capitalize Lexer.zig correctly

1 files changed, 0 insertions, 99 deletions

diff --git a/src/lexer.zig b/src/lexer.zig
deleted file mode 100644
index 3621a1c..0000000
--- a/src/lexer.zig
+++ /dev/null
@@ -1,99 +0,0 @@
-const std = @import("std");
-
-pub const Token = struct {
-    loc: Location,
-    type: Type,
-
-    pub const Type = enum {
-        left_paren,
-        right_paren,
-        integer_literal,
-        plus,
-        minus,
-        invalid,
-        eof,
-    };
-};
-
-pub const Location = struct {
-    start: usize,
-    end: usize,
-
-    pub fn combine(a: Location, b: Location) Location {
-        std.debug.assert(a.end <= b.start);
-        return .{ .start = @min(a.start, b.start), .end = @max(a.end, b.end) };
-    }
-
-    /// Assumes that the location comes directly from an `integer_literal` token.
-    pub fn getInt(self: Location, file_source: []const u8) u64 {
-        var value: u64 = 0;
-        for (file_source[self.start..self.end]) |c| {
-            std.debug.assert('0' <= c and c <= '9');
-            value = value * 10 + (c - '0');
-        }
-        return value;
-    }
-};
-
-source: []const u8,
-start: usize = 0,
-pos: usize = 0,
-
-pub fn next(self: *Self) ?Token {
-    self.start = self.pos;
-    return s: switch (self.eat() orelse return self.create(.eof)) {
-        '(' => self.create(.left_paren),
-        ')' => self.create(.right_paren),
-        '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' => self.integerLiteral(),
-        '+' => self.create(.plus),
-        '-' => self.create(.minus),
-        ' ' => {
-            self.start = self.pos;
-            continue :s (self.eat() orelse return self.create(.eof));
-        },
-        else => self.create(.invalid),
-    };
-}
-
-fn integerLiteral(self: *Self) Token {
-    var value: ?u64 = self.source[self.start] - '0';
-    while (digitValue(self.peek())) |v| {
-        var nxt: ?u64 = null;
-        if (value) |val|
-            if (std.math.mul(u64, val, 10) catch null) |p|
-                if (std.math.add(u64, p, v) catch null) |s| {
-                    nxt = s;
-                };
-
-        value = nxt;
-        _ = self.eat();
-    }
-    return if (value != null)
-        self.create(.integer_literal)
-    else
-        self.create(.invalid);
-}
-
-fn create(self: *Self, tajp: Token.Type) Token {
-    const start = self.start;
-    return .{ .loc = .{ .start = start, .end = self.pos }, .type = tajp };
-}
-
-fn eat(self: *Self) ?u8 {
-    const token = self.peek();
-    if (token != null) self.pos += 1;
-    return token;
-}
-
-fn peek(self: *Self) ?u8 {
-    return if (self.pos < self.source.len) self.source[self.pos] else null;
-}
-
-const Self = @This();
-
-fn digitValue(c: ?u8) ?u8 {
-    return switch (c orelse return null) {
-        '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' => c.? - '0',
-        else => null,
-    };
-}