expressions working

Signed-off-by: Casey Lee <cplee@nektos.com>

vendor/gopkg.in/sourcemap.v1/.travis.yml

@@ -0,0 +1,16 @@
+sudo: false
+language: go
+
+go:
+  - 1.6
+  - 1.7
+  - tip
+
+matrix:
+  allow_failures:
+    - go: tip
+
+install:
+  - mkdir -p $HOME/gopath/src/gopkg.in
+  - mv $HOME/gopath/src/github.com/go-sourcemap/sourcemap $HOME/gopath/src/gopkg.in/sourcemap.v1
+  - cd $HOME/gopath/src/gopkg.in/sourcemap.v1

vendor/gopkg.in/sourcemap.v1/LICENSE

@@ -0,0 +1,25 @@
+Copyright (c) 2016 The github.com/go-sourcemap/sourcemap Contributors.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/gopkg.in/sourcemap.v1/Makefile

@@ -0,0 +1,4 @@
+all:
+	go test ./...
+	go test ./... -short -race
+	go vet

vendor/gopkg.in/sourcemap.v1/README.md

@@ -0,0 +1,35 @@
+# Source Maps consumer for Golang [![Build Status](https://travis-ci.org/go-sourcemap/sourcemap.svg?branch=v1)](https://travis-ci.org/go-sourcemap/sourcemap)
+
+## Installation
+
+Install:
+
+    go get gopkg.in/sourcemap.v1
+
+## Quickstart
+
+```go
+func ExampleParse() {
+	mapURL := "http://code.jquery.com/jquery-2.0.3.min.map"
+	resp, err := http.Get(mapURL)
+	if err != nil {
+		panic(err)
+	}
+	defer resp.Body.Close()
+
+	b, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		panic(err)
+	}
+
+	smap, err := sourcemap.Parse(mapURL, b)
+	if err != nil {
+		panic(err)
+	}
+
+	line, column := 5, 6789
+	file, fn, line, col, ok := smap.Source(line, column)
+	fmt.Println(file, fn, line, col, ok)
+	// Output: http://code.jquery.com/jquery-2.0.3.js apply 4360 27 true
+}
+```

vendor/gopkg.in/sourcemap.v1/base64vlq/base64_vlq.go

@@ -0,0 +1,92 @@
+package base64vlq
+
+import (
+	"io"
+)
+
+const encodeStd = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
+
+const (
+	vlqBaseShift       = 5
+	vlqBase            = 1 << vlqBaseShift
+	vlqBaseMask        = vlqBase - 1
+	vlqSignBit         = 1
+	vlqContinuationBit = vlqBase
+)
+
+var decodeMap [256]byte
+
+func init() {
+	for i := 0; i < len(encodeStd); i++ {
+		decodeMap[encodeStd[i]] = byte(i)
+	}
+}
+
+func toVLQSigned(n int) int {
+	if n < 0 {
+		return -n<<1 + 1
+	}
+	return n << 1
+}
+
+func fromVLQSigned(n int) int {
+	isNeg := n&vlqSignBit != 0
+	n >>= 1
+	if isNeg {
+		return -n
+	}
+	return n
+}
+
+type Encoder struct {
+	w io.ByteWriter
+}
+
+func NewEncoder(w io.ByteWriter) *Encoder {
+	return &Encoder{
+		w: w,
+	}
+}
+
+func (enc Encoder) Encode(n int) error {
+	n = toVLQSigned(n)
+	for digit := vlqContinuationBit; digit&vlqContinuationBit != 0; {
+		digit = n & vlqBaseMask
+		n >>= vlqBaseShift
+		if n > 0 {
+			digit |= vlqContinuationBit
+		}
+
+		err := enc.w.WriteByte(encodeStd[digit])
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+type Decoder struct {
+	r io.ByteReader
+}
+
+func NewDecoder(r io.ByteReader) *Decoder {
+	return &Decoder{
+		r: r,
+	}
+}
+
+func (dec Decoder) Decode() (n int, err error) {
+	shift := uint(0)
+	for continuation := true; continuation; {
+		c, err := dec.r.ReadByte()
+		if err != nil {
+			return 0, err
+		}
+
+		c = decodeMap[c]
+		continuation = c&vlqContinuationBit != 0
+		n += int(c&vlqBaseMask) << shift
+		shift += vlqBaseShift
+	}
+	return fromVLQSigned(n), nil
+}

vendor/gopkg.in/sourcemap.v1/consumer.go

@@ -0,0 +1,134 @@
+package sourcemap
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/url"
+	"path"
+	"sort"
+	"strconv"
+)
+
+type Consumer struct {
+	sourceRootURL *url.URL
+	smap          *sourceMap
+	mappings      []mapping
+}
+
+func Parse(mapURL string, b []byte) (*Consumer, error) {
+	smap := new(sourceMap)
+	err := json.Unmarshal(b, smap)
+	if err != nil {
+		return nil, err
+	}
+
+	if smap.Version != 3 {
+		return nil, fmt.Errorf(
+			"sourcemap: got version=%d, but only 3rd version is supported",
+			smap.Version,
+		)
+	}
+
+	var sourceRootURL *url.URL
+	if smap.SourceRoot != "" {
+		u, err := url.Parse(smap.SourceRoot)
+		if err != nil {
+			return nil, err
+		}
+		if u.IsAbs() {
+			sourceRootURL = u
+		}
+	} else if mapURL != "" {
+		u, err := url.Parse(mapURL)
+		if err != nil {
+			return nil, err
+		}
+		if u.IsAbs() {
+			u.Path = path.Dir(u.Path)
+			sourceRootURL = u
+		}
+	}
+
+	mappings, err := parseMappings(smap.Mappings)
+	if err != nil {
+		return nil, err
+	}
+	// Free memory.
+	smap.Mappings = ""
+
+	return &Consumer{
+		sourceRootURL: sourceRootURL,
+		smap:          smap,
+		mappings:      mappings,
+	}, nil
+}
+
+func (c *Consumer) File() string {
+	return c.smap.File
+}
+
+func (c *Consumer) Source(genLine, genCol int) (source, name string, line, col int, ok bool) {
+	i := sort.Search(len(c.mappings), func(i int) bool {
+		m := &c.mappings[i]
+		if m.genLine == genLine {
+			return m.genCol >= genCol
+		}
+		return m.genLine >= genLine
+	})
+
+	// Mapping not found.
+	if i == len(c.mappings) {
+		return
+	}
+
+	match := &c.mappings[i]
+
+	// Fuzzy match.
+	if match.genLine > genLine || match.genCol > genCol {
+		if i == 0 {
+			return
+		}
+		match = &c.mappings[i-1]
+	}
+
+	if match.sourcesInd >= 0 {
+		source = c.absSource(c.smap.Sources[match.sourcesInd])
+	}
+	if match.namesInd >= 0 {
+		v := c.smap.Names[match.namesInd]
+		switch v := v.(type) {
+		case string:
+			name = v
+		case float64:
+			name = strconv.FormatFloat(v, 'f', -1, 64)
+		default:
+			name = fmt.Sprint(v)
+		}
+	}
+	line = match.sourceLine
+	col = match.sourceCol
+	ok = true
+	return
+}
+
+func (c *Consumer) absSource(source string) string {
+	if path.IsAbs(source) {
+		return source
+	}
+
+	if u, err := url.Parse(source); err == nil && u.IsAbs() {
+		return source
+	}
+
+	if c.sourceRootURL != nil {
+		u := *c.sourceRootURL
+		u.Path = path.Join(c.sourceRootURL.Path, source)
+		return u.String()
+	}
+
+	if c.smap.SourceRoot != "" {
+		return path.Join(c.smap.SourceRoot, source)
+	}
+
+	return source
+}

vendor/gopkg.in/sourcemap.v1/sourcemap.go

@@ -0,0 +1,157 @@
+package sourcemap // import "gopkg.in/sourcemap.v1"
+
+import (
+	"io"
+	"strings"
+
+	"gopkg.in/sourcemap.v1/base64vlq"
+)
+
+type fn func(m *mappings) (fn, error)
+
+type sourceMap struct {
+	Version    int           `json:"version"`
+	File       string        `json:"file"`
+	SourceRoot string        `json:"sourceRoot"`
+	Sources    []string      `json:"sources"`
+	Names      []interface{} `json:"names"`
+	Mappings   string        `json:"mappings"`
+}
+
+type mapping struct {
+	genLine    int
+	genCol     int
+	sourcesInd int
+	sourceLine int
+	sourceCol  int
+	namesInd   int
+}
+
+type mappings struct {
+	rd  *strings.Reader
+	dec *base64vlq.Decoder
+
+	hasName bool
+	value   mapping
+
+	values []mapping
+}
+
+func parseMappings(s string) ([]mapping, error) {
+	rd := strings.NewReader(s)
+	m := &mappings{
+		rd:  rd,
+		dec: base64vlq.NewDecoder(rd),
+	}
+	m.value.genLine = 1
+	m.value.sourceLine = 1
+
+	err := m.parse()
+	if err != nil {
+		return nil, err
+	}
+	return m.values, nil
+}
+
+func (m *mappings) parse() error {
+	next := parseGenCol
+	for {
+		c, err := m.rd.ReadByte()
+		if err == io.EOF {
+			m.pushValue()
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+
+		switch c {
+		case ',':
+			m.pushValue()
+			next = parseGenCol
+		case ';':
+			m.pushValue()
+
+			m.value.genLine++
+			m.value.genCol = 0
+
+			next = parseGenCol
+		default:
+			err := m.rd.UnreadByte()
+			if err != nil {
+				return err
+			}
+
+			next, err = next(m)
+			if err != nil {
+				return err
+			}
+		}
+	}
+}
+
+func parseGenCol(m *mappings) (fn, error) {
+	n, err := m.dec.Decode()
+	if err != nil {
+		return nil, err
+	}
+	m.value.genCol += n
+	return parseSourcesInd, nil
+}
+
+func parseSourcesInd(m *mappings) (fn, error) {
+	n, err := m.dec.Decode()
+	if err != nil {
+		return nil, err
+	}
+	m.value.sourcesInd += n
+	return parseSourceLine, nil
+}
+
+func parseSourceLine(m *mappings) (fn, error) {
+	n, err := m.dec.Decode()
+	if err != nil {
+		return nil, err
+	}
+	m.value.sourceLine += n
+	return parseSourceCol, nil
+}
+
+func parseSourceCol(m *mappings) (fn, error) {
+	n, err := m.dec.Decode()
+	if err != nil {
+		return nil, err
+	}
+	m.value.sourceCol += n
+	return parseNamesInd, nil
+}
+
+func parseNamesInd(m *mappings) (fn, error) {
+	n, err := m.dec.Decode()
+	if err != nil {
+		return nil, err
+	}
+	m.hasName = true
+	m.value.namesInd += n
+	return parseGenCol, nil
+}
+
+func (m *mappings) pushValue() {
+	if m.value.sourceLine == 1 && m.value.sourceCol == 0 {
+		return
+	}
+
+	if m.hasName {
+		m.values = append(m.values, m.value)
+		m.hasName = false
+	} else {
+		m.values = append(m.values, mapping{
+			genLine:    m.value.genLine,
+			genCol:     m.value.genCol,
+			sourcesInd: m.value.sourcesInd,
+			sourceLine: m.value.sourceLine,
+			sourceCol:  m.value.sourceCol,
+			namesInd:   -1,
+		})
+	}
+}