PHP 8 Update - nullsafe operator (?->) - Remove (real) cast - Named arguments - Remove (unset) cast - Remove {} access - match expression - Union types in type hints and static typehint - Block catch without variable - Trailing comma in parameter lists - throw can be used as an expression - Concatenation precedence - Declaring properties in the constructor - Attributes - Names in the namespace are treated as a single token - Trailing comma in closure use list - Check that ::class on object works - Deferencable changes and arbitrary expressions in new/instanceof
406 lines
9.4 KiB
Go
406 lines
9.4 KiB
Go
// Package visitor contains walker.visitor implementations
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package nsresolver
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import (
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"errors"
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"strings"
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"github.com/z7zmey/php-parser/pkg/ast"
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"github.com/z7zmey/php-parser/pkg/visitor"
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)
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// NamespaceResolver visitor
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type NamespaceResolver struct {
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visitor.Null
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Namespace *Namespace
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ResolvedNames map[ast.Vertex]string
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goDeep bool
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}
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// NewNamespaceResolver NamespaceResolver type constructor
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func NewNamespaceResolver() *NamespaceResolver {
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return &NamespaceResolver{
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Namespace: NewNamespace(""),
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ResolvedNames: map[ast.Vertex]string{},
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goDeep: true,
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}
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}
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func (nsr *NamespaceResolver) EnterNode(n ast.Vertex) bool {
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n.Accept(nsr)
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if !nsr.goDeep {
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nsr.goDeep = true
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return false
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}
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return true
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}
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func (nsr *NamespaceResolver) StmtNamespace(n *ast.StmtNamespace) {
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if n.Name == nil {
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nsr.Namespace = NewNamespace("")
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} else {
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NSParts := n.Name.(*ast.Name).Parts
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nsr.Namespace = NewNamespace(concatNameParts(NSParts))
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}
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}
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func (nsr *NamespaceResolver) StmtUse(n *ast.StmtUseList) {
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useType := ""
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if n.Type != nil {
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useType = string(n.Type.(*ast.Identifier).Value)
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}
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for _, nn := range n.Uses {
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nsr.AddAlias(useType, nn, nil)
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}
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nsr.goDeep = false
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}
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func (nsr *NamespaceResolver) StmtGroupUse(n *ast.StmtGroupUseList) {
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useType := ""
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if n.Type != nil {
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useType = string(n.Type.(*ast.Identifier).Value)
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}
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for _, nn := range n.Uses {
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nsr.AddAlias(useType, nn, n.Prefix.(*ast.Name).Parts)
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}
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nsr.goDeep = false
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}
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func (nsr *NamespaceResolver) StmtClass(n *ast.StmtClass) {
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if n.Extends != nil {
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nsr.ResolveName(n.Extends, "")
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}
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if n.Implements != nil {
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for _, interfaceName := range n.Implements {
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nsr.ResolveName(interfaceName, "")
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}
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}
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if n.Name != nil {
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nsr.AddNamespacedName(n, string(n.Name.(*ast.Identifier).Value))
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}
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}
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func (nsr *NamespaceResolver) StmtInterface(n *ast.StmtInterface) {
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if n.Extends != nil {
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for _, interfaceName := range n.Extends {
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nsr.ResolveName(interfaceName, "")
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}
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}
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nsr.AddNamespacedName(n, string(n.Name.(*ast.Identifier).Value))
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}
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func (nsr *NamespaceResolver) StmtTrait(n *ast.StmtTrait) {
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nsr.AddNamespacedName(n, string(n.Name.(*ast.Identifier).Value))
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}
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func (nsr *NamespaceResolver) StmtFunction(n *ast.StmtFunction) {
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nsr.AddNamespacedName(n, string(n.Name.(*ast.Identifier).Value))
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for _, parameter := range n.Params {
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nsr.ResolveType(parameter.(*ast.Parameter).Type)
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}
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if n.ReturnType != nil {
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nsr.ResolveType(n.ReturnType)
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}
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}
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func (nsr *NamespaceResolver) StmtClassMethod(n *ast.StmtClassMethod) {
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for _, parameter := range n.Params {
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nsr.ResolveType(parameter.(*ast.Parameter).Type)
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}
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if n.ReturnType != nil {
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nsr.ResolveType(n.ReturnType)
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}
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}
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func (nsr *NamespaceResolver) ExprClosure(n *ast.ExprClosure) {
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for _, parameter := range n.Params {
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nsr.ResolveType(parameter.(*ast.Parameter).Type)
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}
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if n.ReturnType != nil {
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nsr.ResolveType(n.ReturnType)
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}
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}
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func (nsr *NamespaceResolver) StmtPropertyList(n *ast.StmtPropertyList) {
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if n.Type != nil {
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nsr.ResolveType(n.Type)
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}
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}
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func (nsr *NamespaceResolver) StmtConstList(n *ast.StmtConstList) {
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for _, constant := range n.Consts {
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nsr.AddNamespacedName(constant, string(constant.(*ast.StmtConstant).Name.(*ast.Identifier).Value))
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}
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}
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func (nsr *NamespaceResolver) ExprStaticCall(n *ast.ExprStaticCall) {
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nsr.ResolveName(n.Class, "")
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}
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func (nsr *NamespaceResolver) ExprStaticPropertyFetch(n *ast.ExprStaticPropertyFetch) {
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nsr.ResolveName(n.Class, "")
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}
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func (nsr *NamespaceResolver) ExprClassConstFetch(n *ast.ExprClassConstFetch) {
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nsr.ResolveName(n.Class, "")
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}
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func (nsr *NamespaceResolver) ExprNew(n *ast.ExprNew) {
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nsr.ResolveName(n.Class, "")
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}
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func (nsr *NamespaceResolver) ExprInstanceOf(n *ast.ExprInstanceOf) {
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nsr.ResolveName(n.Class, "")
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}
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func (nsr *NamespaceResolver) StmtCatch(n *ast.StmtCatch) {
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for _, t := range n.Types {
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nsr.ResolveName(t, "")
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}
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}
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func (nsr *NamespaceResolver) ExprFunctionCall(n *ast.ExprFunctionCall) {
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nsr.ResolveName(n.Function, "function")
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}
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func (nsr *NamespaceResolver) ExprConstFetch(n *ast.ExprConstFetch) {
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nsr.ResolveName(n.Const, "const")
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}
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func (nsr *NamespaceResolver) StmtTraitUse(n *ast.StmtTraitUse) {
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for _, t := range n.Traits {
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nsr.ResolveName(t, "")
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}
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for _, a := range n.Adaptations {
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switch aa := a.(type) {
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case *ast.StmtTraitUsePrecedence:
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refTrait := aa.Trait
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if refTrait != nil {
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nsr.ResolveName(refTrait, "")
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}
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for _, insteadOf := range aa.Insteadof {
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nsr.ResolveName(insteadOf, "")
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}
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case *ast.StmtTraitUseAlias:
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refTrait := aa.Trait
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if refTrait != nil {
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nsr.ResolveName(refTrait, "")
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}
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}
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}
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}
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// LeaveNode is invoked after node process
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func (nsr *NamespaceResolver) LeaveNode(n ast.Vertex) {
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switch nn := n.(type) {
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case *ast.StmtNamespace:
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if nn.Stmts != nil {
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nsr.Namespace = NewNamespace("")
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}
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}
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}
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// AddAlias adds a new alias
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func (nsr *NamespaceResolver) AddAlias(useType string, nn ast.Vertex, prefix []ast.Vertex) {
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switch use := nn.(type) {
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case *ast.StmtUse:
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if use.Type != nil {
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useType = string(use.Type.(*ast.Identifier).Value)
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}
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useNameParts := use.Use.(*ast.Name).Parts
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var alias string
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if use.Alias == nil {
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alias = string(useNameParts[len(useNameParts)-1].(*ast.NamePart).Value)
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} else {
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alias = string(use.Alias.(*ast.Identifier).Value)
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}
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nsr.Namespace.AddAlias(useType, concatNameParts(prefix, useNameParts), alias)
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}
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}
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// AddNamespacedName adds namespaced name by node
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func (nsr *NamespaceResolver) AddNamespacedName(nn ast.Vertex, nodeName string) {
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if nsr.Namespace.Namespace == "" {
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nsr.ResolvedNames[nn] = nodeName
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} else {
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nsr.ResolvedNames[nn] = nsr.Namespace.Namespace + "\\" + nodeName
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}
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}
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// ResolveName adds a resolved fully qualified name by node
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func (nsr *NamespaceResolver) ResolveName(nameNode ast.Vertex, aliasType string) {
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resolved, err := nsr.Namespace.ResolveName(nameNode, aliasType)
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if err == nil {
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nsr.ResolvedNames[nameNode] = resolved
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}
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}
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// ResolveType adds a resolved fully qualified type name
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func (nsr *NamespaceResolver) ResolveType(n ast.Vertex) {
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switch nn := n.(type) {
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case *ast.Nullable:
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nsr.ResolveType(nn.Expr)
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case *ast.Name:
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nsr.ResolveName(n, "")
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case *ast.NameRelative:
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nsr.ResolveName(n, "")
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case *ast.NameFullyQualified:
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nsr.ResolveName(n, "")
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}
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}
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// Namespace context
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type Namespace struct {
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Namespace string
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Aliases map[string]map[string]string
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}
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// NewNamespace constructor
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func NewNamespace(NSName string) *Namespace {
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return &Namespace{
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Namespace: NSName,
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Aliases: map[string]map[string]string{
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"": {},
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"const": {},
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"function": {},
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},
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}
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}
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// AddAlias adds a new alias
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func (ns *Namespace) AddAlias(aliasType string, aliasName string, alias string) {
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aliasType = strings.ToLower(aliasType)
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if aliasType == "const" {
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ns.Aliases[aliasType][alias] = aliasName
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} else {
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ns.Aliases[aliasType][strings.ToLower(alias)] = aliasName
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}
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}
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// ResolveName returns a resolved fully qualified name
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func (ns *Namespace) ResolveName(nameNode ast.Vertex, aliasType string) (string, error) {
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switch n := nameNode.(type) {
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case *ast.NameFullyQualified:
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// Fully qualifid name is already resolved
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return concatNameParts(n.Parts), nil
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case *ast.NameRelative:
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if ns.Namespace == "" {
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return concatNameParts(n.Parts), nil
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}
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return ns.Namespace + "\\" + concatNameParts(n.Parts), nil
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case *ast.Name:
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if aliasType == "const" && len(n.Parts) == 1 {
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part := strings.ToLower(string(n.Parts[0].(*ast.NamePart).Value))
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if part == "true" || part == "false" || part == "null" {
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return part, nil
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}
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}
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if aliasType == "" && len(n.Parts) == 1 {
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part := strings.ToLower(string(n.Parts[0].(*ast.NamePart).Value))
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switch part {
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case "self":
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fallthrough
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case "static":
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fallthrough
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case "parent":
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fallthrough
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case "int":
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fallthrough
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case "float":
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fallthrough
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case "bool":
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fallthrough
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case "string":
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fallthrough
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case "void":
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fallthrough
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case "iterable":
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fallthrough
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case "object":
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return part, nil
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}
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}
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aliasName, err := ns.ResolveAlias(nameNode, aliasType)
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if err != nil {
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// resolve as relative name if alias not found
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if ns.Namespace == "" {
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return concatNameParts(n.Parts), nil
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}
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return ns.Namespace + "\\" + concatNameParts(n.Parts), nil
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}
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if len(n.Parts) > 1 {
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// if name qualified, replace first part by alias
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return aliasName + "\\" + concatNameParts(n.Parts[1:]), nil
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}
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return aliasName, nil
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}
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return "", errors.New("must be instance of name.Names")
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}
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// ResolveAlias returns alias or error if not found
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func (ns *Namespace) ResolveAlias(nameNode ast.Vertex, aliasType string) (string, error) {
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aliasType = strings.ToLower(aliasType)
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nameParts := nameNode.(*ast.Name).Parts
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firstPartStr := string(nameParts[0].(*ast.NamePart).Value)
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if len(nameParts) > 1 { // resolve aliases for qualified names, always against class alias type
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firstPartStr = strings.ToLower(firstPartStr)
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aliasType = ""
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} else {
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if aliasType != "const" { // constants are case-sensitive
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firstPartStr = strings.ToLower(firstPartStr)
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}
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}
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aliasName, ok := ns.Aliases[aliasType][firstPartStr]
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if !ok {
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return "", errors.New("Not found")
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}
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return aliasName, nil
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}
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func concatNameParts(parts ...[]ast.Vertex) string {
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str := ""
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for _, p := range parts {
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for _, n := range p {
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if str == "" {
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str = string(n.(*ast.NamePart).Value)
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} else {
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str = str + "\\" + string(n.(*ast.NamePart).Value)
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}
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}
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}
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return str
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}
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