diff --git a/Godeps/Godeps.json b/Godeps/Godeps.json
deleted file mode 100644
index 2177098..0000000
--- a/Godeps/Godeps.json
+++ /dev/null
@@ -1,18 +0,0 @@
-{
-	"ImportPath": "github.com/leonelquinteros/gotext",
-	"GoVersion": "devel +be9d7f6d87 Fri Jun 16 00:31:25 2017 +0000",
-	"Deps": [
-		{
-			"ImportPath": "github.com/mattn/kinako/ast",
-			"Rev": "fbc18625ec69b28ae03b4eea4c349f215840ee09"
-		},
-		{
-			"ImportPath": "github.com/mattn/kinako/parser",
-			"Rev": "fbc18625ec69b28ae03b4eea4c349f215840ee09"
-		},
-		{
-			"ImportPath": "github.com/mattn/kinako/vm",
-			"Rev": "fbc18625ec69b28ae03b4eea4c349f215840ee09"
-		}
-	]
-}
diff --git a/Godeps/Readme b/Godeps/Readme
deleted file mode 100644
index 4cdaa53..0000000
--- a/Godeps/Readme
+++ /dev/null
@@ -1,5 +0,0 @@
-This directory tree is generated automatically by godep.
-
-Please do not edit.
-
-See https://github.com/tools/godep for more information.
diff --git a/Gopkg.lock b/Gopkg.lock
new file mode 100644
index 0000000..b5dc577
--- /dev/null
+++ b/Gopkg.lock
@@ -0,0 +1,15 @@
+# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
+
+
+[[projects]]
+  branch = "master"
+  name = "github.com/mattn/kinako"
+  packages = ["ast","parser","vm"]
+  revision = "332c0a7e205a29536e672337a4bea6c7a96b04c1"
+
+[solve-meta]
+  analyzer-name = "dep"
+  analyzer-version = 1
+  inputs-digest = "d3069fabe2d6f79fe33ad88133e861db84aef0400f6b949c4e64395913b3ae97"
+  solver-name = "gps-cdcl"
+  solver-version = 1
diff --git a/Gopkg.toml b/Gopkg.toml
new file mode 100644
index 0000000..353e507
--- /dev/null
+++ b/Gopkg.toml
@@ -0,0 +1,26 @@
+
+# Gopkg.toml example
+#
+# Refer to https://github.com/golang/dep/blob/master/docs/Gopkg.toml.md
+# for detailed Gopkg.toml documentation.
+#
+# required = ["github.com/user/thing/cmd/thing"]
+# ignored = ["github.com/user/project/pkgX", "bitbucket.org/user/project/pkgA/pkgY"]
+#
+# [[constraint]]
+#   name = "github.com/user/project"
+#   version = "1.0.0"
+#
+# [[constraint]]
+#   name = "github.com/user/project2"
+#   branch = "dev"
+#   source = "github.com/myfork/project2"
+#
+# [[override]]
+#  name = "github.com/x/y"
+#  version = "2.4.0"
+
+
+[[constraint]]
+  branch = "master"
+  name = "github.com/mattn/kinako"
diff --git a/vendor/github.com/mattn/kinako/README.md b/vendor/github.com/mattn/kinako/README.md
new file mode 100644
index 0000000..0b73325
--- /dev/null
+++ b/vendor/github.com/mattn/kinako/README.md
@@ -0,0 +1,37 @@
+# kinako
+
+Kinako is small VM written in Go.
+
+![](https://raw.githubusercontent.com/mattn/kinako/master/kinako.png)
+
+(Picture licensed under CC BY-SA 3.0 by wikipedia)
+
+## Installation
+Requires Go.
+```
+$ go get -u github.com/mattn/kinako
+```
+
+## Usage
+
+Embedding the interpreter into your own program:
+
+```Go
+var env = vm.NewEnv()
+
+env.Define("foo", 1)
+val, err := env.Execute(`foo + 3`)
+if err != nil {
+	panic(err)
+}
+
+fmt.Println(val)
+```
+
+# License
+
+MIT
+
+# Author
+
+Yasuhiro Matsumoto (a.k.a mattn)
diff --git a/vendor/github.com/mattn/kinako/_example/main.go b/vendor/github.com/mattn/kinako/_example/main.go
new file mode 100644
index 0000000..71e2054
--- /dev/null
+++ b/vendor/github.com/mattn/kinako/_example/main.go
@@ -0,0 +1,18 @@
+package main
+
+import (
+	"fmt"
+	"log"
+
+	"github.com/mattn/kinako/vm"
+)
+
+func main() {
+	env := vm.NewEnv()
+	v, err := env.Execute(`foo=1; foo+3`)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	fmt.Println(v)
+}
diff --git a/vendor/github.com/mattn/kinako/ast/expr.go b/vendor/github.com/mattn/kinako/ast/expr.go
index 26a36e5..758cc08 100644
--- a/vendor/github.com/mattn/kinako/ast/expr.go
+++ b/vendor/github.com/mattn/kinako/ast/expr.go
@@ -75,6 +75,14 @@ type TernaryOpExpr struct {
 	Rhs  Expr
 }
 
+// CallExpr provide calling expression.
+type CallExpr struct {
+	ExprImpl
+	Func     interface{}
+	Name     string
+	SubExprs []Expr
+}
+
 // ParenExpr provide parent block expression.
 type ParenExpr struct {
 	ExprImpl
diff --git a/vendor/github.com/mattn/kinako/kinako.png b/vendor/github.com/mattn/kinako/kinako.png
new file mode 100644
index 0000000..a7130c6
Binary files /dev/null and b/vendor/github.com/mattn/kinako/kinako.png differ
diff --git a/vendor/github.com/mattn/kinako/parser/parser.go b/vendor/github.com/mattn/kinako/parser/parser.go
index 764c106..661cd19 100644
--- a/vendor/github.com/mattn/kinako/parser/parser.go
+++ b/vendor/github.com/mattn/kinako/parser/parser.go
@@ -8,13 +8,14 @@ import (
 	"github.com/mattn/kinako/ast"
 )
 
-//line parser.go.y:15
+//line parser.go.y:16
 type yySymType struct {
 	yys       int
 	compstmt  []ast.Stmt
 	stmts     []ast.Stmt
 	stmt      ast.Stmt
 	expr      ast.Expr
+	exprs     []ast.Expr
 	tok       ast.Token
 	term      ast.Token
 	terms     ast.Token
@@ -82,106 +83,107 @@ const yyEofCode = 1
 const yyErrCode = 2
 const yyInitialStackSize = 16
 
-//line parser.go.y:194
+//line parser.go.y:213
 
 //line yacctab:1
 var yyExca = [...]int{
 	-1, 1,
 	1, -1,
 	-2, 0,
-	-1, 49,
+	-1, 50,
 	7, 0,
 	8, 0,
 	-2, 20,
-	-1, 50,
+	-1, 51,
 	7, 0,
 	8, 0,
 	-2, 21,
 }
 
-const yyNprod = 36
+const yyNprod = 40
 const yyPrivate = 57344
 
 var yyTokenNames []string
 var yyStates []string
 
-const yyLast = 249
+const yyLast = 251
 
 var yyAct = [...]int{
 
-	9, 6, 7, 33, 35, 4, 22, 23, 3, 18,
-	24, 25, 26, 37, 38, 39, 2, 40, 33, 35,
-	17, 42, 43, 44, 45, 46, 47, 48, 49, 50,
-	51, 52, 53, 54, 55, 56, 57, 58, 27, 28,
-	30, 32, 34, 36, 8, 1, 21, 60, 0, 29,
+	9, 6, 7, 33, 35, 37, 22, 23, 60, 3,
+	24, 25, 26, 38, 39, 40, 1, 41, 33, 35,
+	8, 43, 44, 45, 46, 47, 48, 49, 50, 51,
+	52, 53, 54, 55, 56, 57, 58, 59, 61, 42,
+	27, 28, 30, 32, 34, 36, 65, 0, 21, 63,
+	4, 29, 31, 2, 18, 22, 23, 17, 0, 24,
+	25, 26, 64, 0, 66, 0, 67, 33, 35, 27,
+	28, 30, 32, 34, 36, 0, 0, 21, 0, 0,
+	29, 31, 0, 0, 22, 23, 0, 0, 24, 25,
+	26, 0, 0, 0, 0, 62, 33, 35, 27, 28,
+	30, 32, 34, 36, 0, 20, 21, 0, 0, 29,
 	31, 0, 0, 22, 23, 5, 0, 24, 25, 26,
-	19, 61, 0, 41, 0, 33, 35, 27, 28, 30,
+	19, 0, 0, 0, 0, 33, 35, 27, 28, 30,
 	32, 34, 36, 0, 19, 21, 0, 0, 29, 31,
 	0, 0, 22, 23, 0, 0, 24, 25, 26, 0,
-	0, 0, 0, 59, 33, 35, 27, 28, 30, 32,
-	34, 36, 0, 20, 21, 0, 0, 29, 31, 0,
-	0, 22, 23, 0, 0, 24, 25, 26, 0, 0,
-	0, 0, 0, 33, 35, 27, 28, 30, 32, 34,
-	36, 0, 0, 21, 0, 0, 29, 31, 0, 0,
-	22, 23, 0, 0, 24, 25, 26, 0, 0, 0,
-	0, 0, 33, 35, 27, 28, 30, 32, 0, 36,
-	0, 0, 0, 0, 0, 29, 31, 0, 0, 22,
-	23, 0, 0, 24, 25, 26, 27, 28, 30, 32,
-	0, 33, 35, 0, 0, 0, 0, 29, 31, 0,
-	0, 22, 23, 0, 0, 24, 25, 26, 30, 32,
-	10, 11, 15, 33, 35, 0, 0, 29, 31, 0,
-	0, 22, 23, 0, 0, 24, 25, 26, 0, 12,
-	10, 11, 15, 33, 35, 0, 13, 14, 16, 24,
-	25, 26, 6, 7, 0, 0, 0, 33, 35, 12,
-	0, 0, 0, 0, 0, 0, 13, 14, 16,
+	0, 0, 0, 0, 33, 35, 27, 28, 30, 32,
+	0, 36, 0, 0, 0, 0, 0, 29, 31, 0,
+	0, 22, 23, 0, 0, 24, 25, 26, 27, 28,
+	30, 32, 0, 33, 35, 0, 0, 0, 0, 29,
+	31, 0, 0, 22, 23, 0, 0, 24, 25, 26,
+	30, 32, 10, 11, 15, 33, 35, 0, 0, 29,
+	31, 0, 0, 22, 23, 0, 0, 24, 25, 26,
+	0, 12, 10, 11, 15, 33, 35, 0, 13, 14,
+	16, 24, 25, 26, 6, 7, 0, 0, 0, 33,
+	35, 12, 0, 0, 0, 0, 0, 0, 13, 14,
+	16,
 }
 var yyPact = [...]int{
 
-	-35, -1000, 216, -35, -35, -1000, -1000, -1000, -1000, 89,
-	-1000, -1000, 216, 216, 216, -1000, 216, -1000, 196, -1000,
-	216, 216, 216, 216, 216, 216, 216, 216, 216, 216,
-	216, 216, 216, 216, 216, 216, 216, -31, -31, -31,
-	60, -1000, 118, 31, 203, 203, -31, -31, -31, 189,
-	189, -16, -16, -16, -16, 118, 147, 118, 169, -1000,
-	216, 118,
+	-35, -1000, 218, -35, -35, -1000, -1000, -1000, -1000, 91,
+	-27, -1000, 218, 218, 218, -1000, 218, -1000, 198, -1000,
+	218, 218, 218, 218, 218, 218, 218, 218, 218, 218,
+	218, 218, 218, 218, 218, 218, 218, 218, -31, -31,
+	-31, 62, -1000, 120, 33, 205, 205, -31, -31, -31,
+	191, 191, -16, -16, -16, -16, 120, 149, 120, 171,
+	29, 120, -1000, 218, -1000, 218, 120, 120,
 }
 var yyPgo = [...]int{
 
-	0, 45, 8, 44, 0, 16, 5, 55,
+	0, 16, 9, 20, 0, 8, 53, 50, 115,
 }
 var yyR1 = [...]int{
 
 	0, 1, 1, 2, 2, 3, 3, 4, 4, 4,
 	4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
 	4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
-	5, 5, 6, 6, 7, 7,
+	4, 5, 5, 5, 6, 6, 7, 7, 8, 8,
 }
 var yyR2 = [...]int{
 
 	0, 1, 2, 2, 3, 3, 1, 1, 1, 2,
 	2, 2, 1, 5, 3, 3, 3, 3, 3, 3,
 	3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
-	0, 1, 1, 2, 1, 1,
+	4, 0, 1, 3, 0, 1, 1, 2, 1, 1,
 }
 var yyChk = [...]int{
 
-	-1000, -1, -5, -2, -6, -7, 36, 37, -3, -4,
-	4, 5, 23, 30, 31, 6, 32, -5, -6, -7,
+	-1000, -1, -6, -2, -7, -8, 36, 37, -3, -4,
+	4, 5, 23, 30, 31, 6, 32, -6, -7, -8,
 	14, 15, 22, 23, 26, 27, 28, 7, 8, 18,
-	9, 19, 10, 34, 11, 35, 12, -4, -4, -4,
-	-4, -3, -4, -4, -4, -4, -4, -4, -4, -4,
-	-4, -4, -4, -4, -4, -4, -4, -4, -4, 33,
-	16, -4,
+	9, 19, 10, 34, 11, 35, 12, 32, -4, -4,
+	-4, -4, -3, -4, -4, -4, -4, -4, -4, -4,
+	-4, -4, -4, -4, -4, -4, -4, -4, -4, -4,
+	-5, -4, 33, 16, 33, 17, -4, -4,
 }
 var yyDef = [...]int{
 
-	30, -2, 1, 30, 31, 32, 34, 35, 3, 6,
-	7, 8, 0, 0, 0, 12, 0, 2, 31, 33,
+	34, -2, 1, 34, 35, 36, 38, 39, 3, 6,
+	7, 8, 0, 0, 0, 12, 0, 2, 35, 37,
 	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-	0, 0, 0, 0, 0, 0, 0, 9, 10, 11,
-	0, 4, 5, 0, 15, 16, 17, 18, 19, -2,
-	-2, 22, 23, 24, 25, 26, 27, 28, 29, 14,
-	0, 13,
+	0, 0, 0, 0, 0, 0, 0, 31, 9, 10,
+	11, 0, 4, 5, 0, 15, 16, 17, 18, 19,
+	-2, -2, 22, 23, 24, 25, 26, 27, 28, 29,
+	0, 32, 14, 0, 30, 0, 13, 33,
 }
 var yyTok1 = [...]int{
 
@@ -547,19 +549,19 @@ yydefault:
 
 	case 1:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line parser.go.y:43
+		//line parser.go.y:45
 		{
 			yyVAL.compstmt = nil
 		}
 	case 2:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line parser.go.y:47
+		//line parser.go.y:49
 		{
 			yyVAL.compstmt = yyDollar[1].stmts
 		}
 	case 3:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line parser.go.y:53
+		//line parser.go.y:55
 		{
 			yyVAL.stmts = []ast.Stmt{yyDollar[2].stmt}
 			if l, ok := yylex.(*Lexer); ok {
@@ -568,7 +570,7 @@ yydefault:
 		}
 	case 4:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line parser.go.y:60
+		//line parser.go.y:62
 		{
 			if yyDollar[3].stmt != nil {
 				yyVAL.stmts = append(yyDollar[1].stmts, yyDollar[3].stmt)
@@ -579,172 +581,196 @@ yydefault:
 		}
 	case 5:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line parser.go.y:71
+		//line parser.go.y:73
 		{
 			yyVAL.stmt = &ast.LetStmt{Lhs: yyDollar[1].expr, Operator: "=", Rhs: yyDollar[3].expr}
 		}
 	case 6:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line parser.go.y:75
+		//line parser.go.y:77
 		{
 			yyVAL.stmt = &ast.ExprStmt{Expr: yyDollar[1].expr}
 		}
 	case 7:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line parser.go.y:81
+		//line parser.go.y:83
 		{
 			yyVAL.expr = &ast.IdentExpr{Lit: yyDollar[1].tok.Lit}
 		}
 	case 8:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line parser.go.y:85
+		//line parser.go.y:87
 		{
 			yyVAL.expr = &ast.NumberExpr{Lit: yyDollar[1].tok.Lit}
 		}
 	case 9:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line parser.go.y:89
+		//line parser.go.y:91
 		{
 			yyVAL.expr = &ast.UnaryExpr{Operator: "-", Expr: yyDollar[2].expr}
 		}
 	case 10:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line parser.go.y:93
+		//line parser.go.y:95
 		{
 			yyVAL.expr = &ast.UnaryExpr{Operator: "!", Expr: yyDollar[2].expr}
 		}
 	case 11:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line parser.go.y:97
+		//line parser.go.y:99
 		{
 			yyVAL.expr = &ast.UnaryExpr{Operator: "^", Expr: yyDollar[2].expr}
 		}
 	case 12:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line parser.go.y:101
+		//line parser.go.y:103
 		{
 			yyVAL.expr = &ast.StringExpr{Lit: yyDollar[1].tok.Lit}
 		}
 	case 13:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line parser.go.y:105
+		//line parser.go.y:107
 		{
 			yyVAL.expr = &ast.TernaryOpExpr{Expr: yyDollar[1].expr, Lhs: yyDollar[3].expr, Rhs: yyDollar[5].expr}
 		}
 	case 14:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line parser.go.y:109
+		//line parser.go.y:111
 		{
 			yyVAL.expr = &ast.ParenExpr{SubExpr: yyDollar[2].expr}
 		}
 	case 15:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line parser.go.y:113
+		//line parser.go.y:115
 		{
 			yyVAL.expr = &ast.BinOpExpr{Lhs: yyDollar[1].expr, Operator: "+", Rhs: yyDollar[3].expr}
 		}
 	case 16:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line parser.go.y:117
+		//line parser.go.y:119
 		{
 			yyVAL.expr = &ast.BinOpExpr{Lhs: yyDollar[1].expr, Operator: "-", Rhs: yyDollar[3].expr}
 		}
 	case 17:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line parser.go.y:121
+		//line parser.go.y:123
 		{
 			yyVAL.expr = &ast.BinOpExpr{Lhs: yyDollar[1].expr, Operator: "*", Rhs: yyDollar[3].expr}
 		}
 	case 18:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line parser.go.y:125
+		//line parser.go.y:127
 		{
 			yyVAL.expr = &ast.BinOpExpr{Lhs: yyDollar[1].expr, Operator: "/", Rhs: yyDollar[3].expr}
 		}
 	case 19:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line parser.go.y:129
+		//line parser.go.y:131
 		{
 			yyVAL.expr = &ast.BinOpExpr{Lhs: yyDollar[1].expr, Operator: "%", Rhs: yyDollar[3].expr}
 		}
 	case 20:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line parser.go.y:133
+		//line parser.go.y:135
 		{
 			yyVAL.expr = &ast.BinOpExpr{Lhs: yyDollar[1].expr, Operator: "==", Rhs: yyDollar[3].expr}
 		}
 	case 21:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line parser.go.y:137
+		//line parser.go.y:139
 		{
 			yyVAL.expr = &ast.BinOpExpr{Lhs: yyDollar[1].expr, Operator: "!=", Rhs: yyDollar[3].expr}
 		}
 	case 22:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line parser.go.y:141
+		//line parser.go.y:143
 		{
 			yyVAL.expr = &ast.BinOpExpr{Lhs: yyDollar[1].expr, Operator: ">", Rhs: yyDollar[3].expr}
 		}
 	case 23:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line parser.go.y:145
+		//line parser.go.y:147
 		{
 			yyVAL.expr = &ast.BinOpExpr{Lhs: yyDollar[1].expr, Operator: ">=", Rhs: yyDollar[3].expr}
 		}
 	case 24:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line parser.go.y:149
+		//line parser.go.y:151
 		{
 			yyVAL.expr = &ast.BinOpExpr{Lhs: yyDollar[1].expr, Operator: "<", Rhs: yyDollar[3].expr}
 		}
 	case 25:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line parser.go.y:153
+		//line parser.go.y:155
 		{
 			yyVAL.expr = &ast.BinOpExpr{Lhs: yyDollar[1].expr, Operator: "<=", Rhs: yyDollar[3].expr}
 		}
 	case 26:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line parser.go.y:157
+		//line parser.go.y:159
 		{
 			yyVAL.expr = &ast.BinOpExpr{Lhs: yyDollar[1].expr, Operator: "|", Rhs: yyDollar[3].expr}
 		}
 	case 27:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line parser.go.y:161
+		//line parser.go.y:163
 		{
 			yyVAL.expr = &ast.BinOpExpr{Lhs: yyDollar[1].expr, Operator: "||", Rhs: yyDollar[3].expr}
 		}
 	case 28:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line parser.go.y:165
+		//line parser.go.y:167
 		{
 			yyVAL.expr = &ast.BinOpExpr{Lhs: yyDollar[1].expr, Operator: "&", Rhs: yyDollar[3].expr}
 		}
 	case 29:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line parser.go.y:169
+		//line parser.go.y:171
 		{
 			yyVAL.expr = &ast.BinOpExpr{Lhs: yyDollar[1].expr, Operator: "&&", Rhs: yyDollar[3].expr}
 		}
+	case 30:
+		yyDollar = yyS[yypt-4 : yypt+1]
+		//line parser.go.y:175
+		{
+			yyVAL.expr = &ast.CallExpr{Name: yyDollar[1].tok.Lit, SubExprs: yyDollar[3].exprs}
+		}
+	case 31:
+		yyDollar = yyS[yypt-0 : yypt+1]
+		//line parser.go.y:180
+		{
+			yyVAL.exprs = nil
+		}
 	case 32:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line parser.go.y:179
+		//line parser.go.y:184
 		{
+			yyVAL.exprs = []ast.Expr{yyDollar[1].expr}
 		}
 	case 33:
+		yyDollar = yyS[yypt-3 : yypt+1]
+		//line parser.go.y:188
+		{
+			yyVAL.exprs = append(yyDollar[1].exprs, yyDollar[3].expr)
+		}
+	case 36:
+		yyDollar = yyS[yypt-1 : yypt+1]
+		//line parser.go.y:198
+		{
+		}
+	case 37:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line parser.go.y:182
+		//line parser.go.y:201
 		{
 		}
-	case 34:
+	case 38:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line parser.go.y:187
+		//line parser.go.y:206
 		{
 		}
-	case 35:
+	case 39:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line parser.go.y:190
+		//line parser.go.y:209
 		{
 		}
 	}
diff --git a/vendor/github.com/mattn/kinako/parser/parser.go.y b/vendor/github.com/mattn/kinako/parser/parser.go.y
index e1323d7..84086ac 100644
--- a/vendor/github.com/mattn/kinako/parser/parser.go.y
+++ b/vendor/github.com/mattn/kinako/parser/parser.go.y
@@ -11,12 +11,14 @@ import (
 %type<stmts> stmts
 %type<stmt> stmt
 %type<expr> expr
+%type<exprs> exprs
 
 %union{
 	compstmt               []ast.Stmt
 	stmts                  []ast.Stmt
 	stmt                   ast.Stmt
 	expr                   ast.Expr
+	exprs                  []ast.Expr
 	tok                    ast.Token
 	term                   ast.Token
 	terms                  ast.Token
@@ -169,6 +171,23 @@ expr :
 	{
 		$$ = &ast.BinOpExpr{Lhs: $1, Operator: "&&", Rhs: $3}
 	}
+	| IDENT '(' exprs ')'
+	{
+		$$ = &ast.CallExpr{Name: $1.Lit, SubExprs: $3}
+	}
+
+exprs :
+	{
+		$$ = nil
+	}
+	| expr 
+	{
+		$$ = []ast.Expr{$1}
+	}
+	| exprs ',' expr
+	{
+		$$ = append($1, $3)
+	}
 
 opt_terms : /* none */
 	| terms
diff --git a/vendor/github.com/mattn/kinako/parser/y.output b/vendor/github.com/mattn/kinako/parser/y.output
index 2f569b8..1a0f45e 100644
--- a/vendor/github.com/mattn/kinako/parser/y.output
+++ b/vendor/github.com/mattn/kinako/parser/y.output
@@ -1,11 +1,11 @@
 
 state 0
 	$accept: .compstmt $end 
-	opt_terms: .    (30)
+	opt_terms: .    (34)
 
 	';'  shift 6
 	'\n'  shift 7
-	.  reduce 30 (src line 173)
+	.  reduce 34 (src line 192)
 
 	compstmt  goto 1
 	stmts  goto 3
@@ -31,7 +31,7 @@ state 2
 	'!'  shift 13
 	'^'  shift 14
 	'('  shift 16
-	.  reduce 1 (src line 42)
+	.  reduce 1 (src line 44)
 
 	stmt  goto 8
 	expr  goto 9
@@ -39,48 +39,48 @@ state 2
 state 3
 	compstmt:  stmts.opt_terms 
 	stmts:  stmts.terms stmt 
-	opt_terms: .    (30)
+	opt_terms: .    (34)
 
 	';'  shift 6
 	'\n'  shift 7
-	.  reduce 30 (src line 173)
+	.  reduce 34 (src line 192)
 
 	opt_terms  goto 17
 	terms  goto 18
 	term  goto 5
 
 state 4
-	opt_terms:  terms.    (31)
+	opt_terms:  terms.    (35)
 	terms:  terms.term 
 
 	';'  shift 6
 	'\n'  shift 7
-	.  reduce 31 (src line 174)
+	.  reduce 35 (src line 193)
 
 	term  goto 19
 
 state 5
-	terms:  term.    (32)
+	terms:  term.    (36)
 
-	.  reduce 32 (src line 178)
+	.  reduce 36 (src line 197)
 
 
 state 6
-	term:  ';'.    (34)
+	term:  ';'.    (38)
 
-	.  reduce 34 (src line 186)
+	.  reduce 38 (src line 205)
 
 
 state 7
-	term:  '\n'.    (35)
+	term:  '\n'.    (39)
 
-	.  reduce 35 (src line 189)
+	.  reduce 39 (src line 208)
 
 
 state 8
 	stmts:  opt_terms stmt.    (3)
 
-	.  reduce 3 (src line 51)
+	.  reduce 3 (src line 53)
 
 
 state 9
@@ -120,19 +120,21 @@ state 9
 	'%'  shift 26
 	'|'  shift 33
 	'&'  shift 35
-	.  reduce 6 (src line 74)
+	.  reduce 6 (src line 76)
 
 
 state 10
 	expr:  IDENT.    (7)
+	expr:  IDENT.'(' exprs ')' 
 
-	.  reduce 7 (src line 79)
+	'('  shift 37
+	.  reduce 7 (src line 81)
 
 
 state 11
 	expr:  NUMBER.    (8)
 
-	.  reduce 8 (src line 84)
+	.  reduce 8 (src line 86)
 
 
 state 12
@@ -147,7 +149,7 @@ state 12
 	'('  shift 16
 	.  error
 
-	expr  goto 37
+	expr  goto 38
 
 state 13
 	expr:  '!'.expr 
@@ -161,7 +163,7 @@ state 13
 	'('  shift 16
 	.  error
 
-	expr  goto 38
+	expr  goto 39
 
 state 14
 	expr:  '^'.expr 
@@ -175,12 +177,12 @@ state 14
 	'('  shift 16
 	.  error
 
-	expr  goto 39
+	expr  goto 40
 
 state 15
 	expr:  STRING.    (12)
 
-	.  reduce 12 (src line 100)
+	.  reduce 12 (src line 102)
 
 
 state 16
@@ -195,17 +197,17 @@ state 16
 	'('  shift 16
 	.  error
 
-	expr  goto 40
+	expr  goto 41
 
 state 17
 	compstmt:  stmts opt_terms.    (2)
 
-	.  reduce 2 (src line 46)
+	.  reduce 2 (src line 48)
 
 
 state 18
 	stmts:  stmts terms.stmt 
-	opt_terms:  terms.    (31)
+	opt_terms:  terms.    (35)
 	terms:  terms.term 
 
 	IDENT  shift 10
@@ -217,16 +219,16 @@ state 18
 	'('  shift 16
 	';'  shift 6
 	'\n'  shift 7
-	.  reduce 31 (src line 174)
+	.  reduce 35 (src line 193)
 
-	stmt  goto 41
+	stmt  goto 42
 	expr  goto 9
 	term  goto 19
 
 state 19
-	terms:  terms term.    (33)
+	terms:  terms term.    (37)
 
-	.  reduce 33 (src line 181)
+	.  reduce 37 (src line 200)
 
 
 state 20
@@ -241,7 +243,7 @@ state 20
 	'('  shift 16
 	.  error
 
-	expr  goto 42
+	expr  goto 43
 
 state 21
 	expr:  expr '?'.expr ':' expr 
@@ -255,7 +257,7 @@ state 21
 	'('  shift 16
 	.  error
 
-	expr  goto 43
+	expr  goto 44
 
 state 22
 	expr:  expr '+'.expr 
@@ -269,7 +271,7 @@ state 22
 	'('  shift 16
 	.  error
 
-	expr  goto 44
+	expr  goto 45
 
 state 23
 	expr:  expr '-'.expr 
@@ -283,7 +285,7 @@ state 23
 	'('  shift 16
 	.  error
 
-	expr  goto 45
+	expr  goto 46
 
 state 24
 	expr:  expr '*'.expr 
@@ -297,7 +299,7 @@ state 24
 	'('  shift 16
 	.  error
 
-	expr  goto 46
+	expr  goto 47
 
 state 25
 	expr:  expr '/'.expr 
@@ -311,7 +313,7 @@ state 25
 	'('  shift 16
 	.  error
 
-	expr  goto 47
+	expr  goto 48
 
 state 26
 	expr:  expr '%'.expr 
@@ -325,7 +327,7 @@ state 26
 	'('  shift 16
 	.  error
 
-	expr  goto 48
+	expr  goto 49
 
 state 27
 	expr:  expr EQEQ.expr 
@@ -339,7 +341,7 @@ state 27
 	'('  shift 16
 	.  error
 
-	expr  goto 49
+	expr  goto 50
 
 state 28
 	expr:  expr NEQ.expr 
@@ -353,7 +355,7 @@ state 28
 	'('  shift 16
 	.  error
 
-	expr  goto 50
+	expr  goto 51
 
 state 29
 	expr:  expr '>'.expr 
@@ -367,7 +369,7 @@ state 29
 	'('  shift 16
 	.  error
 
-	expr  goto 51
+	expr  goto 52
 
 state 30
 	expr:  expr GE.expr 
@@ -381,7 +383,7 @@ state 30
 	'('  shift 16
 	.  error
 
-	expr  goto 52
+	expr  goto 53
 
 state 31
 	expr:  expr '<'.expr 
@@ -395,7 +397,7 @@ state 31
 	'('  shift 16
 	.  error
 
-	expr  goto 53
+	expr  goto 54
 
 state 32
 	expr:  expr LE.expr 
@@ -409,7 +411,7 @@ state 32
 	'('  shift 16
 	.  error
 
-	expr  goto 54
+	expr  goto 55
 
 state 33
 	expr:  expr '|'.expr 
@@ -423,7 +425,7 @@ state 33
 	'('  shift 16
 	.  error
 
-	expr  goto 55
+	expr  goto 56
 
 state 34
 	expr:  expr OROR.expr 
@@ -437,7 +439,7 @@ state 34
 	'('  shift 16
 	.  error
 
-	expr  goto 56
+	expr  goto 57
 
 state 35
 	expr:  expr '&'.expr 
@@ -451,7 +453,7 @@ state 35
 	'('  shift 16
 	.  error
 
-	expr  goto 57
+	expr  goto 58
 
 state 36
 	expr:  expr ANDAND.expr 
@@ -465,11 +467,27 @@ state 36
 	'('  shift 16
 	.  error
 
-	expr  goto 58
+	expr  goto 59
 
-37: shift/reduce conflict (shift 33(0), red'n 9(10)) on '|'
-37: shift/reduce conflict (shift 35(0), red'n 9(10)) on '&'
 state 37
+	expr:  IDENT '('.exprs ')' 
+	exprs: .    (31)
+
+	IDENT  shift 10
+	NUMBER  shift 11
+	STRING  shift 15
+	'-'  shift 12
+	'!'  shift 13
+	'^'  shift 14
+	'('  shift 16
+	.  reduce 31 (src line 179)
+
+	expr  goto 61
+	exprs  goto 60
+
+38: shift/reduce conflict (shift 33(0), red'n 9(10)) on '|'
+38: shift/reduce conflict (shift 35(0), red'n 9(10)) on '&'
+state 38
 	expr:  '-' expr.    (9)
 	expr:  expr.'?' expr ':' expr 
 	expr:  expr.'+' expr 
@@ -490,12 +508,12 @@ state 37
 
 	'|'  shift 33
 	'&'  shift 35
-	.  reduce 9 (src line 88)
+	.  reduce 9 (src line 90)
 
 
-38: shift/reduce conflict (shift 33(0), red'n 10(10)) on '|'
-38: shift/reduce conflict (shift 35(0), red'n 10(10)) on '&'
-state 38
+39: shift/reduce conflict (shift 33(0), red'n 10(10)) on '|'
+39: shift/reduce conflict (shift 35(0), red'n 10(10)) on '&'
+state 39
 	expr:  '!' expr.    (10)
 	expr:  expr.'?' expr ':' expr 
 	expr:  expr.'+' expr 
@@ -516,12 +534,12 @@ state 38
 
 	'|'  shift 33
 	'&'  shift 35
-	.  reduce 10 (src line 92)
+	.  reduce 10 (src line 94)
 
 
-39: shift/reduce conflict (shift 33(0), red'n 11(10)) on '|'
-39: shift/reduce conflict (shift 35(0), red'n 11(10)) on '&'
-state 39
+40: shift/reduce conflict (shift 33(0), red'n 11(10)) on '|'
+40: shift/reduce conflict (shift 35(0), red'n 11(10)) on '&'
+state 40
 	expr:  '^' expr.    (11)
 	expr:  expr.'?' expr ':' expr 
 	expr:  expr.'+' expr 
@@ -542,10 +560,10 @@ state 39
 
 	'|'  shift 33
 	'&'  shift 35
-	.  reduce 11 (src line 96)
+	.  reduce 11 (src line 98)
 
 
-state 40
+state 41
 	expr:  expr.'?' expr ':' expr 
 	expr:  '(' expr.')' 
 	expr:  expr.'+' expr 
@@ -578,19 +596,19 @@ state 40
 	'*'  shift 24
 	'/'  shift 25
 	'%'  shift 26
-	')'  shift 59
+	')'  shift 62
 	'|'  shift 33
 	'&'  shift 35
 	.  error
 
 
-state 41
+state 42
 	stmts:  stmts terms stmt.    (4)
 
-	.  reduce 4 (src line 59)
+	.  reduce 4 (src line 61)
 
 
-state 42
+state 43
 	stmt:  expr '=' expr.    (5)
 	expr:  expr.'?' expr ':' expr 
 	expr:  expr.'+' expr 
@@ -625,10 +643,10 @@ state 42
 	'%'  shift 26
 	'|'  shift 33
 	'&'  shift 35
-	.  reduce 5 (src line 69)
+	.  reduce 5 (src line 71)
 
 
-state 43
+state 44
 	expr:  expr.'?' expr ':' expr 
 	expr:  expr '?' expr.':' expr 
 	expr:  expr.'+' expr 
@@ -654,7 +672,7 @@ state 43
 	OROR  shift 34
 	ANDAND  shift 36
 	'?'  shift 21
-	':'  shift 60
+	':'  shift 63
 	'>'  shift 29
 	'<'  shift 31
 	'+'  shift 22
@@ -667,9 +685,9 @@ state 43
 	.  error
 
 
-44: shift/reduce conflict (shift 33(0), red'n 15(8)) on '|'
-44: shift/reduce conflict (shift 35(0), red'n 15(8)) on '&'
-state 44
+45: shift/reduce conflict (shift 33(0), red'n 15(8)) on '|'
+45: shift/reduce conflict (shift 35(0), red'n 15(8)) on '&'
+state 45
 	expr:  expr.'?' expr ':' expr 
 	expr:  expr.'+' expr 
 	expr:  expr '+' expr.    (15)
@@ -693,12 +711,12 @@ state 44
 	'%'  shift 26
 	'|'  shift 33
 	'&'  shift 35
-	.  reduce 15 (src line 112)
+	.  reduce 15 (src line 114)
 
 
-45: shift/reduce conflict (shift 33(0), red'n 16(8)) on '|'
-45: shift/reduce conflict (shift 35(0), red'n 16(8)) on '&'
-state 45
+46: shift/reduce conflict (shift 33(0), red'n 16(8)) on '|'
+46: shift/reduce conflict (shift 35(0), red'n 16(8)) on '&'
+state 46
 	expr:  expr.'?' expr ':' expr 
 	expr:  expr.'+' expr 
 	expr:  expr.'-' expr 
@@ -722,12 +740,12 @@ state 45
 	'%'  shift 26
 	'|'  shift 33
 	'&'  shift 35
-	.  reduce 16 (src line 116)
+	.  reduce 16 (src line 118)
 
 
-46: shift/reduce conflict (shift 33(0), red'n 17(9)) on '|'
-46: shift/reduce conflict (shift 35(0), red'n 17(9)) on '&'
-state 46
+47: shift/reduce conflict (shift 33(0), red'n 17(9)) on '|'
+47: shift/reduce conflict (shift 35(0), red'n 17(9)) on '&'
+state 47
 	expr:  expr.'?' expr ':' expr 
 	expr:  expr.'+' expr 
 	expr:  expr.'-' expr 
@@ -748,12 +766,12 @@ state 46
 
 	'|'  shift 33
 	'&'  shift 35
-	.  reduce 17 (src line 120)
+	.  reduce 17 (src line 122)
 
 
-47: shift/reduce conflict (shift 33(0), red'n 18(9)) on '|'
-47: shift/reduce conflict (shift 35(0), red'n 18(9)) on '&'
-state 47
+48: shift/reduce conflict (shift 33(0), red'n 18(9)) on '|'
+48: shift/reduce conflict (shift 35(0), red'n 18(9)) on '&'
+state 48
 	expr:  expr.'?' expr ':' expr 
 	expr:  expr.'+' expr 
 	expr:  expr.'-' expr 
@@ -774,12 +792,12 @@ state 47
 
 	'|'  shift 33
 	'&'  shift 35
-	.  reduce 18 (src line 124)
+	.  reduce 18 (src line 126)
 
 
-48: shift/reduce conflict (shift 33(0), red'n 19(9)) on '|'
-48: shift/reduce conflict (shift 35(0), red'n 19(9)) on '&'
-state 48
+49: shift/reduce conflict (shift 33(0), red'n 19(9)) on '|'
+49: shift/reduce conflict (shift 35(0), red'n 19(9)) on '&'
+state 49
 	expr:  expr.'?' expr ':' expr 
 	expr:  expr.'+' expr 
 	expr:  expr.'-' expr 
@@ -800,12 +818,12 @@ state 48
 
 	'|'  shift 33
 	'&'  shift 35
-	.  reduce 19 (src line 128)
+	.  reduce 19 (src line 130)
 
 
-49: shift/reduce conflict (shift 33(0), red'n 20(6)) on '|'
-49: shift/reduce conflict (shift 35(0), red'n 20(6)) on '&'
-state 49
+50: shift/reduce conflict (shift 33(0), red'n 20(6)) on '|'
+50: shift/reduce conflict (shift 35(0), red'n 20(6)) on '&'
+state 50
 	expr:  expr.'?' expr ':' expr 
 	expr:  expr.'+' expr 
 	expr:  expr.'-' expr 
@@ -837,12 +855,12 @@ state 49
 	'%'  shift 26
 	'|'  shift 33
 	'&'  shift 35
-	.  reduce 20 (src line 132)
+	.  reduce 20 (src line 134)
 
 
-50: shift/reduce conflict (shift 33(0), red'n 21(6)) on '|'
-50: shift/reduce conflict (shift 35(0), red'n 21(6)) on '&'
-state 50
+51: shift/reduce conflict (shift 33(0), red'n 21(6)) on '|'
+51: shift/reduce conflict (shift 35(0), red'n 21(6)) on '&'
+state 51
 	expr:  expr.'?' expr ':' expr 
 	expr:  expr.'+' expr 
 	expr:  expr.'-' expr 
@@ -874,12 +892,12 @@ state 50
 	'%'  shift 26
 	'|'  shift 33
 	'&'  shift 35
-	.  reduce 21 (src line 136)
+	.  reduce 21 (src line 138)
 
 
-51: shift/reduce conflict (shift 33(0), red'n 22(7)) on '|'
-51: shift/reduce conflict (shift 35(0), red'n 22(7)) on '&'
-state 51
+52: shift/reduce conflict (shift 33(0), red'n 22(7)) on '|'
+52: shift/reduce conflict (shift 35(0), red'n 22(7)) on '&'
+state 52
 	expr:  expr.'?' expr ':' expr 
 	expr:  expr.'+' expr 
 	expr:  expr.'-' expr 
@@ -905,12 +923,12 @@ state 51
 	'%'  shift 26
 	'|'  shift 33
 	'&'  shift 35
-	.  reduce 22 (src line 140)
+	.  reduce 22 (src line 142)
 
 
-52: shift/reduce conflict (shift 33(0), red'n 23(7)) on '|'
-52: shift/reduce conflict (shift 35(0), red'n 23(7)) on '&'
-state 52
+53: shift/reduce conflict (shift 33(0), red'n 23(7)) on '|'
+53: shift/reduce conflict (shift 35(0), red'n 23(7)) on '&'
+state 53
 	expr:  expr.'?' expr ':' expr 
 	expr:  expr.'+' expr 
 	expr:  expr.'-' expr 
@@ -936,12 +954,12 @@ state 52
 	'%'  shift 26
 	'|'  shift 33
 	'&'  shift 35
-	.  reduce 23 (src line 144)
+	.  reduce 23 (src line 146)
 
 
-53: shift/reduce conflict (shift 33(0), red'n 24(7)) on '|'
-53: shift/reduce conflict (shift 35(0), red'n 24(7)) on '&'
-state 53
+54: shift/reduce conflict (shift 33(0), red'n 24(7)) on '|'
+54: shift/reduce conflict (shift 35(0), red'n 24(7)) on '&'
+state 54
 	expr:  expr.'?' expr ':' expr 
 	expr:  expr.'+' expr 
 	expr:  expr.'-' expr 
@@ -967,12 +985,12 @@ state 53
 	'%'  shift 26
 	'|'  shift 33
 	'&'  shift 35
-	.  reduce 24 (src line 148)
+	.  reduce 24 (src line 150)
 
 
-54: shift/reduce conflict (shift 33(0), red'n 25(7)) on '|'
-54: shift/reduce conflict (shift 35(0), red'n 25(7)) on '&'
-state 54
+55: shift/reduce conflict (shift 33(0), red'n 25(7)) on '|'
+55: shift/reduce conflict (shift 35(0), red'n 25(7)) on '&'
+state 55
 	expr:  expr.'?' expr ':' expr 
 	expr:  expr.'+' expr 
 	expr:  expr.'-' expr 
@@ -998,26 +1016,26 @@ state 54
 	'%'  shift 26
 	'|'  shift 33
 	'&'  shift 35
-	.  reduce 25 (src line 152)
+	.  reduce 25 (src line 154)
 
 
-55: shift/reduce conflict (shift 27(6), red'n 26(0)) on EQEQ
-55: shift/reduce conflict (shift 28(6), red'n 26(0)) on NEQ
-55: shift/reduce conflict (shift 30(7), red'n 26(0)) on GE
-55: shift/reduce conflict (shift 32(7), red'n 26(0)) on LE
-55: shift/reduce conflict (shift 34(3), red'n 26(0)) on OROR
-55: shift/reduce conflict (shift 36(4), red'n 26(0)) on ANDAND
-55: shift/reduce conflict (shift 21(2), red'n 26(0)) on '?'
-55: shift/reduce conflict (shift 29(7), red'n 26(0)) on '>'
-55: shift/reduce conflict (shift 31(7), red'n 26(0)) on '<'
-55: shift/reduce conflict (shift 22(8), red'n 26(0)) on '+'
-55: shift/reduce conflict (shift 23(8), red'n 26(0)) on '-'
-55: shift/reduce conflict (shift 24(9), red'n 26(0)) on '*'
-55: shift/reduce conflict (shift 25(9), red'n 26(0)) on '/'
-55: shift/reduce conflict (shift 26(9), red'n 26(0)) on '%'
-55: shift/reduce conflict (shift 33(0), red'n 26(0)) on '|'
-55: shift/reduce conflict (shift 35(0), red'n 26(0)) on '&'
-state 55
+56: shift/reduce conflict (shift 27(6), red'n 26(0)) on EQEQ
+56: shift/reduce conflict (shift 28(6), red'n 26(0)) on NEQ
+56: shift/reduce conflict (shift 30(7), red'n 26(0)) on GE
+56: shift/reduce conflict (shift 32(7), red'n 26(0)) on LE
+56: shift/reduce conflict (shift 34(3), red'n 26(0)) on OROR
+56: shift/reduce conflict (shift 36(4), red'n 26(0)) on ANDAND
+56: shift/reduce conflict (shift 21(2), red'n 26(0)) on '?'
+56: shift/reduce conflict (shift 29(7), red'n 26(0)) on '>'
+56: shift/reduce conflict (shift 31(7), red'n 26(0)) on '<'
+56: shift/reduce conflict (shift 22(8), red'n 26(0)) on '+'
+56: shift/reduce conflict (shift 23(8), red'n 26(0)) on '-'
+56: shift/reduce conflict (shift 24(9), red'n 26(0)) on '*'
+56: shift/reduce conflict (shift 25(9), red'n 26(0)) on '/'
+56: shift/reduce conflict (shift 26(9), red'n 26(0)) on '%'
+56: shift/reduce conflict (shift 33(0), red'n 26(0)) on '|'
+56: shift/reduce conflict (shift 35(0), red'n 26(0)) on '&'
+state 56
 	expr:  expr.'?' expr ':' expr 
 	expr:  expr.'+' expr 
 	expr:  expr.'-' expr 
@@ -1052,12 +1070,12 @@ state 55
 	'%'  shift 26
 	'|'  shift 33
 	'&'  shift 35
-	.  reduce 26 (src line 156)
+	.  reduce 26 (src line 158)
 
 
-56: shift/reduce conflict (shift 33(0), red'n 27(3)) on '|'
-56: shift/reduce conflict (shift 35(0), red'n 27(3)) on '&'
-state 56
+57: shift/reduce conflict (shift 33(0), red'n 27(3)) on '|'
+57: shift/reduce conflict (shift 35(0), red'n 27(3)) on '&'
+state 57
 	expr:  expr.'?' expr ':' expr 
 	expr:  expr.'+' expr 
 	expr:  expr.'-' expr 
@@ -1090,26 +1108,26 @@ state 56
 	'%'  shift 26
 	'|'  shift 33
 	'&'  shift 35
-	.  reduce 27 (src line 160)
+	.  reduce 27 (src line 162)
 
 
-57: shift/reduce conflict (shift 27(6), red'n 28(0)) on EQEQ
-57: shift/reduce conflict (shift 28(6), red'n 28(0)) on NEQ
-57: shift/reduce conflict (shift 30(7), red'n 28(0)) on GE
-57: shift/reduce conflict (shift 32(7), red'n 28(0)) on LE
-57: shift/reduce conflict (shift 34(3), red'n 28(0)) on OROR
-57: shift/reduce conflict (shift 36(4), red'n 28(0)) on ANDAND
-57: shift/reduce conflict (shift 21(2), red'n 28(0)) on '?'
-57: shift/reduce conflict (shift 29(7), red'n 28(0)) on '>'
-57: shift/reduce conflict (shift 31(7), red'n 28(0)) on '<'
-57: shift/reduce conflict (shift 22(8), red'n 28(0)) on '+'
-57: shift/reduce conflict (shift 23(8), red'n 28(0)) on '-'
-57: shift/reduce conflict (shift 24(9), red'n 28(0)) on '*'
-57: shift/reduce conflict (shift 25(9), red'n 28(0)) on '/'
-57: shift/reduce conflict (shift 26(9), red'n 28(0)) on '%'
-57: shift/reduce conflict (shift 33(0), red'n 28(0)) on '|'
-57: shift/reduce conflict (shift 35(0), red'n 28(0)) on '&'
-state 57
+58: shift/reduce conflict (shift 27(6), red'n 28(0)) on EQEQ
+58: shift/reduce conflict (shift 28(6), red'n 28(0)) on NEQ
+58: shift/reduce conflict (shift 30(7), red'n 28(0)) on GE
+58: shift/reduce conflict (shift 32(7), red'n 28(0)) on LE
+58: shift/reduce conflict (shift 34(3), red'n 28(0)) on OROR
+58: shift/reduce conflict (shift 36(4), red'n 28(0)) on ANDAND
+58: shift/reduce conflict (shift 21(2), red'n 28(0)) on '?'
+58: shift/reduce conflict (shift 29(7), red'n 28(0)) on '>'
+58: shift/reduce conflict (shift 31(7), red'n 28(0)) on '<'
+58: shift/reduce conflict (shift 22(8), red'n 28(0)) on '+'
+58: shift/reduce conflict (shift 23(8), red'n 28(0)) on '-'
+58: shift/reduce conflict (shift 24(9), red'n 28(0)) on '*'
+58: shift/reduce conflict (shift 25(9), red'n 28(0)) on '/'
+58: shift/reduce conflict (shift 26(9), red'n 28(0)) on '%'
+58: shift/reduce conflict (shift 33(0), red'n 28(0)) on '|'
+58: shift/reduce conflict (shift 35(0), red'n 28(0)) on '&'
+state 58
 	expr:  expr.'?' expr ':' expr 
 	expr:  expr.'+' expr 
 	expr:  expr.'-' expr 
@@ -1144,12 +1162,12 @@ state 57
 	'%'  shift 26
 	'|'  shift 33
 	'&'  shift 35
-	.  reduce 28 (src line 164)
+	.  reduce 28 (src line 166)
 
 
-58: shift/reduce conflict (shift 33(0), red'n 29(4)) on '|'
-58: shift/reduce conflict (shift 35(0), red'n 29(4)) on '&'
-state 58
+59: shift/reduce conflict (shift 33(0), red'n 29(4)) on '|'
+59: shift/reduce conflict (shift 35(0), red'n 29(4)) on '&'
+state 59
 	expr:  expr.'?' expr ':' expr 
 	expr:  expr.'+' expr 
 	expr:  expr.'-' expr 
@@ -1181,16 +1199,63 @@ state 58
 	'%'  shift 26
 	'|'  shift 33
 	'&'  shift 35
-	.  reduce 29 (src line 168)
-
-
-state 59
-	expr:  '(' expr ')'.    (14)
-
-	.  reduce 14 (src line 108)
+	.  reduce 29 (src line 170)
 
 
 state 60
+	expr:  IDENT '(' exprs.')' 
+	exprs:  exprs.',' expr 
+
+	','  shift 65
+	')'  shift 64
+	.  error
+
+
+state 61
+	expr:  expr.'?' expr ':' expr 
+	expr:  expr.'+' expr 
+	expr:  expr.'-' expr 
+	expr:  expr.'*' expr 
+	expr:  expr.'/' expr 
+	expr:  expr.'%' expr 
+	expr:  expr.EQEQ expr 
+	expr:  expr.NEQ expr 
+	expr:  expr.'>' expr 
+	expr:  expr.GE expr 
+	expr:  expr.'<' expr 
+	expr:  expr.LE expr 
+	expr:  expr.'|' expr 
+	expr:  expr.OROR expr 
+	expr:  expr.'&' expr 
+	expr:  expr.ANDAND expr 
+	exprs:  expr.    (32)
+
+	EQEQ  shift 27
+	NEQ  shift 28
+	GE  shift 30
+	LE  shift 32
+	OROR  shift 34
+	ANDAND  shift 36
+	'?'  shift 21
+	'>'  shift 29
+	'<'  shift 31
+	'+'  shift 22
+	'-'  shift 23
+	'*'  shift 24
+	'/'  shift 25
+	'%'  shift 26
+	'|'  shift 33
+	'&'  shift 35
+	.  reduce 32 (src line 183)
+
+
+state 62
+	expr:  '(' expr ')'.    (14)
+
+	.  reduce 14 (src line 110)
+
+
+state 63
 	expr:  expr '?' expr ':'.expr 
 
 	IDENT  shift 10
@@ -1202,11 +1267,31 @@ state 60
 	'('  shift 16
 	.  error
 
-	expr  goto 61
+	expr  goto 66
 
-61: shift/reduce conflict (shift 33(0), red'n 13(2)) on '|'
-61: shift/reduce conflict (shift 35(0), red'n 13(2)) on '&'
-state 61
+state 64
+	expr:  IDENT '(' exprs ')'.    (30)
+
+	.  reduce 30 (src line 174)
+
+
+state 65
+	exprs:  exprs ','.expr 
+
+	IDENT  shift 10
+	NUMBER  shift 11
+	STRING  shift 15
+	'-'  shift 12
+	'!'  shift 13
+	'^'  shift 14
+	'('  shift 16
+	.  error
+
+	expr  goto 67
+
+66: shift/reduce conflict (shift 33(0), red'n 13(2)) on '|'
+66: shift/reduce conflict (shift 35(0), red'n 13(2)) on '&'
+state 66
 	expr:  expr.'?' expr ':' expr 
 	expr:  expr '?' expr ':' expr.    (13)
 	expr:  expr.'+' expr 
@@ -1241,18 +1326,56 @@ state 61
 	'%'  shift 26
 	'|'  shift 33
 	'&'  shift 35
-	.  reduce 13 (src line 104)
+	.  reduce 13 (src line 106)
 
 
-37 terminals, 8 nonterminals
-36 grammar rules, 62/8000 states
+state 67
+	expr:  expr.'?' expr ':' expr 
+	expr:  expr.'+' expr 
+	expr:  expr.'-' expr 
+	expr:  expr.'*' expr 
+	expr:  expr.'/' expr 
+	expr:  expr.'%' expr 
+	expr:  expr.EQEQ expr 
+	expr:  expr.NEQ expr 
+	expr:  expr.'>' expr 
+	expr:  expr.GE expr 
+	expr:  expr.'<' expr 
+	expr:  expr.LE expr 
+	expr:  expr.'|' expr 
+	expr:  expr.OROR expr 
+	expr:  expr.'&' expr 
+	expr:  expr.ANDAND expr 
+	exprs:  exprs ',' expr.    (33)
+
+	EQEQ  shift 27
+	NEQ  shift 28
+	GE  shift 30
+	LE  shift 32
+	OROR  shift 34
+	ANDAND  shift 36
+	'?'  shift 21
+	'>'  shift 29
+	'<'  shift 31
+	'+'  shift 22
+	'-'  shift 23
+	'*'  shift 24
+	'/'  shift 25
+	'%'  shift 26
+	'|'  shift 33
+	'&'  shift 35
+	.  reduce 33 (src line 187)
+
+
+37 terminals, 9 nonterminals
+40 grammar rules, 68/2000 states
 66 shift/reduce, 0 reduce/reduce conflicts reported
-57 working sets used
-memory: parser 35/120000
-46 extra closures
-390 shift entries, 5 exceptions
-34 goto entries
+58 working sets used
+memory: parser 38/30000
+49 extra closures
+439 shift entries, 5 exceptions
+37 goto entries
 2 entries saved by goto default
-Optimizer space used: output 249/120000
-249 table entries, 78 zero
-maximum spread: 37, maximum offset: 60
+Optimizer space used: output 251/30000
+251 table entries, 74 zero
+maximum spread: 37, maximum offset: 65
diff --git a/vendor/github.com/mattn/kinako/vm/vm.go b/vendor/github.com/mattn/kinako/vm/vm.go
index cabbc52..efbdb8c 100644
--- a/vendor/github.com/mattn/kinako/vm/vm.go
+++ b/vendor/github.com/mattn/kinako/vm/vm.go
@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"math"
+	"os"
 	"reflect"
 	"strconv"
 	"strings"
@@ -39,14 +40,6 @@ func (e *Error) Error() string {
 // Func is function interface to reflect functions internaly.
 type Func func(args ...reflect.Value) (reflect.Value, error)
 
-func (f Func) String() string {
-	return fmt.Sprintf("[Func: %p]", f)
-}
-
-func ToFunc(f Func) reflect.Value {
-	return reflect.ValueOf(f)
-}
-
 // Run executes statements in the specified environment.
 func Run(stmts []ast.Stmt, env *Env) (reflect.Value, error) {
 	rv := NilValue
@@ -386,6 +379,80 @@ func invokeExpr(expr ast.Expr, env *Env) (reflect.Value, error) {
 		default:
 			return NilValue, errors.New("Unknown operator")
 		}
+	case *ast.CallExpr:
+		f, err := env.Get(e.Name)
+		if err != nil {
+			return f, err
+		}
+
+		args := []reflect.Value{}
+		for i, expr := range e.SubExprs {
+			arg, err := invokeExpr(expr, env)
+			if err != nil {
+				return arg, err
+			}
+
+			if i < f.Type().NumIn() {
+				if !f.Type().IsVariadic() {
+					it := f.Type().In(i)
+					if arg.Kind().String() == "unsafe.Pointer" {
+						arg = reflect.New(it).Elem()
+					}
+					if arg.Kind() != it.Kind() && arg.IsValid() && arg.Type().ConvertibleTo(it) {
+						arg = arg.Convert(it)
+					} else if arg.Kind() == reflect.Func {
+						if _, isFunc := arg.Interface().(Func); isFunc {
+							rfunc := arg
+							arg = reflect.MakeFunc(it, func(args []reflect.Value) []reflect.Value {
+								for i := range args {
+									args[i] = reflect.ValueOf(args[i])
+								}
+								return rfunc.Call(args)[:it.NumOut()]
+							})
+						}
+					} else if !arg.IsValid() {
+						arg = reflect.Zero(it)
+					}
+				}
+			}
+			if !arg.IsValid() {
+				arg = NilValue
+			}
+
+			args = append(args, arg)
+		}
+		ret := NilValue
+		fnc := func() {
+			defer func() {
+				if os.Getenv("KINAKO_DEBUG") == "" {
+					if ex := recover(); ex != nil {
+						if e, ok := ex.(error); ok {
+							err = e
+						} else {
+							err = errors.New(fmt.Sprint(ex))
+						}
+					}
+				}
+			}()
+			if f.Kind() == reflect.Interface {
+				f = f.Elem()
+			}
+			rets := f.Call(args)
+			if f.Type().NumOut() == 1 {
+				ret = rets[0]
+			} else {
+				var result []interface{}
+				for _, r := range rets {
+					result = append(result, r.Interface())
+				}
+				ret = reflect.ValueOf(result)
+			}
+		}
+		fnc()
+		if err != nil {
+			return ret, err
+		}
+		return ret, nil
 	case *ast.TernaryOpExpr:
 		rv, err := invokeExpr(e.Expr, env)
 		if err != nil {
diff --git a/vendor/github.com/mattn/kinako/vm/vm_test.go b/vendor/github.com/mattn/kinako/vm/vm_test.go
new file mode 100644
index 0000000..929d23f
--- /dev/null
+++ b/vendor/github.com/mattn/kinako/vm/vm_test.go
@@ -0,0 +1,54 @@
+package vm
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestExecute(t *testing.T) {
+	e := NewEnv()
+	e.Define("foo", int64(1))
+	e.Define("bar", int64(2))
+	e.Define("baz", int64(3))
+
+	tests := []struct {
+		input string
+		want  interface{}
+	}{
+		{
+			input: "foo+bar",
+			want:  int64(3),
+		},
+		{
+			input: "foo-bar",
+			want:  int64(-1),
+		},
+		{
+			input: "foo*bar",
+			want:  int64(2),
+		},
+		{
+			input: "foo/bar",
+			want:  float64(0.5),
+		},
+		{
+			input: "baz*(foo+bar)",
+			want:  int64(9),
+		},
+		{
+			input: "baz > 2 ? foo : bar",
+			want:  int64(1),
+		},
+	}
+
+	for _, tt := range tests {
+		r, err := e.Execute(tt.input)
+		if err != nil {
+			t.Fatal(err)
+		}
+		got := r.Interface()
+		if !reflect.DeepEqual(got, tt.want) {
+			t.Fatalf("want %v, but %v:", tt.want, got)
+		}
+	}
+}