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mal/impls/gnu-smalltalk/printer.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

57 lines
1.9 KiB
Smalltalk

Object subclass: Printer [
Printer class >> prStr: sexp printReadably: printReadably [
sexp type = #fn ifTrue: [ ^'#<fn>' ].
sexp type = #func ifTrue: [ ^'#<func>' ].
sexp type = #true ifTrue: [ ^'true' ].
sexp type = #false ifTrue: [ ^'false' ].
sexp type = #nil ifTrue: [ ^'nil' ].
sexp type = #number ifTrue: [ ^sexp value asString ].
sexp type = #symbol ifTrue: [ ^sexp value asString ].
sexp type = #keyword ifTrue: [ ^':', sexp value ].
sexp type = #string ifTrue: [
printReadably ifTrue: [
^sexp value repr
] ifFalse: [
^sexp value
]
].
sexp type = #list ifTrue: [
^self prList: sexp printReadably: printReadably
starter: '(' ender: ')'
].
sexp type = #vector ifTrue: [
^self prList: sexp printReadably: printReadably
starter: '[' ender: ']'
].
sexp type = #map ifTrue: [
^self prMap: sexp printReadably: printReadably
].
sexp type = #atom ifTrue: [
^'(atom ', (self prStr: sexp value printReadably: printReadably), ')'
].
Error halt: 'unimplemented type'
]
Printer class >> prList: sexp printReadably: printReadably
starter: starter ender: ender [
| items |
items := sexp value collect:
[ :item | self prStr: item printReadably: printReadably ].
^starter, (items join: ' ') , ender
]
Printer class >> prMap: sexp printReadably: printReadably [
| items |
items := sexp value associations collect:
[ :item |
(self prStr: item key printReadably: printReadably), ' ',
(self prStr: item value printReadably: printReadably) ].
^'{', (items join: ' '), '}'
]
]