Update to tengo v2 (#976)

42 files changed, 0 insertions, 1210 deletions

diff --git a/vendor/github.com/d5/tengo/compiler/ast/array_lit.go b/vendor/github.com/d5/tengo/compiler/ast/array_lit.go
deleted file mode 100644
index 9fb4ed67..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/array_lit.go
+++ /dev/null
@@ -1,35 +0,0 @@
-package ast
-
-import (
-	"strings"
-
-	"github.com/d5/tengo/compiler/source"
-)
-
-// ArrayLit represents an array literal.
-type ArrayLit struct {
-	Elements []Expr
-	LBrack   source.Pos
-	RBrack   source.Pos
-}
-
-func (e *ArrayLit) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *ArrayLit) Pos() source.Pos {
-	return e.LBrack
-}
-
-// End returns the position of first character immediately after the node.
-func (e *ArrayLit) End() source.Pos {
-	return e.RBrack + 1
-}
-
-func (e *ArrayLit) String() string {
-	var elements []string
-	for _, m := range e.Elements {
-		elements = append(elements, m.String())
-	}
-
-	return "[" + strings.Join(elements, ", ") + "]"
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/assign_stmt.go b/vendor/github.com/d5/tengo/compiler/ast/assign_stmt.go
deleted file mode 100644
index e129114e..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/assign_stmt.go
+++ /dev/null
@@ -1,40 +0,0 @@
-package ast
-
-import (
-	"strings"
-
-	"github.com/d5/tengo/compiler/source"
-	"github.com/d5/tengo/compiler/token"
-)
-
-// AssignStmt represents an assignment statement.
-type AssignStmt struct {
-	LHS      []Expr
-	RHS      []Expr
-	Token    token.Token
-	TokenPos source.Pos
-}
-
-func (s *AssignStmt) stmtNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (s *AssignStmt) Pos() source.Pos {
-	return s.LHS[0].Pos()
-}
-
-// End returns the position of first character immediately after the node.
-func (s *AssignStmt) End() source.Pos {
-	return s.RHS[len(s.RHS)-1].End()
-}
-
-func (s *AssignStmt) String() string {
-	var lhs, rhs []string
-	for _, e := range s.LHS {
-		lhs = append(lhs, e.String())
-	}
-	for _, e := range s.RHS {
-		rhs = append(rhs, e.String())
-	}
-
-	return strings.Join(lhs, ", ") + " " + s.Token.String() + " " + strings.Join(rhs, ", ")
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/ast.go b/vendor/github.com/d5/tengo/compiler/ast/ast.go
deleted file mode 100644
index 9fd06728..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/ast.go
+++ /dev/null
@@ -1,5 +0,0 @@
-package ast
-
-const (
-	nullRep = "<null>"
-)
diff --git a/vendor/github.com/d5/tengo/compiler/ast/bad_expr.go b/vendor/github.com/d5/tengo/compiler/ast/bad_expr.go
deleted file mode 100644
index 771f26fd..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/bad_expr.go
+++ /dev/null
@@ -1,25 +0,0 @@
-package ast
-
-import "github.com/d5/tengo/compiler/source"
-
-// BadExpr represents a bad expression.
-type BadExpr struct {
-	From source.Pos
-	To   source.Pos
-}
-
-func (e *BadExpr) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *BadExpr) Pos() source.Pos {
-	return e.From
-}
-
-// End returns the position of first character immediately after the node.
-func (e *BadExpr) End() source.Pos {
-	return e.To
-}
-
-func (e *BadExpr) String() string {
-	return "<bad expression>"
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/bad_stmt.go b/vendor/github.com/d5/tengo/compiler/ast/bad_stmt.go
deleted file mode 100644
index c2d0ae9a..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/bad_stmt.go
+++ /dev/null
@@ -1,25 +0,0 @@
-package ast
-
-import "github.com/d5/tengo/compiler/source"
-
-// BadStmt represents a bad statement.
-type BadStmt struct {
-	From source.Pos
-	To   source.Pos
-}
-
-func (s *BadStmt) stmtNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (s *BadStmt) Pos() source.Pos {
-	return s.From
-}
-
-// End returns the position of first character immediately after the node.
-func (s *BadStmt) End() source.Pos {
-	return s.To
-}
-
-func (s *BadStmt) String() string {
-	return "<bad statement>"
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/binary_expr.go b/vendor/github.com/d5/tengo/compiler/ast/binary_expr.go
deleted file mode 100644
index 0cc5bba8..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/binary_expr.go
+++ /dev/null
@@ -1,30 +0,0 @@
-package ast
-
-import (
-	"github.com/d5/tengo/compiler/source"
-	"github.com/d5/tengo/compiler/token"
-)
-
-// BinaryExpr represents a binary operator expression.
-type BinaryExpr struct {
-	LHS      Expr
-	RHS      Expr
-	Token    token.Token
-	TokenPos source.Pos
-}
-
-func (e *BinaryExpr) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *BinaryExpr) Pos() source.Pos {
-	return e.LHS.Pos()
-}
-
-// End returns the position of first character immediately after the node.
-func (e *BinaryExpr) End() source.Pos {
-	return e.RHS.End()
-}
-
-func (e *BinaryExpr) String() string {
-	return "(" + e.LHS.String() + " " + e.Token.String() + " " + e.RHS.String() + ")"
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/block_stmt.go b/vendor/github.com/d5/tengo/compiler/ast/block_stmt.go
deleted file mode 100644
index 9bde9fa3..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/block_stmt.go
+++ /dev/null
@@ -1,35 +0,0 @@
-package ast
-
-import (
-	"strings"
-
-	"github.com/d5/tengo/compiler/source"
-)
-
-// BlockStmt represents a block statement.
-type BlockStmt struct {
-	Stmts  []Stmt
-	LBrace source.Pos
-	RBrace source.Pos
-}
-
-func (s *BlockStmt) stmtNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (s *BlockStmt) Pos() source.Pos {
-	return s.LBrace
-}
-
-// End returns the position of first character immediately after the node.
-func (s *BlockStmt) End() source.Pos {
-	return s.RBrace + 1
-}
-
-func (s *BlockStmt) String() string {
-	var list []string
-	for _, e := range s.Stmts {
-		list = append(list, e.String())
-	}
-
-	return "{" + strings.Join(list, "; ") + "}"
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/bool_lit.go b/vendor/github.com/d5/tengo/compiler/ast/bool_lit.go
deleted file mode 100644
index e667a5c8..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/bool_lit.go
+++ /dev/null
@@ -1,26 +0,0 @@
-package ast
-
-import "github.com/d5/tengo/compiler/source"
-
-// BoolLit represents a boolean literal.
-type BoolLit struct {
-	Value    bool
-	ValuePos source.Pos
-	Literal  string
-}
-
-func (e *BoolLit) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *BoolLit) Pos() source.Pos {
-	return e.ValuePos
-}
-
-// End returns the position of first character immediately after the node.
-func (e *BoolLit) End() source.Pos {
-	return source.Pos(int(e.ValuePos) + len(e.Literal))
-}
-
-func (e *BoolLit) String() string {
-	return e.Literal
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/branch_stmt.go b/vendor/github.com/d5/tengo/compiler/ast/branch_stmt.go
deleted file mode 100644
index f6c7fdea..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/branch_stmt.go
+++ /dev/null
@@ -1,38 +0,0 @@
-package ast
-
-import (
-	"github.com/d5/tengo/compiler/source"
-	"github.com/d5/tengo/compiler/token"
-)
-
-// BranchStmt represents a branch statement.
-type BranchStmt struct {
-	Token    token.Token
-	TokenPos source.Pos
-	Label    *Ident
-}
-
-func (s *BranchStmt) stmtNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (s *BranchStmt) Pos() source.Pos {
-	return s.TokenPos
-}
-
-// End returns the position of first character immediately after the node.
-func (s *BranchStmt) End() source.Pos {
-	if s.Label != nil {
-		return s.Label.End()
-	}
-
-	return source.Pos(int(s.TokenPos) + len(s.Token.String()))
-}
-
-func (s *BranchStmt) String() string {
-	var label string
-	if s.Label != nil {
-		label = " " + s.Label.Name
-	}
-
-	return s.Token.String() + label
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/call_expr.go b/vendor/github.com/d5/tengo/compiler/ast/call_expr.go
deleted file mode 100644
index 0219d7c9..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/call_expr.go
+++ /dev/null
@@ -1,36 +0,0 @@
-package ast
-
-import (
-	"strings"
-
-	"github.com/d5/tengo/compiler/source"
-)
-
-// CallExpr represents a function call expression.
-type CallExpr struct {
-	Func   Expr
-	LParen source.Pos
-	Args   []Expr
-	RParen source.Pos
-}
-
-func (e *CallExpr) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *CallExpr) Pos() source.Pos {
-	return e.Func.Pos()
-}
-
-// End returns the position of first character immediately after the node.
-func (e *CallExpr) End() source.Pos {
-	return e.RParen + 1
-}
-
-func (e *CallExpr) String() string {
-	var args []string
-	for _, e := range e.Args {
-		args = append(args, e.String())
-	}
-
-	return e.Func.String() + "(" + strings.Join(args, ", ") + ")"
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/char_lit.go b/vendor/github.com/d5/tengo/compiler/ast/char_lit.go
deleted file mode 100644
index 592f8744..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/char_lit.go
+++ /dev/null
@@ -1,26 +0,0 @@
-package ast
-
-import "github.com/d5/tengo/compiler/source"
-
-// CharLit represents a character literal.
-type CharLit struct {
-	Value    rune
-	ValuePos source.Pos
-	Literal  string
-}
-
-func (e *CharLit) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *CharLit) Pos() source.Pos {
-	return e.ValuePos
-}
-
-// End returns the position of first character immediately after the node.
-func (e *CharLit) End() source.Pos {
-	return source.Pos(int(e.ValuePos) + len(e.Literal))
-}
-
-func (e *CharLit) String() string {
-	return e.Literal
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/cond_expr.go b/vendor/github.com/d5/tengo/compiler/ast/cond_expr.go
deleted file mode 100644
index bb1db849..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/cond_expr.go
+++ /dev/null
@@ -1,30 +0,0 @@
-package ast
-
-import (
-	"github.com/d5/tengo/compiler/source"
-)
-
-// CondExpr represents a ternary conditional expression.
-type CondExpr struct {
-	Cond        Expr
-	True        Expr
-	False       Expr
-	QuestionPos source.Pos
-	ColonPos    source.Pos
-}
-
-func (e *CondExpr) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *CondExpr) Pos() source.Pos {
-	return e.Cond.Pos()
-}
-
-// End returns the position of first character immediately after the node.
-func (e *CondExpr) End() source.Pos {
-	return e.False.End()
-}
-
-func (e *CondExpr) String() string {
-	return "(" + e.Cond.String() + " ? " + e.True.String() + " : " + e.False.String() + ")"
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/empty_stmt.go b/vendor/github.com/d5/tengo/compiler/ast/empty_stmt.go
deleted file mode 100644
index a2ac6ffe..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/empty_stmt.go
+++ /dev/null
@@ -1,29 +0,0 @@
-package ast
-
-import "github.com/d5/tengo/compiler/source"
-
-// EmptyStmt represents an empty statement.
-type EmptyStmt struct {
-	Semicolon source.Pos
-	Implicit  bool
-}
-
-func (s *EmptyStmt) stmtNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (s *EmptyStmt) Pos() source.Pos {
-	return s.Semicolon
-}
-
-// End returns the position of first character immediately after the node.
-func (s *EmptyStmt) End() source.Pos {
-	if s.Implicit {
-		return s.Semicolon
-	}
-
-	return s.Semicolon + 1
-}
-
-func (s *EmptyStmt) String() string {
-	return ";"
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/error_expr.go b/vendor/github.com/d5/tengo/compiler/ast/error_expr.go
deleted file mode 100644
index 7ce5667e..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/error_expr.go
+++ /dev/null
@@ -1,29 +0,0 @@
-package ast
-
-import (
-	"github.com/d5/tengo/compiler/source"
-)
-
-// ErrorExpr represents an error expression
-type ErrorExpr struct {
-	Expr     Expr
-	ErrorPos source.Pos
-	LParen   source.Pos
-	RParen   source.Pos
-}
-
-func (e *ErrorExpr) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *ErrorExpr) Pos() source.Pos {
-	return e.ErrorPos
-}
-
-// End returns the position of first character immediately after the node.
-func (e *ErrorExpr) End() source.Pos {
-	return e.RParen
-}
-
-func (e *ErrorExpr) String() string {
-	return "error(" + e.Expr.String() + ")"
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/export_stmt.go b/vendor/github.com/d5/tengo/compiler/ast/export_stmt.go
deleted file mode 100644
index 64eb7606..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/export_stmt.go
+++ /dev/null
@@ -1,27 +0,0 @@
-package ast
-
-import (
-	"github.com/d5/tengo/compiler/source"
-)
-
-// ExportStmt represents an export statement.
-type ExportStmt struct {
-	ExportPos source.Pos
-	Result    Expr
-}
-
-func (s *ExportStmt) stmtNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (s *ExportStmt) Pos() source.Pos {
-	return s.ExportPos
-}
-
-// End returns the position of first character immediately after the node.
-func (s *ExportStmt) End() source.Pos {
-	return s.Result.End()
-}
-
-func (s *ExportStmt) String() string {
-	return "export " + s.Result.String()
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/expr.go b/vendor/github.com/d5/tengo/compiler/ast/expr.go
deleted file mode 100644
index 764bacec..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/expr.go
+++ /dev/null
@@ -1,7 +0,0 @@
-package ast
-
-// Expr represents an expression node in the AST.
-type Expr interface {
-	Node
-	exprNode()
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/expr_stmt.go b/vendor/github.com/d5/tengo/compiler/ast/expr_stmt.go
deleted file mode 100644
index 095a3ad5..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/expr_stmt.go
+++ /dev/null
@@ -1,24 +0,0 @@
-package ast
-
-import "github.com/d5/tengo/compiler/source"
-
-// ExprStmt represents an expression statement.
-type ExprStmt struct {
-	Expr Expr
-}
-
-func (s *ExprStmt) stmtNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (s *ExprStmt) Pos() source.Pos {
-	return s.Expr.Pos()
-}
-
-// End returns the position of first character immediately after the node.
-func (s *ExprStmt) End() source.Pos {
-	return s.Expr.End()
-}
-
-func (s *ExprStmt) String() string {
-	return s.Expr.String()
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/file.go b/vendor/github.com/d5/tengo/compiler/ast/file.go
deleted file mode 100644
index fc18b2d7..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/file.go
+++ /dev/null
@@ -1,32 +0,0 @@
-package ast
-
-import (
-	"strings"
-
-	"github.com/d5/tengo/compiler/source"
-)
-
-// File represents a file unit.
-type File struct {
-	InputFile *source.File
-	Stmts     []Stmt
-}
-
-// Pos returns the position of first character belonging to the node.
-func (n *File) Pos() source.Pos {
-	return source.Pos(n.InputFile.Base)
-}
-
-// End returns the position of first character immediately after the node.
-func (n *File) End() source.Pos {
-	return source.Pos(n.InputFile.Base + n.InputFile.Size)
-}
-
-func (n *File) String() string {
-	var stmts []string
-	for _, e := range n.Stmts {
-		stmts = append(stmts, e.String())
-	}
-
-	return strings.Join(stmts, "; ")
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/float_lit.go b/vendor/github.com/d5/tengo/compiler/ast/float_lit.go
deleted file mode 100644
index 670f744b..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/float_lit.go
+++ /dev/null
@@ -1,26 +0,0 @@
-package ast
-
-import "github.com/d5/tengo/compiler/source"
-
-// FloatLit represents a floating point literal.
-type FloatLit struct {
-	Value    float64
-	ValuePos source.Pos
-	Literal  string
-}
-
-func (e *FloatLit) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *FloatLit) Pos() source.Pos {
-	return e.ValuePos
-}
-
-// End returns the position of first character immediately after the node.
-func (e *FloatLit) End() source.Pos {
-	return source.Pos(int(e.ValuePos) + len(e.Literal))
-}
-
-func (e *FloatLit) String() string {
-	return e.Literal
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/for_in_stmt.go b/vendor/github.com/d5/tengo/compiler/ast/for_in_stmt.go
deleted file mode 100644
index 18020b56..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/for_in_stmt.go
+++ /dev/null
@@ -1,32 +0,0 @@
-package ast
-
-import "github.com/d5/tengo/compiler/source"
-
-// ForInStmt represents a for-in statement.
-type ForInStmt struct {
-	ForPos   source.Pos
-	Key      *Ident
-	Value    *Ident
-	Iterable Expr
-	Body     *BlockStmt
-}
-
-func (s *ForInStmt) stmtNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (s *ForInStmt) Pos() source.Pos {
-	return s.ForPos
-}
-
-// End returns the position of first character immediately after the node.
-func (s *ForInStmt) End() source.Pos {
-	return s.Body.End()
-}
-
-func (s *ForInStmt) String() string {
-	if s.Value != nil {
-		return "for " + s.Key.String() + ", " + s.Value.String() + " in " + s.Iterable.String() + " " + s.Body.String()
-	}
-
-	return "for " + s.Key.String() + " in " + s.Iterable.String() + " " + s.Body.String()
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/for_stmt.go b/vendor/github.com/d5/tengo/compiler/ast/for_stmt.go
deleted file mode 100644
index 4b5a0a17..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/for_stmt.go
+++ /dev/null
@@ -1,43 +0,0 @@
-package ast
-
-import "github.com/d5/tengo/compiler/source"
-
-// ForStmt represents a for statement.
-type ForStmt struct {
-	ForPos source.Pos
-	Init   Stmt
-	Cond   Expr
-	Post   Stmt
-	Body   *BlockStmt
-}
-
-func (s *ForStmt) stmtNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (s *ForStmt) Pos() source.Pos {
-	return s.ForPos
-}
-
-// End returns the position of first character immediately after the node.
-func (s *ForStmt) End() source.Pos {
-	return s.Body.End()
-}
-
-func (s *ForStmt) String() string {
-	var init, cond, post string
-	if s.Init != nil {
-		init = s.Init.String()
-	}
-	if s.Cond != nil {
-		cond = s.Cond.String() + " "
-	}
-	if s.Post != nil {
-		post = s.Post.String()
-	}
-
-	if init != "" || post != "" {
-		return "for " + init + " ; " + cond + " ; " + post + s.Body.String()
-	}
-
-	return "for " + cond + s.Body.String()
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/func_lit.go b/vendor/github.com/d5/tengo/compiler/ast/func_lit.go
deleted file mode 100644
index 2e90ed2b..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/func_lit.go
+++ /dev/null
@@ -1,25 +0,0 @@
-package ast
-
-import "github.com/d5/tengo/compiler/source"
-
-// FuncLit represents a function literal.
-type FuncLit struct {
-	Type *FuncType
-	Body *BlockStmt
-}
-
-func (e *FuncLit) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *FuncLit) Pos() source.Pos {
-	return e.Type.Pos()
-}
-
-// End returns the position of first character immediately after the node.
-func (e *FuncLit) End() source.Pos {
-	return e.Body.End()
-}
-
-func (e *FuncLit) String() string {
-	return "func" + e.Type.Params.String() + " " + e.Body.String()
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/func_type.go b/vendor/github.com/d5/tengo/compiler/ast/func_type.go
deleted file mode 100644
index 2afaabb1..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/func_type.go
+++ /dev/null
@@ -1,25 +0,0 @@
-package ast
-
-import "github.com/d5/tengo/compiler/source"
-
-// FuncType represents a function type definition.
-type FuncType struct {
-	FuncPos source.Pos
-	Params  *IdentList
-}
-
-func (e *FuncType) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *FuncType) Pos() source.Pos {
-	return e.FuncPos
-}
-
-// End returns the position of first character immediately after the node.
-func (e *FuncType) End() source.Pos {
-	return e.Params.End()
-}
-
-func (e *FuncType) String() string {
-	return "func" + e.Params.String()
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/ident.go b/vendor/github.com/d5/tengo/compiler/ast/ident.go
deleted file mode 100644
index 33b7ff76..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/ident.go
+++ /dev/null
@@ -1,29 +0,0 @@
-package ast
-
-import "github.com/d5/tengo/compiler/source"
-
-// Ident represents an identifier.
-type Ident struct {
-	Name    string
-	NamePos source.Pos
-}
-
-func (e *Ident) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *Ident) Pos() source.Pos {
-	return e.NamePos
-}
-
-// End returns the position of first character immediately after the node.
-func (e *Ident) End() source.Pos {
-	return source.Pos(int(e.NamePos) + len(e.Name))
-}
-
-func (e *Ident) String() string {
-	if e != nil {
-		return e.Name
-	}
-
-	return nullRep
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/ident_list.go b/vendor/github.com/d5/tengo/compiler/ast/ident_list.go
deleted file mode 100644
index 8dd6d307..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/ident_list.go
+++ /dev/null
@@ -1,63 +0,0 @@
-package ast
-
-import (
-	"strings"
-
-	"github.com/d5/tengo/compiler/source"
-)
-
-// IdentList represents a list of identifiers.
-type IdentList struct {
-	LParen  source.Pos
-	VarArgs bool
-	List    []*Ident
-	RParen  source.Pos
-}
-
-// Pos returns the position of first character belonging to the node.
-func (n *IdentList) Pos() source.Pos {
-	if n.LParen.IsValid() {
-		return n.LParen
-	}
-
-	if len(n.List) > 0 {
-		return n.List[0].Pos()
-	}
-
-	return source.NoPos
-}
-
-// End returns the position of first character immediately after the node.
-func (n *IdentList) End() source.Pos {
-	if n.RParen.IsValid() {
-		return n.RParen + 1
-	}
-
-	if l := len(n.List); l > 0 {
-		return n.List[l-1].End()
-	}
-
-	return source.NoPos
-}
-
-// NumFields returns the number of fields.
-func (n *IdentList) NumFields() int {
-	if n == nil {
-		return 0
-	}
-
-	return len(n.List)
-}
-
-func (n *IdentList) String() string {
-	var list []string
-	for i, e := range n.List {
-		if n.VarArgs && i == len(n.List)-1 {
-			list = append(list, "..."+e.String())
-		} else {
-			list = append(list, e.String())
-		}
-	}
-
-	return "(" + strings.Join(list, ", ") + ")"
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/if_stmt.go b/vendor/github.com/d5/tengo/compiler/ast/if_stmt.go
deleted file mode 100644
index b3d65606..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/if_stmt.go
+++ /dev/null
@@ -1,40 +0,0 @@
-package ast
-
-import "github.com/d5/tengo/compiler/source"
-
-// IfStmt represents an if statement.
-type IfStmt struct {
-	IfPos source.Pos
-	Init  Stmt
-	Cond  Expr
-	Body  *BlockStmt
-	Else  Stmt // else branch; or nil
-}
-
-func (s *IfStmt) stmtNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (s *IfStmt) Pos() source.Pos {
-	return s.IfPos
-}
-
-// End returns the position of first character immediately after the node.
-func (s *IfStmt) End() source.Pos {
-	if s.Else != nil {
-		return s.Else.End()
-	}
-
-	return s.Body.End()
-}
-
-func (s *IfStmt) String() string {
-	var initStmt, elseStmt string
-	if s.Init != nil {
-		initStmt = s.Init.String() + "; "
-	}
-	if s.Else != nil {
-		elseStmt = " else " + s.Else.String()
-	}
-
-	return "if " + initStmt + s.Cond.String() + " " + s.Body.String() + elseStmt
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/immutable_expr.go b/vendor/github.com/d5/tengo/compiler/ast/immutable_expr.go
deleted file mode 100644
index f9843b50..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/immutable_expr.go
+++ /dev/null
@@ -1,29 +0,0 @@
-package ast
-
-import (
-	"github.com/d5/tengo/compiler/source"
-)
-
-// ImmutableExpr represents an immutable expression
-type ImmutableExpr struct {
-	Expr     Expr
-	ErrorPos source.Pos
-	LParen   source.Pos
-	RParen   source.Pos
-}
-
-func (e *ImmutableExpr) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *ImmutableExpr) Pos() source.Pos {
-	return e.ErrorPos
-}
-
-// End returns the position of first character immediately after the node.
-func (e *ImmutableExpr) End() source.Pos {
-	return e.RParen
-}
-
-func (e *ImmutableExpr) String() string {
-	return "immutable(" + e.Expr.String() + ")"
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/import_expr.go b/vendor/github.com/d5/tengo/compiler/ast/import_expr.go
deleted file mode 100644
index 6eff74a9..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/import_expr.go
+++ /dev/null
@@ -1,29 +0,0 @@
-package ast
-
-import (
-	"github.com/d5/tengo/compiler/source"
-	"github.com/d5/tengo/compiler/token"
-)
-
-// ImportExpr represents an import expression
-type ImportExpr struct {
-	ModuleName string
-	Token      token.Token
-	TokenPos   source.Pos
-}
-
-func (e *ImportExpr) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *ImportExpr) Pos() source.Pos {
-	return e.TokenPos
-}
-
-// End returns the position of first character immediately after the node.
-func (e *ImportExpr) End() source.Pos {
-	return source.Pos(int(e.TokenPos) + 10 + len(e.ModuleName)) // import("moduleName")
-}
-
-func (e *ImportExpr) String() string {
-	return `import("` + e.ModuleName + `")"`
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/inc_dec_stmt.go b/vendor/github.com/d5/tengo/compiler/ast/inc_dec_stmt.go
deleted file mode 100644
index e4e7f92c..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/inc_dec_stmt.go
+++ /dev/null
@@ -1,29 +0,0 @@
-package ast
-
-import (
-	"github.com/d5/tengo/compiler/source"
-	"github.com/d5/tengo/compiler/token"
-)
-
-// IncDecStmt represents increment or decrement statement.
-type IncDecStmt struct {
-	Expr     Expr
-	Token    token.Token
-	TokenPos source.Pos
-}
-
-func (s *IncDecStmt) stmtNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (s *IncDecStmt) Pos() source.Pos {
-	return s.Expr.Pos()
-}
-
-// End returns the position of first character immediately after the node.
-func (s *IncDecStmt) End() source.Pos {
-	return source.Pos(int(s.TokenPos) + 2)
-}
-
-func (s *IncDecStmt) String() string {
-	return s.Expr.String() + s.Token.String()
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/index_expr.go b/vendor/github.com/d5/tengo/compiler/ast/index_expr.go
deleted file mode 100644
index bc0992a3..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/index_expr.go
+++ /dev/null
@@ -1,32 +0,0 @@
-package ast
-
-import "github.com/d5/tengo/compiler/source"
-
-// IndexExpr represents an index expression.
-type IndexExpr struct {
-	Expr   Expr
-	LBrack source.Pos
-	Index  Expr
-	RBrack source.Pos
-}
-
-func (e *IndexExpr) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *IndexExpr) Pos() source.Pos {
-	return e.Expr.Pos()
-}
-
-// End returns the position of first character immediately after the node.
-func (e *IndexExpr) End() source.Pos {
-	return e.RBrack + 1
-}
-
-func (e *IndexExpr) String() string {
-	var index string
-	if e.Index != nil {
-		index = e.Index.String()
-	}
-
-	return e.Expr.String() + "[" + index + "]"
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/int_lit.go b/vendor/github.com/d5/tengo/compiler/ast/int_lit.go
deleted file mode 100644
index 3e1fd98b..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/int_lit.go
+++ /dev/null
@@ -1,26 +0,0 @@
-package ast
-
-import "github.com/d5/tengo/compiler/source"
-
-// IntLit represents an integer literal.
-type IntLit struct {
-	Value    int64
-	ValuePos source.Pos
-	Literal  string
-}
-
-func (e *IntLit) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *IntLit) Pos() source.Pos {
-	return e.ValuePos
-}
-
-// End returns the position of first character immediately after the node.
-func (e *IntLit) End() source.Pos {
-	return source.Pos(int(e.ValuePos) + len(e.Literal))
-}
-
-func (e *IntLit) String() string {
-	return e.Literal
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/map_element_lit.go b/vendor/github.com/d5/tengo/compiler/ast/map_element_lit.go
deleted file mode 100644
index 3d7fca9e..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/map_element_lit.go
+++ /dev/null
@@ -1,27 +0,0 @@
-package ast
-
-import "github.com/d5/tengo/compiler/source"
-
-// MapElementLit represents a map element.
-type MapElementLit struct {
-	Key      string
-	KeyPos   source.Pos
-	ColonPos source.Pos
-	Value    Expr
-}
-
-func (e *MapElementLit) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *MapElementLit) Pos() source.Pos {
-	return e.KeyPos
-}
-
-// End returns the position of first character immediately after the node.
-func (e *MapElementLit) End() source.Pos {
-	return e.Value.End()
-}
-
-func (e *MapElementLit) String() string {
-	return e.Key + ": " + e.Value.String()
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/map_lit.go b/vendor/github.com/d5/tengo/compiler/ast/map_lit.go
deleted file mode 100644
index a228224d..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/map_lit.go
+++ /dev/null
@@ -1,35 +0,0 @@
-package ast
-
-import (
-	"strings"
-
-	"github.com/d5/tengo/compiler/source"
-)
-
-// MapLit represents a map literal.
-type MapLit struct {
-	LBrace   source.Pos
-	Elements []*MapElementLit
-	RBrace   source.Pos
-}
-
-func (e *MapLit) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *MapLit) Pos() source.Pos {
-	return e.LBrace
-}
-
-// End returns the position of first character immediately after the node.
-func (e *MapLit) End() source.Pos {
-	return e.RBrace + 1
-}
-
-func (e *MapLit) String() string {
-	var elements []string
-	for _, m := range e.Elements {
-		elements = append(elements, m.String())
-	}
-
-	return "{" + strings.Join(elements, ", ") + "}"
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/node.go b/vendor/github.com/d5/tengo/compiler/ast/node.go
deleted file mode 100644
index 44677b47..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/node.go
+++ /dev/null
@@ -1,13 +0,0 @@
-package ast
-
-import "github.com/d5/tengo/compiler/source"
-
-// Node represents a node in the AST.
-type Node interface {
-	// Pos returns the position of first character belonging to the node.
-	Pos() source.Pos
-	// End returns the position of first character immediately after the node.
-	End() source.Pos
-	// String returns a string representation of the node.
-	String() string
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/paren_expr.go b/vendor/github.com/d5/tengo/compiler/ast/paren_expr.go
deleted file mode 100644
index 8db4ac02..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/paren_expr.go
+++ /dev/null
@@ -1,26 +0,0 @@
-package ast
-
-import "github.com/d5/tengo/compiler/source"
-
-// ParenExpr represents a parenthesis wrapped expression.
-type ParenExpr struct {
-	Expr   Expr
-	LParen source.Pos
-	RParen source.Pos
-}
-
-func (e *ParenExpr) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *ParenExpr) Pos() source.Pos {
-	return e.LParen
-}
-
-// End returns the position of first character immediately after the node.
-func (e *ParenExpr) End() source.Pos {
-	return e.RParen + 1
-}
-
-func (e *ParenExpr) String() string {
-	return "(" + e.Expr.String() + ")"
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/return_stmt.go b/vendor/github.com/d5/tengo/compiler/ast/return_stmt.go
deleted file mode 100644
index 592d45b8..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/return_stmt.go
+++ /dev/null
@@ -1,35 +0,0 @@
-package ast
-
-import (
-	"github.com/d5/tengo/compiler/source"
-)
-
-// ReturnStmt represents a return statement.
-type ReturnStmt struct {
-	ReturnPos source.Pos
-	Result    Expr
-}
-
-func (s *ReturnStmt) stmtNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (s *ReturnStmt) Pos() source.Pos {
-	return s.ReturnPos
-}
-
-// End returns the position of first character immediately after the node.
-func (s *ReturnStmt) End() source.Pos {
-	if s.Result != nil {
-		return s.Result.End()
-	}
-
-	return s.ReturnPos + 6
-}
-
-func (s *ReturnStmt) String() string {
-	if s.Result != nil {
-		return "return " + s.Result.String()
-	}
-
-	return "return"
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/selector_expr.go b/vendor/github.com/d5/tengo/compiler/ast/selector_expr.go
deleted file mode 100644
index 31d2e6d1..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/selector_expr.go
+++ /dev/null
@@ -1,25 +0,0 @@
-package ast
-
-import "github.com/d5/tengo/compiler/source"
-
-// SelectorExpr represents a selector expression.
-type SelectorExpr struct {
-	Expr Expr
-	Sel  Expr
-}
-
-func (e *SelectorExpr) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *SelectorExpr) Pos() source.Pos {
-	return e.Expr.Pos()
-}
-
-// End returns the position of first character immediately after the node.
-func (e *SelectorExpr) End() source.Pos {
-	return e.Sel.End()
-}
-
-func (e *SelectorExpr) String() string {
-	return e.Expr.String() + "." + e.Sel.String()
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/slice_expr.go b/vendor/github.com/d5/tengo/compiler/ast/slice_expr.go
deleted file mode 100644
index e7e2e05b..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/slice_expr.go
+++ /dev/null
@@ -1,36 +0,0 @@
-package ast
-
-import "github.com/d5/tengo/compiler/source"
-
-// SliceExpr represents a slice expression.
-type SliceExpr struct {
-	Expr   Expr
-	LBrack source.Pos
-	Low    Expr
-	High   Expr
-	RBrack source.Pos
-}
-
-func (e *SliceExpr) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *SliceExpr) Pos() source.Pos {
-	return e.Expr.Pos()
-}
-
-// End returns the position of first character immediately after the node.
-func (e *SliceExpr) End() source.Pos {
-	return e.RBrack + 1
-}
-
-func (e *SliceExpr) String() string {
-	var low, high string
-	if e.Low != nil {
-		low = e.Low.String()
-	}
-	if e.High != nil {
-		high = e.High.String()
-	}
-
-	return e.Expr.String() + "[" + low + ":" + high + "]"
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/stmt.go b/vendor/github.com/d5/tengo/compiler/ast/stmt.go
deleted file mode 100644
index 6b26ba88..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/stmt.go
+++ /dev/null
@@ -1,7 +0,0 @@
-package ast
-
-// Stmt represents a statement in the AST.
-type Stmt interface {
-	Node
-	stmtNode()
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/string_lit.go b/vendor/github.com/d5/tengo/compiler/ast/string_lit.go
deleted file mode 100644
index 2119d34b..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/string_lit.go
+++ /dev/null
@@ -1,26 +0,0 @@
-package ast
-
-import "github.com/d5/tengo/compiler/source"
-
-// StringLit represents a string literal.
-type StringLit struct {
-	Value    string
-	ValuePos source.Pos
-	Literal  string
-}
-
-func (e *StringLit) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *StringLit) Pos() source.Pos {
-	return e.ValuePos
-}
-
-// End returns the position of first character immediately after the node.
-func (e *StringLit) End() source.Pos {
-	return source.Pos(int(e.ValuePos) + len(e.Literal))
-}
-
-func (e *StringLit) String() string {
-	return e.Literal
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/unary_expr.go b/vendor/github.com/d5/tengo/compiler/ast/unary_expr.go
deleted file mode 100644
index 53236146..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/unary_expr.go
+++ /dev/null
@@ -1,29 +0,0 @@
-package ast
-
-import (
-	"github.com/d5/tengo/compiler/source"
-	"github.com/d5/tengo/compiler/token"
-)
-
-// UnaryExpr represents an unary operator expression.
-type UnaryExpr struct {
-	Expr     Expr
-	Token    token.Token
-	TokenPos source.Pos
-}
-
-func (e *UnaryExpr) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *UnaryExpr) Pos() source.Pos {
-	return e.Expr.Pos()
-}
-
-// End returns the position of first character immediately after the node.
-func (e *UnaryExpr) End() source.Pos {
-	return e.Expr.End()
-}
-
-func (e *UnaryExpr) String() string {
-	return "(" + e.Token.String() + e.Expr.String() + ")"
-}
diff --git a/vendor/github.com/d5/tengo/compiler/ast/undefined_lit.go b/vendor/github.com/d5/tengo/compiler/ast/undefined_lit.go
deleted file mode 100644
index 8e51b113..00000000
--- a/vendor/github.com/d5/tengo/compiler/ast/undefined_lit.go
+++ /dev/null
@@ -1,24 +0,0 @@
-package ast
-
-import "github.com/d5/tengo/compiler/source"
-
-// UndefinedLit represents an undefined literal.
-type UndefinedLit struct {
-	TokenPos source.Pos
-}
-
-func (e *UndefinedLit) exprNode() {}
-
-// Pos returns the position of first character belonging to the node.
-func (e *UndefinedLit) Pos() source.Pos {
-	return e.TokenPos
-}
-
-// End returns the position of first character immediately after the node.
-func (e *UndefinedLit) End() source.Pos {
-	return e.TokenPos + 9 // len(undefined) == 9
-}
-
-func (e *UndefinedLit) String() string {
-	return "undefined"
-}