wa-lang / ugo

µGo编程语言(从头开发一个迷你Go语言编译器)

µGo 编程语言

µGo 是 Go 语言的真子集(不含标准库部分), 可以直接作为Go代码编译执行.

• 安装 ugo: go get github.com/wa-lang/ugo.
• 实现原理: https://github.com/wa-lang/ugo-compiler-book

例子

例子 (_example/hello.ugo):

package main

func main() {
	for n := 2; n <= 30; n = n + 1 {
		var isPrime int = 1
		for i := 2; i*i <= n; i = i + 1 {
			if x := n % i; x == 0 {
				isPrime = 0
			}
		}
		if isPrime != 0 {
			println(n)
		}
	}
}

运行:

$ ugo run _examples/hello.ugo 
2
3
5
7
11
13
17
19
23
29

版权

个人学习目的可自由使用.

ugo's Issues

Huge Logical Error

In compiler.go

			// if.body
			func() {
				defer p.restoreScope(p.scope)
				p.enterScope()

				fmt.Fprintf(w, "\n%s:\n", ifBody)
				if stmt.Else != nil {
					p.compileStmt(w, stmt.Body)
					fmt.Fprintf(w, "\tbr label %%%s\n", ifElse) // here
				} else {
					p.compileStmt(w, stmt.Body)
					fmt.Fprintf(w, "\tbr label %%%s\n", ifEnd)
				}
			}()

the ifElse should be ifEnd !

By the way, I am also curious about why labels ifInit and ifCond are needed, since they are branched to immediately.