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https://github.com/microsoft/regorus.git
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01fc234a33
- `std` feature is enabled by default - By default enable #![no_std] compilation - Import std create if `std` feature is enabled or if testing - Use core, alloc types - Make it clear where std types are being used - In no std, use BTreeMap in place of HashMap. HashMap is not available in no std due to lack of a secure random number generator Note: The project does not yet compile without std feature being specified. But it's really close to being able to do so. Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com>
43 lines
1.5 KiB
Rust
43 lines
1.5 KiB
Rust
// Copyright (c) Microsoft Corporation.
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// Licensed under the MIT License.
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use crate::ast::{Expr, Ref};
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use crate::builtins;
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use crate::builtins::utils::ensure_args_count;
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use crate::lexer::Span;
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use crate::value::Value;
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use crate::*;
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use anyhow::{bail, Result};
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pub fn register(m: &mut builtins::BuiltinsMap<&'static str, builtins::BuiltinFcn>) {
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m.insert("to_number", (to_number, 1));
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}
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fn to_number(span: &Span, params: &[Ref<Expr>], args: &[Value], _strict: bool) -> Result<Value> {
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let name = "to_number";
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ensure_args_count(span, name, params, args, 1)?;
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let span = params[0].span();
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Ok(match &args[0] {
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Value::Null => Value::from(0u64),
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Value::Bool(true) => Value::from(1u64),
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Value::Bool(false) => Value::from(0u64),
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Value::Number(_) => args[0].clone(),
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// Eventhough the doc says that strings are converted using strconv.Atoi golang method,
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// in practice strings seems to be read as json numbers. This means that floating point
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// numbers are read and the string representation is limited to what json allows.
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Value::String(s) => match Value::from_json_str(s) {
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Ok(Value::Number(n)) => Value::Number(n),
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_ => {
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bail!(span.error("could not parse string as number"));
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}
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},
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_ => {
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bail!(
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span.error(format!("`{name}` expects bool/number/string/null argument.").as_str())
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);
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}
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})
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}
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