26 lines
842 B
Plaintext
26 lines
842 B
Plaintext
|
package main
|
||
|
|
|
||
|
|
type Statement Peg {}
|
||
|
|
|
||
|
|
Statement <- WS? (Assignment / Action / Expression) WS? !.
|
||
|
|
Assignment <- Variable WS? '=' WS? Expression
|
||
|
|
Variable <- [a-zA-Z_][a-zA-Z0-9_]*
|
||
|
|
Expression <- (StringLiteral / Indexing / Search / Variable)
|
||
|
|
StringLiteral <- '"' QuotedText '"'
|
||
|
|
QuotedText <- (EscapedChar / [^\\"])*
|
||
|
|
EscapedChar <- '\\' [\\n"]
|
||
|
|
Indexing <- Variable ('[' Index ']')+
|
||
|
|
Index <- [0-9a-z]+
|
||
|
|
Search <- Variable '[' WS? 'where' WS Query ']'
|
||
|
|
Action <- Expression '.' Command
|
||
|
|
Command <- Function '(' Args? ')'
|
||
|
|
Function <- [a-zA-Z]+
|
||
|
|
Args <- StringLiteral (WS? ',' WS? Args)
|
||
|
|
Query <- Conjunctions (WS? '||' WS? Conjunctions)?
|
||
|
|
Conjunctions <- Conjunction (WS? '&&' WS? Conjunctions)?
|
||
|
|
Conjunction <- Field WS? Relation WS? StringLiteral
|
||
|
|
Field <- [a-z][a-zA-Z0-9]*
|
||
|
|
Relation <- ('==' / '!=' / 'contains' / 'startsWith' / 'endsWith')
|
||
|
|
|
||
|
|
WS <- [ \t]+
|