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Allow string interpolation to work with no packages.

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This commit is contained in:
Stephen Chung 2022-12-27 10:09:40 +08:00
parent 07f522e6d7
commit 7c00b74916
8 changed files with 93 additions and 75 deletions
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1
CHANGELOG.md
View File

@ -10,6 +10,7 @@ Bug fixes
* Integer numbers that are too large to deserialize into `INT` now fall back to `Decimal` or `FLOAT` instead of silently truncating.
* Parsing deeply-nested closures (e.g. `||{||{||{||{||{||{||{...}}}}}}}`) no longer panics but will be confined to the nesting limit.
* Closures containing a single expression are now allowed in `Engine::eval_expression` etc.
* Strings interpolation now works under `Engine::new_raw` without any standard package.
Breaking API changes
--------------------

5
src/engine.rs
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@ -52,11 +52,6 @@ pub const FN_ANONYMOUS: &str = "anon$";
/// function to compare two [`Dynamic`] values.
pub const OP_EQUALS: &str = Token::EqualsTo.literal_syntax();
/// Standard concatenation operator.
///
/// Used primarily to build up interpolated strings.
pub const OP_CONCAT: &str = Token::PlusAssign.literal_syntax();
/// Standard containment testing function.
///
/// The `in` operator is implemented as a call to this function.

79
src/eval/expr.rs
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@ -1,13 +1,14 @@
//! Module defining functions for evaluating an expression.
use super::{Caches, EvalContext, GlobalRuntimeState, Target};
use crate::ast::{Expr, OpAssignment};
use crate::engine::{KEYWORD_THIS, OP_CONCAT};
use crate::ast::Expr;
use crate::engine::KEYWORD_THIS;
use crate::packages::string_basic::{print_with_func, FUNC_TO_STRING};
use crate::types::dynamic::AccessMode;
use crate::{Dynamic, Engine, Position, RhaiResult, RhaiResultOf, Scope, ERR};
use std::num::NonZeroUsize;
use crate::{Dynamic, Engine, RhaiResult, RhaiResultOf, Scope, SmartString, ERR};
#[cfg(feature = "no_std")]
use std::prelude::v1::*;
use std::{fmt::Write, num::NonZeroUsize};
impl Engine {
/// Search for a module within an imports stack.
@ -283,42 +284,43 @@ impl Engine {
// `... ${...} ...`
Expr::InterpolatedString(x, _) => {
let mut concat = self.const_empty_string().into();
let target = &mut concat;
let mut concat = SmartString::new_const();
let mut op_info = OpAssignment::new_op_assignment(OP_CONCAT, Position::NONE);
x.iter()
.try_for_each(|expr| {
let item = self
x.iter().try_for_each(|expr| -> RhaiResultOf<()> {
let item = &mut self
.eval_expr(global, caches, scope, this_ptr.as_deref_mut(), expr)?
.flatten();
let pos = expr.position();
op_info.pos = expr.start_position();
if item.is_string() {
write!(concat, "{item}").unwrap();
} else {
let source = global.source();
let context = &(self, FUNC_TO_STRING, source, &*global, pos).into();
let display = print_with_func(FUNC_TO_STRING, context, item);
write!(concat, "{}", display).unwrap();
}
self.eval_op_assignment(global, caches, &op_info, expr, target, item)
})
.map(|_| concat.take_or_clone())
.and_then(|r| self.check_data_size(r, expr.start_position()))
#[cfg(not(feature = "unchecked"))]
self.throw_on_size((0, 0, concat.len()))
.map_err(|err| err.fill_position(pos))?;
Ok(())
})?;
Ok(self.get_interned_string(concat).into())
}
#[cfg(not(feature = "no_index"))]
Expr::Array(x, ..) => {
let mut array = crate::Array::with_capacity(x.len());
#[cfg(not(feature = "unchecked"))]
let mut total_data_sizes = (0, 0, 0);
x.iter()
.try_fold(
crate::Array::with_capacity(x.len()),
|mut array, item_expr| {
x.iter().try_for_each(|item_expr| -> RhaiResultOf<()> {
let value = self
.eval_expr(
global,
caches,
scope,
this_ptr.as_deref_mut(),
item_expr,
)?
.eval_expr(global, caches, scope, this_ptr.as_deref_mut(), item_expr)?
.flatten();
#[cfg(not(feature = "unchecked"))]
@ -326,7 +328,7 @@ impl Engine {
let val_sizes = value.calc_data_sizes(true);
total_data_sizes = (
total_data_sizes.0 + val_sizes.0,
total_data_sizes.0 + val_sizes.0 + 1,
total_data_sizes.1 + val_sizes.1,
total_data_sizes.2 + val_sizes.2,
);
@ -336,19 +338,21 @@ impl Engine {
array.push(value);
Ok(array)
},
)
.map(Into::into)
Ok(())
})?;
Ok(Dynamic::from_array(array))
}
#[cfg(not(feature = "no_object"))]
Expr::Map(x, ..) => {
let mut map = x.1.clone();
#[cfg(not(feature = "unchecked"))]
let mut total_data_sizes = (0, 0, 0);
x.0.iter()
.try_fold(x.1.clone(), |mut map, (key, value_expr)| {
.try_for_each(|(key, value_expr)| -> RhaiResultOf<()> {
let value = self
.eval_expr(global, caches, scope, this_ptr.as_deref_mut(), value_expr)?
.flatten();
@ -358,7 +362,7 @@ impl Engine {
let delta = value.calc_data_sizes(true);
total_data_sizes = (
total_data_sizes.0 + delta.0,
total_data_sizes.1 + delta.1,
total_data_sizes.1 + delta.1 + 1,
total_data_sizes.2 + delta.2,
);
self.throw_on_size(total_data_sizes)
@ -367,9 +371,10 @@ impl Engine {
*map.get_mut(key.as_str()).unwrap() = value;
Ok(map)
})
.map(Into::into)
Ok(())
})?;
Ok(Dynamic::from_map(map))
}
Expr::And(x, ..) => Ok((self

3
src/eval/stmt.rs
View File

@ -148,7 +148,8 @@ impl Engine {
auto_restore! { let orig_level = global.level; global.level += 1 }
let context = if need_context {
Some((self, op, None, &*global, *op_pos).into())
let source = global.source();
Some((self, op, source, &*global, *op_pos).into())
} else {
None
};

45
src/packages/string_basic.rs
View File

@ -44,7 +44,14 @@ pub fn print_with_func(
result.into_immutable_string().expect("`ImmutableString`")
}
Ok(result) => ctx.engine().map_type_name(result.type_name()).into(),
Err(_) => ctx.engine().map_type_name(value.type_name()).into(),
Err(_) => {
let mut buf = SmartString::new_const();
match fn_name {
FUNC_TO_DEBUG => write!(&mut buf, "{value:?}").unwrap(),
_ => write!(&mut buf, "{value}").unwrap(),
}
ctx.engine().map_type_name(&buf).into()
}
}
}
@ -58,7 +65,9 @@ mod print_debug_functions {
/// Convert the value of the `item` into a string.
#[rhai_fn(name = "to_string", pure)]
pub fn to_string_generic(ctx: NativeCallContext, item: &mut Dynamic) -> ImmutableString {
ctx.engine().map_type_name(&item.to_string()).into()
let mut buf = SmartString::new_const();
write!(&mut buf, "{item}").unwrap();
ctx.engine().map_type_name(&buf).into()
}
/// Convert the value of the `item` into a string in debug format.
#[rhai_fn(name = "debug", pure)]
@ -95,7 +104,9 @@ mod print_debug_functions {
/// Return the character into a string.
#[rhai_fn(name = "print", name = "to_string")]
pub fn print_char(character: char) -> ImmutableString {
character.to_string().into()
let mut buf = SmartString::new_const();
buf.push(character);
buf.into()
}
/// Convert the string into debug format.
#[rhai_fn(name = "debug", name = "to_debug")]
@ -108,13 +119,17 @@ mod print_debug_functions {
/// Convert the function pointer into a string in debug format.
#[rhai_fn(name = "debug", name = "to_debug", pure)]
pub fn debug_fn_ptr(f: &mut FnPtr) -> ImmutableString {
f.to_string().into()
let mut buf = SmartString::new_const();
write!(&mut buf, "{f}").unwrap();
buf.into()
}
/// Return the boolean value into a string.
#[rhai_fn(name = "print", name = "to_string")]
pub fn print_bool(value: bool) -> ImmutableString {
value.to_string().into()
let mut buf = SmartString::new_const();
write!(&mut buf, "{value}").unwrap();
buf.into()
}
/// Convert the boolean value into a string in debug format.
#[rhai_fn(name = "debug", name = "to_debug")]
@ -141,30 +156,32 @@ mod print_debug_functions {
#[cfg(not(feature = "no_float"))]
#[rhai_fn(name = "print", name = "to_string")]
pub fn print_f64(number: f64) -> ImmutableString {
crate::types::FloatWrapper::new(number).to_string().into()
let mut buf = SmartString::new_const();
write!(&mut buf, "{}", crate::types::FloatWrapper::new(number)).unwrap();
buf.into()
}
/// Convert the value of `number` into a string.
#[cfg(not(feature = "no_float"))]
#[rhai_fn(name = "print", name = "to_string")]
pub fn print_f32(number: f32) -> ImmutableString {
crate::types::FloatWrapper::new(number).to_string().into()
let mut buf = SmartString::new_const();
write!(&mut buf, "{}", crate::types::FloatWrapper::new(number)).unwrap();
buf.into()
}
/// Convert the value of `number` into a string.
#[cfg(not(feature = "no_float"))]
#[rhai_fn(name = "debug", name = "to_debug")]
pub fn debug_f64(number: f64) -> ImmutableString {
let number = crate::types::FloatWrapper::new(number);
let mut buf = SmartString::new_const();
write!(&mut buf, "{number:?}").unwrap();
write!(&mut buf, "{:?}", crate::types::FloatWrapper::new(number)).unwrap();
buf.into()
}
/// Convert the value of `number` into a string.
#[cfg(not(feature = "no_float"))]
#[rhai_fn(name = "debug", name = "to_debug")]
pub fn debug_f32(number: f32) -> ImmutableString {
let number = crate::types::FloatWrapper::new(number);
let mut buf = SmartString::new_const();
write!(&mut buf, "{number:?}").unwrap();
write!(&mut buf, "{:?}", crate::types::FloatWrapper::new(number)).unwrap();
buf.into()
}
@ -179,7 +196,7 @@ mod print_debug_functions {
)]
pub fn format_array(ctx: NativeCallContext, array: &mut Array) -> ImmutableString {
let len = array.len();
let mut result = String::with_capacity(len * 5 + 2);
let mut result = SmartString::new_const();
result.push('[');
array.iter_mut().enumerate().for_each(|(i, x)| {
@ -204,12 +221,10 @@ mod print_debug_functions {
)]
pub fn format_map(ctx: NativeCallContext, map: &mut Map) -> ImmutableString {
let len = map.len();
let mut result = String::with_capacity(len * 5 + 3);
let mut result = SmartString::new_const();
result.push_str("#{");
map.iter_mut().enumerate().for_each(|(i, (k, v))| {
use std::fmt::Write;
write!(
result,
"{:?}: {}{}",

2
tests/data_size.rs
View File

@ -175,7 +175,7 @@ fn test_max_array_size() -> Result<(), Box<EvalAltResult>> {
assert_eq!(
engine.eval::<INT>(
"
let x = [1,2,3];
let x = [1,2];
len([x, x, x])
"
)?,

3
tests/string.rs
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@ -332,7 +332,8 @@ fn test_string_split() -> Result<(), Box<EvalAltResult>> {
#[test]
fn test_string_interpolated() -> Result<(), Box<EvalAltResult>> {
let engine = Engine::new();
// Make sure strings interpolation works even under raw
let engine = Engine::new_raw();
assert_eq!(engine.eval::<String>("`${}`")?, "");