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