc string
Code ast.Node
Play *ast.File // a whole program version of the example
Comments []*ast.CommentGroup
Output string // expected output
Unordered bool
EmptyOutput bool // expect empty output
Order int // original source code order
}
An Example represents an example function found in a source files.
func Examples(files ...*ast.File) []*Example
Examples returns the examples found in the files, sorted by Name field. The Order fields record the order in which the examples were encountered.
Playable Examples must be in a package whose name ends in "_test". An Example is "playable" (the Play field is non-nil) in either of these circumstances:
- The example function is self-contained: the function references only identifiers from other packages (or predeclared identifiers, such as "int") and the test file does not include a dot import. - The entire test file is the example: the file contains exactly one example function, zero test or benchmark functions, and at least one top-level function, type, variable, or constant declaration other than the example function.
type Filter func(string) bool
type Func struct {
Doc string
Name string
Decl *ast.FuncDecl
// methods
// (for functions, these fields have the respective zero value)
Recv string // actual receiver "T" or "*T"
Orig string // original receiver "T" or "*T"
Level int // embedding level; 0 means not embedded
}
Func is the documentation for a func declaration.
type Mode int
Mode values control the operation of New.
const (
// AllDecls says to extract documentation for all package-level
// declarations, not just exported ones.
AllDecls Mode = 1 << iota
// AllMethods says to show all embedded methods, not just the ones of
// invisible (unexported) anonymous fields.
AllMethods
// PreserveAST says to leave the AST unmodified. Originally, pieces of
// the AST such as function bodies were nil-ed out to save memory in
// godoc, but not all programs want that behavior.
PreserveAST
)
type Note struct {
Pos, End token.Pos // position range of the comment containing the marker
UID string // uid found with the marker
Body string // note body text
}
A Note represents a marked comment starting with "MARKER(uid): note body". Any note with a marker of 2 or more upper case [A-Z] letters and a uid of at least one character is recognized. The ":" following the uid is optional. Notes are collected in the Package.Notes map indexed by the notes marker.
type Package struct {
Doc string
Name string
ImportPath string
Imports []string
Filenames []string
Notes map[string][]*Note
// Deprecated: For backward compatibility Bugs is still populated,
// but all new code should use Notes instead.
Bugs []string
// declarations
Consts []*Value
Types []*Type
Vars []*Value
Funcs []*Func
}
Package is the documentation for an entire package.
func New(pkg *ast.Package, importPath string, mode Mode) *Package
New computes the package documentation for the given package AST. New takes ownership of the AST pkg and may edit or overwrite it.
func (p *Package) Filter(f Filter)
Filter eliminates documentation for names that don't pass through the filter f. TODO(gri): Recognize "Type.Method" as a name.
type Type struct {
Doc string
Name string
Decl *ast.GenDecl
// associated declarations
Consts []*Value // sorted list of constants of (mostly) this type
Vars []*Value // sorted list of variables of (mostly) this type
Funcs []*Func // sorted list of functions returning this type
Methods []*Func // sorted list of methods (including embedded ones) of this type
}
Type is the documentation for a type declaration.
type Value struct {
Doc string
Names []string // var or const names in declaration order
Decl *ast.GenDecl
// contains filtered or unexported fields
}
Value is the documentation for a (possibly grouped) var or const declaration.