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feat: support symbolized operators

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This commit is contained in:
Shunsuke Shibayama 2023-09-09 16:45:24 +09:00
parent 64874f4169
commit 21cb0bb4c1
5 changed files with 187 additions and 147 deletions
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17
crates/erg_parser/lex.rs
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@ -277,18 +277,17 @@ impl Lexer /*<'a>*/ {
matches!(
s,
"+_" | "_+_"
| "-_"
| "-"
| "*"
| "/"
| "//"
| "**"
| "%"
| ".."
| "..="
| "~"
| "&&"
| "||"
| "^^"
| "^"
| ">>"
| "<<"
| "=="
@ -1544,12 +1543,14 @@ impl Iterator for Lexer /*<'a>*/ {
}
}
// Symbolized operators (シンボル化された演算子)
// e.g. `-`(l, r) = l + (-r)
// e.g. `-`(l, r) == __sub__(1, r) == l - r
Some('`') => {
let mut op = "".to_string();
while let Some(c) = self.consume() {
if c == '`' {
if Self::is_definable_operator(&op[..]) {
op.insert(0, '`');
op.push('`');
return self.accept(Symbol, &op);
} else {
let token = self.emit_token(Illegal, &op);
@ -1569,10 +1570,10 @@ impl Iterator for Lexer /*<'a>*/ {
line!() as usize,
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),
"japanese" => format!("`{}`は存在しないか、ユーザー定義できません", &token.content),
"simplified_chinese" => format!("`{}`不存在或不能由用户定义", &token.content),
"traditional_chinese" => format!("`{}`不存在或不能由用戶定義", &token.content),
"english" => format!("`{}` does not exist or cannot be defined by user", &token.content),
),
hint,
)));