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斯坦福 编译原理 - COOL语法要点

学斯坦福的编译原理，大作业是给COOL语言写编译器，所以先总结一下COOL的语法要点。

运行#

  • 使用官方的编译器编译运行：
coolc [ -o fileout ] file1.cl file2.cl ... filen.clspim [-file] file.s

语法#

参见COOL MANUAL官方文档。

Lexical Structure#

integers#

[0-9]*

type identifiers#

[A-Z]letter*

object identifiers#

[a-z]letter*

special notation#

self, SELF_TYPE

strings#

\"(letter | \b | \t | \n | \f)*\"

  • A string may not contain EOF.
  • A string may not contain the null (character\0).

comments#

-- a single-line comment*     multi-line     comment*

keywords#

class, else, false, fi, if, in, inherits, isvoid, let, loop, pool, then, while, case, esac, new, of, not, true

  • Except for the constants true and false, keywords are case insensitive.
  • To conform to the rules for other objects, the first letter of true and false must be lowercase; the trailing letters may be upper or lower case.

white space#

  • blank (ascii 32),
  • \n (newline, ascii 10),
  • \f (form feed, ascii 12),
  • \r (carriage return, ascii 13),
  • \t (tab, ascii 9),
  • \v (vertical tab, ascii 11).