100 lines
2.2 KiB
Go
100 lines
2.2 KiB
Go
package parser
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import (
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"github.com/alecthomas/participle/v2"
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"github.com/alecthomas/participle/v2/lexer"
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)
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type AST struct {
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Type *string `(@Type WS)?`
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Items []*Item `@@*`
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}
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type Item struct {
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Pos lexer.Position
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Time *string `( @Number "Z" WS`
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Valid *ValidPair ` @@`
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Probability *Probability `| @@`
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Change *Change `| @@`
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WindSpeed *WindSpeed `| @@`
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Visibility *Visibility `| @@`
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SkyCondition *SkyCondition `| @@`
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Vicinity *Vicinity `| @@`
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Weather *Weather `| @@`
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Temperature *Temperature `| @@`
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Flag *Flag `| @@`
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Remark *string `| @Remark`
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ID *string `| @Ident ) WS?`
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}
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type ValidPair struct {
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Pos lexer.Position
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Start string `@Number "/"`
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End string `@Number`
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}
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type Probability struct {
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Pos lexer.Position
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Value string `Prob @Number`
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Valid ValidPair `(WS @@)?`
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}
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type WindSpeed struct {
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Pos lexer.Position
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WindShear string `("WS" @Number "/")?`
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Variable bool `@"VRB"?`
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Value string `@Number`
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Gusts string `("G" @Number)?`
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Unit string `@("MPS"|"KMH"|"KT")`
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}
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type Visibility struct {
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Pos lexer.Position
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Plus bool `@"P"?`
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Value string `@Number @WS? @(Number? "/" Number)?`
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Unit string `@"SM"?`
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}
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type SkyCondition struct {
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Pos lexer.Position
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Type string `@("FEW"|"SCT"|"BKN"|"OVC"|"VV"|"SKC")`
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Altitude string `@Number?`
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CloudType string `@("CB"|"TCU")?`
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}
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type Vicinity struct {
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Pos lexer.Position
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Descriptor string `"VC" ( @Descriptor`
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Precipitation string ` | @Precip )`
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}
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type Weather struct {
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Pos lexer.Position
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Modifier string `@Modifier?`
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Descriptor string `@Descriptor?`
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Precipitation string ` ( @Precip`
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Obscuration string ` | @Obscur`
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Other string ` | @Phenom )`
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}
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type Change struct {
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Pos lexer.Position
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Type string `@("FM"|"BECMG"|"TEMPO")`
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Time string `@Number?`
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Valid *ValidPair `WS? @@?`
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}
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type Temperature struct {
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Pos lexer.Position
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Type string `@("TX"|"TN")`
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Value string `@Number "/"`
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Time string `@Number "Z"`
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}
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type Flag struct {
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Pos lexer.Position
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CAVOK bool `@"CAVOK"`
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}
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var Parser = participle.MustBuild[AST](participle.Lexer(lex))
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