go/src/cmd/dist/buildtag.go

type exprParser …

type val …

type exprToken …

var exprTokens …

func init() { … }

// matchexpr parses and evaluates the //go:build expression x.
func matchexpr(x string) (matched bool, err error) { … }

// parse parses an expression, including binary operators at precedence >= prec.
func (p *exprParser) parse(prec int) val { … }

// not is the prefix parser for a ! token.
func (p *exprParser) not() val { … }

// paren is the prefix parser for a ( token.
func (p *exprParser) paren() val { … }

// next advances the parser to the next token,
// leaving the token in p.t.
func (p *exprParser) next() { … }

func validtag(c byte) bool { … }