Enum erg_parser::lex::Interpolation
source · pub enum Interpolation {
SingleLine,
MultiLine,
Not,
}
Variants§
Implementations§
source§impl Interpolation
impl Interpolation
sourcepub const fn is_in(&self) -> bool
pub const fn is_in(&self) -> bool
Examples found in repository?
lex.rs (line 1071)
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fn next(&mut self) -> Option<Self::Item> {
if self.prev_token.is(TokenKind::EOF) {
return None;
}
let indent_dedent = self.lex_space_indent_dedent();
if indent_dedent.is_some() {
return indent_dedent;
}
if let Some('#') = self.peek_cur_ch() {
if let Some('[') = self.peek_next_ch() {
if let Err(e) = self.lex_multi_line_comment() {
return Some(Err(e));
}
}
if let Err(e) = self.lex_comment() {
return Some(Err(e));
}
}
match self.consume() {
Some('(') => self.accept(LParen, "("),
Some(')') => self.accept(RParen, ")"),
Some('[') => self.accept(LSqBr, "["),
Some(']') => self.accept(RSqBr, "]"),
Some('{') => self.accept(LBrace, "{"),
Some('}') => {
if self.interpol_stack.last().unwrap().is_in() {
Some(self.lex_interpolation_mid())
} else {
self.accept(RBrace, "}")
}
}
Some('<') => match self.peek_cur_ch() {
Some('.') => {
self.consume();
if let Some('.') = self.peek_cur_ch() {
self.consume();
match self.peek_cur_ch() {
Some('<') => {
self.consume();
self.accept(Open, "<..<")
}
_ => self.accept(LeftOpen, "<.."),
}
} else {
let token = self.emit_token(Illegal, "<.");
Some(Err(LexError::syntax_error(
0,
token.loc(),
switch_lang!(
"japanese" => "<.という演算子はありません",
"simplified_chinese" => "没有这样的运算符: <.",
"traditional_chinese" => "沒有這樣的運算符: <.",
"english" => "no such operator: <.",
),
None,
)))
}
}
Some('-') => {
self.consume();
self.accept(Inclusion, "<-")
}
Some('=') => {
self.consume();
self.accept(LessEq, "<=")
}
Some('<') => {
self.consume();
self.accept(Shl, "<<")
}
Some(':') => {
self.consume();
self.accept(SubtypeOf, "<:")
}
_ => self.accept(Less, "<"),
},
Some('>') => match self.peek_cur_ch() {
Some('=') => {
self.consume();
self.accept(GreEq, ">=")
}
Some('>') => {
self.consume();
self.accept(Shr, ">>")
}
_ => self.accept(Gre, ">"),
},
Some('.') => match self.peek_cur_ch() {
Some('.') => {
self.consume();
match self.peek_cur_ch() {
Some('<') => {
self.consume();
self.accept(RightOpen, "..<")
}
Some('.') => {
self.consume();
self.accept(EllipsisLit, "...")
}
_ => self.accept(Closed, ".."),
}
}
// prev_token is Symbol => TupleAttribute
// else: RatioLit (e.g. .0)
Some(c) if c.is_ascii_digit() && !self.prev_token.is(Symbol) => {
Some(self.lex_ratio(".".into()))
}
_ => self.accept(Dot, "."),
},
Some(',') => self.accept(Comma, ","),
Some(':') => match self.peek_cur_ch() {
Some(':') => {
self.consume();
self.accept(DblColon, "::")
}
Some('=') => {
self.consume();
self.accept(Walrus, ":=")
}
Some('>') => {
self.consume();
self.accept(SupertypeOf, ":>")
}
_ => self.accept(Colon, ":"),
},
Some(';') => self.accept(Semi, ";"),
Some('&') => {
if let Some('&') = self.peek_cur_ch() {
self.consume();
self.accept(BitAnd, "&&")
} else {
// let kind = if self.is_bin_position().unwrap() { Amper } else { PreAmp };
self.accept(Amper, "&")
}
}
Some('|') => match self.peek_cur_ch() {
Some('|') => {
self.consume();
self.accept(BitOr, "||")
}
Some('>') => {
self.consume();
self.accept(Pipe, "|>")
}
_ => self.accept(VBar, "|"),
},
Some('^') => {
if let Some('^') = self.peek_cur_ch() {
self.consume();
self.accept(BitXor, "^^")
} else {
self.accept(Caret, "^")
}
}
Some('~') => self.accept(PreBitNot, "~"),
// TODO:
Some('$') => self.deny_feature("$", "shared variables"),
Some('@') => self.accept(AtSign, "@"),
Some('=') => match self.peek_cur_ch() {
Some('=') => {
self.consume();
self.accept(DblEq, "==")
}
Some('>') => {
self.consume();
self.accept(ProcArrow, "=>")
}
_ => self.accept(Equal, "="),
},
Some('!') => {
if let Some('=') = self.peek_cur_ch() {
self.consume();
self.accept(NotEq, "!=")
} else {
self.accept(Mutate, "!")
}
}
Some('?') => self.accept(Try, "?"),
Some('+') => {
let kind = match self.is_bin_position() {
Some(true) => Plus,
Some(false) => PrePlus,
None => {
let token = self.emit_token(Illegal, "+");
return Some(Err(LexError::simple_syntax_error(0, token.loc())));
}
};
self.accept(kind, "+")
}
Some('-') => match self.peek_cur_ch() {
Some('>') => {
self.consume();
self.accept(FuncArrow, "->")
}
_ => {
match self.is_bin_position() {
Some(true) => self.accept(Minus, "-"),
Some(false) => {
// IntLit (negative number)
if self
.peek_cur_ch()
.map(|t| t.is_ascii_digit())
.unwrap_or(false)
{
Some(self.lex_num('-'))
} else {
self.accept(PreMinus, "-")
}
}
None => {
let token = self.emit_token(Illegal, "-");
Some(Err(LexError::simple_syntax_error(0, token.loc())))
}
}
}
},
Some('*') => match self.peek_cur_ch() {
Some('*') => {
self.consume();
self.accept(Pow, "**")
}
_ => {
let kind = match self.is_bin_position() {
Some(true) => Star,
_ => {
let token = self.emit_token(Illegal, "*");
return Some(Err(LexError::simple_syntax_error(0, token.loc())));
}
};
self.accept(kind, "*")
}
},
Some('/') => match self.peek_cur_ch() {
Some('/') => {
self.consume();
self.accept(FloorDiv, "//")
}
_ => self.accept(Slash, "/"),
},
Some('%') => self.accept(Mod, "%"),
// Newline
// 改行記号はLexer新規生成時に全て\nにreplaceしてある
Some('\n') => {
let token = self.emit_token(Newline, "\n");
self.lineno_token_starts += 1;
self.col_token_starts = 0;
Some(Ok(token))
}
Some('\t') => {
let token = self.emit_token(Illegal, "\t");
Some(Err(LexError::syntax_error(
0,
token.loc(),
switch_lang!(
"japanese" => "タブ文字は使用できません",
"simplified_chinese" => "不能将制表符用作空格",
"traditional_chinese" => "不能將製表符用作空格",
"english" => "cannot use a tab as a space",
),
Some(
switch_lang!(
"japanese" => "スペース( )を使用してください",
"simplified_chinese" => "使用空格( )",
"traditional_chinese" => "使用空格( )",
"english" => "use spaces ( )",
)
.into(),
),
)))
}
// TODO:
Some('\\') => self.deny_feature("\\", "ignoring line break"),
// Single StrLit and Multi-line StrLit
Some('\"') => {
let c = self.peek_cur_ch();
let next_c = self.peek_next_ch();
match (c, next_c) {
(None, _) => {
let token = self.emit_token(Illegal, "\"");
Some(Err(LexError::syntax_error(
0,
token.loc(),
switch_lang!(
"japanese" => "文字列が\"によって閉じられていません",
"simplified_chinese" => "字符串没有被\"关闭",
"traditional_chinese" => "字符串没有被\"关闭",
"english" => "the string is not closed by \"",
),
None,
)))
}
(Some(c), None) => {
if c == '"' {
self.consume(); // consume second '"'
let token = self.emit_token(StrLit, "\"\"");
Some(Ok(token))
} else {
Some(self.lex_single_str())
}
}
(Some(c), Some(next_c)) => {
if c == '"' && next_c == '"' {
self.consume(); // consume second '"'
self.consume(); // consume third '"'
Some(self.lex_multi_line_str())
} else {
Some(self.lex_single_str())
}
}
}
}
// TODO:
Some('\'') => {
let c = self.peek_cur_ch();
match c {
None => {
let token = self.emit_token(Illegal, "'");
Some(Err(LexError::syntax_error(
0,
token.loc(),
switch_lang!(
"japanese" => "raw識別子が'によって閉じられていません",
"simplified_chinese" => "raw識別子没被'关闭",
"traditional_chinese" => "raw識別字沒被'關閉",
"english" => "raw identifier is not ended with '",
),
None,
)))
}
Some(c) => {
if c == '\'' {
self.consume(); // consume second '\''
let token = self.emit_token(Illegal, "\"\"");
Some(Err(LexError::simple_syntax_error(0, token.loc())))
} else {
Some(self.lex_raw_ident())
}
}
}
}
// Symbolized operators (シンボル化された演算子)
// e.g. `-`(l, r) = l + (-r)
Some('`') => {
let mut op = "".to_string();
while let Some(c) = self.consume() {
if c == '`' {
if Self::is_definable_operator(&op[..]) {
return self.accept(Symbol, &op);
} else {
let token = self.emit_token(Illegal, &op);
let hint = if op.contains('+') {
Some(
switch_lang!(
"japanese" => "二項演算子の+は`_+_`、単項演算子の+は`+_`です",
"simplified_chinese" => "二元运算符+是`_+_`,一元运算符+是`+_`",
"traditional_chinese" => "二元運算符+是`_+_`,一元運算符+是`+_`",
"english" => "the binary operator + is `_+_`, the unary operator + is `+_`",
).into(),
)
} else {
None
};
return Some(Err(LexError::syntax_error(
0,
token.loc(),
switch_lang!(
"japanese" => format!("`{}`はユーザー定義できません", &token.content),
"simplified_chinese" => format!("`{}`不能由用户定义", &token.content),
"traditional_chinese" => format!("`{}`不能由用戶定義", &token.content),
"english" => format!("`{}` cannot be defined by user", &token.content),
),
hint,
)));
}
}
op.push(c);
}
let token = self.emit_token(Illegal, &op);
Some(Err(LexError::syntax_error(
0,
token.loc(),
switch_lang!(
"japanese" => format!("バッククォート(`)が閉じられていません"),
"simplified_chinese" => format!("反引号(`)未关闭"),
"traditional_chinese" => format!("反引號(`)未關閉"),
"english" => format!("back quotes (`) not closed"),
),
None,
)))
}
// IntLit or RatioLit
Some(n) if n.is_ascii_digit() => Some(self.lex_num(n)),
// Symbol (includes '_')
Some(c) if Self::is_valid_start_symbol_ch(c) => Some(self.lex_symbol(c)),
// Invalid character (e.g. space-like character)
Some(invalid) => {
let token = self.emit_token(Illegal, &invalid.to_string());
Some(Err(LexError::syntax_error(
0,
token.loc(),
switch_lang!(
"japanese" => format!("この文字は使用できません: '{invalid}'"),
"simplified_chinese" => format!("无效字符: '{invalid}'"),
"traditional_chinese" => format!("無效字符: '{invalid}'"),
"english" => format!("invalid character: '{invalid}'"),
),
None,
)))
}
None => {
if self.indent_stack.is_empty() {
self.accept(EOF, "")
} else {
self.indent_stack.pop();
self.accept(Dedent, "")
}
}
}
}
Trait Implementations§
source§impl Debug for Interpolation
impl Debug for Interpolation
source§impl PartialEq<Interpolation> for Interpolation
impl PartialEq<Interpolation> for Interpolation
source§fn eq(&self, other: &Interpolation) -> bool
fn eq(&self, other: &Interpolation) -> bool
This method tests for
self
and other
values to be equal, and is used
by ==
.