Function Unparse

parser/unparser.go:44–68

Unparse takes an input expression and source position information and generates a human-readable expression. Note, unparsing an AST will often generate the same expression as was originally parsed, but some formatting may be lost in translation, notably: - All quoted literals are doubled quoted. -

(expr ast.Expr, info *ast.SourceInfo, opts ...UnparserOption)

// This function optionally takes in one or more UnparserOption to alter the unparsing behavior, such as
// performing word wrapping on expressions.
func Unparse(expr ast.Expr, info *ast.SourceInfo, opts ...UnparserOption) (string, error) {
	unparserOpts := &unparserOption{
		wrapOnColumn:         defaultWrapOnColumn,
		wrapAfterColumnLimit: defaultWrapAfterColumnLimit,
		operatorsToWrapOn:    defaultOperatorsToWrapOn,
	}

	var err error
	for _, opt := range opts {
		unparserOpts, err = opt(unparserOpts)
		if err != nil {
			return "", err
		}
	}

	un := &unparser{
		info:    info,
		options: unparserOpts,
	}
	err = un.visit(expr)
	if err != nil {
		return "", err
	}
	return un.str.String(), nil
}

var identifierPartPattern *regexp.Regexp = regexp.MustCompile(`^[A-Za-z_][0-9A-Za-z_]*$`)