Break out match from when, clean up, strictify (binding, non-binding, simple)
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Scott Richmond
parent
86cb4c2d76
commit
a7860b4544
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@ -7,9 +7,10 @@
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:refer-macros [defp]
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]
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)
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[ludus.scanner :as s]
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))
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(declare expression pattern)
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(declare expression pattern binding non-binding simple)
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(defp separator choice [:comma :newline :break])
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@ -63,7 +64,7 @@
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(quiet :rbrace)
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])
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(defp guard order-0 [(quiet :if) expression])
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(defp guard order-0 [(quiet :if) simple])
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(defp pattern flat choice [literal
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:ignored
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@ -81,16 +82,16 @@
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(defp match-entry weak-order [match-clause terminators])
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(defp match-old group order-1 [(quiet :match) expression nls?
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(quiet :with) (quiet :lbrace)
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(quiet (zero+ terminator))
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(one+ match-entry)
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(quiet :rbrace)
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])
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(defp match group order-1 [(quiet :match) simple nls?
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(quiet :with) (quiet :lbrace)
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(quiet (zero+ terminator))
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(one+ match-entry)
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(quiet :rbrace)
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])
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(defp if-expr group order-1 [(quiet :if)
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nls?
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expression
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simple
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nls?
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(quiet :then)
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expression
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@ -98,46 +99,31 @@
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(quiet :else)
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expression])
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(defp cond-lhs flat choice [expression :placeholder :else])
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(defp when-lhs flat choice [simple :placeholder :else])
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(defp cond-clause group weak-order [cond-lhs (quiet :rarrow) expression])
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(defp when-clause group weak-order [when-lhs (quiet :rarrow) expression])
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(defp cond-entry weak-order [cond-clause terminators])
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(defp when-entry weak-order [when-clause terminators])
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(defp cond-old group order-1 [(quiet :cond) (quiet :lbrace)
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(quiet (zero+ terminator))
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(one+ cond-entry)
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(quiet :rbrace)])
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(defp match group order-1 [expression nls?
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(quiet :is) (quiet :lbrace)
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(quiet (zero+ terminator))
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(one+ match-entry)
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(quiet :rbrace)])
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(defp cond-expr group order-1 [(quiet :lbrace)
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(defp when-expr group order-1 [(quiet :when) (quiet :lbrace)
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(quiet (zero+ terminator))
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(one+ cond-entry)
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(one+ when-entry)
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(quiet :rbrace)])
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(defp when-tail flat choice [match cond-expr])
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(defp when-expr weak-order [(quiet :when) when-tail])
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(defp let-expr group order-1 [(quiet :let)
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pattern
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(quiet :equals)
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nls?
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expression])
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non-binding])
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(defp tuple-entry weak-order [expression separators])
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(defp tuple-entry weak-order [non-binding separators])
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(defp tuple group order-1 [(quiet :lparen)
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(quiet (zero+ separator))
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(zero+ tuple-entry)
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(quiet :rparen)])
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(defp list-term flat choice [splat expression])
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(defp list-term flat choice [splat non-binding])
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(defp list-entry order-1 [list-term separators])
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@ -151,7 +137,7 @@
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(zero+ list-entry)
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(quiet :rbrace)])
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(defp pair group order-0 [:keyword expression])
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(defp pair group order-0 [:keyword non-binding])
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(defp struct-term flat choice [:word pair])
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@ -171,7 +157,7 @@
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(zero+ dict-entry)
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(quiet :rbrace)])
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(defp arg-expr flat choice [:placeholder expression])
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(defp arg-expr flat choice [:placeholder non-binding])
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(defp arg-entry weak-order [arg-expr separators])
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@ -192,21 +178,19 @@
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(defp fn-entry order-1 [fn-clause terminators])
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(defp compound group order-1 [(quiet :lbrace)
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nls?
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(maybe :string)
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(quiet (zero+ terminator))
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(one+ fn-entry)
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(quiet :rbrace)
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])
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(defp fn-compound group order-1 [(quiet :lbrace)
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nls?
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(maybe :string)
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(quiet (zero+ terminator))
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(one+ fn-entry)
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(quiet :rbrace)
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])
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(defp clauses flat choice [fn-clause compound])
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(defp clauses flat choice [fn-clause fn-compound])
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(defp named group order-1 [:word clauses])
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(defp fn-named group order-1 [(quiet :fn) :word clauses])
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(defp body flat choice [fn-clause named])
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(defp fn-expr group order-1 [(quiet :fn) body])
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(defp lambda group order-1 [(quiet :fn) fn-clause])
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(defp block-line weak-order [expression terminators])
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@ -226,13 +210,13 @@
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(defp ref-expr group order-1 [(quiet :ref) :word (quiet :equals) expression])
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(defp spawn group order-1 [(quiet :spawn) expression])
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; (defp spawn group order-1 [(quiet :spawn) expression])
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(defp receive group order-1 [(quiet :receive) (quiet :lbrace)
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(quiet (zero+ terminator))
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(one+ match-entry)
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(quiet :rbrace)
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])
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; (defp receive group order-1 [(quiet :receive) (quiet :lbrace)
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; (quiet (zero+ terminator))
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; (one+ match-entry)
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; (quiet :rbrace)
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; ])
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(defp compound-loop group order-0 [(quiet :lbrace)
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(quiet (zero+ terminator))
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@ -242,28 +226,19 @@
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(defp loop-expr group order-1 [(quiet :loop) tuple (quiet :with)
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(flat (choice :loop-body [fn-clause compound-loop]))])
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(defp expression flat choice [fn-expr
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;match
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loop-expr
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let-expr
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if-expr
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;cond-expr
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when-expr
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spawn
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receive
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synthetic
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recur-call
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block
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do-expr
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ref-expr
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struct-literal
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dict
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list-literal
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set-literal
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tuple
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literal])
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(defp collection flat choice [struct-literal dict list-literal set-literal tuple])
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(defp test-expr group order-1 [(quiet :test) :string expression])
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(defp simple flat choice [literal collection synthetic recur-call lambda])
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(defp compound flat choice [match loop-expr if-expr when-expr do-expr block])
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(defp binding flat choice [fn-named fn-compound let-expr ref-expr])
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(defp non-binding flat choice [simple compound])
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(defp expression flat choice [binding non-binding])
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(defp test-expr group order-1 [(quiet :test) :string non-binding])
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(defp import-expr group order-1 [(quiet :import) :string (quiet :as) :word])
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@ -274,10 +249,13 @@
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(zero+ struct-entry)
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(quiet :rbrace)])
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(defp use-expr group order-1 [(quiet :use :word)])
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(defp toplevel flat choice [import-expr
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ns-expr
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expression
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test-expr])
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test-expr
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use-expr])
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(defp script-line weak-order [toplevel terminators])
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@ -17,7 +17,7 @@
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"import" :import ;; impl
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"let" :let ;; impl
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"loop" :loop ;; impl
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; "match" :match ;; impl
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"match" :match ;; impl
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"nil" :nil ;; impl -> literal word
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"ns" :ns ;; impl
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;; "panic!" :panic ;; impl (should be a function)
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@ -26,6 +26,7 @@
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"then" :then ;; impl
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"true" :true ;; impl -> literal word
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"with" :with ;; impl
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"when" :when ;; impl, replaces cond
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;; actor model/concurrency
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"receive" :receive
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@ -38,9 +39,7 @@
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;; others
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;;"repeat" :repeat ;; syntax sugar over "loop": still unclear what this syntax could be
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"test" :test
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"when" :when
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;; "module" :module ;; not necessary if we don't have datatypes
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"is" :is
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})
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(def literal-words {
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