33 lines
1.1 KiB
Zig
33 lines
1.1 KiB
Zig
const std = @import("std");
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const ast = @import("ast.zig");
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fn parenthesize(name: []const u8, exprs: []*ast.Expr) void {
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std.debug.warn("({}", name);
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for (exprs) |expr| {
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std.debug.warn(" ");
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printAst(expr);
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}
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std.debug.warn(")");
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}
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pub fn printAst(ast_expr: *ast.Expr) void {
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switch (ast_expr.*) {
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.Binary => |expr| parenthesize(expr.operator.lexeme, &[]*ast.Expr{ expr.left, expr.right }),
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.Grouping => |expr| parenthesize("group", &[]*ast.Expr{expr.expression}),
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.Unary => |expr| parenthesize(expr.operator.lexeme, &[]*ast.Expr{expr.right}),
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.Number => |ast_num| {
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switch (ast_num) {
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.Integer32 => |num| std.debug.warn("{}", num),
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.Integer64 => |num| std.debug.warn("{}", num),
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.Unsigned32 => |num| std.debug.warn("{}", num),
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.Unsigned64 => |num| std.debug.warn("{}", num),
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.Float32 => |num| std.debug.warn("{}", num),
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.Float64 => |num| std.debug.warn("{}", num),
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}
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},
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else => unreachable,
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}
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}
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