willbe 0.34.0

/// Define a private namespace for all its items.
#[ allow( clippy ::std_instead_of_alloc, clippy ::std_instead_of_core ) ]
mod private
{
  #[ allow( unused_imports, clippy ::wildcard_imports ) ]
  use crate ::tool :: *;

  use std ::
  {
  str ::FromStr,
 };
  use error ::
  {
  untyped :: { Error, bail },
  // Result,
 };
  use collection_tools ::collection ::HashMap;
  // Explicit import for Result and its variants for pattern matching
  use std ::result ::Result ::Ok;

  #[ derive( Debug, PartialEq, Eq, Clone ) ]
  /// Parser value enum
  pub enum Value
  {
  /// string value
  String( String ),
  /// int value
  Int( i32 ),
  /// bool value
  Bool( bool ),
 }

  impl FromStr for Value
  {
  type Err = Error;

  fn from_str( s: &str ) -> Result< Self, Self ::Err >
  {
   if let Ok( i ) = s.parse :: < i32 >()
   {
  Ok( Value ::Int( i ) )
 }
   else if let Ok( b ) = s.parse :: < bool >()
   {
  Ok( Value ::Bool( b ) )
 }
   else
   {
  let s = s.trim_matches( '\'' );
  Ok( Value ::String( s.to_string() ) )
 }
 }
 }

  impl From< &Value > for bool
  {
  fn from( value: &Value ) -> Self
  {
   match value
   {
  Value ::Bool( value ) => *value,
  Value ::String( string ) => string == "true",
  Value ::Int( i ) => *i == 1,
 }
 }
 }

  /// Represents the result of parsing.
  #[ derive( Debug, Clone ) ]
   pub enum ParseResult
  {
  /// Named parsing result.
  Named( HashMap< String, Value >),
  /// Positional parsing result.
  Positioning( Vec< Value >)
 }

  impl ParseResult
  {
  /// Converts the parsing result into a vector of values.
  /// ``` rust
  /// use collection_tools ::HashMap;
  /// use willbe ::query :: { ParseResult, Value };
  ///
  /// let params = HashMap ::from( [ ( "v1".to_string(), Value ::Int( 1 ) ), ( "v2".to_string(), Value ::Int( 2 ) ), ( "v3".to_string(), Value ::Int( 3 ) ) ] );
  ///
  /// let result = ParseResult ::Named( params ).into_vec();
  ///
  /// assert!( result.contains( &Value ::Int( 1 ) ) );
  /// assert!( result.contains( &Value ::Int( 2 ) ) );
  /// assert!( result.contains( &Value ::Int( 3 ) ) );
  /// ```
  #[ must_use ]
  pub fn into_vec( self ) -> Vec< Value >
  {
   match self
   {
  ParseResult ::Named( map ) => map.values().cloned().collect(),
  ParseResult ::Positioning( vec ) => vec,
 }
 }

  /// Converts the parsing result into a hashmap, using a vector of names as keys.
  /// ```rust
  ///  use collection_tools ::HashMap;
  ///  use willbe ::query :: { ParseResult, Value };
  ///
  ///  let params = vec![ Value ::Int( 1 ), Value ::Int( 2 ), Value ::Int( 3 ) ];
  ///  let result = ParseResult ::Positioning( params );
  ///
  ///  let named_map = result.clone().into_map( vec![ "var0".into(), "var1".into(),"var2".into() ] );
  ///  let unnamed_map = result.clone().into_map( vec![] );
  ///  let mixed_map = result.clone().into_map( vec![ "var0".into() ] );
  ///  let vec = result.into_vec();
  ///
  ///  assert_eq!( HashMap ::from( [ ( "var0".to_string(), Value ::Int( 1 ) ), ( "var1".to_string(),Value ::Int( 2 ) ), ( "var2".to_string(),Value ::Int( 3 ) ) ] ), named_map );
  ///  assert_eq!( HashMap ::from( [ ( "1".to_string(), Value ::Int( 1 ) ), ( "2".to_string(),Value ::Int( 2 ) ), ( "3".to_string(),Value ::Int( 3 ) ) ] ), unnamed_map );
  ///  assert_eq!( HashMap ::from( [ ( "var0".to_string(), Value ::Int( 1 ) ), ( "1".to_string(),Value ::Int( 2 ) ), ( "2".to_string(),Value ::Int( 3 ) ) ] ), mixed_map );
  /// ```
  #[ allow( clippy ::needless_pass_by_value ) ]
  #[ must_use ]
  pub fn into_map( self, names: Vec< String > ) -> HashMap< String, Value >
  {
   match self
   {
  ParseResult ::Named( map ) => map,
  ParseResult ::Positioning( vec ) =>
  {
   let mut map = HashMap ::new();
   let mut counter = 0;
   for ( index, value ) in vec.into_iter().enumerate() 
   {
  map.insert
  (
   names.get( index ).cloned().unwrap_or_else( || { counter+=1; counter.to_string() } ),
   value
 );
 }
   map
 }
 }
 }
 }

  /// Parses an input string and returns a parsing result.
  /// ```rust
  /// use willbe ::query :: { parse, Value };
  /// use collection_tools ::HashMap;
  ///
  /// assert_eq!( parse( "()" ).unwrap().into_vec(), vec![] );
  ///
  /// let mut expected_map = HashMap ::new();
  /// expected_map.insert( "1".to_string(), Value ::String( "test/test".to_string() ) );
  /// assert_eq!( parse( "('test/test')" ).unwrap().into_map( vec![] ), expected_map );
  ///
  /// let mut expected_map = HashMap ::new();
  /// expected_map.insert( "key".to_string(), Value ::String( r#"hello\'test\'test"#.into() ) );
  /// assert_eq!( parse( r#"{ key: 'hello\'test\'test' }"# ).unwrap().into_map( vec![] ), expected_map );
  /// ```
  ///
  /// # Errors
  /// qqq: doc
  ///
  /// # Panics
  /// qqq: doc
  // qqq: use typed error
  pub fn parse( input_string: &str ) -> error ::untyped ::Result< ParseResult >
  {
  if input_string.len() < 2
  {
   bail!( "Input length should be two or more" )
 }
  if input_string.len() == 2
  {
   return Ok( ParseResult ::Positioning( vec![] ) )
 }
  let start = input_string.chars().next().unwrap();
  let input_string = &input_string[1..input_string.len()-1];
  let params = split_string( input_string );
  let result = match start
  {
   '{' =>
   {
  ParseResult ::Named( parse_to_map( params )? )
 },
   '(' =>
   {
  ParseResult ::Positioning( parse_to_vec( params )? )
 },
   _ => bail!( "Invalid start character" )
 };

  Ok( result )
 }

  fn split_string( input: &str ) -> Vec< String >
  {
  let mut result = Vec ::new();
  let mut start = 0;
  let mut in_quotes = false;
  for ( i, c ) in input.char_indices()
  {
   match c
   {
  '"' | '\'' => in_quotes = !in_quotes,
  ',' if !in_quotes =>
  {
   result.push( input[ start..i ].trim().to_string() );
   start = i + 1;
 }
  _ => {}
 }
 }
  result.push( input[ start.. ].trim().to_string() );
  result
 }

  // qqq: use typed error
  fn parse_to_map(input: Vec< String > ) -> error ::untyped ::Result< HashMap< String, Value > >
  {
  let mut map = HashMap ::new();
  for line in input
  {
   let mut in_quotes = false;
   let mut key = String ::new();
   let mut value = String ::new();
   let mut is_key = true;
   for c in line.chars()
   {
  match c
  {
   '"' | '\'' =>
   {
  in_quotes = !in_quotes;
  if is_key
  {
   key.push( c );
 }
  else
  {
   value.push( c );
 }
 }
   ':' if !in_quotes =>
   {
  is_key = false;
 }
   _ =>
   {
  if is_key
  {
   key.push( c );
 }
  else
  {
   value.push( c );
 }
 }
 }
 }
   if value.trim().is_empty()
   {
  bail!( "Value is missing" )
 }
   map.insert( key.trim().to_string(), Value ::from_str( value.trim() )? );
 }
  Ok( map )
 }

  // qqq: use typed error
  #[ allow( clippy ::unnecessary_wraps ) ]
  fn parse_to_vec( input: Vec< String > ) -> error ::untyped ::Result< Vec< Value > >
  {
  Ok( input.into_iter().filter_map( | w | Value ::from_str( w.trim() ).ok() ).collect() )
 }
}

crate ::mod_interface!
{
  own use parse;
  own use Value;
  own use ParseResult;
}