75 lines
1.7 KiB
Zig
75 lines
1.7 KiB
Zig
const std = @import("std");
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const scanners = @import("scanners.zig");
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pub const Result = enum {
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Ok,
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TokenizeError,
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ParseError,
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CompileError,
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};
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pub fn run(allocator: *std.mem.Allocator, slice: []const u8) Result {
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var scan = scanners.Scanner.init(allocator, slice);
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//defer scan.deinit();
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// do a full scan pass, then reset, then do it again (with parser)
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while (true) {
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var tok_opt = scan.nextToken() catch |err| {
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std.debug.warn(
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"error at '{}': {}\n",
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scan.currentLexeme(),
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err,
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);
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return Result.TokenizeError;
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};
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if (tok_opt) |tok| {
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if (tok.typ == .EOF) break;
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// TODO remove
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std.debug.warn("{x}\n", tok);
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}
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}
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// scan.reset();
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//var parser = parsers.Parser.init(allocator, scan);
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//defer parser.deinit();
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return Result.Ok;
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}
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pub fn main() anyerror!void {
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const allocator = std.heap.direct_allocator;
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var args_it = std.process.args();
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_ = args_it.skip();
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const filepath = try (args_it.next(allocator) orelse @panic("expected file path"));
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var file = try std.fs.File.openRead(filepath);
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defer file.close();
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const total_bytes = try file.getEndPos();
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var slice = try allocator.alloc(u8, total_bytes);
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defer allocator.free(slice);
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_ = try file.read(slice);
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const result = run(allocator, slice);
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//const result = try run(allocator, slice);
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switch (result) {
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.Ok => std.os.exit(0),
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.TokenizeError,
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.ParseError,
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.CompileError,
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=> {
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std.debug.warn("error: {}\n", result);
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std.os.exit(1);
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},
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}
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}
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