1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153

use crate::lexer::*;
use crate::maybe_byte::*;
use crate::source::buffer::*;
use crate::str_term::str_types::*;
use crate::DiagnosticMessage;
use crate::{lex_states::*, LexState};

pub(crate) trait ParsePercent {
    fn percent_unknown(&mut self, term: &MaybeByte) -> i32;
    fn percent_quotation(&mut self, c: &mut MaybeByte, ptok: usize) -> i32;
    fn parse_percent(&mut self, space_seen: bool, last_state: LexState) -> i32;
}

impl ParsePercent for Lexer {
    fn percent_unknown(&mut self, term: &MaybeByte) -> i32 {
        self.buffer.pushback(term);
        let len = self.multibyte_char_len(self.buffer.pcur);
        if let Some(len) = len {
            self.buffer.pcur += len;
            self.yyerror1(
                DiagnosticMessage::UnknownTypeOfPercentString,
                self.current_range().adjust_end(-1),
            );
        }
        Self::END_OF_INPUT
    }

    fn percent_quotation(&mut self, c: &mut MaybeByte, ptok: usize) -> i32 {
        let term: MaybeByte;
        let mut paren: Option<u8>;

        if c.is_eof() || !c.is_alnum() {
            term = c.clone();
            if !c.is_ascii() {
                return self.percent_unknown(&term);
            }
            *c = MaybeByte::new('Q');
        } else {
            term = self.nextc();
            if term.is_alnum() {
                return self.percent_unknown(&term);
            }
        }

        let mut term = match term.to_option() {
            None => {
                self.compile_error(
                    DiagnosticMessage::UnterminatedQuotedString,
                    self.current_range(),
                );
                return Self::END_OF_INPUT;
            }
            Some(term) => term,
        };

        paren = Some(term);
        if term == b'(' {
            term = b')';
        } else if term == b'[' {
            term = b']';
        } else if term == b'{' {
            term = b'}';
        } else if term == b'<' {
            term = b'>';
        } else {
            paren = None
        }

        self.buffer.ptok = ptok - 1;
        match c.to_option() {
            Some(b'Q') => {
                self.strterm = self.new_strterm(str_dquote, term, paren, None);
                Self::tSTRING_BEG
            }
            Some(b'q') => {
                self.strterm = self.new_strterm(str_squote, term, paren, None);
                Self::tSTRING_BEG
            }
            Some(b'W') => {
                self.strterm = self.new_strterm(str_dword, term, paren, None);
                Self::tWORDS_BEG
            }
            Some(b'w') => {
                self.strterm = self.new_strterm(str_sword, term, paren, None);
                Self::tQWORDS_BEG
            }
            Some(b'I') => {
                self.strterm = self.new_strterm(str_dword, term, paren, None);
                Self::tSYMBOLS_BEG
            }
            Some(b'i') => {
                self.strterm = self.new_strterm(str_sword, term, paren, None);
                Self::tQSYMBOLS_BEG
            }
            Some(b'x') => {
                self.strterm = self.new_strterm(str_xquote, term, paren, None);
                Self::tXSTRING_BEG
            }
            Some(b'r') => {
                self.strterm = self.new_strterm(str_regexp, term, paren, None);
                Self::tREGEXP_BEG
            }
            Some(b's') => {
                self.strterm = self.new_strterm(str_ssym, term, paren, None);
                self.lex_state.set(EXPR_FNAME | EXPR_FITEM);
                Self::tSYMBEG
            }
            _ => {
                self.yyerror1(
                    DiagnosticMessage::UnknownTypeOfPercentString,
                    self.current_range().adjust_end(-1),
                );
                Self::END_OF_INPUT
            }
        }
    }

    fn parse_percent(&mut self, space_seen: bool, last_state: LexState) -> i32 {
        let mut c: MaybeByte;
        let ptok = self.buffer.pcur;

        if self.lex_state.is_beg() {
            c = self.nextc();
            return self.percent_quotation(&mut c, ptok);
        }

        c = self.nextc();
        if c == b'=' {
            self.set_yylval_id("%=");
            self.lex_state.set(EXPR_BEG);
            return Self::tOP_ASGN;
        }
        if self.lex_state.is_spacearg(&c, space_seen)
            || (self.lex_state.is_some(EXPR_FITEM) && c == b's')
        {
            return self.percent_quotation(&mut c, ptok);
        }
        self.lex_state.set(if self.lex_state.is_after_operator() {
            EXPR_ARG
        } else {
            EXPR_BEG
        });
        self.buffer.pushback(&c);
        self.warn_balanced(
            Self::tPERCENT,
            "%%",
            "string literal",
            &c,
            space_seen,
            &last_state,
        )
    }
}