60 lines
1.9 KiB
Plaintext
60 lines
1.9 KiB
Plaintext
// Self-contained dev smoke for FunctionCall empty-args
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// Goal: echo() -> empty line, itoa() -> 0
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static box MiniVm {
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// simple substring find from position
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index_of_from(hay, needle, pos) {
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if pos < 0 { pos = 0 }
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if pos >= hay.length() { return -1 }
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local tail = hay.substring(pos, hay.length())
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local rel = tail.indexOf(needle)
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if rel < 0 { return -1 } else { return pos + rel }
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}
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// collect only FunctionCall with empty arguments [] for echo/itoa
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collect_prints(json) {
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local out = new ArrayBox()
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local pos = 0
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local guard = 0
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loop (true) {
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guard = guard + 1
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if guard > 16 { break }
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local k_fc = "\"kind\":\"FunctionCall\""
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local p = index_of_from(json, k_fc, pos)
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if p < 0 { break }
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// name
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local k_n = "\"name\":\""
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local np = index_of_from(json, k_n, p)
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if np < 0 { break }
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local ni = np + k_n.length()
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local nj = index_of_from(json, "\"", ni)
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if nj < 0 { break }
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local fname = json.substring(ni, nj)
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// args [] detection
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local k_a = "\"arguments\":["
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local ap = index_of_from(json, k_a, nj)
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if ap < 0 { break }
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local rb = index_of_from(json, "]", ap)
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if rb < 0 { break }
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// no content between '[' and ']'
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if rb == ap + k_a.length() {
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if fname == "echo" { out.push("") }
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if fname == "itoa" { out.push("0") }
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}
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pos = rb + 1
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}
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return out
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}
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}
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static box Main {
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main(args) {
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local json = "{\"kind\":\"Program\",\"statements\":[{\"kind\":\"Print\",\"expression\":{\"kind\":\"FunctionCall\",\"name\":\"echo\",\"arguments\":[]}},{\"kind\":\"Print\",\"expression\":{\"kind\":\"FunctionCall\",\"name\":\"itoa\",\"arguments\":[]}}]}"
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local arr = new MiniVm().collect_prints(json)
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local i = 0
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loop (i < arr.size()) { print(arr.get(i)) i = i + 1 }
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return 0
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}
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}
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