115 lines
3.7 KiB
Plaintext
115 lines
3.7 KiB
Plaintext
(import /src/base :as b)
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(defn- get-line [source line]
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((string/split "\n" source) (dec line)))
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(defn- caret [source line start]
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(def lines (string/split "\n" source))
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(def the-line (lines (dec line)))
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(def prev-lines (slice lines 0 (dec line)))
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(def char-counts (map (fn [x] (-> x length inc)) prev-lines))
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(def prev-line-chars (sum char-counts))
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(def offset (- start prev-line-chars))
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(def indent (string/repeat "." (+ 6 offset)))
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(string indent "^")
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)
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(defn scan-error [e]
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(def {:line line-num :input input :source source :start start :msg msg} e)
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(print "Syntax error: " msg)
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(print " on line " line-num " in " input ":")
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(def source-line (get-line source line-num))
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(print " >>> " source-line)
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(print (caret source line-num start))
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e)
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(defn parse-error [e]
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(def msg (e :msg))
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(def {:line line-num :input input :source source :start start} (e :token))
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(def source-line (get-line source line-num))
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(print "Syntax error: " msg)
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(print " on line " line-num " in " input ":")
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(print " >>> " source-line)
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(print (caret source line-num start))
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e)
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(defn validation-error [e]
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(def msg (e :msg))
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(def {:line line-num :input input :source source :start start} (get-in e [:node :token]))
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(def source-line (get-line source line-num))
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(case msg
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"unbound name"
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(do
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(print "Validation error: " msg " " (get-in e [:node :data]))
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(print " on line " line-num " in " input ":")
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(print " >>> " source-line)
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(print (caret source line-num start)))
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(do
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(print "Validation error: " msg)
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(print " on line " line-num " in " input ":")
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(print " >>> " source-line)
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(print (caret source line-num start))))
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e)
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(defn- fn-no-match [e]
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(print "Ludus panicked! no match")
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(def {:line line-num :source source :input input :start start} (get-in e [:node :token]))
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(def source-line (get-line source line-num))
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(print " on line " line-num " in " input ", ")
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(def called (e :called))
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(print " calling: " (slice (b/show called) 3))
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(def value (e :value))
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(print " with arguments: " (b/show value))
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(print " expected match with one of:")
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(def patterns (b/pretty-patterns called))
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(def fmt-patt (do
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(def lines (string/split "\n" patterns))
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(def indented (map (fn [x] (string " " x)) lines))
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(string/join indented "\n")
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))
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(print fmt-patt)
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(print " >>> " source-line)
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(print (caret source line-num start))
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)
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(defn- let-no-match [e]
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(print "Ludus panicked! no match")
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(def {:line line-num :source source :input input :start start} (get-in e [:node :token]))
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(def source-line (get-line source line-num))
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(print " on line " line-num " in " input ", ")
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(print " binding " (b/show (e :value)))
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(def pattern (get-in e [:node :data 0]))
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(print " to " (b/show-patt pattern))
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(print " >>> " source-line)
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(print (caret source line-num start))
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e)
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(defn- generic-panic [e]
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(def msg (e :msg))
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(def {:line line-num :source source :input input} (get-in e [:node :token]))
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(def source-line (get-line source line-num))
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(print "Ludus panicked! " msg)
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(print " on line " line-num " in " input ":")
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(print " >>> " source-line))
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(defn- unbound-name [e]
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(def {:line line-num :source source :lexeme name :input input} (get-in e [:node :token]))
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(def source-line (get-line source line-num))
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(print "Ludus panicked! unbound name " name)
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(print " on line " line-num " in " input ":")
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(print " >>> " source-line))
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(defn runtime-error [e]
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(when (= :string (type e))
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(print (string "Internal Ludus error: " e))
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(print "Please file an issue at https://alea.ludus.dev/twc/ludus/issues")
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(break e))
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(def msg (e :msg))
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(case msg
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"no match: function call" (fn-no-match e)
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"no match: let binding" (let-no-match e)
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"unbound name" (unbound-name e)
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(generic-panic e))
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e)
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