Update to tengo v2 (#976)

1 files changed, 0 insertions, 159 deletions

diff --git a/vendor/github.com/d5/tengo/compiler/symbol_table.go b/vendor/github.com/d5/tengo/compiler/symbol_table.go
deleted file mode 100644
index 94c868de..00000000
--- a/vendor/github.com/d5/tengo/compiler/symbol_table.go
+++ /dev/null
@@ -1,159 +0,0 @@
-package compiler
-
-// SymbolTable represents a symbol table.
-type SymbolTable struct {
-	parent         *SymbolTable
-	block          bool
-	store          map[string]*Symbol
-	numDefinition  int
-	maxDefinition  int
-	freeSymbols    []*Symbol
-	builtinSymbols []*Symbol
-}
-
-// NewSymbolTable creates a SymbolTable.
-func NewSymbolTable() *SymbolTable {
-	return &SymbolTable{
-		store: make(map[string]*Symbol),
-	}
-}
-
-// Define adds a new symbol in the current scope.
-func (t *SymbolTable) Define(name string) *Symbol {
-	symbol := &Symbol{Name: name, Index: t.nextIndex()}
-	t.numDefinition++
-
-	if t.Parent(true) == nil {
-		symbol.Scope = ScopeGlobal
-	} else {
-		symbol.Scope = ScopeLocal
-	}
-
-	t.store[name] = symbol
-
-	t.updateMaxDefs(symbol.Index + 1)
-
-	return symbol
-}
-
-// DefineBuiltin adds a symbol for builtin function.
-func (t *SymbolTable) DefineBuiltin(index int, name string) *Symbol {
-	if t.parent != nil {
-		return t.parent.DefineBuiltin(index, name)
-	}
-
-	symbol := &Symbol{
-		Name:  name,
-		Index: index,
-		Scope: ScopeBuiltin,
-	}
-
-	t.store[name] = symbol
-
-	t.builtinSymbols = append(t.builtinSymbols, symbol)
-
-	return symbol
-}
-
-// Resolve resolves a symbol with a given name.
-func (t *SymbolTable) Resolve(name string) (symbol *Symbol, depth int, ok bool) {
-	symbol, ok = t.store[name]
-	if !ok && t.parent != nil {
-		symbol, depth, ok = t.parent.Resolve(name)
-		if !ok {
-			return
-		}
-
-		depth++
-
-		// if symbol is defined in parent table and if it's not global/builtin
-		// then it's free variable.
-		if !t.block && depth > 0 && symbol.Scope != ScopeGlobal && symbol.Scope != ScopeBuiltin {
-			return t.defineFree(symbol), depth, true
-		}
-
-		return
-	}
-
-	return
-}
-
-// Fork creates a new symbol table for a new scope.
-func (t *SymbolTable) Fork(block bool) *SymbolTable {
-	return &SymbolTable{
-		store:  make(map[string]*Symbol),
-		parent: t,
-		block:  block,
-	}
-}
-
-// Parent returns the outer scope of the current symbol table.
-func (t *SymbolTable) Parent(skipBlock bool) *SymbolTable {
-	if skipBlock && t.block {
-		return t.parent.Parent(skipBlock)
-	}
-
-	return t.parent
-}
-
-// MaxSymbols returns the total number of symbols defined in the scope.
-func (t *SymbolTable) MaxSymbols() int {
-	return t.maxDefinition
-}
-
-// FreeSymbols returns free symbols for the scope.
-func (t *SymbolTable) FreeSymbols() []*Symbol {
-	return t.freeSymbols
-}
-
-// BuiltinSymbols returns builtin symbols for the scope.
-func (t *SymbolTable) BuiltinSymbols() []*Symbol {
-	if t.parent != nil {
-		return t.parent.BuiltinSymbols()
-	}
-
-	return t.builtinSymbols
-}
-
-// Names returns the name of all the symbols.
-func (t *SymbolTable) Names() []string {
-	var names []string
-	for name := range t.store {
-		names = append(names, name)
-	}
-	return names
-}
-
-func (t *SymbolTable) nextIndex() int {
-	if t.block {
-		return t.parent.nextIndex() + t.numDefinition
-	}
-
-	return t.numDefinition
-}
-
-func (t *SymbolTable) updateMaxDefs(numDefs int) {
-	if numDefs > t.maxDefinition {
-		t.maxDefinition = numDefs
-	}
-
-	if t.block {
-		t.parent.updateMaxDefs(numDefs)
-	}
-}
-
-func (t *SymbolTable) defineFree(original *Symbol) *Symbol {
-	// TODO: should we check duplicates?
-
-	t.freeSymbols = append(t.freeSymbols, original)
-
-	symbol := &Symbol{
-		Name:  original.Name,
-		Index: len(t.freeSymbols) - 1,
-		Scope: ScopeFree,
-	}
-
-	t.store[original.Name] = symbol
-
-	return symbol
-}