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56 lines
1.2 KiB
56 lines
1.2 KiB
#!/usr/bin/env ruby -w
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require_relative "lox/ast_printer"
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require_relative "lox/error"
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require_relative "lox/expr"
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require_relative "lox/interpreter"
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require_relative "lox/parser"
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require_relative "lox/scanner"
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require_relative "lox/token"
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module Lox
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class Runner
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def initialize(scanner: Scanner.new, interpreter: Interpreter.new)
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@scanner, @interpreter = scanner, interpreter
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end
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def run(src) = interpret(parse(scan(src)))
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def scan(src) = @scanner.scan(src)
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def parse(tokens) = Parser.new(tokens).parse!
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def interpret(stmts) = @interpreter.interpret(stmts)
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end
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class FileRunner < Runner
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def run(src)
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super
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rescue Lox::ParseError => e
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STDERR.puts e.message
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exit 65
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rescue Lox::RuntimeError => e
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STDERR.puts e.message, "[line #{e.token.line}]"
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exit 70
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end
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end
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class PromptRunner < Runner
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def initialize
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super(interpreter: Interpreter.new(Environment.new))
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end
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def run(src)
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super
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rescue Lox::ParseError, Lox::RuntimeError => e
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STDERR.puts e.message
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end
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def parse(tokens)
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stmts = Parser.new(tokens).parse!
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if stmts.last.instance_of?(Stmt::Expr)
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stmts << Stmt::Print.new(stmts.pop.expr)
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end
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stmts
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end
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end
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end
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