107 lines
1.9 KiB
Go
107 lines
1.9 KiB
Go
package parse
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type charParser struct {
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name string
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commit CommitType
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not bool
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chars []rune
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ranges [][]rune
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includedBy []parser
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}
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func newChar(
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name string,
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ct CommitType,
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not bool,
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chars []rune,
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ranges [][]rune,
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) *charParser {
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return &charParser{
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name: name,
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commit: ct,
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not: not,
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chars: chars,
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ranges: ranges,
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}
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}
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func (p *charParser) nodeName() string { return p.name }
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func (p *charParser) parser(r *registry, path []string) (parser, error) {
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if stringsContain(path, p.name) {
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panic(cannotIncludeParsers(p.name))
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}
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if _, ok := r.parser(p.name); ok {
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return p, nil
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}
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r.setParser(p)
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return p, nil
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}
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func (p *charParser) commitType() CommitType {
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return p.commit
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}
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func (p *charParser) setIncludedBy(includedBy parser, path []string) {
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if stringsContain(path, p.name) {
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panic(cannotIncludeParsers(p.name))
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}
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p.includedBy = append(p.includedBy, includedBy)
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}
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func (p *charParser) cacheIncluded(*context, *Node) {
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panic(cannotIncludeParsers(p.name))
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}
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func (p *charParser) match(t rune) bool {
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for _, ci := range p.chars {
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if ci == t {
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return !p.not
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}
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}
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for _, ri := range p.ranges {
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if t >= ri[0] && t <= ri[1] {
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return !p.not
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}
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}
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return p.not
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}
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func (p *charParser) parse(t Trace, c *context) {
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t = t.Extend(p.name)
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t.Out1("parsing char", c.offset)
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if p.commit&Documentation != 0 {
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t.Out1("fail, doc")
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c.fail(c.offset)
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return
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}
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if m, ok := c.fromCache(p.name); ok {
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t.Out1("found in cache, match:", m)
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return
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}
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if tok, ok := c.token(); ok && p.match(tok) {
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t.Out1("success", string(tok))
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n := newNode(p.name, p.commit, c.offset, c.offset+1)
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c.cache.set(c.offset, p.name, n)
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for _, includedBy := range p.includedBy {
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includedBy.cacheIncluded(c, n)
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}
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c.success(n)
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return
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} else {
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t.Out1("fail", string(tok))
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c.cache.set(c.offset, p.name, nil)
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c.fail(c.offset)
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return
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}
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}
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