Struct IntHandler 

pub struct IntHandler;

Integer validation handler

Validates and canonicalizes integer values with optional range constraints.

Implementations

impl IntHandler

pub fn validate_and_canonicalize( value: &str, range: Option<&[i64; 2]>, field_name: &str, ) -> Result<String>

Validate and canonicalize an integer value with optional range checking

This method performs comprehensive integer validation:

1. Parses the input string as a signed 64-bit integer
2. Validates the value is within the specified range (if configured)
3. Returns the canonical string representation of the integer

Arguments

• value - The string value to validate as an integer
• range - Optional [min, max] range constraint (inclusive bounds)
• field_name - Name of the field being validated (for error messages)

Returns

• Ok(String) - The canonical string representation of the valid integer
• Err(anyhow::Error) - Invalid integer format or out of range

Range Validation

When a range is specified as [min, max], both bounds are inclusive:

• [0, 100] allows values from 0 to 100 (including 0 and 100)
• [1, 10] allows values from 1 to 10 (including 1 and 10)
• No range means any valid integer is accepted