104 lines
2.3 KiB
Zig
104 lines
2.3 KiB
Zig
const std = @import("std");
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const tokens = @import("tokens.zig");
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const Token = tokens.Token;
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pub const NodeList = std.ArrayList(*Node);
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pub const ParamList = std.ArrayList(ParamDecl);
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pub const ConstList = std.ArrayList(SingleConst);
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// TODO convert FnCall to something like PrefixOp / InfixOp / SuffixOp
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pub const NodeType = enum {
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Root,
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FnDecl,
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FnCall,
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ConstDecl,
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String,
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};
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pub const ParamDecl = struct {
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name: Token,
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// TODO types
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typ: Token,
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};
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pub const FnDecl = struct {
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func_name: Token,
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params: ParamList,
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body: NodeList,
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};
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pub const FnCall = struct {
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func_name: Token,
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arguments: NodeList,
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};
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pub const SingleConst = struct {
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name: Token,
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// TODO expr
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value: Token,
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};
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pub const Node = union(NodeType) {
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Root: NodeList,
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FnDecl: FnDecl,
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ConstDecl: ConstList,
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FnCall: FnCall,
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String: Token,
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};
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pub fn mkRoot(allocator: *std.mem.Allocator) !*Node {
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var node = try allocator.create(Node);
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node.* = Node{ .Root = NodeList.init(allocator) };
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return node;
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}
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fn print(ident: usize, comptime fmt: []const u8, args: ...) void {
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var i: usize = 0;
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while (i < ident) : (i += 1) {
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std.debug.warn("\t");
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}
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std.debug.warn(fmt, args);
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}
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pub fn printNode(node: *Node, ident: usize) void {
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switch (node.*) {
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.FnDecl => |decl| {
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print(ident, "FnDecl name='{}'\n", decl.func_name.lexeme);
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for (decl.params.toSlice()) |param| {
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print(
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ident + 1,
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"param: '{}' {}\n",
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param.name.lexeme,
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param.typ.lexeme,
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);
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}
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},
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.ConstDecl => |consts| {
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print(ident, "ConstDecl ({} consts)\n", consts.len);
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for (consts.toSlice()) |const_decl| {
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print(
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ident + 1,
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"'{}' = '{}'\n",
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const_decl.name.lexeme,
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const_decl.value.lexeme,
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);
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}
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},
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.Root => {
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for (node.Root.toSlice()) |child| {
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printNode(child, ident + 1);
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}
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},
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else => {
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print(ident, "unknown node: {}\n", node);
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},
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}
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}
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