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ast->dag #58

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250 changes: 250 additions & 0 deletions pkg/ast/ast.go
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Original file line number Diff line number Diff line change
Expand Up @@ -10,12 +10,20 @@ import (
"fmt"
"sort"
"strings"
"sync"

"github.com/GuanceCloud/platypus/pkg/token"
)

type NodeType uint

var (
dagCache = struct {
sync.RWMutex
m map[string]*DAGNode
}{m: make(map[string]*DAGNode)}
)

const (
// expr.
TypeInvalid NodeType = iota
Expand Down Expand Up @@ -146,6 +154,7 @@ type Node struct {
// node type
NodeType NodeType
elem AstNode
DagNode *DAGNode
}

func (n *Node) String() string {
Expand Down Expand Up @@ -233,107 +242,296 @@ func (n *Node) StartPos() token.LnColPos {
}

func WrapIdentifier(node *Identifier) *Node {
fingerprint := fmt.Sprintf("id %s", node.Name)
if cached, exists := getCachedNode(fingerprint); exists {
return &Node{
NodeType: TypeIdentifier,
elem: node,
DagNode: cached,
}
}
dagNode := NewDAGNode(node.Name, node)
cacheNode(fingerprint, dagNode)
return &Node{
NodeType: TypeIdentifier,
elem: node,
DagNode: dagNode,
}
}

func WrapStringLiteral(node *StringLiteral) *Node {
fingerprint := fmt.Sprintf("str %s", node.Val)
if cached, exists := getCachedNode(fingerprint); exists {
return &Node{
NodeType: TypeStringLiteral,
elem: node,
DagNode: cached,
}
}
dagNode := NewDAGNode(node.Val, node)
cacheNode(fingerprint, dagNode)
return &Node{
NodeType: TypeStringLiteral,
elem: node,
DagNode: dagNode,
}
}

func WrapIntegerLiteral(node *IntegerLiteral) *Node {
fingerprint := fmt.Sprintf("int %d", node.Val)
if cached, exists := getCachedNode(fingerprint); exists {
return &Node{
NodeType: TypeIntegerLiteral,
elem: node,
DagNode: cached,
}
}
dagNode := NewDAGNode(node.String(), node)
cacheNode(fingerprint, dagNode)
return &Node{
NodeType: TypeIntegerLiteral,
elem: node,
DagNode: dagNode,
}
}

func WrapFloatLiteral(node *FloatLiteral) *Node {
fingerprint := fmt.Sprintf("float %f", node.Val)
if cached, exists := getCachedNode(fingerprint); exists {
return &Node{
NodeType: TypeFloatLiteral,
elem: node,
DagNode: cached,
}
}
dagNode := NewDAGNode(node.String(), node)
cacheNode(fingerprint, dagNode)
return &Node{
NodeType: TypeFloatLiteral,
elem: node,
DagNode: dagNode,
}
}

func WrapBoolLiteral(node *BoolLiteral) *Node {
fingerprint := fmt.Sprintf("bool %t", node.Val)
if cached, exists := getCachedNode(fingerprint); exists {
return &Node{
NodeType: TypeBoolLiteral,
elem: node,
DagNode: cached,
}
}
dagNode := NewDAGNode(node.String(), node)
cacheNode(fingerprint, dagNode)
return &Node{
NodeType: TypeBoolLiteral,
elem: node,
DagNode: dagNode,
}
}

func WrapNilLiteral(node *NilLiteral) *Node {
fingerprint := "nil"
if cached, exists := getCachedNode(fingerprint); exists {
return &Node{
NodeType: TypeNilLiteral,
elem: node,
DagNode: cached,
}
}
dagNode := NewDAGNode("nil", node)
return &Node{
NodeType: TypeNilLiteral,
elem: node,
DagNode: dagNode,
}
}

func WrapListInitExpr(node *ListLiteral) *Node {
fingerprint := fmt.Sprintf("list %s", node.String())
if cached, exists := getCachedNode(fingerprint); exists {
return &Node{
NodeType: TypeListLiteral,
elem: node,
DagNode: cached,
}
}
dagNode := NewDAGNode(node.String(), node)
cacheNode(fingerprint, dagNode)
return &Node{
NodeType: TypeListLiteral,
elem: node,
DagNode: dagNode,
}
}

func WrapMapLiteral(node *MapLiteral) *Node {
fingerprint := fmt.Sprintf("map %s", node.String())
if cached, exists := getCachedNode(fingerprint); exists {
return &Node{
NodeType: TypeMapLiteral,
elem: node,
DagNode: cached,
}
}
dagNode := NewDAGNode(node.String(), node)
cacheNode(fingerprint, dagNode)
return &Node{
NodeType: TypeMapLiteral,
elem: node,
DagNode: dagNode,
}
}

func WrapParenExpr(node *ParenExpr) *Node {
fingerprint := fmt.Sprintf("paren %s", node.String())
if cached, exists := getCachedNode(fingerprint); exists {
return &Node{
NodeType: TypeParenExpr,
elem: node,
DagNode: cached,
}
}
dagNode := NewDAGNode(node.String(), node)
cacheNode(fingerprint, dagNode)
return &Node{
NodeType: TypeParenExpr,
elem: node,
DagNode: dagNode,
}
}

func WrapAttrExpr(node *AttrExpr) *Node {
fingerprint := fmt.Sprintf("attr %s", node.String())
if cached, exists := getCachedNode(fingerprint); exists {
return &Node{
NodeType: TypeAttrExpr,
elem: node,
DagNode: cached,
}
}
dagNode := NewDAGNode(node.String(), node)
cacheNode(fingerprint, dagNode)
return &Node{
NodeType: TypeAttrExpr,
elem: node,
DagNode: dagNode,
}
}

func WrapIndexExpr(node *IndexExpr) *Node {
fingerprint := fmt.Sprintf("index %s", node.String())
if cached, exists := getCachedNode(fingerprint); exists {
return &Node{
NodeType: TypeIndexExpr,
elem: node,
DagNode: cached,
}
}
dagNode := NewDAGNode(fingerprint, node)
cacheNode(fingerprint, dagNode)
return &Node{
NodeType: TypeIndexExpr,
elem: node,
DagNode: dagNode,
}
}

func WrapArithmeticExpr(node *ArithmeticExpr) *Node {
lhsHash := node.LHS.Hash()
rhsHash := node.RHS.Hash()
fingerprint := fmt.Sprintf("%s %s %s", lhsHash, node.Op, rhsHash)
if cached, exists := getCachedNode(fingerprint); exists {
return &Node{
NodeType: TypeArithmeticExpr,
elem: node,
DagNode: cached,
}
}
dagNode := NewDAGNode(fingerprint, node)
if node.LHS.DagNode != nil {
dagNode.AddChild(node.LHS.DagNode)
}
if node.RHS.DagNode != nil {
dagNode.AddChild(node.RHS.DagNode)
}
cacheNode(fingerprint, dagNode)
return &Node{
NodeType: TypeArithmeticExpr,
elem: node,
DagNode: dagNode,
}
}

func WrapConditionExpr(node *ConditionalExpr) *Node {
lhsHash := node.LHS.Hash()
rhsHash := node.RHS.Hash()
fingerprint := fmt.Sprintf("%s %s %s", lhsHash, node.Op, rhsHash)
if cached, exists := getCachedNode(fingerprint); exists {
return &Node{
NodeType: TypeConditionalExpr,
elem: node,
DagNode: cached,
}
}
dagNode := NewDAGNode(fingerprint, node)
if node.LHS.DagNode != nil {
dagNode.AddChild(node.LHS.DagNode)
}
if node.RHS.DagNode != nil {
dagNode.AddChild(node.RHS.DagNode)
}
cacheNode(fingerprint, dagNode)
return &Node{
NodeType: TypeConditionalExpr,
elem: node,
DagNode: dagNode,
}
}

func WrapInExpr(node *InExpr) *Node {
lhsHash := node.LHS.Hash()
rhsHash := node.RHS.Hash()
fingerprint := fmt.Sprintf("%s %s %s", lhsHash, node.Op, rhsHash)
if cached, exists := getCachedNode(fingerprint); exists {
return &Node{
NodeType: TypeInExpr,
elem: node,
DagNode: cached,
}
}
dagNode := NewDAGNode(fingerprint, node)
if node.LHS.DagNode != nil {
dagNode.AddChild(node.LHS.DagNode)
}
if node.RHS.DagNode != nil {
dagNode.AddChild(node.RHS.DagNode)
}
cacheNode(fingerprint, dagNode)
return &Node{
NodeType: TypeInExpr,
elem: node,
DagNode: dagNode,
}
}

func WrapUnaryExpr(node *UnaryExpr) *Node {
rhsHash := node.RHS.Hash()
fingerprint := fmt.Sprintf("%s %s", node.Op, rhsHash)
if cached, exists := getCachedNode(fingerprint); exists {
return &Node{
NodeType: TypeUnaryExpr,
elem: node,
DagNode: cached,
}
}
dagNode := NewDAGNode(node.String(), node)

return &Node{
NodeType: TypeUnaryExpr,
elem: node,
DagNode: dagNode,
}
}

Expand Down Expand Up @@ -468,3 +666,55 @@ func NodeStartPos(node *Node) token.LnColPos {
}
return token.InvalidLnColPos
}

func getCachedNode(fingerprint string) (*DAGNode, bool) {
dagCache.RLock()
defer dagCache.RUnlock()
node, exists := dagCache.m[fingerprint]
return node, exists
}

func cacheNode(fingerprint string, node *DAGNode) {
dagCache.Lock()
defer dagCache.Unlock()
dagCache.m[fingerprint] = node
}

func (n *Node) Hash() string {
if n.DagNode != nil {
return n.DagNode.ID
}
switch n.NodeType {
case TypeIdentifier:
return n.Identifier().Name
case TypeStringLiteral:
return n.StringLiteral().Val
case TypeIntegerLiteral:
return n.IntegerLiteral().String()
case TypeFloatLiteral:
return n.FloatLiteral().String()
case TypeBoolLiteral:
return n.BoolLiteral().String()
case TypeNilLiteral:
return "nil"
case TypeListLiteral:
return n.ListLiteral().String()
case TypeMapLiteral:
return n.MapLiteral().String()
case TypeParenExpr:
return n.ParenExpr().String()
case TypeAttrExpr:
return n.AttrExpr().String()
case TypeIndexExpr:
return n.IndexExpr().String()
case TypeUnaryExpr:
return n.UnaryExpr().String()
case TypeArithmeticExpr:
return n.ArithmeticExpr().String()
case TypeConditionalExpr:
return n.ConditionalExpr().String()
case TypeAssignmentExpr:
return n.AssignmentExpr().String()
}
return ""
}
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