ruby/demo/demo_std.rb · 5252 字节 · 下载原文

# demo_std.rb —— **第 1 层：标准输入输出**（Ruby 的 print / puts）

# demo_std.rb — **Layer 1: standard I/O** (Ruby's print / puts)

#

# 这一层就是语言自己的标准输出：往 stdout 写文本。

# This layer is the language's own standard output: writing text to stdout.

# 也是最基础的一层，也是**唯一有逐字节确定性判据**的一层 —— 下面的输出

# It is also the most basic layer, and the **only one with a byte-for-byte deterministic check** — the output below

# 跑两遍完全一样（不读输入、不用随机数、不看时间）。

# is exactly the same on two runs (it reads no input, uses no random numbers, and does not look at the clock).

#

# ## 判据

# ## The check

#

#     vmlcli Examples/ruby/demo_std.rb

#

# 期望 stdout 逐字节等于本文件末尾「期望输出」那段。

# Expect stdout to be byte-for-byte equal to the "expected output" block at the end of this file.

#

# ## ⚠ 本前端实测的四条限制（写 demo 时避开）

# ## ⚠ Four limits of this frontend measured in practice (avoid them when writing demos)

#

#   · **字符串插值 `#{...}` 不生效** —— 原样打出 `#{a}`（实测）。

#   · **String interpolation `#{...}` does not work** — it prints `#{a}` verbatim (measured).

#     要「文字 + 数字」只能用 `print("a=")` + `print(a)` 这样拆开写，

#     To print "text + number" you can only split it up as `print("a=")` + `print(a)`,

#     好在 `print` 打印数字是对的、且不补换行。

#     fortunately `print` prints numbers correctly and does not append a newline.

#   · `puts("a", "b")` 把多个实参**直接连起来**（`multiargs`），不插分隔符。

#   · `puts("a", "b")` **concatenates** the multiple arguments directly (`multiargs`), inserting no separator.

#   · ~~**没有 `.to_s`**~~ —— **已修**（`rb_to_s` / `rb_ftoa` 分派打通）：`(a + b).to_s` 现在得到 `"42"`。

#   · ~~**There is no `.to_s`**~~ — **fixed**: `(a + b).to_s` now yields `"42"`.

#   · `\x1b` 在**字符串字面量里是支持的**（Ruby 走的是 `LexerBase.ReadEscape`），

#   · `\x1b` **is supported inside string literals** (Ruby goes through `LexerBase.ReadEscape`),

#     所以彩色控制台那一层可以内联 ESC —— 见 demo_tty.rb。

#     so the color-console layer can inline ESC — see demo_tty.rb.

#

# 本份用 `print` 单值输出 + `puts` 整行，避开上面全部四条。

# This file uses `print` for single values + `puts` for whole lines, avoiding all four limits above.


# UI 库的显式引用（用户 2026-10-01 定的口径，见 docs/UI库导入约定.md）。

# Explicit reference to the UI library (rule set by the user on 2026-10-01; see the UI-library import convention doc under docs).

# 声明文件 Lib/ruby/vml_ui.rb 由 GenLib 生成、不要手改：

#     dotnet run --project tools/GenLib -- -u -c vmlui -l ruby -o Lib/ruby/vml_ui.rb

# ⚠ 实测：本条是**文档级**引用 —— 删掉它示例照样编得过、跑得对（Ruby 按名字解析）。

# ⚠ Measured: this line is a **documentation-level** reference — delete it and the example still compiles and runs (Ruby resolves by name).

require 'vml_ui'

lang = ui_scr_get_language()

puts("=== demo_std (Ruby) ===")
if lang == 0 then puts("纯字符串一行") else puts("A single line of plain string") end
if lang == 0 then puts("转义：制表\t反斜杠\\引号\"") else puts("Escape: tab\tbackslash\\quote\"") end

a = 17
b = 25

print("a=")
print(a)
print(" b=")
print(b)
print("\n")

print("a+b=")
print(a + b)
print(" a-b=")
print(a - b)
print(" a*b=")
print(a * b)
print("\n")

print("a/b=")
print(a / b)
print(" a%b=")
print(a % b)
print("\n")

if lang == 0 then print("负数： ") else print("negatives: ") end
print(0 - a)
print(" ")
print(0 - (a * b))
print("\n")

# 循环算一个结果，证明这一层和语言本身是通的

# A loop computes one result, proving this layer and the language itself are wired up

i = 1
total = 0
while i <= 10
  total = total + i * i
  i = i + 1
end
print("1^2+...+10^2 = ")
print(total)
print("\n")

# 九九表的一小段（多行）

# A short stretch of the multiplication table (several lines)

i = 1
while i <= 5
  print(i)
  print(" x 7 = ")
  print(i * 7)
  print("\n")
  i = i + 1
end

if lang == 0 then puts("=== 完成 ===") else puts("=== Done ===") end

# ── 期望输出（逐字节）────────────────────────────────────────────

# === demo_std (Ruby) ===

# 纯字符串一行

# A single line of plain string

# 转义：制表	反斜杠\引号"

# Escape: tab	backslash\quote"

# a=17 b=25

# a+b=42 a-b=-8 a*b=425

# a/b=0 a%b=17

# 负数： -17 -425

# Negative numbers: -17 -425

# 1^2+...+10^2 = 385

# 1 x 7 = 7

# 2 x 7 = 14

# 3 x 7 = 21

# 4 x 7 = 28

# 5 x 7 = 35

# === 完成 ===

# === Done ===

# ────────────────────────────────────────────────────────────────