lib/min_lang.nim
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import critbits, strutils, os, json import ../core/types, ../core/parser, ../core/interpreter, ../core/utils, ../core/regex, ../vendor/linenoise proc lang_module*(i: In) = i.scope .symbol("exit") do (i: In): quit(0) .symbol("symbols") do (i: In): var q = newSeq[MinValue](0) var scope = i.scope while scope.isNotNil: for s in scope.symbols.keys: q.add s.newVal scope = scope.parent i.push q.newVal .symbol("sigils") do (i: In): var q = newSeq[MinValue](0) var scope = i.scope while scope.isNotNil: for s in scope.sigils.keys: q.add s.newVal scope = scope.parent i.push q.newVal .symbol("from-json") do (i: In): var s: MinValue i.reqString s i.push s.getString.parseJson.fromJson .symbol("to-json") do (i: In): var q: MinValue i.reqQuotation q i.push(($(%q)).newVal) .symbol("debug?") do (i: In): i.push i.debugging.newVal .symbol("debug") do (i: In): i.debugging = not i.debugging echo "Debugging: $1" % [$i.debugging] # Language constructs .symbol("define") do (i: In): var sym, val: MinValue i.reqStringLike sym var q1 = i.pop # existing (auto-quoted) var symbol: string if not q1.isQuotation: q1 = @[q1].newVal symbol = sym.getString i.debug "[define] " & symbol & " = " & $q1 #let p = proc(i: In) = # i.push q1.qVal #i.scope.symbols[symbol] = MinOperator(kind: minProcOp, prc: p) i.scope.symbols[symbol] = MinOperator(kind: minValOp, val: q1) .symbol("bind") do (i: In): var sym, val: MinValue i.reqStringLike sym var q1 = i.pop # existing (auto-quoted) var symbol: string if not q1.isQuotation: q1 = @[q1].newVal symbol = sym.getString i.debug "[bind] " & symbol & " = " & $q1 #let p = proc (i: In) = # i.push q1.qVal #let res = i.scope.setSymbol(symbol, MinOperator(kind: minProcOp, prc: p)) let res = i.scope.setSymbol(symbol, MinOperator(kind: minValOp, val: q1)) if not res: raiseUndefined("Attempting to bind undefined symbol: " & symbol) .symbol("delete") do (i: In): var sym: MinValue i.reqStringLike sym let res = i.scope.delSymbol(sym.getString) if not res: raiseUndefined("Attempting to delete undefined symbol: " & sym.getString) .symbol("scope") do (i: In): var code: MinValue i.reqQuotation code code.filename = i.filename i.unquote("<scope>", code) i.push @[code].newVal .symbol("module") do (i: In): var code, name: MinValue i.reqStringLike name i.reqQuotation code code.filename = i.filename i.unquote("<module>", code) #let p = proc(i: In) = # i.push code #i.scope.symbols[name.getString] = MinOperator(kind: minProcOp, prc: p) i.scope.symbols[name.getString] = MinOperator(kind: minValOp, val: @[code].newVal) .symbol("import") do (i: In): var mdl, rawName: MinValue var name: string i.reqStringLike rawName name = rawName.getString #i.scope.getSymbol(name).prc(i) i.execOp(i.scope.getSymbol(name)) i.reqQuotation mdl if mdl.scope.isNotNil: for sym, val in mdl.scope.symbols.pairs: i.debug "[import] $1:$2" % [i.scope.name, sym] i.scope.symbols[sym] = val .symbol("sigil") do (i: In): var q1, q2: MinValue i.reqTwoQuotations q1, q2 if q1.qVal.len == 1 and q1.qVal[0].kind == minSymbol: var symbol = q1.qVal[0].symVal if symbol.len == 1: if i.scope.hasSigil(symbol): raiseInvalid("Sigil '$1' already exists" % [symbol]) #let p = proc(i: In) = # i.evaluating = true # i.push q2.qVal # i.evaluating = false i.scope.sigils[symbol] = MinOperator(kind: minValOp, val: q2) else: raiseInvalid("A sigil can only have one character") else: raiseInvalid("The top quotation must contain only one symbol value") .symbol("eval") do (i: In): var s: MinValue i.reqString s i.eval s.strVal .symbol("load") do (i: In): var s: MinValue i.reqStringLike s var file = s.getString if not file.endsWith(".min"): file = file & ".min" i.load i.pwd.joinPath(file) .symbol("with") do (i: In): var qscope, qprog: Minvalue i.reqTwoQuotations qscope, qprog i.unquote("<with-scope>", qscope) i.withScope(qscope): i.unquote("<with-program>", qprog) .symbol("call") do (i: In): var symbol, q: Minvalue i.reqStringLike symbol i.reqQuotation q let s = symbol.getString let origScope = i.scope i.scope = q.scope #let sProc = i.scope.getSymbol(s).prc # Restore original quotation #sProc(i) let sym = i.scope.getSymbol(s) i.execOp(sym) i.scope = origScope .symbol("inspect") do (i: In): var scope: MinValue i.reqQuotation scope var symbols = newSeq[MinValue](0) for s in scope.scope.symbols.keys: symbols.add s.newVal i.push symbols.newVal # ("SomeError" "message") .symbol("raise") do (i: In): var err: MinValue i.reqQuotation err raiseRuntime("($1) $2" % [err.qVal[0].getString, err.qVal[1].getString], err.qVal) .symbol("try") do (i: In): var prog: MinValue i.reqQuotation prog if prog.qVal.len == 0: raiseInvalid("Quotation must contain at least one element") var code = prog.qVal[0] var final, catch: MinValue var hasFinally = false var hasCatch = false if prog.qVal.len > 1: catch = prog.qVal[1] hasCatch = true if prog.qVal.len > 2: final = prog.qVal[2] hasFinally = true if (not code.isQuotation) or (hasCatch and not catch.isQuotation) or (hasFinally and not final.isQuotation): raiseInvalid("Quotation must contain at one quotation") i.unsafe = true try: i.unquote("<try-code>", code) except MinRuntimeError: if not hasCatch: return i.unsafe = false let e = (MinRuntimeError)getCurrentException() i.push e.qVal.newVal i.unquote("<try-catch>", catch) except: if not hasCatch: return i.unsafe = false let e = getCurrentException() i.push @[regex.replace($e.name, ":.+$", "").newVal, e.msg.newVal].newVal i.unquote("<try-catch>", catch) finally: if hasFinally: i.unquote("<try-finally>", final) # Operations on the whole stack .symbol("clear-stack") do (i: In): while i.stack.len > 0: discard i.pop .symbol("dump-stack") do (i: In): echo i.dump .symbol("get-stack") do (i: In): i.push i.stack.newVal .symbol("set-stack") do (i: In): var q: MinValue i.reqQuotation q i.stack = q.qVal # Operations on quotations or strings .symbol("concat") do (i: In): var q1, q2: MinValue i.reqTwoQuotationsOrStrings q1, q2 if q1.isString and q2.isString: let s = q2.strVal & q1.strVal i.push newVal(s) else: let q = q2.qVal & q1.qVal i.push newVal(q) .symbol("first") do (i: In): var q: MinValue i.reqStringOrQuotation q if q.isQuotation: if q.qVal.len == 0: raiseOutOfBounds("Quotation is empty") i.push q.qVal[0] elif q.isString: if q.strVal.len == 0: raiseOutOfBounds("String is empty") i.push newVal($q.strVal[0]) .symbol("rest") do (i: In): var q: MinValue i.reqStringOrQuotation q if q.isQuotation: if q.qVal.len == 0: raiseOutOfBounds("Quotation is empty") i.push newVal(q.qVal[1..q.qVal.len-1]) elif q.isString: if q.strVal.len == 0: raiseOutOfBounds("String is empty") i.push newVal(q.strVal[1..q.strVal.len-1]) .symbol("quote") do (i: In): let a = i.pop i.push MinValue(kind: minQuotation, qVal: @[a]) .symbol("unquote") do (i: In): var q: MinValue i.reqQuotation q i.unquote("<unquote>", q) .symbol("append") do (i: In): var q: MinValue i.reqQuotation q let v = i.pop q.qVal.add v i.push q .symbol("cons") do (i: In): var q: MinValue i.reqQuotation q let v = i.pop q.qVal = @[v] & q.qVal i.push q .symbol("at") do (i: In): var index, q: MinValue i.reqIntAndQuotation index, q if q.qVal.len-1 < index.intVal: raiseOutOfBounds("Insufficient items in quotation") i.push q.qVal[index.intVal.int] .symbol("size") do (i: In): var q: MinValue i.reqStringOrQuotation q if q.isQuotation: i.push q.qVal.len.newVal elif q.isString: i.push q.strVal.len.newVal .symbol("contains") do (i: In): let v = i.pop var q: MinValue i.reqQuotation q i.push q.qVal.contains(v).newVal .symbol("map") do (i: In): var prog, list: MinValue i.reqTwoQuotations prog, list i.push newVal(newSeq[MinValue](0)) for litem in list.qVal: i.push litem i.unquote("<map-quotation>", prog) i.apply("swap") i.apply("append") .symbol("times") do (i: In): var t, prog: MinValue i.reqIntAndQuotation t, prog if t.intVal < 1: raiseInvalid("A non-zero natural number is required") for c in 1..t.intVal: i.unquote("<times-quotation>", prog) .symbol("ifte") do (i: In): var fpath, tpath, check: MinValue i.reqThreeQuotations fpath, tpath, check var stack = i.copystack i.unquote("<ifte-check>", check) let res = i.pop i.stack = stack if res.isBool and res.boolVal == true: i.unquote("<ifte-true>", tpath) else: i.unquote("<ifte-false>", fpath) .symbol("while") do (i: In): var d, b: MinValue i.reqTwoQuotations d, b i.push b.qVal i.unquote("<while-check>", b) var check = i.pop while check.isBool and check.boolVal == true: i.unquote("<while-quotation>", d) i.unquote("<while-check>", b) check = i.pop .symbol("filter") do (i: In): var filter, list: MinValue i.reqTwoQuotations filter, list var res = newSeq[MinValue](0) for e in list.qVal: i.push e i.unquote("<filter-check>", filter) var check = i.pop if check.isBool and check.boolVal == true: res.add e i.push res.newVal .symbol("linrec") do (i: In): var r2, r1, t, p: MinValue i.reqFourQuotations r2, r1, t, p proc linrec(i: In, p, t, r1, r2: var MinValue) = i.unquote("<linrec-predicate>", p) var check = i.pop if check.isBool and check.boolVal == true: i.unquote("<linrec-true>", t) else: i.unquote("<linrec-r1>", r1) i.linrec(p, t, r1, r2) i.unquote("<linrec-r2>", r2) i.linrec(p, t, r1, r2) .symbol("dget") do (i: In): var d, k: MinValue i.reqStringLike k i.reqDictionary d i.push d i.push d.dget(k) .symbol("dset") do (i: In): var d, k: MinValue let m = i.pop i.reqStringLike k i.reqDictionary d i.push d.dset(k, m) .symbol("ddel") do (i: In): var d, k: MinValue i.reqStringLike k i.reqDictionary d i.push d.ddel(k) .symbol("dprint") do (i: In): var d: MinValue i.reqDictionary d for v in d.qVal: echo "$1: $2" % [$v.qVal[0], $v.qVal[1]] i.push d .symbol("keys") do (i: In): var d: MinValue i.reqDictionary d i.push d i.push d.keys .symbol("values") do (i: In): var d: MinValue i.reqDictionary d i.push d i.push d.values .symbol("interpolate") do (i: In): var s, q: MinValue i.reqQuotationAndString q, s var strings = newSeq[string](0) for el in q.qVal: if el.isSymbol: i.push el strings.add $$i.pop else: strings.add $$el let res = s.strVal % strings i.push res.newVal .symbol("version") do (i: In): i.push version.newVal .symbol("clear") do (i: In): linenoiseClearScreen() # Save/load symbols .symbol("save-symbol") do (i: In): var s:MinValue i.reqStringLike s let sym = s.getString let op = i.scope.getSymbol(sym) if op.kind == minProcOp: raiseInvalid("Symbol '$1' cannot be serialized." % sym) let json = MINIMSYMBOLS.readFile.parseJson json[sym] = %op.val MINIMSYMBOLS.writeFile(json.pretty) .symbol("load-symbol") do (i: In): var s:MinValue i.reqStringLike s let sym = s.getString let json = MINIMSYMBOLS.readFile.parseJson if not json.hasKey(sym): raiseUndefined("Symbol '$1' not found." % sym) let val = json[sym].fromJson i.scope.symbols[sym] = MinOperator(kind: minValOp, val: val) .symbol("stored-symbols") do (i: In): var s:MinValue var q = newSeq[MinValue](0) let json = MINIMSYMBOLS.readFile.parseJson for k,v in json.pairs: q.add k.newVal i.push q.newVal .symbol("remove-symbol") do (i: In): var s:MinValue i.reqStringLike s let sym = s.getString var json = MINIMSYMBOLS.readFile.parseJson if not json.hasKey(sym): raiseUndefined("Symbol '$1' not found." % sym) json.delete(sym) MINIMSYMBOLS.writeFile(json.pretty) # Sigils .sigil("'") do (i: In): var s: MinValue i.reqString s i.push(@[s.strVal.newSym].newVal) .sigil(":") do (i: In): i.push("define".newSym) .sigil("~") do (i: In): i.push("delete".newSym) .sigil("$") do (i: In): i.push("getenv".newSym) .sigil("!") do (i: In): i.push("system".newSym) .sigil("&") do (i: In): i.push("run".newSym) .sigil("@") do (i: In): i.push("bind".newSym) .sigil("=") do (i: In): i.push("module".newSym) .sigil("%") do (i: In): i.push("call".newSym) .sigil("/") do (i: In): i.push("dget".newSym) .sigil(">") do (i: In): i.push("save-symbol".newSym) .sigil("<") do (i: In): i.push("load-symbol".newSym) .finalize() |