aldrin-parser 0.13.0

Aldrin schema parser library.
Documentation 
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use super::{Error, ErrorKind};
use crate::ast::ConstValue;
use crate::diag::{Diagnostic, DiagnosticKind, Renderer};
use crate::validate::Validate;
use crate::Parser;

#[derive(Debug)]
pub(crate) struct InvalidConstValue {
    schema_name: String,
    const_value: ConstValue,
}

impl InvalidConstValue {
    pub(crate) fn validate(const_value: &ConstValue, validate: &mut Validate) {
        let is_err = match const_value {
            ConstValue::U8(v) => v.value().parse::<u8>().is_err(),
            ConstValue::I8(v) => v.value().parse::<i8>().is_err(),
            ConstValue::U16(v) => v.value().parse::<u16>().is_err(),
            ConstValue::I16(v) => v.value().parse::<i16>().is_err(),
            ConstValue::U32(v) => v.value().parse::<u32>().is_err(),
            ConstValue::I32(v) => v.value().parse::<i32>().is_err(),
            ConstValue::U64(v) => v.value().parse::<u64>().is_err(),
            ConstValue::I64(v) => v.value().parse::<i64>().is_err(),
            ConstValue::String(_) | ConstValue::Uuid(_) => false,
        };

        if is_err {
            validate.add_error(Self {
                schema_name: validate.schema_name().to_owned(),
                const_value: const_value.clone(),
            });
        }
    }
}

impl Diagnostic for InvalidConstValue {
    fn kind(&self) -> DiagnosticKind {
        DiagnosticKind::Error
    }

    fn schema_name(&self) -> &str {
        &self.schema_name
    }

    fn render(&self, renderer: &Renderer, parser: &Parser) -> String {
        let (kind, value, min, max) = match self.const_value {
            ConstValue::U8(ref v) => ("u8", v, u8::MIN as i64, u8::MAX as u64),
            ConstValue::I8(ref v) => ("i8", v, i8::MIN as i64, i8::MAX as u64),
            ConstValue::U16(ref v) => ("u16", v, u16::MIN as i64, u16::MAX as u64),
            ConstValue::I16(ref v) => ("i16", v, i16::MIN as i64, i16::MAX as u64),
            ConstValue::U32(ref v) => ("u32", v, u32::MIN as i64, u32::MAX as u64),
            ConstValue::I32(ref v) => ("i32", v, i32::MIN as i64, i32::MAX as u64),
            ConstValue::U64(ref v) => ("u64", v, u64::MIN as i64, u64::MAX),
            ConstValue::I64(ref v) => ("i64", v, i64::MIN, i64::MAX as u64),
            ConstValue::String(_) | ConstValue::Uuid(_) => unreachable!(),
        };

        let mut report =
            renderer.error(format!("invalid constant {kind} value `{}`", value.value()));

        if let Some(schema) = parser.get_schema(&self.schema_name) {
            report = report.snippet(schema, value.span(), "constant value defined here");
        }

        report = report.help(format!(
            "{kind} values must be in the range from {min} to {max}"
        ));

        report.render()
    }
}

impl From<InvalidConstValue> for Error {
    fn from(e: InvalidConstValue) -> Self {
        Self {
            kind: ErrorKind::InvalidConstValue(e),
        }
    }
}