// Evaluator
func (vm *vm) EvaluateStringInContext(input string, context Value) (Value, error) {
parser.Reset()
lexer := parser.NewLexer(input)
result := parser.RubyParse(lexer)
if result != 0 {
return nil, NewParseError(vm.currentFilename)
}
return vm.executeWithContext(context, parser.Statements...)
}
func (vm *vm) EvaluateStringInContextAndNewStack(input string, context Value) (Value, error) {
parser.Reset()
lexer := parser.NewLexer(input)
result := parser.RubyParse(lexer)
if result != 0 {
return nil, NewParseError(vm.currentFilename)
}
vm.localVariableStack.Unshift()
defer vm.localVariableStack.Shift()
return vm.executeWithContext(context, parser.Statements...)
}
func (vm *vm) Run(input string) (Value, error) {
parser.Reset()
lexer := parser.NewLexer(input)
result := parser.RubyParse(lexer)
if result != 0 {
return nil, NewParseError(vm.currentFilename)
}
main := vm.ObjectSpace["main"]
vm.stack.Unshift("main", vm.currentFilename, 0)
defer vm.stack.Shift()
vm.localVariableStack.Unshift()
defer vm.localVariableStack.Shift()
return vm.executeWithContext(main, parser.Statements...)
}
func main() {
stdin := bufio.NewReader(os.NewFile(0, "stdin"))
for {
fmt.Printf("Give me your best line of ruby: ")
if line, err := stdin.ReadString('\n'); err == nil {
lexer := parser.NewLexer(line)
if parser.RubyParse(lexer) != 0 {
break
}
statements := parser.Statements
fmt.Printf("you typed '%#v'\n", statements[len(statements)-1])
} else {
println("FAIL:", err.Error())
break
}
}
}