120 lines
2.2 KiB
Plaintext
120 lines
2.2 KiB
Plaintext
@top Program { Expression }
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@precedence {
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mulop @left
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addop @left
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binop @left
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and @left
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or @left
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}
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@skip {
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space
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}
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commaSep<content> { content ("," content)* }
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kw<term> { @specialize[@name={term}]<Identifier, term> }
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Query {
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TagIdentifier ( WhereClause | LimitClause | OrderClause | SelectClause | RenderClause )*
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}
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WhereClause { kw<"where"> Expression }
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LimitClause { kw<"limit"> Expression }
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OrderClause { Order commaSep<OrderBy> }
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OrderBy { Expression OrderDirection? }
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SelectClause { kw<"select"> commaSep<Select> }
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RenderClause { kw<"render"> ( kw<"each"> | kw<"all"> )? PageRef }
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Select { Identifier | Expression kw<"as"> Identifier }
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OrderDirection {
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OrderKW
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}
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Value { Number | String | Bool | Regex | kw<"null"> | List }
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Attribute {
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LVal "." Identifier
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}
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Call {
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Identifier "(" commaSep<Expression> ")" | Identifier "(" ")"
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}
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LVal {
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Identifier
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| Attribute
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}
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ParenthesizedExpression { "(" Expression ")" }
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LogicalExpression {
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Expression !and kw<"and"> Expression
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| Expression !or kw<"or"> Expression
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}
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Expression {
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Value
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| LVal
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| ParenthesizedExpression
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| LogicalExpression
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| BinExpression
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| Call
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}
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BinExpression {
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Expression !binop "<" Expression
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| Expression !binop "<=" Expression
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| Expression !binop "=" Expression
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| Expression !binop "!=" Expression
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| Expression !binop ">=" Expression
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| Expression !binop ">" Expression
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| Expression !binop "=~" Expression
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| Expression !binop "!=~" Expression
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| Expression !binop InKW Expression
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| Expression !mulop "*" Expression
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| Expression !mulop "/" Expression
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| Expression !mulop "%" Expression
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| Expression !addop "+" Expression
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| Expression !addop "-" Expression
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}
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List { "[" commaSep<Expression> "]" }
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Bool {
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BooleanKW
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}
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@tokens {
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space { std.whitespace+ }
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TagIdentifier { @asciiLetter (@asciiLetter | @digit | "-" | "_" | "/" )* }
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Identifier { @asciiLetter (@asciiLetter | @digit | "-" | "_")* }
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String {
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("\"" | "“" | "”") ![\"”“]* ("\"" | "“" | "”")
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}
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PageRef {
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"[" "[" ![\]]* "]" "]"
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}
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Order { "order by" }
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Regex { "/" ( ![/\\\n\r] | "\\" _ )* "/"? }
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Number { std.digit+ }
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BooleanKW { "true" | "false" }
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InKW { "in" }
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OrderKW { "asc" | "desc" }
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@precedence { Order, BooleanKW, InKW, OrderKW, Identifier, Number }
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}
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