mn.nim
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import streams, strutils, os, mnpkg/parser, mnpkg/value, mnpkg/scope, mnpkg/interpreter, mnpkg/utils, mnpkg/lang export parser, interpreter, utils, value, scope, lang proc stdLib*(i: In) = i.lang_module proc interpret*(i: In, s: Stream) = i.stdLib() i.open(s, i.filename) discard i.parser.getToken() try: i.interpret() except CatchableError: i.error(getCurrentExceptionMsg()) i.close() proc interpret*(i: In, s: string): MnValue = i.open(newStringStream(s), i.filename) discard i.parser.getToken() try: result = i.interpret() except CatchableError: i.error(getCurrentExceptionMsg()) i.close() proc mnFile*(filename: string, op = "interpret", main = true): seq[string] {.discardable.} proc mnStream(s: Stream, filename: string, op = "interpret", main = true): seq[string] {.discardable.}= var i = newMinInterpreter(filename = filename) i.pwd = filename.parentDir i.interpret(s) newSeq[string](0) proc mnStr*(buffer: string) = mnStream(newStringStream(buffer), "input") proc mnFile*(filename: string, op = "interpret", main = true): seq[string] {.discardable.} = var fn = filename if not filename.endsWith(".mn"): fn &= ".mn" var fileLines = newSeq[string](0) var contents = "" try: fileLines = fn.readFile().splitLines() except CatchableError: stderr.writeLine("Cannot read from file: " & fn) quit(3) if fileLines[0].len >= 2 and fileLines[0][0..1] == "#!": contents = ";;\n" & fileLines[1..fileLines.len-1].join("\n") else: contents = fileLines.join("\n") mnStream(newStringStream(contents), fn, op, main) when isMainModule: import terminal, parseopt, mnpkg/meta var exeName = "mn" proc printResult(i: In, res: MnValue) = if res.isNil: return if i.stack.len > 0: let n = $i.stack.len if res.isQuotation and res.qVal.len > 1: echo " (" for item in res.qVal: echo " " & $item echo " ".repeat(n.len) & ")" elif res.isCommand: echo " [" & res.cmdVal & "]" else: echo " $1" % [$i.stack[i.stack.len - 1]] proc mnSimpleRepl*(i: var MnInterpreter) = i.stdLib() var s = newStringStream("") i.open(s, "<repl>") var line: string echo "mn v$#" % pkgVersion while true: stdout.write(":: ") stdout.flushFile() line = stdin.readLine() let r = i.interpret($line) if $line != "": i.printResult(r) proc mnSimpleRepl*() = var i = newMinInterpreter(filename = "<repl>") i.mnSimpleRepl() let usage* = """ mn v$version - A truly minimal concatenative programming language (c) 2021 Fabio Cevasco Usage: $exe [options] [filename] Arguments: filename A $exe file to interpret or compile Options: -e, --evaluate Evaluate a $exe program inline -h, --help Print this help -d, --debug Enable debug messages -v, —-version Print the program version""" % [ "exe", exeName, "version", pkgVersion, ] var file, s: string = "" var args = newSeq[string](0) var p = initOptParser() for kind, key, val in getopt(p): case kind: of cmdArgument: args.add key if file == "": file = key of cmdLongOption, cmdShortOption: case key: of "debug", "d": DEBUG = true of "evaluate", "e": if file == "": s = val of "help", "h": if file == "": echo usage quit(0) of "version", "v": if file == "": echo pkgVersion quit(0) else: discard else: discard var op = "interpret" if s != "": mnStr(s) elif file != "": mnFile file, op else: if isatty(stdin): mnSimpleRepl() quit(0) else: mnStream newFileStream(stdin), "stdin", op |