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use crate::errors::Error;
use lazy_static::lazy_static;
use regex::Regex;
pub fn has_array_format(element: &str) -> bool {
element.starts_with('[') && element.ends_with(']')
}
pub fn has_tuple_format(element: &str) -> bool {
element.starts_with('(') && element.ends_with(')')
}
pub fn extract_generic_name(field: &str) -> Option<String> {
lazy_static! {
static ref RE: Regex = Regex::new(r"^\s*generic\s+(\S+)\s*$").unwrap();
}
RE.captures(field)
.map(|captures| String::from(&captures[1]))
}
pub fn extract_array_len(field: &str) -> Option<usize> {
lazy_static! {
static ref RE: Regex = Regex::new(r"^\s*\[.+;\s*(\d+)\s*\]\s*$").unwrap();
}
RE.captures(field)
.map(|captures| captures[1].to_string())
.map(|length: String| {
length.parse::<usize>().unwrap_or_else(|_| {
panic!("Could not extract array length from {length}! Original field {field}")
})
})
}
pub fn extract_str_len(field: &str) -> Option<usize> {
lazy_static! {
static ref RE: Regex = Regex::new(r"^\s*str\s*\[\s*(\d+)\s*\]\s*$").unwrap();
}
RE.captures(field)
.map(|captures| captures[1].to_string())
.map(|length: String| {
length.parse::<usize>().unwrap_or_else(|_| {
panic!("Could not extract string length from {length}! Original field '{field}'")
})
})
}
pub fn has_struct_format(field: &str) -> bool {
field.starts_with("struct ")
}
pub fn has_enum_format(field: &str) -> bool {
field.starts_with("enum ")
}
pub fn custom_type_name(type_field: &str) -> Result<String, Error> {
lazy_static! {
static ref RE: Regex = Regex::new(r"(?:struct|enum)\s*(.*)").unwrap();
}
RE.captures(type_field)
.map(|captures| String::from(&captures[1]))
.ok_or_else(|| {
Error::InvalidData(
"The declared type was not in the format `(enum|struct) name`".to_string(),
)
})
}