Errors specific to the parser package
const (
RightCurvedBracketError string = "Unexpected \")\" [%d]"
RightSquareBracketError string = "Unexpected \"]\" [%d]"
AtomTypeError string = "Bad Atom type"
UnspecifiedAtomError string = "Unspecified Atom error %#v: %#v"
)
func NodeName(nodeType NodeType) string
NodeName returns the name of the node for a given node value
CallNode object
type CallNode struct {
// Pos
NodeType
Callee Node
Args []Node
}
func (node *CallNode) Copy() Node
Copy creates a copy of a call node
func (node *CallNode) String() string
String returns the string value for a call node
IdentNode defines the identity node for use in identity operations
type IdentNode struct {
// Pos
NodeType
Ident string
}
func NewIdentNode(name string) *IdentNode
NewIdentNode creates a new identity node
func (node *IdentNode) Copy() Node
Copy creates a copy of an IdentNode instance
func (node *IdentNode) String() string
String returns a string represnetation of IdentNode
Node holds data for parsed AST nodes
type Node interface {
Type() NodeType
// Position() Pos
String() string
Copy() Node
}
func Parse(l *lexer.Lexer) []Node
Parse takes lexed data and returns a tree of parsed nodes. This function is
a convenience wrapper around ParseAtoms.
func ParseAtom(l *lexer.Lexer, item lexer.Atom, lookingFor rune) (Node, error)
ParseAtom takes a given lexed item, determines its type, and then create a
corresponding and appropriate node for that atom.
func ParseAtoms(l *lexer.Lexer, tree []Node, lookingFor rune) []Node
ParseAtoms iterates over the items in the given lexed data and adds parsed
nodes to the given tree.
func ParseFromString(name, program string) []Node
ParseFromString parses code and returns a collection of nodes.
NodeType defines a dedicated type for node types
type NodeType int
Constants for the parser package
const (
NodeIdent NodeType = iota
NodeString
NodeNumber
NodeCall
NodeVector
)
func (t NodeType) Type() NodeType
Type is a convenience method for getting the NodeType
NumberNode object
type NumberNode struct {
// Pos
NodeType
Value string
NumberType token.Token
}
func (node *NumberNode) Copy() Node
Copy creates a copy of a number node
func (node *NumberNode) String() string
String returns the string value for a number node
Pos type
type Pos int
func (p Pos) Position() Pos
Position returns a pos type
StringNode object
type StringNode struct {
// Pos
NodeType
Value string
}
func (node *StringNode) Copy() Node
Copy creates a copy of a string node
func (node *StringNode) String() string
String returns the string represnetation of a string node
VectorNode object
type VectorNode struct {
// Pos
NodeType
Nodes []Node
}
func (node *VectorNode) Copy() Node
Copy creates a copy of a vector node
func (node *VectorNode) String() string
String returns the string value of a vector node