[210_12] feat(srfi-19): 初始化 time 和 date 结构，实现部分函数

[jetjinser]

[210_12] (srfi srfi-19)

任务相关的代码文件

• src/goldfish.hpp
• tests/goldfish/liii/time-test.scm
• goldfish/scheme/time.scm
• goldfish/srfi/srfi-19.scm

如何测试

# 可能需要清除缓存
# rm .xmake/ build/ -r
xmake f -vyD
xmake b goldfish
./bin/goldfish tests/goldfish/liii/time-test.scm

2026/1/30 初始化 time 和 date 结构

What

1. 新增 glue：g_gettimeofday, g_monotonic-nanosecond, g_steady-clock-resolution, g_system-clock-resolution
2. 实现 time 与 date 基本结构
3. 实现部分 SRFI-19 proc，包括 current-time, date->string 等

Why

扩充时间与日期的支持。

How

通过 C++17 的 chrono 绑定实现。

[Copilot]

Pull request overview

This PR implements SRFI-19 time and date support for Goldfish Scheme by adding C++17 chrono-based glue functions and comprehensive Scheme implementations of time and date structures with formatting capabilities.

Changes:

• Added C++ glue functions for time operations using std::chrono (get-time-of-day, monotonic-nanosecond, clock resolutions)
• Implemented SRFI-19 time and date record types with accessors and basic operations
• Implemented date-to-string formatting with extensive format specifier support
• Added comprehensive test suite covering time/date creation, accessors, and formatting

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 13 comments.

Show a summary per file

File	Description
src/goldfish.hpp	Adds C++ glue functions using std::chrono for time operations and clock resolution queries
goldfish/scheme/time.scm	Refactors current-second and current-jiffy to use new glue functions, exports clock resolution constants
goldfish/srfi/srfi-19.scm	Implements SRFI-19 time/date types, current-time, time-resolution, date->string with format specifiers, and leap second handling
tests/goldfish/liii/time-test.scm	Comprehensive test suite for time/date constants, constructors, accessors, formatting, and error conditions
devel/210_12.md	Development documentation describing the implementation approach and testing instructions

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