234 lines
10 KiB
Nim
234 lines
10 KiB
Nim
# Builtins & external libs
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import strformat
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import strutils
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import terminal
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# Thanks art <3
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import jale/editor as ed
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import jale/templates
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import jale/plugin/defaults
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import jale/plugin/editor_history
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import jale/keycodes
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import jale/multiline
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# Our stuff
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import frontend/lexer as l
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import frontend/parser as p
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import frontend/compiler as c
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import backend/vm as v
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import util/serializer as s
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# Forward declarations
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proc fillSymbolTable(tokenizer: Lexer)
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proc getLineEditor: LineEditor
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# Handy dandy compile-time constants
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const debugLexer = false
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const debugParser = false
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const debugCompiler = false
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const debugSerializer = false
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const debugRuntime = false
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when debugSerializer:
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import nimSHA2
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import times
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when debugCompiler:
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import util/debugger
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when isMainModule:
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setControlCHook(proc () {.noconv.} = quit(0))
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var
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keep = true
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tokens: seq[Token] = @[]
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tree: seq[Declaration] = @[]
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compiled: Chunk
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serialized: Serialized
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tokenizer = newLexer()
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parser = newParser()
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compiler = newCompiler()
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serializer = newSerializer()
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vm = newPeonVM()
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editor = getLineEditor()
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input: string
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tokenizer.fillSymbolTable()
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editor.bindEvent(jeQuit):
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stdout.styledWriteLine(fgGreen, "Goodbye!")
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editor.prompt = ""
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keep = false
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editor.bindKey("ctrl+a"):
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editor.content.home()
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editor.bindKey("ctrl+e"):
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editor.content.`end`()
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while keep:
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try:
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input = editor.read()
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if input.len() == 0:
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continue
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# Currently the parser doesn't handle these tokens well
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tokens = tokenizer.lex(input, "stdin")
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if tokens.len() == 0:
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continue
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when debugLexer:
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styledEcho fgCyan, "Tokenization step:"
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for i, token in tokens:
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if i == tokens.high():
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# Who cares about EOF?
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break
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styledEcho fgGreen, "\t", $token
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echo ""
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tree = parser.parse(tokens, "stdin")
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if tree.len() == 0:
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continue
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when debugParser:
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styledEcho fgCyan, "Parsing step:"
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for node in tree:
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styledEcho fgGreen, "\t", $node
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echo ""
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compiled = compiler.compile(tree, "stdin")
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when debugCompiler:
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styledEcho fgCyan, "Compilation step:"
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stdout.styledWrite(fgCyan, "\tRaw byte stream: ", fgGreen, "[", fgYellow, compiled.code.join(", "), fgGreen, "]")
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styledEcho fgCyan, "\n\nBytecode disassembler output below:\n"
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disassembleChunk(compiled, "stdin")
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echo ""
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serializer.dumpFile(compiled, input, "stdin", "stdin.pbc")
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serialized = serializer.loadFile("stdin.pbc")
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when debugSerializer:
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var hashMatches = computeSHA256(input).toHex().toLowerAscii() == serialized.fileHash
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styledEcho fgCyan, "Serialization step: "
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styledEcho fgBlue, &"\t- File hash: ", fgYellow, serialized.fileHash, fgBlue, " (", if hashMatches: fgGreen else: fgRed, if hashMatches: "OK" else: "Fail", fgBlue, ")"
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styledEcho fgBlue, "\t- Peon version: ", fgYellow, &"{serialized.peonVer.major}.{serialized.peonVer.minor}.{serialized.peonVer.patch}", fgBlue, " (commit ", fgYellow, serialized.commitHash[0..8], fgBlue, ") on branch ", fgYellow, serialized.peonBranch
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stdout.styledWriteLine(fgBlue, "\t- Compilation date & time: ", fgYellow, fromUnix(serialized.compileDate).format("d/M/yyyy HH:mm:ss"))
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stdout.styledWrite(fgBlue, &"\t- Constants segment: ")
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if serialized.chunk.consts == compiled.consts:
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styledEcho fgGreen, "OK"
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else:
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styledEcho fgRed, "Corrupted"
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stdout.styledWrite(fgBlue, &"\t- Code segment: ")
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if serialized.chunk.code == compiled.code:
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styledEcho fgGreen, "OK"
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else:
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styledEcho fgRed, "Corrupted"
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stdout.styledWrite(fgBlue, "\t- Line info segment: ")
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if serialized.chunk.lines == compiled.lines:
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styledEcho fgGreen, "OK"
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else:
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styledEcho fgRed, "Corrupted"
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when debugRuntime:
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styledEcho fgCyan, "\n\nExecution step: "
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vm.run(serialized.chunk)
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# TODO: The code for error reporting completely
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# breaks down with multiline input, fix it
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except LexingError:
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let lineNo = tokenizer.getLine()
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let relPos = tokenizer.getRelPos(lineNo)
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let line = tokenizer.getSource().splitLines()[lineNo - 1].strip()
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stderr.styledWriteLine(fgRed, "A fatal error occurred while parsing ", fgYellow, &"'{tokenizer.getFile()}'", fgRed, ", module ",
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fgYellow, &"'{tokenizer.getFile()}'", fgRed, ", line ", fgYellow, $lineNo, fgRed, " at ", fgYellow, &"'{tokenizer.peek()}'",
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fgRed, ": ", fgGreen , getCurrentExceptionMsg())
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styledEcho fgBlue, "Source line: " , fgDefault, line
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styledEcho fgCyan, " ".repeat(len("Source line: ")) & "^".repeat(relPos.stop - relPos.start)
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except ParseError:
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let lexeme = parser.getCurrentToken().lexeme
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let lineNo = parser.getCurrentToken().line
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let relPos = tokenizer.getRelPos(lineNo)
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let fn = parser.getCurrentFunction()
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let line = tokenizer.getSource().splitLines()[lineNo - 1].strip()
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var fnMsg = ""
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if fn != nil and fn.kind == funDecl:
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fnMsg &= &"in function '{FunDecl(fn).name.token.lexeme}'"
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stderr.styledWriteLine(fgRed, "A fatal error occurred while parsing ", fgYellow, &"'{parser.getFile()}'", fgRed, ", module ",
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fgYellow, &"'{parser.getFile()}'", fgRed, ", line ", fgYellow, $lineNo, fgRed, " at ", fgYellow, &"'{lexeme}'",
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fgRed, ": ", fgGreen , getCurrentExceptionMsg())
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styledEcho fgBlue, "Source line: " , fgDefault, line
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styledEcho fgCyan, " ".repeat(len("Source line: ")) & "^".repeat(relPos.stop - relPos.start)
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except CompileError:
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let lexeme = compiler.getCurrentNode().token.lexeme
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let lineNo = compiler.getCurrentNode().token.line
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let relPos = tokenizer.getRelPos(lineNo)
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let line = tokenizer.getSource().splitLines()[lineNo - 1].strip()
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var fn = compiler.getCurrentFunction()
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var fnMsg = ""
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if fn != nil and fn.kind == funDecl:
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fnMsg &= &"in function '{FunDecl(fn).name.token.lexeme}'"
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stderr.styledWriteLine(fgRed, "A fatal error occurred while compiling ", fgYellow, &"'{compiler.getFile()}'", fgRed, ", module ",
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fgYellow, &"'{compiler.getModule()}'", fgRed, ", line ", fgYellow, $lineNo, fgRed, " at ", fgYellow, &"'{lexeme}'",
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fgRed, ": ", fgGreen , getCurrentExceptionMsg())
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styledEcho fgBlue, "Source line: " , fgDefault, line
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styledEcho fgCyan, " ".repeat(len("Source line: ")) & "^".repeat(relPos.stop - relPos.start)
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except SerializationError:
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stderr.styledWriteLine(fgRed, getCurrentExceptionMsg())
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quit(0)
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proc fillSymbolTable(tokenizer: Lexer) =
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## Initializes the Lexer's symbol
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## table with the builtin symbols
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## and keywords
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# 1-byte symbols
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tokenizer.symbols.addSymbol("{", LeftBrace)
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tokenizer.symbols.addSymbol("}", RightBrace)
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tokenizer.symbols.addSymbol("(", LeftParen)
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tokenizer.symbols.addSymbol(")", RightParen)
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tokenizer.symbols.addSymbol("[", LeftBracket)
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tokenizer.symbols.addSymbol("]", RightBracket)
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tokenizer.symbols.addSymbol(".", Dot)
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tokenizer.symbols.addSymbol(",", Comma)
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tokenizer.symbols.addSymbol(";", Semicolon)
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# Keywords
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tokenizer.symbols.addKeyword("type", TokenType.Type)
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tokenizer.symbols.addKeyword("enum", Enum)
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tokenizer.symbols.addKeyword("case", Case)
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tokenizer.symbols.addKeyword("operator", Operator)
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tokenizer.symbols.addKeyword("generator", Generator)
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tokenizer.symbols.addKeyword("fn", TokenType.Function)
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tokenizer.symbols.addKeyword("coroutine", Coroutine)
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tokenizer.symbols.addKeyword("break", TokenType.Break)
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tokenizer.symbols.addKeyword("continue", Continue)
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tokenizer.symbols.addKeyword("while", While)
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tokenizer.symbols.addKeyword("for", For)
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tokenizer.symbols.addKeyword("foreach", Foreach)
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tokenizer.symbols.addKeyword("if", If)
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tokenizer.symbols.addKeyword("else", Else)
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tokenizer.symbols.addKeyword("await", TokenType.Await)
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tokenizer.symbols.addKeyword("defer", Defer)
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tokenizer.symbols.addKeyword("try", Try)
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tokenizer.symbols.addKeyword("except", Except)
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tokenizer.symbols.addKeyword("finally", Finally)
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tokenizer.symbols.addKeyword("raise", TokenType.Raise)
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tokenizer.symbols.addKeyword("assert", TokenType.Assert)
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tokenizer.symbols.addKeyword("const", Const)
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tokenizer.symbols.addKeyword("let", Let)
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tokenizer.symbols.addKeyword("var", Var)
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tokenizer.symbols.addKeyword("import", Import)
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tokenizer.symbols.addKeyword("yield", TokenType.Yield)
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tokenizer.symbols.addKeyword("return", TokenType.Return)
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# These are more like expressions with a reserved
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# name that produce a value of a builtin type,
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# but we don't need to care about that until
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# we're in the parsing/ compilation steps so
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# it's fine
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tokenizer.symbols.addKeyword("nan", NotANumber)
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tokenizer.symbols.addKeyword("inf", Infinity)
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tokenizer.symbols.addKeyword("nil", TokenType.Nil)
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tokenizer.symbols.addKeyword("true", True)
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tokenizer.symbols.addKeyword("false", False)
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tokenizer.symbols.addKeyword("ref", Ref)
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tokenizer.symbols.addKeyword("ptr", Ptr)
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for sym in [">", "<", "=", "~", "/", "+", "-", "_", "*", "?", "@", ":"]:
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tokenizer.symbols.addSymbol(sym, Symbol)
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proc getLineEditor: LineEditor =
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result = newLineEditor()
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result.prompt = "=> "
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result.populateDefaults()
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let history = result.plugHistory()
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result.bindHistory(history)
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