119 lines
2.1 KiB
Go
119 lines
2.1 KiB
Go
package treerack
|
|
|
|
type charParser struct {
|
|
name string
|
|
id int
|
|
not bool
|
|
chars []rune
|
|
ranges [][]rune
|
|
includedBy []int
|
|
}
|
|
|
|
func newChar(
|
|
name string,
|
|
not bool,
|
|
chars []rune,
|
|
ranges [][]rune,
|
|
) *charParser {
|
|
return &charParser{
|
|
name: name,
|
|
not: not,
|
|
chars: chars,
|
|
ranges: ranges,
|
|
}
|
|
}
|
|
|
|
func (p *charParser) nodeName() string { return p.name }
|
|
func (p *charParser) nodeID() int { return p.id }
|
|
func (p *charParser) setID(id int) { p.id = id }
|
|
func (p *charParser) commitType() CommitType { return Alias }
|
|
|
|
func (p *charParser) init(r *registry) error { return nil }
|
|
|
|
func (p *charParser) setIncludedBy(r *registry, includedBy int, parsers *idSet) error {
|
|
p.includedBy = appendIfMissing(p.includedBy, includedBy)
|
|
return nil
|
|
}
|
|
|
|
func (p *charParser) parser(r *registry, parsers *idSet) (parser, error) {
|
|
if parsers.has(p.id) {
|
|
panic(cannotIncludeParsers(p.name))
|
|
}
|
|
|
|
if _, ok := r.parser(p.name); ok {
|
|
return p, nil
|
|
}
|
|
|
|
r.setParser(p)
|
|
return p, nil
|
|
}
|
|
|
|
func (p *charParser) builder() builder {
|
|
return p
|
|
}
|
|
|
|
func (p *charParser) match(t rune) bool {
|
|
for _, ci := range p.chars {
|
|
if ci == t {
|
|
return !p.not
|
|
}
|
|
}
|
|
|
|
for _, ri := range p.ranges {
|
|
if t >= ri[0] && t <= ri[1] {
|
|
return !p.not
|
|
}
|
|
}
|
|
|
|
return p.not
|
|
}
|
|
|
|
func (p *charParser) matchBuild(t rune) bool {
|
|
for _, ci := range p.chars {
|
|
if ci == t {
|
|
return !p.not
|
|
}
|
|
}
|
|
|
|
for _, ri := range p.ranges {
|
|
if t >= ri[0] && t <= ri[1] {
|
|
return !p.not
|
|
}
|
|
}
|
|
|
|
return p.not
|
|
}
|
|
|
|
func (p *charParser) parse(t Trace, c *context) {
|
|
// t = t.Extend(p.name)
|
|
// t.Out1("parsing", c.offset)
|
|
|
|
if tok, ok := c.token(); !ok || !p.match(tok) {
|
|
// t.Out1("fail")
|
|
c.fail(c.offset)
|
|
return
|
|
}
|
|
|
|
// t.Out1("success")
|
|
c.success(c.offset + 1)
|
|
for _, includedBy := range p.includedBy {
|
|
c.store.setMatch(c.offset, includedBy, c.offset+1)
|
|
}
|
|
}
|
|
|
|
func (p *charParser) build(c *context) ([]*Node, bool) {
|
|
// TODO: how to remove this check
|
|
t, ok := c.token()
|
|
if !ok {
|
|
panic("damaged parser context")
|
|
}
|
|
|
|
if !p.matchBuild(t) {
|
|
return nil, false
|
|
}
|
|
|
|
// always alias
|
|
c.offset++
|
|
return nil, true
|
|
}
|