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feat: Add csharp support #106

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4aaa6f0
Add CSharp support
unliftedq Apr 3, 2026
ac97752
Merge branch 'main' of https://github.com/unliftedq/codedb into add-c…
unliftedq Apr 6, 2026
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240 changes: 230 additions & 10 deletions src/explore.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -77,6 +77,7 @@ pub const Language = enum(u8) {
go_lang,
php,
ruby,
csharp,
markdown,
json,
yaml,
Expand All @@ -94,6 +95,7 @@ pub fn detectLanguage(path: []const u8) Language {
if (std.mem.endsWith(u8, path, ".go")) return .go_lang;
if (std.mem.endsWith(u8, path, ".php")) return .php;
if (std.mem.endsWith(u8, path, ".rb") or std.mem.endsWith(u8, path, ".rake")) return .ruby;
if (std.mem.endsWith(u8, path, ".cs")) return .csharp;
if (std.mem.endsWith(u8, path, ".md")) return .markdown;
if (std.mem.endsWith(u8, path, ".json")) return .json;
if (std.mem.endsWith(u8, path, ".yaml") or std.mem.endsWith(u8, path, ".yml")) return .yaml;
Expand Down Expand Up @@ -263,6 +265,8 @@ fn indexFileInner(self: *Explorer, path: []const u8, content: []const u8, full_i
try self.parseRustLine(trimmed, line_num, &outline, prev_line_trimmed);
} else if (outline.language == .php) {
try self.parsePhpLine(trimmed, line_num, &outline, &php_state);
} else if (outline.language == .csharp) {
try self.parseCSharpLine(trimmed, line_num, &outline);
} else if (outline.language == .go_lang) {
// Handle Go import block: import ( "fmt" \n "net/http" )
if (in_go_import_block) {
Expand Down Expand Up @@ -351,7 +355,6 @@ fn indexFileInner(self: *Explorer, path: []const u8, content: []const u8, full_i
}
}


try self.rebuildDepsFor(stable_path, &outline);

outline_gop.value_ptr.* = outline;
Expand Down Expand Up @@ -1458,14 +1461,11 @@ pub fn getHotFiles(self: *Explorer, store: *Store, allocator: std.mem.Allocator,

fn parseGoLine(self: *Explorer, line: []const u8, line_num: u32, outline: *FileOutline) !void {
const a = self.allocator;
// func name( or func (receiver) name(

if (startsWith(line, "func ")) {
// Skip "func (" for function literals
const rest = line[5..];
// Method with receiver: func (r *Type) Name(
var name_start = rest;
if (rest.len > 0 and rest[0] == '(') {
// Skip past receiver: find ") "
if (std.mem.indexOf(u8, rest, ") ")) |close| {
name_start = rest[close + 2..];
}
Expand All @@ -1486,14 +1486,13 @@ pub fn getHotFiles(self: *Explorer, store: *Store, allocator: std.mem.Allocator,
} else if (startsWith(line, "type ")) {
const rest = line[5..];
if (extractIdent(rest)) |name| {
const kind: SymbolKind = .struct_def;
const name_copy = try a.dupe(u8, name);
errdefer a.free(name_copy);
const detail_copy = try a.dupe(u8, line);
errdefer a.free(detail_copy);
try outline.symbols.append(a, .{
.name = name_copy,
.kind = kind,
.kind = .struct_def,
.line_start = line_num,
.line_end = line_num,
.detail = detail_copy,
Expand Down Expand Up @@ -1534,8 +1533,8 @@ pub fn getHotFiles(self: *Explorer, store: *Store, allocator: std.mem.Allocator,

fn parseRubyLine(self: *Explorer, line: []const u8, line_num: u32, outline: *FileOutline) !void {
const a = self.allocator;

if (startsWith(line, "def ")) {
// Handle "def self.method_name" — skip past "self."
var name_start = line[4..];
if (startsWith(name_start, "self.")) {
name_start = name_start[5..];
Expand Down Expand Up @@ -1598,6 +1597,227 @@ pub fn getHotFiles(self: *Explorer, store: *Store, allocator: std.mem.Allocator,
}
}

fn parseCSharpLine(self: *Explorer, line: []const u8, line_num: u32, outline: *FileOutline) !void {
const a = self.allocator;

if (startsWith(line, "using ")) {
const symbol_copy = try a.dupe(u8, line);
errdefer a.free(symbol_copy);
try outline.symbols.append(a, .{
Comment on lines +1603 to +1606
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P2 Badge Distinguish C# using directives from using statements

The parser treats any line beginning with using as an import and appends it to outline.imports, but C# also uses using for local resource-management statements (using var ... / using (...)). Those common in-method statements will be recorded as dependencies, which corrupts import/dependency data and downstream getImportedBy results for C# files.

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.name = symbol_copy,
.kind = .import,
.line_start = line_num,
.line_end = line_num,
});
const import_copy = try a.dupe(u8, line);
errdefer a.free(import_copy);
try outline.imports.append(a, import_copy);
return;
}

if (startsWith(line, "namespace ")) {
if (extractIdent(line[10..])) |name| {
const name_copy = try a.dupe(u8, name);
errdefer a.free(name_copy);
const detail_copy = try a.dupe(u8, line);
errdefer a.free(detail_copy);
try outline.symbols.append(a, .{
.name = name_copy,
.kind = .import,
.line_start = line_num,
.line_end = line_num,
.detail = detail_copy,
});
}
return;
}

const stripped = stripCSharpModifiers(line);

if (startsWith(stripped, "class ")) {
if (extractIdent(stripped[6..])) |name| {
const name_copy = try a.dupe(u8, name);
errdefer a.free(name_copy);
const detail_copy = try a.dupe(u8, line);
errdefer a.free(detail_copy);
try outline.symbols.append(a, .{
.name = name_copy,
.kind = .struct_def,
.line_start = line_num,
.line_end = line_num,
.detail = detail_copy,
});
}
return;
}

if (startsWith(stripped, "interface ")) {
if (extractIdent(stripped[10..])) |name| {
const name_copy = try a.dupe(u8, name);
errdefer a.free(name_copy);
const detail_copy = try a.dupe(u8, line);
errdefer a.free(detail_copy);
try outline.symbols.append(a, .{
.name = name_copy,
.kind = .trait_def,
.line_start = line_num,
.line_end = line_num,
.detail = detail_copy,
});
}
return;
}

if (startsWith(stripped, "struct ")) {
if (extractIdent(stripped[7..])) |name| {
const name_copy = try a.dupe(u8, name);
errdefer a.free(name_copy);
const detail_copy = try a.dupe(u8, line);
errdefer a.free(detail_copy);
try outline.symbols.append(a, .{
.name = name_copy,
.kind = .struct_def,
.line_start = line_num,
.line_end = line_num,
.detail = detail_copy,
});
}
return;
}

if (startsWith(stripped, "enum ")) {
if (extractIdent(stripped[5..])) |name| {
const name_copy = try a.dupe(u8, name);
errdefer a.free(name_copy);
const detail_copy = try a.dupe(u8, line);
errdefer a.free(detail_copy);
try outline.symbols.append(a, .{
.name = name_copy,
.kind = .enum_def,
.line_start = line_num,
.line_end = line_num,
.detail = detail_copy,
});
}
return;
}

if (startsWith(stripped, "delegate ")) {
if (std.mem.indexOf(u8, stripped, "(")) |paren| {
const before_paren = std.mem.trimRight(u8, stripped[9..paren], " \t");
if (lastIdent(before_paren)) |name| {
const name_copy = try a.dupe(u8, name);
errdefer a.free(name_copy);
const detail_copy = try a.dupe(u8, line);
errdefer a.free(detail_copy);
try outline.symbols.append(a, .{
.name = name_copy,
.kind = .type_alias,
.line_start = line_num,
.line_end = line_num,
.detail = detail_copy,
});
}
}
return;
}

if (startsWith(stripped, "const ")) {
const after = stripped[6..];
if (std.mem.indexOf(u8, after, "=")) |eq| {
const before_eq = std.mem.trimRight(u8, after[0..eq], " \t");
if (lastIdent(before_eq)) |name| {
const name_copy = try a.dupe(u8, name);
errdefer a.free(name_copy);
const detail_copy = try a.dupe(u8, line);
errdefer a.free(detail_copy);
try outline.symbols.append(a, .{
.name = name_copy,
.kind = .constant,
.line_start = line_num,
.line_end = line_num,
.detail = detail_copy,
});
}
}
return;
}

if (std.mem.indexOf(u8, stripped, "(")) |paren| {
if (paren > 0) {
const control = [_][]const u8{ "if ", "if(", "else ", "for ", "for(", "foreach ", "foreach(", "while ", "while(", "switch ", "switch(", "catch ", "catch(", "return ", "return(", "new ", "throw ", "lock ", "lock(" };
Comment on lines +1746 to +1748
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P1 Badge Exclude C# call expressions from method symbol extraction

This branch marks almost any parenthesized C# line as a .method symbol, so ordinary calls like Console.WriteLine(...), LINQ calls, or constructor invocations inside method bodies are indexed as declarations. That will significantly inflate symbol lists and degrade outline/search accuracy on real C# files, even though no new declarations exist on those lines. Method extraction needs a declaration-specific guard instead of relying on ( plus a small control-keyword denylist.

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for (control) |kw| {
if (startsWith(stripped, kw)) return;
}
const before_paren = std.mem.trimRight(u8, stripped[0..paren], " \t");
if (lastIdent(before_paren)) |name| {
if (std.mem.eql(u8, name, "base") or std.mem.eql(u8, name, "this") or std.mem.eql(u8, name, "value")) return;
const name_copy = try a.dupe(u8, name);
errdefer a.free(name_copy);
const detail_copy = try a.dupe(u8, line);
errdefer a.free(detail_copy);
try outline.symbols.append(a, .{
.name = name_copy,
.kind = .method,
.line_start = line_num,
.line_end = line_num,
.detail = detail_copy,
});
}
}
}
}

fn stripCSharpModifiers(line: []const u8) []const u8 {
const modifiers = [_][]const u8{
"public ", "private ", "protected ", "internal ",
"static ", "abstract ", "virtual ", "override ",
"sealed ", "async ", "partial ", "readonly ",
"new ", "extern ", "unsafe ", "volatile ",
};
var result = line;
var changed = true;
while (changed) {
changed = false;
for (modifiers) |mod| {
if (std.mem.startsWith(u8, result, mod)) {
result = result[mod.len..];
changed = true;
}
}
}
return result;
}

fn lastIdent(s: []const u8) ?[]const u8 {
if (s.len == 0) return null;
var end = s.len;
if (s[end - 1] == '>') {
var depth: u32 = 0;
var i = end;
while (i > 0) : (i -= 1) {
if (s[i - 1] == '>') depth += 1;
if (s[i - 1] == '<') {
depth -= 1;
if (depth == 0) {
end = i - 1;
break;
}
}
}
}
while (end > 0 and s[end - 1] == ']') {
if (end >= 2 and s[end - 2] == '[') {
end -= 2;
} else break;
}
var ident_end = end;
while (ident_end > 0 and (std.ascii.isAlphanumeric(s[ident_end - 1]) or s[ident_end - 1] == '_')) {
ident_end -= 1;
}
if (ident_end == end) return null;
return s[ident_end..end];
}
fn rebuildDepsFor(self: *Explorer, path: []const u8, outline: *FileOutline) !void {
var deps: std.ArrayList([]const u8) = .{};
errdefer deps.deinit(self.allocator);
Expand Down Expand Up @@ -1834,8 +2054,8 @@ pub fn isCommentOrBlank(line: []const u8, language: Language) bool {
const trimmed = std.mem.trim(u8, line, " \t");
if (trimmed.len == 0) return true;
return switch (language) {
.zig, .rust, .go_lang => std.mem.startsWith(u8, trimmed, "//"),
.python, .ruby => std.mem.startsWith(u8, trimmed, "#"),
.zig, .rust, .go_lang, .csharp => std.mem.startsWith(u8, trimmed, "//"),
.python, .ruby => std.mem.startsWith(u8, trimmed, "#"),
.javascript, .typescript, .c, .cpp => std.mem.startsWith(u8, trimmed, "//") or std.mem.startsWith(u8, trimmed, "/*") or std.mem.startsWith(u8, trimmed, "*"),
else => false,
};
Expand Down
1 change: 1 addition & 0 deletions src/style.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@ pub const Style = struct {
if (std.mem.eql(u8, lang, "rust")) return self.orange;
if (std.mem.eql(u8, lang, "python")) return self.blue;
if (std.mem.eql(u8, lang, "c") or std.mem.eql(u8, lang, "cpp")) return self.blue;
if (std.mem.eql(u8, lang, "csharp")) return self.magenta;
if (std.mem.eql(u8, lang, "markdown")) return self.dim;
if (std.mem.eql(u8, lang, "json") or std.mem.eql(u8, lang, "yaml")) return self.dim;
return self.dim; // unknown
Expand Down
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