86 lines
1.6 KiB
Nim
86 lines
1.6 KiB
Nim
import ndspkg/vm
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import ndspkg/compv2/parser
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import ndspkg/compv2/node
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import ndspkg/compv2/emitter
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import ndspkg/config
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import ndspkg/chunk
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import os
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import strformat
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type Result = enum
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rsOK, rsCompileError, rsRuntimeError
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proc interpret(name: string, source: string): Result =
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let parser = newParser(name, source)
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let node = parser.parse()
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if parser.hadError:
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return rsCompileError
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when debugDumpAst:
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echo $node
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let emitter = newEmitter(name, node)
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emitter.emit()
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if emitter.hadError:
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return rsCompileError
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when debugDumpChunk:
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emitter.chunk.disassembleChunk()
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case emitter.chunk.run():
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of irOK:
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rsOK
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of irRuntimeError:
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rsRuntimeError
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proc repl =
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while true:
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try:
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let line = ndLineEditor()
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if line.len > 0:
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discard interpret("repl", line)
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except ReadlineInterruptedException:
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break
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proc runFile(path: string) =
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case interpret(path, readFile(path)):
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of rsCompileError:
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quit 65
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of rsRuntimeError:
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quit 70
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of rsOK:
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quit 0
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proc printUsage =
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echo """Usage:
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- Start a repl: nds
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- Run a file: nds path/to/script.nds
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- Run the nim half of the test suite: nds --test
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- Print this message: nds --help or nds -h
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"""
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const hardcodedPath* = ""
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if paramCount() == 0:
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if hardcodedPath == "":
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repl()
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else:
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runFile(hardcodedPath)
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elif paramCount() == 1:
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let arg = paramStr(1)
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if arg[0] != '-':
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runFile(paramStr(1))
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else:
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case arg:
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of "--help":
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printUsage()
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quit 0
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else:
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echo &"Unsupported flag {arg}."
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printUsage()
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quit 1
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else:
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echo "Maximum param count is 1."
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printUsage()
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quit 1
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