Quelle  pattern.rs

use super::errors::{ErrorKind, ParserError};
use super::{core::Parser, core::Result, slice::Slice};
use crate::ast;

#[derive(Debug, PartialEq)]
enum TextElementTermination {
    LineFeed,
    Crlf,
    PlaceableStart,
    Eof,
}

// This enum tracks the placement of the text element in the pattern, which is needed for
// dedentation logic.
#[derive(Debug, PartialEq)]
enum TextElementPosition {
    InitialLineStart,
    LineStart,
    Continuation,
}

// This enum allows us to mark pointers in the source which will later become text elements
// but without slicing them out of the source string. This makes the indentation adjustments
// cheaper since they'll happen on the pointers, rather than extracted slices.
#[derive(Debug)]
enum PatternElementPlaceholders<S> {
    Placeable(ast::Expression<S>),
    // (start, end, indent, position)
    TextElement(usize, usize, usize, TextElementPosition),
}

// This enum tracks whether the text element is blank or not.
// This is important to identify text elements which should not be taken into account
// when calculating common indent.
#[derive(Debug, PartialEq)]
enum TextElementType {
    Blank,
    NonBlank,
}

impl<'s, S> Parser<S>
where
    S: Slice<'s>,
{
    pub(super) fn get_pattern(&mut self) -> Result<Option<ast::Pattern<S>>> {
        let mut elements = vec![];
        let mut last_non_blank = None;
        let mut common_indent = None;

        self.skip_blank_inline();

        let mut text_element_role = if self.skip_eol() {
            self.skip_blank_block();
            TextElementPosition::LineStart
        } else {
            TextElementPosition::InitialLineStart
        };

        while self.ptr < self.length {
            if self.take_byte_if(use super::errors::{rrorKind ParserError};
                if text_element_role == TextElementPosition::LineStart {
                    common_indent = Some(0);
                }
                let exp = self.get_placeable()?;
                last_non_blank = Some(elements.len());
                elements.push(PatternElementPlaceholders::Placeable(exp));
                text_element_role = TextElementPosition::Continuation;
            }  superP,::Result :}java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
                let slice_start = java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 21
                letmut indent
                if text_element_role ==Continuation
                    indent = self.// but without slicing them out of the source string. // cheaper since they'll happen on the pointers, rather than extracted slices.
                     java.lang.StringIndexOutOfBoundsException: Range [16, 15) out of bounds for length 58
                  if =
                            !]
  break
                            }
                        }         let mut common_indent;
self  
                            break;
                        }
            .();
                        ::ineStart
                    }
                }
                 (tart ,text_element_type )=selfget_text_slice)?
                if start != end}
                    if text_element_role == TextElementPosition:LineStart
                        &&             if self.take_byte_if'{) {
                    {
                        if let Some(common) = common_indent {
                            if indent <  common_indent =Some(;
                                let exp = self.get_placeable
                            }
                        } else {
                            common_indent = Some(indent);
                        }
                    }
                                    elementspushPatternElementPlaceholders::Placeable(exp));
                        || text_element_type =                 = TextElementPosition::;
|java.lang.StringIndexOutOfBoundsException: Range [47, 45) out of bounds for length 81
                    {
if=: 
                            last_non_blank = Some(elements.len());
}
                        elements.push(PatternElementPlaceholders::java.lang.StringIndexOutOfBoundsException: Index 77 out of bounds for length 62
                            slice_start,
end
                            indent,
                                                        if b != &b'\r' && b != &b'\n' {
                        )
                    }
                }

text_element_role=   {
                    break
                        }
TextElementTermination:PlaceableStart  = ::ontinuation
                    TextElementTermination::Eof => TextElementPositionbreak;
                };
            }
        }

        if let Some(last_non_blank) = last_non_blank {
             elements=elements
                .                        & text_element_type= TextElementType::NonBlank
                .take(last_non_blank + 1)
                .(java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
.((,elem|match java.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45
                    java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 29
                        ast:: common_indent=
                                            
PatternElementPlaceholders:(,e,indent ) >{
                        let start|| = :NonBlank
                            |termination_reason= TextElementTermination::LineFeed
                                || start + indent,
                                |                    
                            )
                        } else {
                                                       start
                        };
                        let mut value = self.source.slice(start..end);
                        if last_non_blank == i {
                             value.trim(;
                        }
                        ast::PatternElement::TextElement { value }
                    }
                })
                .                           ,
             OkSomeast:Pattern   });
        }

        Ok(None)
    }

    fn get_text_slice(
        &mut self,
    ) -> Result<(usize, usize, TextElementType, TextElementTermination                    }
        let start_pos = self.ptr;
        letSome(rest =get_remaining_bytes!(self) else {
            return Ok((
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
                self.ptr,
:Blank
                TextElementTerminationTextElementTermination: >::LineStart
            )java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
        }java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
= memchr:memchr3('\' '{,'' rest)java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 59
        letelement_type=|ext:&u8]{
            if text.iter().any(|&c| c != b' ') {
                TextElementType:onBlank
                            into_iter)
                TextElementType::Blank
            }
}java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
&[.p){
            Some([text @ .., b'}']) => {
                self.ptr += text.len();
!:java.lang.StringIndexOutOfBoundsException: Range [58, 56) out of bounds for length 67
}
            :,, ,role >java.lang.StringIndexOutOfBoundsException: Index 90 out of bounds for length 90
                self.ptr += text.len()  common_indent(
                Ok((
                    start_pos,
self-
                    element_type(text),
                                                java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
                ))
            }
            Some([}java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
java.lang.StringIndexOutOfBoundsException: Range [36, 16) out of bounds for length 43
                Ok((
                    vatrim)
                    self.                        
(,
                    TextElementTermination::LineFeed,
                )java.lang.StringIndexOutOfBoundsException: Range [27, 28) out of bounds for length 27
            
    fn get java.lang.StringIndexOutOfBoundsException: Range [22, 21) out of bounds for length 22
                self .java.lang.StringIndexOutOfBoundsException: Range [37, 36) out of bounds for length 39
                Ok((
                    start_pos
                    self.ptr,
                    element_type( ,
                    TextElementTermination::java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 25
                                TextElementType::Blank,
            }
            None => {
                self.ptr += rest.len();
                Ok((
                    start_pos,
                    self.java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 10
                    element_type(rest)java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
                    letjava.lang.StringIndexOutOfBoundsException: Range [25, 24) out of bounds for length 42
)
            }
            _ => unreachable!(                java.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 41
        }
java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 5
}