func compile(tree *ast.Node, sep []rune) (m match.Matcher, err error) {
switch tree.Kind {
case ast.KindAnyOf:
// todo this could be faster on pattern_alternatives_combine_lite (see glob_test.go)
if n := minimizeTree(tree); n != nil {
return compile(n, sep)
}
matchers, err := compileTreeChildren(tree, sep)
if err != nil {
return nil, err
}
return match.NewAnyOf(matchers...), nil
case ast.KindPattern:
if len(tree.Children) == 0 {
return match.NewNothing(), nil
}
matchers, err := compileTreeChildren(tree, sep)
if err != nil {
return nil, err
}
m, err = compileMatchers(minimizeMatchers(matchers))
if err != nil {
return nil, err
}
case ast.KindAny:
m = match.NewAny(sep)
case ast.KindSuper:
m = match.NewSuper()
case ast.KindSingle:
m = match.NewSingle(sep)
case ast.KindNothing:
m = match.NewNothing()
case ast.KindList:
l := tree.Value.(ast.List)
m = match.NewList([]rune(l.Chars), l.Not)
case ast.KindRange:
r := tree.Value.(ast.Range)
m = match.NewRange(r.Lo, r.Hi, r.Not)
case ast.KindText:
t := tree.Value.(ast.Text)
m = match.NewText(t.Text)
default:
return nil, fmt.Errorf("could not compile tree: unknown node type")
}
return optimizeMatcher(m), nil
}
func doAnyOf(n *nodeAnyOf, s []rune) (match.Matcher, error) {
var matchers []match.Matcher
for _, desc := range n.children() {
if desc == nil {
matchers = append(matchers, match.NewNothing())
continue
}
m, err := do(desc, s)
if err != nil {
return nil, err
}
matchers = append(matchers, optimize(m))
}
return match.NewAnyOf(matchers...), nil
}
func do(leaf node, s []rune) (m match.Matcher, err error) {
switch n := leaf.(type) {
case *nodeAnyOf:
// todo this could be faster on pattern_alternatives_combine_lite
if n := minimizeAnyOf(n.children()); n != nil {
return do(n, s)
}
var matchers []match.Matcher
for _, desc := range n.children() {
if desc == nil {
matchers = append(matchers, match.NewNothing())
continue
}
m, err := do(desc, s)
if err != nil {
return nil, err
}
matchers = append(matchers, optimize(m))
}
return match.NewAnyOf(matchers...), nil
case *nodePattern:
nodes := leaf.children()
if len(nodes) == 0 {
return match.NewNothing(), nil
}
var matchers []match.Matcher
for _, desc := range nodes {
m, err := do(desc, s)
if err != nil {
return nil, err
}
matchers = append(matchers, optimize(m))
}
m, err = compileMatchers(minimizeMatchers(matchers))
if err != nil {
return nil, err
}
case *nodeList:
m = match.NewList([]rune(n.chars), n.not)
case *nodeRange:
m = match.NewRange(n.lo, n.hi, n.not)
case *nodeAny:
m = match.NewAny(s)
case *nodeSuper:
m = match.NewSuper()
case *nodeSingle:
m = match.NewSingle(s)
case *nodeText:
m = match.NewText(n.text)
default:
return nil, fmt.Errorf("could not compile tree: unknown node type")
}
return optimize(m), nil
}
func TestCompiler(t *testing.T) {
for id, test := range []struct {
ast *ast.Node
result match.Matcher
sep []rune
}{
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindText, ast.Text{"abc"}),
),
result: match.NewText("abc"),
},
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindAny, nil),
),
sep: separators,
result: match.NewAny(separators),
},
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindAny, nil),
),
result: match.NewSuper(),
},
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindSuper, nil),
),
result: match.NewSuper(),
},
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindSingle, nil),
),
sep: separators,
result: match.NewSingle(separators),
},
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindRange, ast.Range{
Lo: 'a',
Hi: 'z',
Not: true,
}),
),
result: match.NewRange('a', 'z', true),
},
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindList, ast.List{
Chars: "abc",
Not: true,
}),
),
result: match.NewList([]rune{'a', 'b', 'c'}, true),
},
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindAny, nil),
ast.NewNode(ast.KindSingle, nil),
ast.NewNode(ast.KindSingle, nil),
ast.NewNode(ast.KindSingle, nil),
),
sep: separators,
result: match.EveryOf{Matchers: match.Matchers{
match.NewMin(3),
match.NewContains(string(separators), true),
}},
},
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindAny, nil),
ast.NewNode(ast.KindSingle, nil),
ast.NewNode(ast.KindSingle, nil),
ast.NewNode(ast.KindSingle, nil),
),
result: match.NewMin(3),
},
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindAny, nil),
ast.NewNode(ast.KindText, ast.Text{"abc"}),
ast.NewNode(ast.KindSingle, nil),
),
sep: separators,
result: match.NewBTree(
match.NewRow(
4,
match.Matchers{
match.NewText("abc"),
match.NewSingle(separators),
}...,
),
match.NewAny(separators),
nil,
),
},
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindText, ast.Text{"/"}),
ast.NewNode(ast.KindAnyOf, nil,
ast.NewNode(ast.KindText, ast.Text{"z"}),
ast.NewNode(ast.KindText, ast.Text{"ab"}),
),
ast.NewNode(ast.KindSuper, nil),
),
sep: separators,
result: match.NewBTree(
match.NewText("/"),
nil,
match.NewBTree(
match.NewAnyOf(match.NewText("z"), match.NewText("ab")),
nil,
match.NewSuper(),
),
),
},
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindSuper, nil),
ast.NewNode(ast.KindSingle, nil),
ast.NewNode(ast.KindText, ast.Text{"abc"}),
ast.NewNode(ast.KindSingle, nil),
),
sep: separators,
result: match.NewBTree(
match.NewRow(
5,
match.Matchers{
match.NewSingle(separators),
match.NewText("abc"),
match.NewSingle(separators),
}...,
),
match.NewSuper(),
nil,
),
},
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindAny, nil),
ast.NewNode(ast.KindText, ast.Text{"abc"}),
),
result: match.NewSuffix("abc"),
},
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindText, ast.Text{"abc"}),
ast.NewNode(ast.KindAny, nil),
),
result: match.NewPrefix("abc"),
},
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindText, ast.Text{"abc"}),
ast.NewNode(ast.KindAny, nil),
ast.NewNode(ast.KindText, ast.Text{"def"}),
),
result: match.NewPrefixSuffix("abc", "def"),
},
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindAny, nil),
ast.NewNode(ast.KindAny, nil),
ast.NewNode(ast.KindAny, nil),
ast.NewNode(ast.KindText, ast.Text{"abc"}),
ast.NewNode(ast.KindAny, nil),
ast.NewNode(ast.KindAny, nil),
),
result: match.NewContains("abc", false),
},
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindAny, nil),
ast.NewNode(ast.KindAny, nil),
ast.NewNode(ast.KindAny, nil),
ast.NewNode(ast.KindText, ast.Text{"abc"}),
ast.NewNode(ast.KindAny, nil),
ast.NewNode(ast.KindAny, nil),
),
sep: separators,
result: match.NewBTree(
match.NewText("abc"),
match.NewAny(separators),
match.NewAny(separators),
),
},
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindSuper, nil),
ast.NewNode(ast.KindSingle, nil),
ast.NewNode(ast.KindText, ast.Text{"abc"}),
ast.NewNode(ast.KindSuper, nil),
ast.NewNode(ast.KindSingle, nil),
),
result: match.NewBTree(
match.NewText("abc"),
match.NewMin(1),
match.NewMin(1),
),
},
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindText, ast.Text{"abc"}),
),
result: match.NewText("abc"),
},
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindAnyOf, nil,
ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindAnyOf, nil,
ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindText, ast.Text{"abc"}),
),
),
),
),
),
result: match.NewText("abc"),
},
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindAnyOf, nil,
ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindText, ast.Text{"abc"}),
ast.NewNode(ast.KindSingle, nil),
),
ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindText, ast.Text{"abc"}),
ast.NewNode(ast.KindList, ast.List{Chars: "def"}),
),
ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindText, ast.Text{"abc"}),
),
ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindText, ast.Text{"abc"}),
),
),
),
result: match.NewBTree(
match.NewText("abc"),
nil,
match.AnyOf{Matchers: match.Matchers{
match.NewSingle(nil),
match.NewList([]rune{'d', 'e', 'f'}, false),
match.NewNothing(),
}},
),
},
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindRange, ast.Range{Lo: 'a', Hi: 'z'}),
ast.NewNode(ast.KindRange, ast.Range{Lo: 'a', Hi: 'x', Not: true}),
ast.NewNode(ast.KindAny, nil),
),
result: match.NewBTree(
match.NewRow(
2,
match.Matchers{
match.NewRange('a', 'z', false),
match.NewRange('a', 'x', true),
}...,
),
nil,
match.NewSuper(),
),
},
{
ast: ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindAnyOf, nil,
ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindText, ast.Text{"abc"}),
ast.NewNode(ast.KindList, ast.List{Chars: "abc"}),
ast.NewNode(ast.KindText, ast.Text{"ghi"}),
),
ast.NewNode(ast.KindPattern, nil,
ast.NewNode(ast.KindText, ast.Text{"abc"}),
ast.NewNode(ast.KindList, ast.List{Chars: "def"}),
ast.NewNode(ast.KindText, ast.Text{"ghi"}),
),
),
),
result: match.NewRow(
7,
match.Matchers{
match.NewText("abc"),
match.AnyOf{Matchers: match.Matchers{
match.NewList([]rune{'a', 'b', 'c'}, false),
match.NewList([]rune{'d', 'e', 'f'}, false),
}},
match.NewText("ghi"),
}...,
),
},
} {
m, err := Compile(test.ast, test.sep)
if err != nil {
t.Errorf("compilation error: %s", err)
continue
}
if !reflect.DeepEqual(m, test.result) {
t.Errorf("[%d] Compile():\nexp: %#v\nact: %#v\n\ngraphviz:\nexp:\n%s\nact:\n%s\n", id, test.result, m, debug.Graphviz("", test.result.(match.Matcher)), debug.Graphviz("", m.(match.Matcher)))
continue
}
}
}