Complete current Ludus grammar.
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justfile
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2
justfile
Normal file
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@ -0,0 +1,2 @@
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build:
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npx lezer-generator ludus.grammar -o ludus.js
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168
ludus.grammar
168
ludus.grammar
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@ -1,10 +1,12 @@
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@top Script { terminator* line+ }
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@precedence { line_end @left, line_break @left }
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@top Script { (newline | terminator)* line+ }
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@skip { space | comment }
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line { (expression | toplevel) terminator+ }
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line { (expression | toplevel) !line_end (newline | terminator)+ }
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toplevel { Import | Use | Ns }
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toplevel { Import | Use | Ns | Test }
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Import { silent<"import"> String silent<"as"> Word }
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@ -18,6 +20,8 @@ Ns {
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"}"
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}
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Test { silent<"test"> String non_binding }
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expression { non_binding | binding }
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binding { Let | Ref | Fn_Named | Fn_Compound }
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@ -33,11 +37,11 @@ synth_term { Args | Keyword }
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arg_term { Placeholder | simple }
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Args {
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("(" separator* ")")
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("(" (newline | separator)* ")")
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| ("("
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separator*
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arg_term (separator+ arg_term)*
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separator*
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(newline | separator)*
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arg_term ((newline | separator)+ arg_term)*
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(newline | separator)*
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")")
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}
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@ -49,21 +53,13 @@ complex {
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| If_Let
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| Match
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| When
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//| Do
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//| Bind
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| Do
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| Loop
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| Repeat
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| Each
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}
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Repeat { silent<"repeat"> (Word | Number) Block }
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// repeat 4 { thing () }
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Each { silent<"each"> simple "do" (Fn_Clause | Fn_Clauses) }
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// each [1, 2, 3] do (n) -> thing
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Recur { silent<"recur"> Args }
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Loop { silent<"loop"> simple "with" (Fn_Clause | Fn_Clauses) }
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@ -74,9 +70,9 @@ Fn_Clause { Tuple_Pattern "->" expression }
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Fn_Clauses {
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"{"
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terminator*
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Fn_Clause (terminator+ Fn_Clause)*
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terminator*
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(newline | terminator)*
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Fn_Clause ((newline | terminator)+ Fn_Clause)*
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(newline | terminator)*
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"}"
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}
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@ -87,84 +83,71 @@ Fn_Named { silent<"fn"> Word Fn_Clause }
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Fn_Lambda { silent<"fn"> Fn_Clause }
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// TODO: figure out precedence with do/bind exprs
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// do_expr { Fn_Lambda | Synthetic | Word | Keyword }
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do_expr { Fn_Lambda | Synthetic | Word | Keyword }
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// Do {
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// silent<"do"> simple (~ambig newline* ">" do_expr)+
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// }
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// Bind {
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// silent<"bind">
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// simple
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// (!pipeline pipeline)+
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// }
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Do {
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silent<"do"> simple !line_break (newline* ">" do_expr)+
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}
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Pattern {
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Tuple_Pattern
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| List_Pattern
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| Dict_Pattern
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| Struct_Pattern
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| atom
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| Placeholder
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| Ignored
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}
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Ignored { "_" Word }
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Placeholder { "_" }
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ellipsis { "..." }
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Splattern { ellipsis (Word | Placeholder) }
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Splattern { ellipsis (Word | Placeholder | Ignored) }
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Tuple_Pattern {
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("(" separator* ")")
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("(" (newline | separator)* ")")
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| ("("
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separator*
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(Pattern separator+)* (Pattern | Splattern)
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separator*
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(newline | separator)*
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(Pattern (newline | separator)+)* (Pattern | Splattern)
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(newline | separator)*
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")")
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}
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List_Pattern {
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("[" separator* "]")
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("[" (newline | separator)* "]")
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| ("["
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separator*
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(Pattern separator+)* (Pattern | Splattern)
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separator*
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(newline | separator)*
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(Pattern (newline | separator)+)* (Pattern | Splattern)
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(newline | separator)*
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"]")
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}
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Assoc_Pattern { Word | (Keyword Pattern) }
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Dict_Pattern {
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("#{" separator* "}")
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("#{" (newline | separator)* "}")
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| ("#{"
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separator*
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(Assoc_Pattern separator+)* (Assoc_Pattern | Splattern)
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separator*
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(newline | separator)*
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(Assoc_Pattern (newline | separator)+)* (Assoc_Pattern | Splattern)
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(newline | separator)*
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"}")
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}
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Struct_Pattern {
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("@{" separator* "}")
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| ("@{"
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separator*
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(Assoc_Pattern separator+)* (Assoc_Pattern | Splattern)
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separator*
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"}")
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}
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Let { silent<"let"> Pattern "=" non_binding }
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Let { silent<"let"> Pattern "=" !line_break newline* non_binding }
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Else { silent<"else"> }
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Match_Clause {(Pattern | Else) "->" newline* expression}
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Match_Clause {(Pattern | Else) "->" !line_break newline* expression}
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match_body {
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Match_Clause
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| (
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"{"
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terminator*
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Match_Clause (terminator+ Match_Clause)*
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terminator*
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(newline | terminator)*
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Match_Clause ((newline | terminator)+ Match_Clause)*
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(newline | terminator)*
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"}"
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)
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}
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@ -177,35 +160,36 @@ Match {
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}
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When_Clause {
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(simple | Placeholder | Else) "->" newline* expression
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(simple | Placeholder | Else) "->" !line_break newline* expression
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}
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When {
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silent<"when"> "{"
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terminator*
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When_Clause (terminator+ When_Clause)*
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terminator*
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silent<"when">
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"{"
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(newline | terminator)*
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When_Clause ((newline | terminator)+ When_Clause)*
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(newline | terminator)*
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"}"
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}
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If {
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silent<"if"> simple newline*
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silent<"then"> expression newline*
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silent<"if"> simple !line_break newline*
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silent<"then"> expression !line_break newline*
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silent<"else"> expression
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}
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If_Let {
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silent<"if"> silent<"let">
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Pattern "=" simple newline*
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silent<"then"> expression newline*
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Pattern "=" simple !line_break newline*
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silent<"then"> expression !line_break newline*
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silent<"else"> expression
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}
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Block {
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"{"
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terminator*
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expression (terminator+ expression)*
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terminator*
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(newline | terminator)*
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expression ((newline | terminator)+ expression)*
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(newline | terminator)*
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"}"
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}
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@ -214,16 +198,15 @@ collection {
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| List
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| Set
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| Dict
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| Struct
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}
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Tuple {
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( "(" // non-empty
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separator*
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non_binding (separator+ non_binding)*
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separator*
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(newline | separator)*
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non_binding ((newline | separator)+ non_binding)*
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(newline | separator)*
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")" )
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| "(" separator* ")" // empty
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| "(" (newline | separator)* ")" // empty
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}
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Splat { ellipsis Word }
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@ -232,20 +215,20 @@ linear_term { Splat | non_binding }
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List {
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("["
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separator*
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linear_term (separator+ linear_term)*
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separator*
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(newline | separator)*
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linear_term ((newline | separator)+ linear_term)*
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(newline | separator)*
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"]" )
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| "[" separator* "]"
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| "[" (newline | separator)* "]"
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}
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Set {
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("${"
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separator*
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linear_term (separator+ linear_term)*
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separator*
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(newline | separator)*
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linear_term ((newline | separator)+ linear_term)*
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(newline | separator)*
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"}")
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| "${" separator* "}"
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| "${" (newline | separator)* "}"
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}
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assoc_term { Word | (Keyword non_binding) }
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@ -254,20 +237,11 @@ dict_term { assoc_term | Splat }
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Dict {
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("#{"
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separator*
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dict_term (separator+ dict_term)*
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separator*
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(newline | separator)*
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dict_term ((newline | separator)+ dict_term)*
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(newline | separator)*
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"}" )
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| "#{" separator* "}"
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}
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Struct {
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("@{"
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separator*
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assoc_term (separator+ assoc_term)*
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separator*
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"}")
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| "@{" separator* "}"
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| "#{" (newline | separator)* "}"
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}
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atom { Boolean | Nil | String | Number | Keyword | Word }
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@ -290,7 +264,7 @@ Nil { silent<"nil"> }
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int { $[1-9]$[0-9]* | "0" }
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float { ("0" | int ) "." $[0-9]+}
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Number { "-"? (int | float) }
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separator { $[,\n] }
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terminator { $[;\n] }
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separator { "," }
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terminator { ";" }
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newline { "\n" }
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}
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47
ludus.terms.js
Normal file
47
ludus.terms.js
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@ -0,0 +1,47 @@
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// This file was generated by lezer-generator. You probably shouldn't edit it.
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export const
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Script = 1,
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Boolean = 2,
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Word = 3,
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Nil = 6,
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String = 7,
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Number = 8,
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Keyword = 9,
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Tuple = 10,
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List = 11,
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Splat = 12,
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Set = 13,
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Dict = 14,
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Synthetic = 15,
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Args = 16,
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Placeholder = 17,
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Fn_Lambda = 18,
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Fn_Clause = 19,
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Tuple_Pattern = 20,
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Pattern = 21,
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List_Pattern = 22,
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Splattern = 23,
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Ignored = 24,
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Dict_Pattern = 25,
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Assoc_Pattern = 26,
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Recur = 27,
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Block = 28,
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If = 29,
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If_Let = 30,
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Match = 31,
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Match_Clause = 32,
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Else = 33,
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When = 34,
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When_Clause = 35,
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Do = 36,
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Loop = 37,
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Fn_Clauses = 38,
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Repeat = 39,
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Let = 40,
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Ref = 41,
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Fn_Named = 42,
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Fn_Compound = 43,
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Import = 44,
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Use = 45,
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Ns = 46,
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Test = 47
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Loading…
Reference in New Issue
Block a user