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Refactoring: move query tree to deb package.

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This commit is contained in:
Andrey Smirnov
2014-07-11 00:09:31 +04:00
parent eef49516ef
commit ede5449440
3 changed files with 29 additions and 33 deletions
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24
query/syntax.go
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@@ -14,7 +14,7 @@ type parser struct {
err error // error stored while parsing
}
func parse(input *lexer) (PackageQuery, error) {
func parse(input *lexer) (deb.PackageQuery, error) {
p := &parser{
name: input.name,
input: input,
@@ -27,7 +27,7 @@ func parse(input *lexer) (PackageQuery, error) {
}
// Entry into parser
func (p *parser) parse() PackageQuery {
func (p *parser) parse() deb.PackageQuery {
defer func() {
if r := recover(); r != nil {
p.err = fmt.Errorf("parsing failed: %s", r)
@@ -42,36 +42,36 @@ func (p *parser) parse() PackageQuery {
}
// Query := A | A '|' Query
func (p *parser) Query() PackageQuery {
func (p *parser) Query() deb.PackageQuery {
q := p.A()
if p.input.Current().typ == itemOr {
p.input.Consume()
return &OrQuery{L: q, R: p.Query()}
return &deb.OrQuery{L: q, R: p.Query()}
}
return q
}
// A := B | B ',' A
func (p *parser) A() PackageQuery {
func (p *parser) A() deb.PackageQuery {
q := p.B()
if p.input.Current().typ == itemAnd {
p.input.Consume()
return &AndQuery{L: q, R: p.A()}
return &deb.AndQuery{L: q, R: p.A()}
}
return q
}
// B := C | '!' B
func (p *parser) B() PackageQuery {
func (p *parser) B() deb.PackageQuery {
if p.input.Current().typ == itemNot {
p.input.Consume()
return &NotQuery{Q: p.B()}
return &deb.NotQuery{Q: p.B()}
}
return p.C()
}
// C := '(' Query ')' | D
func (p *parser) C() PackageQuery {
func (p *parser) C() deb.PackageQuery {
if p.input.Current().typ == itemLeftParen {
p.input.Consume()
q := p.Query()
@@ -108,7 +108,7 @@ func operatorToRelation(operator itemType) int {
// D := <field> <condition>
// field := <package-name> | <field> | $special_field
func (p *parser) D() PackageQuery {
func (p *parser) D() deb.PackageQuery {
if p.input.Current().typ != itemString {
panic(fmt.Sprintf("unexpected token %s: expecting field or package name", p.input.Current()))
}
@@ -121,11 +121,11 @@ func (p *parser) D() PackageQuery {
r, _ := utf8.DecodeRuneInString(field)
if strings.HasPrefix(field, "$") || unicode.IsUpper(r) {
// special field or regular field
return &FieldQuery{Field: field, Relation: operatorToRelation(operator), Value: value}
return &deb.FieldQuery{Field: field, Relation: operatorToRelation(operator), Value: value}
}
// regular dependency-like query
return &DependencyQuery{Dep: deb.Dependency{Pkg: field, Relation: operatorToRelation(operator), Version: value}}
return &deb.DependencyQuery{Dep: deb.Dependency{Pkg: field, Relation: operatorToRelation(operator), Version: value}}
}
// condition := '(' <operator> value ')' |