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mirror of https://github.com/kanaka/mal.git synced 2024-08-17 17:50:24 +03:00
mal/impls/gnu-smalltalk/step1_read_print.st
Joel Martin 8a19f60386 Move implementations into impls/ dir
- Reorder README to have implementation list after "learning tool"
  bullet.

- This also moves tests/ and libs/ into impls. It would be preferrable
  to have these directories at the top level.  However, this causes
  difficulties with the wasm implementations which need pre-open
  directories and have trouble with paths starting with "../../". So
  in lieu of that, symlink those directories to the top-level.

- Move the run_argv_test.sh script into the tests directory for
  general hygiene.
2020-02-10 23:50:16 -06:00

51 lines
1.2 KiB
Smalltalk

String extend [
String >> loadRelative [
| scriptPath scriptDirectory |
scriptPath := thisContext currentFileName.
scriptDirectory := FilePath stripFileNameFor: scriptPath.
FileStream fileIn: (FilePath append: self to: scriptDirectory)
]
]
'readline.st' loadRelative.
'util.st' loadRelative.
'types.st' loadRelative.
'reader.st' loadRelative.
'printer.st' loadRelative.
Object subclass: MAL [
MAL class >> READ: input [
^Reader readStr: input
]
MAL class >> EVAL: sexp [
^sexp
]
MAL class >> PRINT: sexp [
^Printer prStr: sexp printReadably: true
]
MAL class >> rep: input [
^self PRINT: (self EVAL: (self READ: input))
]
]
| input historyFile |
historyFile := '.mal_history'.
ReadLine readHistory: historyFile.
[ input := ReadLine readLine: 'user> '. input isNil ] whileFalse: [
input isEmpty ifFalse: [
ReadLine addHistory: input.
ReadLine writeHistory: historyFile.
[ (MAL rep: input) displayNl ]
on: MALEmptyInput do: [ #return ]
on: MALError do:
[ :err | ('error: ', err messageText) displayNl. #return ].
]
]
'' displayNl.