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stage2: implement sema for @errorToInt and @intToError

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This commit is contained in:
jacob gw
2021-03-26 17:54:41 -04:00
committed by Andrew Kelley
parent f80f8a7a78
commit 0005b34637
10 changed files with 177 additions and 7 deletions
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28
src/Module.zig
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@@ -80,6 +80,9 @@ deletion_set: ArrayListUnmanaged(*Decl) = .{},
/// Error tags and their values, tag names are duped with mod.gpa.
global_error_set: std.StringHashMapUnmanaged(u16) = .{},
/// error u16 -> []const u8 for fast lookups for @intToError at comptime
error_name_list: ArrayListUnmanaged([]const u8) = .{},
/// Keys are fully qualified paths
import_table: std.StringArrayHashMapUnmanaged(*Scope.File) = .{},
@@ -1570,7 +1573,22 @@ pub const SrcLoc = struct {
const token_starts = tree.tokens.items(.start);
return token_starts[tok_index];
},
.node_offset_builtin_call_arg0 => @panic("TODO"),
.node_offset_builtin_call_arg0 => |node_off| {
const decl = src_loc.container.decl;
const tree = decl.container.file_scope.base.tree();
const node_datas = tree.nodes.items(.data);
const node_tags = tree.nodes.items(.tag);
const node = decl.relativeToNodeIndex(node_off);
const param = switch (node_tags[node]) {
.builtin_call_two, .builtin_call_two_comma => node_datas[node].lhs,
.builtin_call, .builtin_call_comma => tree.extra_data[node_datas[node].lhs],
else => unreachable,
};
const main_tokens = tree.nodes.items(.main_token);
const tok_index = main_tokens[param];
const token_starts = tree.tokens.items(.start);
return token_starts[tok_index];
},
.node_offset_builtin_call_arg1 => @panic("TODO"),
.node_offset_builtin_call_argn => unreachable, // Handled specially in `Sema`.
.node_offset_array_access_index => @panic("TODO"),
@@ -1893,6 +1911,8 @@ pub fn deinit(mod: *Module) void {
}
mod.global_error_set.deinit(gpa);
mod.error_name_list.deinit(gpa);
for (mod.import_table.items()) |entry| {
entry.value.destroy(gpa);
}
@@ -3346,10 +3366,12 @@ pub fn getErrorValue(mod: *Module, name: []const u8) !std.StringHashMapUnmanaged
const gop = try mod.global_error_set.getOrPut(mod.gpa, name);
if (gop.found_existing)
return gop.entry.*;
errdefer mod.global_error_set.removeAssertDiscard(name);
errdefer mod.global_error_set.removeAssertDiscard(name);
try mod.error_name_list.ensureCapacity(mod.gpa, mod.error_name_list.items.len + 1);
gop.entry.key = try mod.gpa.dupe(u8, name);
gop.entry.value = @intCast(u16, mod.global_error_set.count() - 1);
gop.entry.value = @intCast(u16, mod.error_name_list.items.len);
mod.error_name_list.appendAssumeCapacity(gop.entry.key);
return gop.entry.*;
}