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Merge remote-tracking branch 'origin/main' into https-packages

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This commit is contained in:
Richard Feldman 2022-11-24 19:14:31 -05:00
commit 99f55d6ed6
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50 changed files with 878 additions and 353 deletions
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3
crates/ast/src/lang/core/types.rs
View File

@ -405,6 +405,9 @@ pub fn to_type2<'a>(
Type2::Variable(var)
}
Tuple { fields: _, ext: _ } => {
todo!("tuple type");
}
Record { fields, ext, .. } => {
let field_types_map =
can_assigned_fields(env, scope, references, &fields.items, region);

49
crates/cli/tests/cli_run.rs
View File

@ -1056,50 +1056,29 @@ mod cli_run {
&[],
indoc!(
r#"
── TYPE MISMATCH ─ ...known_bad/../../../../examples/cli/cli-platform/main.roc ─
── TYPE MISMATCH ─────────────────────────────── tests/known_bad/TypeError.roc ─
Something is off with the type annotation of the main required symbol:
This 2nd argument to attempt has an unexpected type:
2│ requires {} { main : InternalProgram }
^^^^^^^^^^^^^^^
15│> Task.attempt task /result ->
16│> when result is
17│> Ok {} -> Stdout.line "Done!"
18│> # Type mismatch because the File.readUtf8 error case is not handled
19│> Err {} -> Stdout.line "Problem!"
This #UserApp.main value is a:
The argument is an anonymous function of type:
Task.Task {} * [Write [Stdout]]
[Err {}a, Ok {}] -> Task {} *
But the type annotation on main says it should be:
But attempt needs its 2nd argument to be:
InternalProgram.InternalProgram
Tip: Type comparisons between an opaque type are only ever equal if
both types are the same opaque type. Did you mean to create an opaque
type by wrapping it? If I have an opaque type Age := U32 I can create
an instance of this opaque type by doing @Age 23.
── TYPE MISMATCH ─ ...known_bad/../../../../examples/cli/cli-platform/main.roc ─
This 1st argument to toEffect has an unexpected type:
9│ mainForHost = InternalProgram.toEffect main
^^^^
This #UserApp.main value is a:
Task.Task {} * [Write [Stdout]]
But toEffect needs its 1st argument to be:
InternalProgram.InternalProgram
Tip: Type comparisons between an opaque type are only ever equal if
both types are the same opaque type. Did you mean to create an opaque
type by wrapping it? If I have an opaque type Age := U32 I can create
an instance of this opaque type by doing @Age 23.
Result {} [FileReadErr Path.Path InternalFile.ReadErr,
FileReadUtf8Err Path.Path [BadUtf8 Utf8ByteProblem Nat]*]* ->
Task {} *
────────────────────────────────────────────────────────────────────────────────
2 errors and 1 warning found in <ignored for test> ms."#
1 error and 0 warnings found in <ignored for test> ms."#
),
);
}

12
crates/cli/tests/known_bad/TypeError.roc
View File

@ -1,13 +1,19 @@
app "type-error"
packages { pf: "../../../../examples/cli/cli-platform/main.roc" }
imports [pf.Stdout.{ line }, pf.Task.{ await }, pf.Program]
imports [pf.Stdout.{ line }, pf.Task.{ await }, pf.Path, pf.File]
provides [main] to pf
main =
task =
_ <- await (line "a")
_ <- await (line "b")
_ <- await (line "c")
_ <- await (line "d")
_ <- await (File.readUtf8 (Path.fromStr "blah.txt"))
line "e"
# Type mismatch because this line is missing:
# |> Program.quick
Task.attempt task \result ->
when result is
Ok {} -> Stdout.line "Done!"
# Type mismatch because the File.readUtf8 error case is not handled
Err {} -> Stdout.line "Problem!"

6
crates/compiler/can/src/annotation.rs
View File

@ -448,6 +448,9 @@ pub fn find_type_def_symbols(
As(actual, _, _) => {
stack.push(&actual.value);
}
Tuple { fields: _, ext: _ } => {
todo!("find_type_def_symbols: Tuple");
}
Record { fields, ext } => {
let mut inner_stack = Vec::with_capacity(fields.items.len());
@ -869,6 +872,9 @@ fn can_annotation_help(
}
}
Tuple { fields: _, ext: _ } => {
todo!("tuple");
}
Record { fields, ext } => {
let ext_type = can_extension_type(
env,

17
crates/compiler/fmt/src/annotation.rs
View File

@ -176,6 +176,15 @@ impl<'a> Formattable for TypeAnnotation<'a> {
annot.is_multiline() || has_clauses.iter().any(|has| has.is_multiline())
}
Tuple { fields, ext } => {
match ext {
Some(ann) if ann.value.is_multiline() => return true,
_ => {}
}
fields.items.iter().any(|field| field.value.is_multiline())
}
Record { fields, ext } => {
match ext {
Some(ann) if ann.value.is_multiline() => return true,
@ -297,6 +306,14 @@ impl<'a> Formattable for TypeAnnotation<'a> {
}
}
Tuple { fields, ext } => {
fmt_collection(buf, indent, Braces::Round, *fields, newlines);
if let Some(loc_ext_ann) = *ext {
loc_ext_ann.value.format(buf, indent);
}
}
Record { fields, ext } => {
fmt_collection(buf, indent, Braces::Curly, *fields, newlines);

4
crates/compiler/fmt/src/spaces.rs
View File

@ -787,6 +787,10 @@ impl<'a> RemoveSpaces<'a> for TypeAnnotation<'a> {
vars: vars.remove_spaces(arena),
},
),
TypeAnnotation::Tuple { fields, ext } => TypeAnnotation::Tuple {
fields: fields.remove_spaces(arena),
ext: ext.remove_spaces(arena),
},
TypeAnnotation::Record { fields, ext } => TypeAnnotation::Record {
fields: fields.remove_spaces(arena),
ext: ext.remove_spaces(arena),

7
crates/compiler/parse/src/ast.rs
View File

@ -533,6 +533,13 @@ pub enum TypeAnnotation<'a> {
ext: Option<&'a Loc<TypeAnnotation<'a>>>,
},
Tuple {
fields: Collection<'a, Loc<TypeAnnotation<'a>>>,
/// The row type variable in an open record, e.g. the `r` in `{ name: Str }r`.
/// This is None if it's a closed record annotation like `{ name: Str }`.
ext: Option<&'a Loc<TypeAnnotation<'a>>>,
},
/// A tag union, e.g. `[
TagUnion {
/// The row type variable in an open tag union, e.g. the `a` in `[Foo, Bar]a`.

3
crates/compiler/parse/src/parser.rs
View File

@ -676,6 +676,9 @@ pub enum ETypeTagUnion<'a> {
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum ETypeInParens<'a> {
/// e.g. (), which isn't a valid type
Empty(Position),
End(Position),
Open(Position),
///

68
crates/compiler/parse/src/type_annotation.rs
View File

@ -116,7 +116,7 @@ fn term<'a>(stop_at_surface_has: bool) -> impl Parser<'a, Loc<TypeAnnotation<'a>
one_of!(
loc_wildcard(),
loc_inferred(),
specialize(EType::TInParens, loc_type_in_parens()),
specialize(EType::TInParens, loc_type_in_parens(stop_at_surface_has)),
loc!(specialize(EType::TRecord, record_type(stop_at_surface_has))),
loc!(specialize(
EType::TTagUnion,
@ -185,7 +185,7 @@ fn loc_applied_arg<'a>(
one_of!(
loc_wildcard(),
loc_inferred(),
specialize(EType::TInParens, loc_type_in_parens()),
specialize(EType::TInParens, loc_type_in_parens(stop_at_surface_has)),
loc!(specialize(EType::TRecord, record_type(stop_at_surface_has))),
loc!(specialize(
EType::TTagUnion,
@ -206,16 +206,45 @@ fn loc_applied_arg<'a>(
)
}
fn loc_type_in_parens<'a>() -> impl Parser<'a, Loc<TypeAnnotation<'a>>, ETypeInParens<'a>> {
between!(
fn loc_type_in_parens<'a>(
stop_at_surface_has: bool,
) -> impl Parser<'a, Loc<TypeAnnotation<'a>>, ETypeInParens<'a>> {
then(
loc!(and!(
collection_trailing_sep_e!(
word1(b'(', ETypeInParens::Open),
space0_around_ee(
specialize_ref(ETypeInParens::Type, expression(true, false)),
ETypeInParens::IndentOpen,
word1(b',', ETypeInParens::End),
word1(b')', ETypeInParens::End),
ETypeInParens::Open,
ETypeInParens::IndentEnd,
TypeAnnotation::SpaceBefore
),
word1(b')', ETypeInParens::IndentEnd)
optional(allocated(specialize_ref(
ETypeInParens::Type,
term(stop_at_surface_has)
)))
)),
|_arena, state, progress, item| {
let Loc {
region,
value: (fields, ext),
} = item;
if fields.len() > 1 || ext.is_some() {
Ok((
MadeProgress,
Loc::at(region, TypeAnnotation::Tuple { fields, ext }),
state,
))
} else if fields.len() == 1 {
Ok((MadeProgress, fields.items[0], state))
} else {
debug_assert!(fields.is_empty());
Err((progress, ETypeInParens::Empty(state.pos())))
}
},
)
.trace("type_annotation:type_in_parens")
}
#[inline(always)]
@ -322,29 +351,24 @@ fn record_type_field<'a>() -> impl Parser<'a, AssignedField<'a, TypeAnnotation<'
fn record_type<'a>(
stop_at_surface_has: bool,
) -> impl Parser<'a, TypeAnnotation<'a>, ETypeRecord<'a>> {
use crate::type_annotation::TypeAnnotation::*;
(move |arena, state, min_indent| {
let (_, fields, state) = collection_trailing_sep_e!(
// word1_check_indent!(b'{', TRecord::Open, min_indent, TRecord::IndentOpen),
map!(
and!(
collection_trailing_sep_e!(
word1(b'{', ETypeRecord::Open),
loc!(record_type_field()),
word1(b',', ETypeRecord::End),
// word1_check_indent!(b'}', TRecord::End, min_indent, TRecord::IndentEnd),
word1(b'}', ETypeRecord::End),
ETypeRecord::Open,
ETypeRecord::IndentEnd,
AssignedField::SpaceBefore
),
optional(allocated(specialize_ref(
ETypeRecord::Type,
term(stop_at_surface_has)
)))
),
|(fields, ext)| { TypeAnnotation::Record { fields, ext } }
)
.parse(arena, state, min_indent)?;
let field_term = specialize_ref(ETypeRecord::Type, term(stop_at_surface_has));
let (_, ext, state) = optional(allocated(field_term)).parse(arena, state, min_indent)?;
let result = Record { fields, ext };
Ok((MadeProgress, result, state))
})
.trace("type_annotation:record_type")
}

4
crates/compiler/parse/tests/snapshots/pass/function_with_tuple_ext_type.expr.formatted.roc Normal file
View File

@ -0,0 +1,4 @@
f : (Str)a -> (Str)a
f = \x -> x
f ("Str", 42)

136
crates/compiler/parse/tests/snapshots/pass/function_with_tuple_ext_type.expr.result-ast Normal file
View File

@ -0,0 +1,136 @@
Defs(
Defs {
tags: [
Index(2147483649),
],
regions: [
@0-32,
],
space_before: [
Slice(start = 0, length = 0),
],
space_after: [
Slice(start = 0, length = 0),
],
spaces: [],
type_defs: [],
value_defs: [
Annotation(
@0-1 Identifier(
"f",
),
@4-20 Function(
[
@4-10 Tuple {
fields: [
@5-8 Apply(
"",
"Str",
[],
),
],
ext: Some(
@9-10 BoundVariable(
"a",
),
),
},
],
@14-20 Tuple {
fields: [
@15-18 Apply(
"",
"Str",
[],
),
],
ext: Some(
@19-20 BoundVariable(
"a",
),
),
},
),
),
AnnotatedBody {
ann_pattern: @0-1 Identifier(
"f",
),
ann_type: @4-20 Function(
[
@4-10 Tuple {
fields: [
@5-8 Apply(
"",
"Str",
[],
),
],
ext: Some(
@9-10 BoundVariable(
"a",
),
),
},
],
@14-20 Tuple {
fields: [
@15-18 Apply(
"",
"Str",
[],
),
],
ext: Some(
@19-20 BoundVariable(
"a",
),
),
},
),
comment: None,
body_pattern: @21-22 Identifier(
"f",
),
body_expr: @25-32 Closure(
[
@26-27 Identifier(
"x",
),
],
@31-32 Var {
module_name: "",
ident: "x",
},
),
},
],
},
@34-47 SpaceBefore(
Apply(
@34-35 Var {
module_name: "",
ident: "f",
},
[
@36-47 Tuple(
[
@37-42 Str(
PlainLine(
"Str",
),
),
@44-46 Num(
"42",
),
],
),
],
Space,
),
[
Newline,
Newline,
],
),
)

4
crates/compiler/parse/tests/snapshots/pass/function_with_tuple_ext_type.expr.roc Normal file
View File

@ -0,0 +1,4 @@
f : (Str)a -> (Str)a
f = \x -> x
f ("Str", 42)

4
crates/compiler/parse/tests/snapshots/pass/function_with_tuple_type.expr.formatted.roc Normal file
View File

@ -0,0 +1,4 @@
f : I64 -> (I64, I64)
f = \x -> (x, x + 1)
f 42

129
crates/compiler/parse/tests/snapshots/pass/function_with_tuple_type.expr.result-ast Normal file
View File

@ -0,0 +1,129 @@
Defs(
Defs {
tags: [
Index(2147483649),
],
regions: [
@0-42,
],
space_before: [
Slice(start = 0, length = 0),
],
space_after: [
Slice(start = 0, length = 0),
],
spaces: [],
type_defs: [],
value_defs: [
Annotation(
@0-1 Identifier(
"f",
),
@4-21 Function(
[
@4-7 Apply(
"",
"I64",
[],
),
],
@11-21 Tuple {
fields: [
@12-15 Apply(
"",
"I64",
[],
),
@17-20 Apply(
"",
"I64",
[],
),
],
ext: None,
},
),
),
AnnotatedBody {
ann_pattern: @0-1 Identifier(
"f",
),
ann_type: @4-21 Function(
[
@4-7 Apply(
"",
"I64",
[],
),
],
@11-21 Tuple {
fields: [
@12-15 Apply(
"",
"I64",
[],
),
@17-20 Apply(
"",
"I64",
[],
),
],
ext: None,
},
),
comment: None,
body_pattern: @22-23 Identifier(
"f",
),
body_expr: @26-42 Closure(
[
@27-28 Identifier(
"x",
),
],
@32-42 Tuple(
[
@33-34 Var {
module_name: "",
ident: "x",
},
@36-41 BinOps(
[
(
@36-37 Var {
module_name: "",
ident: "x",
},
@38-39 Plus,
),
],
@40-41 Num(
"1",
),
),
],
),
),
},
],
},
@44-48 SpaceBefore(
Apply(
@44-45 Var {
module_name: "",
ident: "f",
},
[
@46-48 Num(
"42",
),
],
Space,
),
[
Newline,
Newline,
],
),
)

4
crates/compiler/parse/tests/snapshots/pass/function_with_tuple_type.expr.roc Normal file
View File

@ -0,0 +1,4 @@
f : I64 -> (I64, I64)
f = \x -> (x, x + 1)
f 42

4
crates/compiler/parse/tests/snapshots/pass/tuple_type.expr.formatted.roc Normal file
View File

@ -0,0 +1,4 @@
f : (Str, Str) -> (Str, Str)
f = \x -> x
f (1, 2)

138
crates/compiler/parse/tests/snapshots/pass/tuple_type.expr.result-ast Normal file
View File

@ -0,0 +1,138 @@
Defs(
Defs {
tags: [
Index(2147483649),
],
regions: [
@0-39,
],
space_before: [
Slice(start = 0, length = 0),
],
space_after: [
Slice(start = 0, length = 0),
],
spaces: [],
type_defs: [],
value_defs: [
Annotation(
@0-1 Identifier(
"f",
),
@3-27 Function(
[
@3-13 Tuple {
fields: [
@4-7 Apply(
"",
"Str",
[],
),
@9-12 Apply(
"",
"Str",
[],
),
],
ext: None,
},
],
@17-27 Tuple {
fields: [
@18-21 Apply(
"",
"Str",
[],
),
@23-26 Apply(
"",
"Str",
[],
),
],
ext: None,
},
),
),
AnnotatedBody {
ann_pattern: @0-1 Identifier(
"f",
),
ann_type: @3-27 Function(
[
@3-13 Tuple {
fields: [
@4-7 Apply(
"",
"Str",
[],
),
@9-12 Apply(
"",
"Str",
[],
),
],
ext: None,
},
],
@17-27 Tuple {
fields: [
@18-21 Apply(
"",
"Str",
[],
),
@23-26 Apply(
"",
"Str",
[],
),
],
ext: None,
},
),
comment: None,
body_pattern: @28-29 Identifier(
"f",
),
body_expr: @32-39 Closure(
[
@33-34 Identifier(
"x",
),
],
@38-39 Var {
module_name: "",
ident: "x",
},
),
},
],
},
@41-49 SpaceBefore(
Apply(
@41-42 Var {
module_name: "",
ident: "f",
},
[
@43-49 Tuple(
[
@44-45 Num(
"1",
),
@47-48 Num(
"2",
),
],
),
],
Space,
),
[
Newline,
Newline,
],
),
)

4
crates/compiler/parse/tests/snapshots/pass/tuple_type.expr.roc Normal file
View File

@ -0,0 +1,4 @@
f: (Str, Str) -> (Str, Str)
f = \x -> x
f (1, 2)

4
crates/compiler/parse/tests/snapshots/pass/tuple_type_ext.expr.formatted.roc Normal file
View File

@ -0,0 +1,4 @@
f : (Str, Str)a -> (Str, Str)a
f = \x -> x
f (1, 2)

154
crates/compiler/parse/tests/snapshots/pass/tuple_type_ext.expr.result-ast Normal file
View File

@ -0,0 +1,154 @@
Defs(
Defs {
tags: [
Index(2147483649),
],
regions: [
@0-41,
],
space_before: [
Slice(start = 0, length = 0),
],
space_after: [
Slice(start = 0, length = 0),
],
spaces: [],
type_defs: [],
value_defs: [
Annotation(
@0-1 Identifier(
"f",
),
@3-29 Function(
[
@3-14 Tuple {
fields: [
@4-7 Apply(
"",
"Str",
[],
),
@9-12 Apply(
"",
"Str",
[],
),
],
ext: Some(
@13-14 BoundVariable(
"a",
),
),
},
],
@18-29 Tuple {
fields: [
@19-22 Apply(
"",
"Str",
[],
),
@24-27 Apply(
"",
"Str",
[],
),
],
ext: Some(
@28-29 BoundVariable(
"a",
),
),
},
),
),
AnnotatedBody {
ann_pattern: @0-1 Identifier(
"f",
),
ann_type: @3-29 Function(
[
@3-14 Tuple {
fields: [
@4-7 Apply(
"",
"Str",
[],
),
@9-12 Apply(
"",
"Str",
[],
),
],
ext: Some(
@13-14 BoundVariable(
"a",
),
),
},
],
@18-29 Tuple {
fields: [
@19-22 Apply(
"",
"Str",
[],
),
@24-27 Apply(
"",
"Str",
[],
),
],
ext: Some(
@28-29 BoundVariable(
"a",
),
),
},
),
comment: None,
body_pattern: @30-31 Identifier(
"f",
),
body_expr: @34-41 Closure(
[
@35-36 Identifier(
"x",
),
],
@40-41 Var {
module_name: "",
ident: "x",
},
),
},
],
},
@43-51 SpaceBefore(
Apply(
@43-44 Var {
module_name: "",
ident: "f",
},
[
@45-51 Tuple(
[
@46-47 Num(
"1",
),
@49-50 Num(
"2",
),
],
),
],
Space,
),
[
Newline,
Newline,
],
),
)

4
crates/compiler/parse/tests/snapshots/pass/tuple_type_ext.expr.roc Normal file
View File

@ -0,0 +1,4 @@
f: (Str, Str)a -> (Str, Str)a
f = \x -> x
f (1, 2)

4
crates/compiler/parse/tests/test_parse.rs
View File

@ -187,6 +187,8 @@ mod test_parse {
pass/list_patterns.expr,
pass/lowest_float.expr,
pass/lowest_int.expr,
pass/tuple_type.expr,
pass/tuple_type_ext.expr,
pass/malformed_ident_due_to_underscore.expr,
pass/malformed_pattern_field_access.expr, // See https://github.com/roc-lang/roc/issues/399
pass/malformed_pattern_module_name.expr, // See https://github.com/roc-lang/roc/issues/399
@ -303,6 +305,8 @@ mod test_parse {
pass/when_with_negative_numbers.expr,
pass/when_with_numbers.expr,
pass/when_with_records.expr,
pass/function_with_tuple_type.expr,
pass/function_with_tuple_ext_type.expr,
pass/where_clause_function.expr,
pass/where_clause_multiple_bound_abilities.expr,
pass/where_clause_multiple_has_across_newlines.expr,

21
crates/reporting/src/error/parse.rs
View File

@ -2907,6 +2907,27 @@ fn to_tinparens_report<'a>(
}
}
ETypeInParens::Empty(pos) => {
let surroundings = Region::new(start, pos);
let region = LineColumnRegion::from_pos(lines.convert_pos(pos));
let doc = alloc.stack([
alloc.reflow("I am partway through parsing a parenthesized type:"),
alloc.region_with_subregion(lines.convert_region(surroundings), region),
alloc.concat([
alloc.reflow(r"I was expecting to see an expression next."),
alloc.reflow(r"Note, Roc doesn't use '()' as a null type."),
]),
]);
Report {
filename,
doc,
title: "EMPTY PARENTHESES".to_string(),
severity: Severity::RuntimeError,
}
}
ETypeInParens::End(pos) => {
let surroundings = Region::new(start, pos);
let region = LineColumnRegion::from_pos(lines.convert_pos(pos));

42
crates/reporting/tests/test_reporting.rs
View File

@ -4420,13 +4420,14 @@ Tab characters are not allowed."###,
@r###"
── UNFINISHED PARENTHESES ────────────────── tmp/type_in_parens_start/Test.roc ─
I just started parsing a type in parentheses, but I got stuck here:
I am partway through parsing a type in parentheses, but I got stuck
here:
4│ f : (
^
Tag unions look like [Many I64, None], so I was expecting to see a tag
name next.
I was expecting to see a parenthesis before this, so try adding a )
and see if that helps?
Note: I may be confused by indentation
"###
@ -4446,12 +4447,12 @@ Tab characters are not allowed."###,
here:
4│ f : ( I64
5│
6│
^
I was expecting to see a parenthesis before this, so try adding a )
and see if that helps?
Note: I may be confused by indentation
I was expecting to see a closing parenthesis before this, so try
adding a ) and see if that helps?
"###
);
@ -6063,33 +6064,6 @@ In roc, functions are always written as a lambda, like{}
"###
);
test_report!(
outdented_in_parens,
indoc!(
r#"
Box : (
Str
)
4
"#
),
@r###"
── NEED MORE INDENTATION ──────────────────── tmp/outdented_in_parens/Test.roc ─
I am partway through parsing a type in parentheses, but I got stuck
here:
4│ Box : (
5│ Str
6│ )
^
I need this parenthesis to be indented more. Try adding more spaces
before it!
"###
);
test_report!(
backpassing_type_error,
indoc!(

1
examples/cli/.gitignore vendored
View File

@ -7,3 +7,4 @@ tui
http-get
file-io
env
out.txt

12
examples/cli/args.roc
View File

@ -1,10 +1,11 @@
app "args"
packages { pf: "cli-platform/main.roc" }
imports [pf.Stdout, pf.Arg, pf.Program.{ Program }]
imports [pf.Stdout, pf.Arg, pf.Task.{ Task }, pf.Process]
provides [main] to pf
main : Program
main = Program.withArgs \args ->
main : Task {} []
main =
args <- Arg.list |> Task.await
parser =
divCmd =
Arg.succeed (\dividend -> \divisor -> Div (Num.toF64 dividend) (Num.toF64 divisor))
@ -53,11 +54,10 @@ main = Program.withArgs \args ->
runCmd cmd
|> Num.toStr
|> Stdout.line
|> Program.exit 0
Err helpMenu ->
Stdout.line helpMenu
|> Program.exit 1
{} <- Stdout.line helpMenu |> Task.await
Process.exit 1
runCmd = \cmd ->
when cmd is

10
examples/cli/cli-platform/Arg.roc
View File

@ -14,8 +14,16 @@ interface Arg
choice,
withParser,
program,
list,
]
imports []
imports [Effect, InternalTask, Task.{ Task }]
## Gives a list of the program's command-line arguments.
list : Task (List Str) *
list =
Effect.args
|> Effect.map Ok
|> InternalTask.fromEffect
## A parser for a command-line application.
## A [NamedParser] is usually built from a [Parser] using [program].

6
examples/cli/cli-platform/Dir.roc
View File

@ -9,7 +9,7 @@ DeleteErr : InternalDir.DeleteErr
DirEntry : InternalDir.DirEntry
## Lists the files and directories inside the directory.
list : Path -> Task (List Path) [DirReadErr Path ReadErr] [Read [File]]
list : Path -> Task (List Path) [DirReadErr Path ReadErr]
list = \path ->
effect = Effect.map (Effect.dirList (InternalPath.toBytes path)) \result ->
when result is
@ -19,7 +19,7 @@ list = \path ->
InternalTask.fromEffect effect
## Deletes a directory if it's empty.
deleteEmptyDir : Path -> Task {} [DirDeleteErr Path DeleteErr] [Write [File]]
deleteEmptyDir : Path -> Task {} [DirDeleteErr Path DeleteErr]
## Recursively deletes the directory as well as all files and directories inside it.
deleteRecursive : Path -> Task {} [DirDeleteErr Path DeleteErr] [Write [File]]
deleteRecursive : Path -> Task {} [DirDeleteErr Path DeleteErr]

3
examples/cli/cli-platform/Effect.roc
View File

@ -23,6 +23,7 @@ hosted Effect
fileDelete,
fileWriteUtf8,
fileWriteBytes,
processExit,
]
imports [InternalHttp.{ Request, Response }, InternalFile, InternalDir]
generates Effect with [after, map, always, forever, loop]
@ -43,6 +44,8 @@ envVar : Str -> Effect (Result Str {})
exePath : Effect (Result (List U8) {})
setCwd : List U8 -> Effect (Result {} {})
processExit : U8 -> Effect {}
# If we encounter a Unicode error in any of the args, it will be replaced with
# the Unicode replacement char where necessary.
args : Effect (List Str)

12
examples/cli/cli-platform/Env.roc
View File

@ -4,7 +4,7 @@ interface Env
## Reads the [current working directory](https://en.wikipedia.org/wiki/Working_directory)
## from the environment. File operations on relative [Path]s are relative to this directory.
cwd : Task Path [CwdUnavailable] [Read [Env]]
cwd : Task Path [CwdUnavailable]
cwd =
effect = Effect.map Effect.cwd \bytes ->
if List.isEmpty bytes then
@ -17,14 +17,14 @@ cwd =
## Sets the [current working directory](https://en.wikipedia.org/wiki/Working_directory)
## in the environment. After changing it, file operations on relative [Path]s will be relative
## to this directory.
setCwd : Path -> Task {} [InvalidCwd] [Write [Env]]
setCwd : Path -> Task {} [InvalidCwd]
setCwd = \path ->
Effect.setCwd (InternalPath.toBytes path)
|> Effect.map (\result -> Result.mapErr result \{} -> InvalidCwd)
|> InternalTask.fromEffect
## Gets the path to the currently-running executable.
exePath : Task Path [ExePathUnavailable] [Read [Env]]
exePath : Task Path [ExePathUnavailable]
exePath =
effect =
Effect.map Effect.exePath \result ->
@ -39,7 +39,7 @@ exePath =
## If the value is invalid Unicode, the invalid parts will be replaced with the
## [Unicode replacement character](https://unicode.org/glossary/#replacement_character)
## (`<60>`).
var : Str -> Task Str [VarNotFound] [Read [Env]]
var : Str -> Task Str [VarNotFound]
var = \name ->
Effect.envVar name
|> Effect.map (\result -> Result.mapErr result \{} -> VarNotFound)
@ -65,7 +65,7 @@ var = \name ->
## - comma-separated lists (of either strings or numbers), as long as there are no spaces after the commas
##
## Trying to decode into any other types will always fail with a `DecodeErr`.
decode : Str -> Task val [VarNotFound, DecodeErr DecodeError] [Read [Env]] | val has Decoding
decode : Str -> Task val [VarNotFound, DecodeErr DecodeError] | val has Decoding
decode = \name ->
Effect.envVar name
|> Effect.map
@ -83,7 +83,7 @@ decode = \name ->
##
## If any key or value contains invalid Unicode, the [Unicode replacement character](https://unicode.org/glossary/#replacement_character)
## (`<60>`) will be used in place of any parts of keys or values that are invalid Unicode.
dict : Task (Dict Str Str) * [Read [Env]]
dict : Task (Dict Str Str) *
dict =
Effect.envDict
|> Effect.map Ok

19
examples/cli/cli-platform/File.roc
View File

@ -26,7 +26,7 @@ WriteErr : InternalFile.WriteErr
## This opens the file first and closes it after writing to it.
##
## To write unformatted bytes to a file, you can use [File.writeBytes] instead.
write : Path, val, fmt -> Task {} [FileWriteErr Path WriteErr] [Write [File]] | val has Encode.Encoding, fmt has Encode.EncoderFormatting
write : Path, val, fmt -> Task {} [FileWriteErr Path WriteErr] | val has Encode.Encoding, fmt has Encode.EncoderFormatting
write = \path, val, fmt ->
bytes = Encode.toBytes val fmt
@ -41,7 +41,7 @@ write = \path, val, fmt ->
## This opens the file first and closes it after writing to it.
##
## To format data before writing it to a file, you can use [File.write] instead.
writeBytes : Path, List U8 -> Task {} [FileWriteErr Path WriteErr] [Write [File]]
writeBytes : Path, List U8 -> Task {} [FileWriteErr Path WriteErr]
writeBytes = \path, bytes ->
toWriteTask path \pathBytes -> Effect.fileWriteBytes pathBytes bytes
@ -53,7 +53,7 @@ writeBytes = \path, bytes ->
## This opens the file first and closes it after writing to it.
##
## To write unformatted bytes to a file, you can use [File.writeBytes] instead.
writeUtf8 : Path, Str -> Task {} [FileWriteErr Path WriteErr] [Write [File]]
writeUtf8 : Path, Str -> Task {} [FileWriteErr Path WriteErr]
writeUtf8 = \path, str ->
toWriteTask path \bytes -> Effect.fileWriteUtf8 bytes str
@ -73,7 +73,7 @@ writeUtf8 = \path, str ->
##
## On Windows, this will fail when attempting to delete a readonly file; the file's
## readonly permission must be disabled before it can be successfully deleted.
delete : Path -> Task {} [FileWriteErr Path WriteErr] [Write [File]]
delete : Path -> Task {} [FileWriteErr Path WriteErr]
delete = \path ->
toWriteTask path \bytes -> Effect.fileDelete bytes
@ -85,7 +85,7 @@ delete = \path ->
## This opens the file first and closes it after reading its contents.
##
## To read and decode data from a file, you can use `File.read` instead.
readBytes : Path -> Task (List U8) [FileReadErr Path ReadErr] [Read [File]]
readBytes : Path -> Task (List U8) [FileReadErr Path ReadErr]
readBytes = \path ->
toReadTask path \bytes -> Effect.fileReadBytes bytes
@ -100,10 +100,7 @@ readBytes = \path ->
## To read unformatted bytes from a file, you can use [File.readBytes] instead.
readUtf8 :
Path
-> Task
Str
[FileReadErr Path ReadErr, FileReadUtf8Err Path _]
[Read [File]]
-> Task Str [FileReadErr Path ReadErr, FileReadUtf8Err Path _]
readUtf8 = \path ->
effect = Effect.map (Effect.fileReadBytes (InternalPath.toBytes path)) \result ->
when result is
@ -132,14 +129,14 @@ readUtf8 = \path ->
# Err decodingErr -> Err (FileReadDecodeErr decodingErr)
# Err readErr -> Err (FileReadErr readErr)
# InternalTask.fromEffect effect
toWriteTask : Path, (List U8 -> Effect (Result ok err)) -> Task ok [FileWriteErr Path err] [Write [File]]
toWriteTask : Path, (List U8 -> Effect (Result ok err)) -> Task ok [FileWriteErr Path err]
toWriteTask = \path, toEffect ->
InternalPath.toBytes path
|> toEffect
|> InternalTask.fromEffect
|> Task.mapFail \err -> FileWriteErr path err
toReadTask : Path, (List U8 -> Effect (Result ok err)) -> Task ok [FileReadErr Path err] [Read [File]]
toReadTask : Path, (List U8 -> Effect (Result ok err)) -> Task ok [FileReadErr Path err]
toReadTask = \path, toEffect ->
InternalPath.toBytes path
|> toEffect

2
examples/cli/cli-platform/Http.roc
View File

@ -103,7 +103,7 @@ errorToString = \err ->
BadStatus code -> Str.concat "Request failed with status " (Num.toStr code)
BadBody details -> Str.concat "Request failed. Invalid body. " details
send : Request -> Task Str Error [Network [Http]]
send : Request -> Task Str Error
send = \req ->
# TODO: Fix our C ABI codegen so that we don't this Box.box heap allocation
Effect.sendRequest (Box.box req)

11
examples/cli/cli-platform/InternalProgram.roc
View File

@ -1,11 +0,0 @@
interface InternalProgram
exposes [InternalProgram, fromEffect, toEffect]
imports [Effect.{ Effect }]
InternalProgram := Effect U8
fromEffect : Effect U8 -> InternalProgram
fromEffect = @InternalProgram
toEffect : InternalProgram -> Effect U8
toEffect = \@InternalProgram effect -> effect

10
examples/cli/cli-platform/InternalTask.roc
View File

@ -2,16 +2,16 @@ interface InternalTask
exposes [Task, fromEffect, toEffect, succeed, fail]
imports [Effect.{ Effect }]
Task ok err fx := Effect (Result ok err)
Task ok err := Effect (Result ok err)
succeed : ok -> Task ok * *
succeed : ok -> Task ok *
succeed = \ok -> @Task (Effect.always (Ok ok))
fail : err -> Task * err *
fail : err -> Task * err
fail = \err -> @Task (Effect.always (Err err))
fromEffect : Effect (Result ok err) -> Task ok err *
fromEffect : Effect (Result ok err) -> Task ok err
fromEffect = \effect -> @Task effect
toEffect : Task ok err * -> Effect (Result ok err)
toEffect : Task ok err -> Effect (Result ok err)
toEffect = \@Task effect -> effect

13
examples/cli/cli-platform/Process.roc Normal file
View File

@ -0,0 +1,13 @@
interface Process
exposes [exit]
imports [Task.{ Task }, InternalTask, Effect]
## Exit the process with
##
## {} <- Stderr.line "Exiting right now!" |> Task.await
## Process.exit 1
exit : U8 -> Task {} *
exit = \code ->
Effect.processExit code
|> Effect.map \_ -> Ok {}
|> InternalTask.fromEffect

109
examples/cli/cli-platform/Program.roc
View File

@ -1,109 +0,0 @@
interface Program
exposes [Program, ExitCode, noArgs, withArgs, quick, withEnv, exitCode, exit]
imports [Task.{ Task }, InternalProgram.{ InternalProgram }, InternalTask, Effect]
## A [command-line interface](https://en.wikipedia.org/wiki/Command-line_interface) program.
Program : InternalProgram
## An [exit status](https://en.wikipedia.org/wiki/Exit_status) code.
ExitCode := U8
## Converts a [U8] to an [ExitCode].
##
## If you already have a [Task] and want to convert its success type
## from `{}` to [ExitCode], you may find [Program.exit] convenient.
exitCode : U8 -> ExitCode
exitCode = @ExitCode
## Attach an [ExitCode] to a task.
##
## Stderr.line "I hit an error and couldn't continue."
## |> Program.exit 1
##
## Note that this does not terminate the current process! By design, this platform does not have
## a [Task] which terminates the current process. Instead, error handling should be consistently
## done through task failures.
##
## To convert a [U8] directly into an [ExitCode], use [Program.exitCode].
exit : Task {} [] fx, U8 -> Task ExitCode [] fx
exit = \task, code ->
Task.map task \{} -> @ExitCode code
## A program which runs the given task and discards the values it produces on success or failure.
## One use for this is as an introductory [Program] when teaching someone how to use this platform.
##
## If the task succeeds, the program will exit with a [status](https://en.wikipedia.org/wiki/Exit_status)
## of 0. If the task fails, the program will exit with a status of 1.
## If the task crashes, the program will exit with a status of 2.
##
## For a similar program which specifies its exit status explicitly, see [Program.noArgs].
quick : Task * * * -> Program
quick = \task ->
effect =
InternalTask.toEffect task
|> Effect.map \result ->
when result is
Ok _ -> 0
Err _ -> 1
InternalProgram.fromEffect effect
## A program which uses no [command-line arguments](https://en.wikipedia.org/wiki/Command-line_interface#Arguments)
## and specifies an [exit status](https://en.wikipedia.org/wiki/Exit_status) [U8].
##
## Note that the task's failure type must be `[]`. You can satisfy that by handling all
## the task's potential failures using something like [Task.attempt].
##
## For a similar program which does use command-line arguments, see [Program.withArgs].
noArgs : Task ExitCode [] * -> Program
noArgs = \task ->
effect =
InternalTask.toEffect task
|> Effect.map \Ok (@ExitCode u8) -> u8
InternalProgram.fromEffect effect
## A program which uses [command-line arguments](https://en.wikipedia.org/wiki/Command-line_interface#Arguments)
## and specifies an [exit status](https://en.wikipedia.org/wiki/Exit_status) [U8].
##
## Note that the task's failure type must be `[]`. You can satisfy that by handling all
## the task's potential failures using something like [Task.attempt].
##
## If any command-line arguments contain invalid Unicode, the invalid parts will be replaced with
## the [Unicode replacement character](https://unicode.org/glossary/#replacement_character)
## (`<60>`).
withArgs : (List Str -> Task ExitCode [] *) -> Program
withArgs = \toTask ->
effect = Effect.after Effect.args \args ->
toTask args
|> InternalTask.toEffect
|> Effect.map \Ok (@ExitCode u8) -> u8
InternalProgram.fromEffect effect
## A program which uses [command-line arguments](https://en.wikipedia.org/wiki/Command-line_interface#Arguments)
## and a dictionary of [environment variables](https://en.wikipedia.org/wiki/Environment_variable).
##
## This is a combination of [Program.withArgs] and `Env.dict`. Note that the task's failure type
## must be `[]`. You can satisfy that by handling all the task's potential failures using
## something like [Task.attempt].
##
## If any command-line arguments contain invalid Unicode, the invalid parts will be replaced with
## the [Unicode replacement character](https://unicode.org/glossary/#replacement_character)
## (`<60>`).
withEnv : (List Str, Dict Str Str -> Task ExitCode [] *) -> Program
withEnv = \toTask ->
effect =
args <- Effect.args |> Effect.after
dict <- Effect.envDict |> Effect.after
toTask args dict
|> InternalTask.toEffect
|> Effect.map \Ok (@ExitCode u8) -> u8
InternalProgram.fromEffect effect
# ## A combination of [Program.withArgs] and [Env.decodeAll], with the output of [Env.decodeAll]
# ## being passed after the command-line arguments.
# decodedEnv : (List Str, Result env [EnvDecodingFailed Str]* -> Task U8 [] *) -> Program
# | env has Decode

4
examples/cli/cli-platform/Stderr.roc
View File

@ -2,13 +2,13 @@ interface Stderr
exposes [line, write]
imports [Effect, Task.{ Task }, InternalTask]
line : Str -> Task {} * [Write [Stderr]]
line : Str -> Task {} *
line = \str ->
Effect.stderrLine str
|> Effect.map (\_ -> Ok {})
|> InternalTask.fromEffect
write : Str -> Task {} * [Write [Stderr]]
write : Str -> Task {} *
write = \str ->
Effect.stderrWrite str
|> Effect.map (\_ -> Ok {})

2
examples/cli/cli-platform/Stdin.roc
View File

@ -2,7 +2,7 @@ interface Stdin
exposes [line]
imports [Effect, Task.{ Task }, InternalTask]
line : Task Str * [Read [Stdin]]
line : Task Str *
line =
Effect.stdinLine
|> Effect.map Ok

4
examples/cli/cli-platform/Stdout.roc
View File

@ -2,13 +2,13 @@ interface Stdout
exposes [line, write]
imports [Effect, Task.{ Task }, InternalTask]
line : Str -> Task {} * [Write [Stdout]]
line : Str -> Task {} *
line = \str ->
Effect.stdoutLine str
|> Effect.map (\_ -> Ok {})
|> InternalTask.fromEffect
write : Str -> Task {} * [Write [Stdout]]
write : Str -> Task {} *
write = \str ->
Effect.stdoutWrite str
|> Effect.map (\_ -> Ok {})

22
examples/cli/cli-platform/Task.roc
View File

@ -2,9 +2,9 @@ interface Task
exposes [Task, succeed, fail, await, map, mapFail, onFail, attempt, forever, loop, fromResult]
imports [Effect, InternalTask]
Task ok err fx : InternalTask.Task ok err fx
Task ok err : InternalTask.Task ok err
forever : Task val err fx -> Task * err fx
forever : Task val err -> Task * err
forever = \task ->
looper = \{} ->
task
@ -18,7 +18,7 @@ forever = \task ->
Effect.loop {} looper
|> InternalTask.fromEffect
loop : state, (state -> Task [Step state, Done done] err fx) -> Task done err fx
loop : state, (state -> Task [Step state, Done done] err) -> Task done err
loop = \state, step ->
looper = \current ->
step current
@ -33,13 +33,13 @@ loop = \state, step ->
Effect.loop state looper
|> InternalTask.fromEffect
succeed : ok -> Task ok * *
succeed : ok -> Task ok *
succeed = \ok -> InternalTask.succeed ok
fail : err -> Task * err *
fail : err -> Task * err
fail = \err -> InternalTask.fail err
attempt : Task a b fx, (Result a b -> Task c d fx) -> Task c d fx
attempt : Task a b, (Result a b -> Task c d) -> Task c d
attempt = \task, transform ->
effect = Effect.after
(InternalTask.toEffect task)
@ -50,7 +50,7 @@ attempt = \task, transform ->
InternalTask.fromEffect effect
await : Task a err fx, (a -> Task b err fx) -> Task b err fx
await : Task a err, (a -> Task b err) -> Task b err
await = \task, transform ->
effect = Effect.after
(InternalTask.toEffect task)
@ -61,7 +61,7 @@ await = \task, transform ->
InternalTask.fromEffect effect
onFail : Task ok a fx, (a -> Task ok b fx) -> Task ok b fx
onFail : Task ok a, (a -> Task ok b) -> Task ok b
onFail = \task, transform ->
effect = Effect.after
(InternalTask.toEffect task)
@ -72,7 +72,7 @@ onFail = \task, transform ->
InternalTask.fromEffect effect
map : Task a err fx, (a -> b) -> Task b err fx
map : Task a err, (a -> b) -> Task b err
map = \task, transform ->
effect = Effect.after
(InternalTask.toEffect task)
@ -83,7 +83,7 @@ map = \task, transform ->
InternalTask.fromEffect effect
mapFail : Task ok a fx, (a -> b) -> Task ok b fx
mapFail : Task ok a, (a -> b) -> Task ok b
mapFail = \task, transform ->
effect = Effect.after
(InternalTask.toEffect task)
@ -95,7 +95,7 @@ mapFail = \task, transform ->
InternalTask.fromEffect effect
## Use a Result among other Tasks by converting it into a Task.
fromResult : Result ok err -> Task ok err *
fromResult : Result ok err -> Task ok err
fromResult = \result ->
when result is
Ok ok -> succeed ok

8
examples/cli/cli-platform/main.roc
View File

@ -1,9 +1,9 @@
platform "cli"
requires {} { main : InternalProgram }
requires {} { main : Task {} [] }
exposes []
packages {}
imports [Effect.{ Effect }, InternalProgram.{ InternalProgram }]
imports [Task.{ Task }]
provides [mainForHost]
mainForHost : Effect U8 as Fx
mainForHost = InternalProgram.toEffect main
mainForHost : Task {} [] as Fx
mainForHost = main

11
examples/cli/cli-platform/src/lib.rs
View File

@ -213,7 +213,7 @@ pub unsafe extern "C" fn roc_memset(dst: *mut c_void, c: i32, n: usize) -> *mut
}
#[no_mangle]
pub extern "C" fn rust_main() -> u8 {
pub extern "C" fn rust_main() {
let size = unsafe { roc_main_size() } as usize;
let layout = Layout::array::<u8>(size).unwrap();
@ -223,11 +223,9 @@ pub extern "C" fn rust_main() -> u8 {
roc_main(buffer);
let exit_code = call_the_closure(buffer);
call_the_closure(buffer);
std::alloc::dealloc(buffer, layout);
exit_code
}
}
@ -287,6 +285,11 @@ pub extern "C" fn roc_fx_setCwd(roc_path: &RocList<u8>) -> RocResult<(), ()> {
}
}
#[no_mangle]
pub extern "C" fn roc_fx_processExit(exit_code: u8) {
std::process::exit(exit_code as i32);
}
#[no_mangle]
pub extern "C" fn roc_fx_exePath(_roc_str: &RocStr) -> RocResult<RocList<u8>, ()> {
match std::env::current_exe() {

2
examples/cli/cli-platform/src/main.rs
View File

@ -1,3 +1,3 @@
fn main() {
std::process::exit(host::rust_main() as _);
host::rust_main();
}

2
examples/cli/countdown.roc
View File

@ -3,7 +3,7 @@ app "countdown"
imports [pf.Stdin, pf.Stdout, pf.Task.{ await, loop, succeed }]
provides [main] to pf
main = \_args ->
main =
_ <- await (Stdout.line "\nLet's count down from 10 together - all you have to do is press <ENTER>.")
_ <- await Stdin.line
loop 10 tick

16
examples/cli/echo.roc
View File

@ -1,18 +1,14 @@
app "echo"
packages { pf: "https://roc-alpha.netlify.app/jDRlAFAA3738vu3-vMpLUoyxtA86Z7CaZneoOKrihbE.tar.br" }
imports [pf.Stdin, pf.Stdout, pf.Task.{ Task }, pf.Program.{ Program, ExitCode }]
packages { pf: "cli-platform/main.roc" }
imports [pf.Stdin, pf.Stdout, pf.Task.{ Task }]
provides [main] to pf
main : Program
main = Program.noArgs mainTask
mainTask : Task ExitCode [] [Read [Stdin], Write [Stdout]]
mainTask =
main : Task {} []
main =
_ <- Task.await (Stdout.line "🗣 Shout into this cave and hear the echo! 👂👂👂")
Task.loop {} (\_ -> Task.map tick Step)
|> Program.exit 0
Task.loop {} \_ -> Task.map tick Step
tick : Task.Task {} [] [Read [Stdin], Write [Stdout]]
tick : Task.Task {} []
tick =
shout <- Task.await Stdin.line
Stdout.line (echo shout)

19
examples/cli/env.roc
View File

@ -1,10 +1,11 @@
app "env"
packages { pf: "cli-platform/main.roc" }
imports [pf.Stdout, pf.Env, pf.Task, pf.Program.{ Program }]
imports [pf.Stdout, pf.Stderr, pf.Env, pf.Task.{ Task }]
provides [main] to pf
main : Program
main : Task {} []
main =
task =
Env.decode "EDITOR"
|> Task.await (\editor -> Stdout.line "Your favorite editor is \(editor)!")
|> Task.await (\{} -> Env.decode "SHLVL")
@ -16,10 +17,14 @@ main =
lvlStr = Num.toStr n
Stdout.line "Your current shell level is \(lvlStr)!")
|> Task.await (\{} -> Env.decode "LETTERS")
|> Task.await
(\letters ->
|> Task.await \{} -> Env.decode "LETTERS"
Task.attempt task \result ->
when result is
Ok letters ->
joinedLetters = Str.joinWith letters " "
Stdout.line "Your favorite letters are: \(joinedLetters)")
|> Program.quick
Stdout.line "Your favorite letters are: \(joinedLetters)"
Err _ ->
Stderr.line "I couldn't find your favorite letters in the environment variables!"

18
examples/cli/file.roc
View File

@ -1,7 +1,7 @@
app "file-io"
packages { pf: "cli-platform/main.roc" }
imports [
pf.Program.{ Program, ExitCode },
pf.Process,
pf.Stdout,
pf.Stderr,
pf.Task.{ Task },
@ -12,11 +12,8 @@ app "file-io"
]
provides [main] to pf
main : Program
main = Program.noArgs mainTask
mainTask : Task ExitCode [] [Write [File, Stdout, Stderr], Read [File, Env]]
mainTask =
main : Task {} []
main =
path = Path.fromStr "out.txt"
task =
cwd <- Env.cwd |> Task.await
@ -34,10 +31,7 @@ mainTask =
Task.attempt task \result ->
when result is
Ok {} ->
Stdout.line "Successfully wrote a string to out.txt"
|> Program.exit 0
Ok {} -> Stdout.line "Successfully wrote a string to out.txt"
Err err ->
msg =
when err is
@ -47,5 +41,5 @@ mainTask =
FileReadErr _ _ -> "Error reading file"
_ -> "Uh oh, there was an error!"
Stderr.line msg
|> Program.exit 1
{} <- Stderr.line msg |> Task.await
Process.exit 1

10
examples/cli/form.roc
View File

@ -1,16 +1,12 @@
app "form"
packages { pf: "cli-platform/main.roc" }
imports [pf.Stdin, pf.Stdout, pf.Task.{ await, Task }, pf.Program.{ Program, ExitCode }]
imports [pf.Stdin, pf.Stdout, pf.Task.{ await, Task }]
provides [main] to pf
main : Program
main = Program.noArgs mainTask
mainTask : Task ExitCode [] [Read [Stdin], Write [Stdout]]
mainTask =
main : Task {} []
main =
_ <- await (Stdout.line "What's your first name?")
firstName <- await Stdin.line
_ <- await (Stdout.line "What's your last name?")
lastName <- await Stdin.line
Stdout.line "Hi, \(firstName) \(lastName)! 👋"
|> Program.exit 0

10
examples/cli/http-get.roc
View File

@ -1,13 +1,10 @@
app "http-get"
packages { pf: "cli-platform/main.roc" }
imports [pf.Http, pf.Task, pf.Stdin, pf.Stdout, pf.Program.{ Program, ExitCode }]
imports [pf.Http, pf.Task.{ Task }, pf.Stdin, pf.Stdout]
provides [main] to pf
main : Program
main = Program.noArgs mainTask
mainTask : Task.Task ExitCode [] [Read [Stdin], Write [Stdout], Network [Http]]
mainTask =
main : Task {} []
main =
_ <- Task.await (Stdout.line "Please enter a URL to fetch")
url <- Task.await Stdin.line
@ -25,4 +22,3 @@ mainTask =
|> Task.await
Stdout.line output
|> Program.exit 0

8
examples/helloWorld.roc
View File

@ -1,11 +1,7 @@
app "helloWorld"
packages { pf: "cli/cli-platform/main.roc" }
imports [pf.Stdout, pf.Program.{ Program }]
imports [pf.Stdout]
provides [main] to pf
main = Program.noArgs mainTask
mainTask =
main =
Stdout.line "Hello, World!"
|> Program.exit 0