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line_o.go
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line_o.go
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package joeson
import (
"regexp"
"strconv"
"github.com/grepsuzette/joeson/helpers"
)
type OLine struct {
name string // "" unless provided by Named()
content Line
*parseOptions
}
func O(a ...any) OLine {
name, content, attrs := lineInit(a)
return OLine{name, content, attrs}
}
func (ol OLine) lineType() string { return "o" }
func (ol OLine) stringIndent(nIndent int) string {
s := helpers.Indent(nIndent)
s += ol.lineType()
s += " " + ol.name + " "
re := regexp.MustCompile("^ *o *")
s += re.ReplaceAllString(ol.content.stringIndent(nIndent), "o ")
if ol.parseOptions.cb != nil {
s += " " + Yellow("𝘧")
}
return s
}
// Convert a O line to a rule Parser.
// lazyGrammar: normally nil. A lazy grammar can be provided here. nil uses joeson_handcompiled grammar.
func (ol OLine) toRule(
rank_ *rank,
parentRule Parser,
by oLineNaming,
opts *TraceOptions,
lazyGrammar *helpers.Lazy[*Grammar],
) Parser {
// figure out the name for this rule
var name string
var content Line = ol.content
if ol.name != "" {
name = ol.name // named rule
} else if by.name != "" {
name = by.name
} else if by.index > -1 && parentRule != nil { // unamed OLine by index, will produce names like foo[0], foo[1], foo[2]
name = parentRule.getRule().name + "[" + strconv.Itoa(by.index) + "]"
} else {
panic("assert")
}
rule := getRule(rank_, name, content, parentRule, ol.parseOptions, opts, lazyGrammar)
rule.getRule().parent = parentRule
return rule
}
// specifies how to reference a rule
// (either by name, or by index)
type oLineNaming struct {
name string
index int // -1 if unset
}