blob: 9f4b25b960efbb63c7412d32d95f2428c14eef39 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
(define-module (c unlex)
:use-module (hnh util type)
:use-module (ice-9 match)
:use-module (c lex2)
:use-module (c cpp-types)
:use-module (c cpp-util)
:export (unlex
stringify-token
stringify-tokens))
;; takes a list of preprocessing-token's, and return a "source" string
(define (unlex tokens)
(typecheck tokens (list-of lexeme?))
(string-concatenate
(map (lambda (x)
(cond ((preprocessing-token? x) (stringify-token x))
((whitespace-token? x) " ")))
(squeeze-whitespace tokens))))
;; Returns the "source" of the token, as a preprocessing string literal token
(define (stringify-token preprocessing-token)
(match (lexeme-body preprocessing-token)
(`(string-literal ,s)
(format #f "~s" s))
(`(header-name (q-string ,s))
(format #f "~s" s))
(`(header-name (h-string ,s))
(format #f "<~a>" s))
(`(identifier ,id) id)
(`(pp-number ,n) n)
(`(character-constant ,c)
(format #f "'~a'" c))
(`(punctuator ,p) p)))
;; takes a token list, and return a single string literal token
(define (stringify-tokens tokens)
(lexeme type: 'preprocessing-token body: `(string-literal ,(unlex tokens))))
|