From 1ecee352f5844b0809d7ae66df52e34f42b44c8e Mon Sep 17 00:00:00 2001
From: Ben Bridle <ben@derelict.engineering>
Date: Thu, 6 Mar 2025 20:33:27 +1300
Subject: Rewrite entire assembler

The language is now more general, the code is better structured, error
reporting is more detailed, and many new language features have
been implemented:
- conditional blocks
- first-class strings
- more expression operators
- binary literals
- negative values
- invocations in constant expressions
---
 src/parsers/expression.rs | 52 -----------------------------------------------
 1 file changed, 52 deletions(-)
 delete mode 100644 src/parsers/expression.rs

(limited to 'src/parsers/expression.rs')

diff --git a/src/parsers/expression.rs b/src/parsers/expression.rs
deleted file mode 100644
index e938881..0000000
--- a/src/parsers/expression.rs
+++ /dev/null
@@ -1,52 +0,0 @@
-use crate::*;
-
-
-pub fn parse_constant_expression(mut t: Tokeniser, source: SourceSpan) -> Expression {
-    use ExpressionTokenVariant as TokenVar;
-    use ExpressionParseError as ParseError;
-
-    let mut tokens = Vec::new();
-
-    loop {
-        t.eat_whitespace();
-        t.mark_start();
-        let token = t.eat_token();
-        if token.is_empty() {
-            break;
-        }
-
-        let variant = match token.as_str() {
-            "=" => TokenVar::Operator(Operator::Equal),
-            "!=" => TokenVar::Operator(Operator::NotEqual),
-            "<" => TokenVar::Operator(Operator::LessThan),
-            ">" => TokenVar::Operator(Operator::GreaterThan),
-            "<=" => TokenVar::Operator(Operator::LessThanEqual),
-            ">=" => TokenVar::Operator(Operator::GreaterThanEqual),
-            "+" => TokenVar::Operator(Operator::Add),
-            "-" => TokenVar::Operator(Operator::Subtract),
-            "<<" => TokenVar::Operator(Operator::LeftShift),
-            ">>" => TokenVar::Operator(Operator::RightShift),
-            "&" => TokenVar::Operator(Operator::And),
-            "|" => TokenVar::Operator(Operator::Or),
-            "^" => TokenVar::Operator(Operator::Xor),
-            "~" => TokenVar::Operator(Operator::Not),
-            _ => if let Some(stripped) = token.strip_prefix("0x") {
-                match usize::from_str_radix(stripped, 16) {
-                    Ok(value) => TokenVar::Literal(value as isize),
-                    Err(_) => TokenVar::Error(
-                        ParseError::InvalidHexadecimalLiteral(stripped.to_string())),
-                }
-            } else {
-                match usize::from_str_radix(&token, 10) {
-                    Ok(value) => TokenVar::Literal(value as isize),
-                    Err(_) => TokenVar::Invocation(token.to_string()),
-                }
-            }
-        };
-
-        let source = t.get_source();
-        tokens.push(ExpressionToken { source, variant });
-    }
-
-    return Expression { source, tokens };
-}
-- 
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