language-servers/roc
1
0
Fork 0
mirror of https://github.com/roc-lang/roc.git synced 2025-09-28 06:14:46 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 6

Constrain string interpolation

Browse source
This commit is contained in:
Richard Feldman 2020-08-29 21:37:46 -04:00
parent 5080a7e24b
commit 274e7e786d
11 changed files with 150 additions and 180 deletions
Download patch file Download diff file Expand all files Collapse all files

34
compiler/constrain/src/expr.rs
View file

@ -199,14 +199,34 @@ pub fn constrain_expr(
exists(vars, And(cons))
}
Str { interpolations, .. } => {
todo!(
"constrain interpolations in a string literal {:?}",
interpolations
);
Str(segments) => {
use crate::builtins::str_type;
use roc_can::expr::StrSegment::*;
// use crate::builtins::{empty_list_type, float_literal, int_literal, list_type, str_type};
// Eq(str_type(), expected, Category::Str, region)
let mut cons = Vec::with_capacity(segments.len() + 1);
let expect_interpolated =
|region| Expected::ForReason(Reason::StrInterpolation, str_type(), region);
for segment in segments {
match segment {
Plaintext(_) => {
// Plaintext strings add no constraints
}
Interpolation(loc_expr) => {
cons.push(constrain_expr(
env,
loc_expr.region,
&loc_expr.value,
expect_interpolated(loc_expr.region),
));
}
}
}
// The expression as a whole should have the type Str.
cons.push(Eq(str_type(), expected, Category::Str, region));
And(cons)
}
List {
elem_var,