lib/min_lang.nim
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import critbits, strutils, sequtils, parseopt, algorithm, json, os, logging import ../core/consts, ../core/parser, ../core/value, ../core/interpreter, ../core/utils, ../packages/nim-sgregex/sgregex, ../packages/niftylogger, ../packages/nimline/nimline, ../core/scope proc lang_module*(i: In) = let def = i.scope def.symbol("exit") do (i: In): let vals = i.expect("int") quit(vals[0].intVal.int) def.symbol("apply") do (i: In): let vals = i.expect("quot") var prog = vals[0] i.apply prog def.symbol("symbols") do (i: In): var q = newSeq[MinValue](0) var scope = i.scope while not scope.isNil: for s in scope.symbols.keys: q.add s.newVal scope = scope.parent i.push q.newVal(i.scope) def.symbol("defined?") do (i: In): let vals = i.expect("'sym") i.push(i.scope.hasSymbol(vals[0].getString).newVal) def.symbol("sigils") do (i: In): var q = newSeq[MinValue](0) var scope = i.scope while not scope.isNil: for s in scope.sigils.keys: q.add s.newVal scope = scope.parent i.push q.newVal(i.scope) def.symbol("module-symbols") do (i: In): let vals = i.expect("quot") let m = vals[0] var q = newSeq[MinValue](0) for s in m.scope.symbols.keys: q.add s.newVal i.push q.newVal(i.scope) def.symbol("module-sigils") do (i: In): let vals = i.expect("quot") let m = vals[0] var q = newSeq[MinValue](0) for s in m.scope.sigils.keys: q.add s.newVal i.push q.newVal(i.scope) def.symbol("lite?") do (i: In): i.push defined(lite).newVal def.symbol("from-json") do (i: In): let vals = i.expect("string") let s = vals[0] i.push i.fromJson(s.getString.parseJson) def.symbol("to-json") do (i: In): let vals = i.expect "quot" let q = vals[0] i.push(($((%q).pretty)).newVal) def.symbol("loglevel") do (i: In): let vals = i.expect("'sym") let s = vals[0] var str = s.getString echo "Log level: ", setLogLevel(str) def.symbol("loglevel?") do (i: In): echo "Log level: ", getLogLevel() # Language constructs def.symbol("define") do (i: In): let vals = i.expect("'sym", "a") let sym = vals[0] var q1 = vals[1] # existing (auto-quoted) var symbol: string var isQuot = true if not q1.isQuotation: q1 = @[q1].newVal(i.scope) isQuot = false symbol = sym.getString if not symbol.match "^[a-zA-Z_][a-zA-Z0-9/!?+*._-]*$": raiseInvalid("Symbol identifier '$1' contains invalid characters." % symbol) info "[define] $1 = $2" % [symbol, $q1] if i.scope.symbols.hasKey(symbol) and i.scope.symbols[symbol].sealed: raiseUndefined("Attempting to redefine sealed symbol '$1'" % [symbol]) i.scope.symbols[symbol] = MinOperator(kind: minValOp, val: q1, sealed: false, quotation: isQuot) def.symbol("bind") do (i: In): let vals = i.expect("'sym", "a") let sym = vals[0] var q1 = vals[1] # existing (auto-quoted) var symbol: string var isQuot = true if not q1.isQuotation: q1 = @[q1].newVal(i.scope) isQuot = false symbol = sym.getString info "[bind] $1 = $2" % [symbol, $q1] let res = i.scope.setSymbol(symbol, MinOperator(kind: minValOp, val: q1, quotation: isQuot)) if not res: raiseUndefined("Attempting to bind undefined symbol: " & symbol) def.symbol("delete") do (i: In): let vals = i.expect("'sym") let sym = vals[0] let res = i.scope.delSymbol(sym.getString) if not res: raiseUndefined("Attempting to delete undefined symbol: " & sym.getString) def.symbol("module") do (i: In): let vals = i.expect("'sym", "quot") let name = vals[0] var code = vals[1] code.filename = i.filename i.dequote(code) info("[module] $1 ($2 symbols)" % [name.getString, $code.scope.symbols.len]) i.scope.symbols[name.getString] = MinOperator(kind: minValOp, val: @[code].newVal(i.scope), quotation: true) def.symbol("import") do (i: In): var vals = i.expect("'sym") let rawName = vals[0] var name: string name = rawName.getString var op = i.scope.getSymbol(name) i.apply(op) vals = i.expect("quot") let mdl = vals[0] info("[import] Importing: $1 ($2 symbols, $3 sigils)" % [name, $mdl.scope.symbols.len, $mdl.scope.sigils.len]) for sym, val in mdl.scope.symbols.pairs: if i.scope.symbols.hasKey(sym) and i.scope.symbols[sym].sealed: raiseUndefined("Attempting to redefine sealed symbol '$1'" % [sym]) i.debug "[import] $1" % [sym] i.scope.symbols[sym] = val for sig, val in mdl.scope.sigils.pairs: if i.scope.sigils.hasKey(sig) and i.scope.sigils[sig].sealed: raiseUndefined("Attempting to redefine sealed sigil '$1'" % [sig]) i.debug "[import] $1" % [sig] i.scope.sigils[sig] = val def.symbol("eval") do (i: In): let vals = i.expect("string") let s = vals[0] i.eval s.strVal def.symbol("parse") do (i: In): let vals = i.expect("string") let s = vals[0] i.push i.parse s.strVal def.symbol("load") do (i: In): let vals = i.expect("'sym") let s = vals[0] var file = s.getString if not file.endsWith(".min"): file = file & ".min" file = i.pwd.joinPath(file) info("[load] File: ", file) if not file.fileExists: raiseInvalid("File '$1' does not exist." % file) i.load file def.symbol("read") do (i: In): let vals = i.expect("'sym") let s = vals[0] var file = s.getString if not file.endsWith(".min"): file = file & ".min" info("[read] File: ", file) if not file.fileExists: raiseInvalid("File '$1' does not exist." % file) i.push i.read file def.symbol("with") do (i: In): let vals = i.expect("quot", "quot") var qscope = vals[0] let qprog = vals[1] if qscope.qVal.len > 0: # System modules are empty quotes and don't need to be dequoted i.dequote(qscope) i.withScope(qscope): for v in qprog.qVal: i.push v def.symbol("publish") do (i: In): let vals = i.expect("quot", "'sym") let qscope = vals[0] let str = vals[1] let sym = str.getString if qscope.scope.symbols.hasKey(sym) and qscope.scope.symbols[sym].sealed: raiseUndefined("Attempting to redefine sealed symbol '$1'" % [sym]) let scope = i.scope info("[publish] Symbol: $2" % [sym]) let op = proc(i: In) {.closure.} = let origscope = i.scope i.scope = scope i.evaluating = true i.push sym.newSym i.evaluating = false i.scope = origscope qscope.scope.symbols[sym] = MinOperator(kind: minProcOp, prc: op) def.symbol("source") do (i: In): let vals = i.expect("'sym") let s = vals[0] let str = s.getString let sym = i.scope.getSymbol(str) if sym.kind == minValOp: i.push sym.val else: raiseInvalid("No source available for native symbol '$1'." % str) def.symbol("call") do (i: In): let vals = i.expect("'sym", "quot") let symbol = vals[0] let q = vals[1] let s = symbol.getString let origScope = i.scope i.scope = q.scope let sym = i.scope.getSymbol(s) i.apply(sym) i.scope = origScope def.symbol("raise") do (i: In): let vals = i.expect("dict") let err = vals[0] if err.dhas("error".newVal) and err.dhas("message".newVal): raiseRuntime("($1) $2" % [i.dget(err, "error".newVal).getString, i.dget(err, "message").getString], err.qVal) else: raiseInvalid("Invalid error dictionary") def.symbol("format-error") do (i: In): let vals = i.expect("dict") let err = vals[0] if err.dhas("error".newVal) and err.dhas("message".newVal): var msg: string var list = newSeq[MinValue]() list.add i.dget(err, "message") if err.dhas("symbol"): list.add i.dget(err, "symbol") if err.dhas("filename"): list.add i.dget(err, "filename") if err.dhas("line"): list.add i.dget(err, "line") if err.dhas("column"): list.add i.dget(err, "column") if list.len <= 1: msg = "$1" % $$list[0] else: msg = "$3($4,$5) `$2`: $1" % [$$list[0], $$list[1], $$list[2], $$list[3], $$list[4]] i.push msg.newVal else: raiseInvalid("Invalid error dictionary") def.symbol("try") do (i: In): let vals = i.expect("quot") let prog = vals[0] 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 least one quotation") try: i.dequote(code) except MinRuntimeError: if not hasCatch: return let e = (MinRuntimeError)getCurrentException() i.push e.qVal.newVal(i.scope) i.dequote(catch) except: if not hasCatch: return let e = getCurrentException() var res = newSeq[MinValue](0) let err = sgregex.replace($e.name, ":.+$", "") res.add @["error".newVal, err.newVal].newVal(i.scope) res.add @["message".newVal, e.msg.newVal].newVal(i.scope) res.add @["symbol".newVal, i.currSym].newVal(i.scope) res.add @["filename".newVal, i.currSym.filename.newVal].newVal(i.scope) res.add @["line".newVal, i.currSym.line.newVal].newVal(i.scope) res.add @["column".newVal, i.currSym.column.newVal].newVal(i.scope) i.push res.newVal(i.scope) i.dequote(catch) finally: if hasFinally: i.dequote(final) def.symbol("quote") do (i: In): let vals = i.expect("a") let a = vals[0] i.push @[a].newVal(i.scope) def.symbol("dequote") do (i: In): let vals = i.expect("quot") var q = vals[0] i.dequote(q) def.symbol("tap") do (i: In): let vals = i.expect("quot", "a") let programs = vals[0] var a = vals[1] for program in programs.qVal: var p = program i.push(a) i.dequote(p) a = i.pop i.push(a) def.symbol("tap!") do (i: In): let vals = i.expect("quot", "a") let programs = vals[0] var a = vals[1] for program in programs.qVal: var p = program i.push(a) i.dequote(p) a = i.pop # Conditionals def.symbol("if") do (i: In): let vals = i.expect("quot", "quot", "quot") var fpath = vals[0] var tpath = vals[1] var check = vals[2] var stack = i.stack i.dequote(check) let res = i.pop i.stack = stack if not res.isBool: raiseInvalid("Result of check is not a boolean value") if res.boolVal == true: i.dequote(tpath) else: i.dequote(fpath) def.symbol("when") do (i: In): let vals = i.expect("quot", "quot") var tpath = vals[0] var check = vals[1] var stack = i.stack i.dequote(check) let res = i.pop i.stack = stack if not res.isBool: raiseInvalid("Result of check is not a boolean value") if res.boolVal == true: i.dequote(tpath) def.symbol("unless") do (i: In): let vals = i.expect("quot", "quot") var tpath = vals[0] var check = vals[1] var stack = i.stack i.dequote(check) let res = i.pop i.stack = stack if not res.isBool: raiseInvalid("Result of check is not a boolean value") if res.boolVal == false: i.dequote(tpath) # 4 ( # ((> 3) ("Greater than 3" put!)) # ((< 3) ("Smaller than 3" put!)) # ((true) ("Exactly 3" put!)) # ) case def.symbol("case") do (i: In): let vals = i.expect("quot") var cases = vals[0] if cases.qVal.len == 0: raiseInvalid("Empty case operator") var k = 0 let stack = i.stack for c in cases.qVal: i.stack = stack if not c.isQuotation: raiseInvalid("A quotation of quotations is required") k.inc if c.qVal.len != 2 or not c.qVal[0].isQuotation or not c.qVal[1].isQuotation: raiseInvalid("Inner quotations in case operator must contain two quotations") var q = c.qVal[0] i.dequote(q) let res = i.pop if not res.isBool(): raiseInvalid("Result of case #$1 is not a boolean value" % $k) if res.boolVal == true: var t = c.qVal[1] i.dequote(t) break # Loops def.symbol("foreach") do (i: In): let vals = i.expect("quot", "quot") var prog = vals[0] var list = vals[1] for litem in list.qVal: i.push litem i.dequote(prog) def.symbol("times") do (i: In): let vals = i.expect("int", "quot") var t = vals[0] var prog = vals[1] if t.intVal < 1: raiseInvalid("A non-zero natural number is required") for c in 1..t.intVal: i.dequote(prog) def.symbol("while") do (i: In): let vals = i.expect("quot", "quot") var d = vals[0] var b = vals[1] for e in b.qVal: i.push e i.dequote(b) var check = i.pop while check.isBool and check.boolVal == true: i.dequote(d) i.dequote(b) check = i.pop discard i.pop # Other def.symbol("linrec") do (i: In): let vals = i.expect("quot", "quot", "quot", "quot") var r2 = vals[0] var r1 = vals[1] var t = vals[2] var p = vals[3] proc linrec(i: In, p, t, r1, r2: var MinValue) = i.dequote(p) var check = i.pop if check.isBool and check.boolVal == true: i.dequote(t) else: i.dequote(r1) i.linrec(p, t, r1, r2) i.dequote(r2) i.linrec(p, t, r1, r2) def.symbol("version") do (i: In): i.push version.newVal # Save/load symbols def.symbol("save-symbol") do (i: In): let vals = i.expect("'sym") let s = vals[0] let sym = s.getString let op = i.scope.getSymbol(sym) if op.kind == minProcOp: raiseInvalid("Symbol '$1' cannot be serialized." % sym) let json = MINSYMBOLS.readFile.parseJson json[sym] = %op.val MINSYMBOLS.writeFile(json.pretty) def.symbol("load-symbol") do (i: In): let vals = i.expect("'sym") let s = vals[0] let sym = s.getString let json = MINSYMBOLS.readFile.parseJson if not json.hasKey(sym): raiseUndefined("Symbol '$1' not found." % sym) let val = i.fromJson(json[sym]) i.scope.symbols[sym] = MinOperator(kind: minValOp, val: val, quotation: true) def.symbol("stored-symbols") do (i: In): var q = newSeq[MinValue](0) let json = MINSYMBOLS.readFile.parseJson for k,v in json.pairs: q.add k.newVal i.push q.newVal(i.scope) def.symbol("remove-symbol") do (i: In): let vals = i.expect("'sym") let s = vals[0] let sym = s.getString var json = MINSYMBOLS.readFile.parseJson if not json.hasKey(sym): raiseUndefined("Symbol '$1' not found." % sym) json.delete(sym) MINSYMBOLS.writeFile(json.pretty) def.symbol("seal") do (i: In): let vals = i.expect("'sym") let sym = vals[0] var s = i.scope.getSymbol(sym.getString) s.sealed = true i.scope.setSymbol(sym.getString, s) def.symbol("unseal") do (i: In): let vals = i.expect("'sym") let sym = vals[0] var s = i.scope.getSymbol(sym.getString) s.sealed = false i.scope.setSymbol(sym.getString, s, true) def.symbol("quote-bind") do (i: In): let vals = i.expect("string", "a") let s = vals[0] let m = vals[1] i.push @[m].newVal(i.scope) i.push s i.push "bind".newSym def.symbol("quote-define") do (i: In): let vals = i.expect("string", "a") let s = vals[0] let m = vals[1] i.push @[m].newVal(i.scope) i.push s i.push "define".newSym def.symbol("args") do (i: In): var args = newSeq[MinValue](0) for kind, key, val in getopt(): case kind: of cmdArgument: args.add key.newVal else: discard i.push args.newVal(i.scope) def.symbol("opts") do (i: In): var opts = newVal(newSeq[MinValue](0), i.scope) for kind, key, val in getopt(): case kind: of cmdLongOption, cmdShortOption: if val == "": opts = i.dset(opts, key.newVal, true.newVal) else: opts = i.dset(opts, key.newVal, val.newVal) else: discard i.push opts def.symbol("raw-args") do (i: In): var args = newSeq[MinValue](0) for par in commandLineParams(): args.add par.newVal i.push args.newVal(i.scope) def.symbol("expect") do (i: In): var q: MinValue i.reqQuotationOfSymbols q i.push(i.expect(q.qVal.mapIt(it.getString())).reversed.newVal(i.scope)) # Converters def.symbol("string") do (i: In): let s = i.pop i.push(($$s).newVal) def.symbol("bool") do (i: In): let v = i.pop let strcheck = (v.isString and (v.getString == "false" or v.getString == "")) let intcheck = v.isInt and v.intVal == 0 let floatcheck = v.isFloat and v.floatVal == 0 let boolcheck = v.isBool and v.boolVal == false let quotcheck = v.isQuotation and v.qVal.len == 0 if strcheck or intcheck or floatcheck or boolcheck or quotcheck: i.push false.newVal else: i.push true.newVal def.symbol("int") do (i: In): let s = i.pop if s.isString: i.push s.getString.parseInt.newVal elif s.isFloat: i.push s.floatVal.int.newVal elif s.isInt: i.push s elif s.isBool: if s.boolVal == true: i.push 1.int.newVal else: i.push 0.int.newVal else: raiseInvalid("Cannot convert a quotation to an integer.") def.symbol("float") do (i: In): let s = i.pop if s.isString: i.push s.getString.parseFloat.newVal elif s.isInt: i.push s.intVal.float.newVal elif s.isFloat: i.push s elif s.isBool: if s.boolVal == true: i.push 1.float.newVal else: i.push 0.float.newVal else: raiseInvalid("Cannot convert a quotation to float.") def.symbol("prompt") do (i: In): i.eval(""""[$1]$$ " (.) => %""") # Sigils def.sigil("'") do (i: In): let vals = i.expect("string") let s = vals[0] i.push(@[s.strVal.newSym].newVal(i.scope)) def.sigil(":") do (i: In): i.push("define".newSym) def.sigil("~") do (i: In): i.push("delete".newSym) def.sigil("@") do (i: In): i.push("bind".newSym) def.sigil("+") do (i: In): i.push("module".newSym) def.sigil("^") do (i: In): i.push("call".newSym) def.sigil(">") do (i: In): i.push("save-symbol".newSym) def.sigil("<") do (i: In): i.push("load-symbol".newSym) def.sigil("#") do (i: In): i.push("quote-bind".newSym) def.sigil("=") do (i: In): i.push("quote-define".newSym) # Shorthand symbol aliases def.symbol("#") do (i: In): i.push("quote-bind".newSym) def.symbol("=") do (i: In): i.push("quote-define".newSym) def.symbol(":") do (i: In): i.push("define".newSym) def.symbol("@") do (i: In): i.push("bind".newSym) def.symbol("^") do (i: In): i.push("call".newSym) def.symbol("'") do (i: In): i.push("quote".newSym) def.symbol("->") do (i: In): i.push("dequote".newSym) def.symbol("=>") do (i: In): i.push("apply".newSym) def.finalize("ROOT") |