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
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
#
#
# The Nimrod Compiler
# (c) Copyright 2009 Andreas Rumpf
#
# See the file "copying.txt", included in this
# distribution, for details about the copyright.
#
# This module implements Nimrod's standard template filter.
import
llstream, os, wordrecg, idents, strutils, ast, astalgo, msgs, options,
rnimsyn, filters
proc filterTmpl*(stdin: PLLStream, filename: string, call: PNode): PLLStream
# #! template(subsChar='$', metaChar='#') | standard(version="0.7.2")
# implementation
type
TParseState = enum
psDirective, psTempl
TTmplParser{.final.} = object
inp*: PLLStream
state*: TParseState
info*: TLineInfo
indent*, par*: int
x*: string # the current input line
outp*: PLLStream # the ouput will be parsed by pnimsyn
subsChar*, NimDirective*: Char
emit*, conc*, toStr*: string
const
PatternChars = {'a'..'z', 'A'..'Z', '0'..'9', '\x80'..'\xFF', '.', '_'}
proc newLine(p: var TTmplParser) =
LLStreamWrite(p.outp, repeatChar(p.par, ')'))
p.par = 0
if p.info.line > int16(1): LLStreamWrite(p.outp, "\n")
proc parseLine(p: var TTmplParser) =
var
d, j, curly: int
keyw: string
j = 0
while p.x[j] == ' ': inc(j)
if (p.x[0] == p.NimDirective) and (p.x[0 + 1] == '!'):
newLine(p)
elif (p.x[j] == p.NimDirective):
newLine(p)
inc(j)
while p.x[j] == ' ': inc(j)
d = j
keyw = ""
while p.x[j] in PatternChars:
add(keyw, p.x[j])
inc(j)
case whichKeyword(keyw)
of wEnd:
if p.indent >= 2:
dec(p.indent, 2)
else:
p.info.col = int16(j)
liMessage(p.info, errXNotAllowedHere, "end")
LLStreamWrite(p.outp, repeatChar(p.indent))
LLStreamWrite(p.outp, "#end")
of wIf, wWhen, wTry, wWhile, wFor, wBlock, wCase, wProc, wIterator,
wConverter, wMacro, wTemplate, wMethod:
LLStreamWrite(p.outp, repeatChar(p.indent))
LLStreamWrite(p.outp, copy(p.x, d))
inc(p.indent, 2)
of wElif, wOf, wElse, wExcept, wFinally:
LLStreamWrite(p.outp, repeatChar(p.indent - 2))
LLStreamWrite(p.outp, copy(p.x, d))
else:
LLStreamWrite(p.outp, repeatChar(p.indent))
LLStreamWrite(p.outp, copy(p.x, d))
p.state = psDirective
else:
# data line
j = 0
case p.state
of psTempl:
# next line of string literal:
LLStreamWrite(p.outp, p.conc)
LLStreamWrite(p.outp, "\n")
LLStreamWrite(p.outp, repeatChar(p.indent + 2))
LLStreamWrite(p.outp, "\"")
of psDirective:
newLine(p)
LLStreamWrite(p.outp, repeatChar(p.indent))
LLStreamWrite(p.outp, p.emit)
LLStreamWrite(p.outp, "(\"")
inc(p.par)
p.state = psTempl
while true:
case p.x[j]
of '\0':
break
of '\x01'..'\x1F', '\x80'..'\xFF':
LLStreamWrite(p.outp, "\\x")
LLStreamWrite(p.outp, toHex(ord(p.x[j]), 2))
inc(j)
of '\\':
LLStreamWrite(p.outp, "\\\\")
inc(j)
of '\'':
LLStreamWrite(p.outp, "\\\'")
inc(j)
of '\"':
LLStreamWrite(p.outp, "\\\"")
inc(j)
else:
if p.x[j] == p.subsChar:
# parse Nimrod expression:
inc(j)
case p.x[j]
of '{':
p.info.col = int16(j)
LLStreamWrite(p.outp, '\"')
LLStreamWrite(p.outp, p.conc)
LLStreamWrite(p.outp, p.toStr)
LLStreamWrite(p.outp, '(')
inc(j)
curly = 0
while true:
case p.x[j]
of '\0':
liMessage(p.info, errXExpected, "}")
of '{':
inc(j)
inc(curly)
LLStreamWrite(p.outp, '{')
of '}':
inc(j)
if curly == 0: break
if curly > 0: dec(curly)
LLStreamWrite(p.outp, '}')
else:
LLStreamWrite(p.outp, p.x[j])
inc(j)
LLStreamWrite(p.outp, ')')
LLStreamWrite(p.outp, p.conc)
LLStreamWrite(p.outp, '\"')
of 'a'..'z', 'A'..'Z', '\x80'..'\xFF':
LLStreamWrite(p.outp, '\"')
LLStreamWrite(p.outp, p.conc)
LLStreamWrite(p.outp, p.toStr)
LLStreamWrite(p.outp, '(')
while p.x[j] in PatternChars:
LLStreamWrite(p.outp, p.x[j])
inc(j)
LLStreamWrite(p.outp, ')')
LLStreamWrite(p.outp, p.conc)
LLStreamWrite(p.outp, '\"')
else:
if p.x[j] == p.subsChar:
LLStreamWrite(p.outp, p.subsChar)
inc(j)
else:
p.info.col = int16(j)
liMessage(p.info, errInvalidExpression, "$")
else:
LLStreamWrite(p.outp, p.x[j])
inc(j)
LLStreamWrite(p.outp, "\\n\"")
proc filterTmpl(stdin: PLLStream, filename: string, call: PNode): PLLStream =
var p: TTmplParser
p.info = newLineInfo(filename, 0, 0)
p.outp = LLStreamOpen("")
p.inp = stdin
p.subsChar = charArg(call, "subschar", 1, '$')
p.nimDirective = charArg(call, "metachar", 2, '#')
p.emit = strArg(call, "emit", 3, "result.add")
p.conc = strArg(call, "conc", 4, " & ")
p.toStr = strArg(call, "tostring", 5, "$")
while not LLStreamAtEnd(p.inp):
p.x = LLStreamReadLine(p.inp)
p.info.line = p.info.line + int16(1)
parseLine(p)
newLine(p)
result = p.outp
LLStreamClose(p.inp)
|