[转载]VFR Programming Language v1.3 PDF 2010-2-12

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Contents
1 Introduction.....................................................................................................1
1.1 Overview..............................................................................................1
1.2 Target Audience.....................................................................................1
$ ]) V& q+ `; W4 z4 y: H1.3 Related Information................................................................................1
% @  j& b- q# m" s1 c8 i$ H7 y1.4 Terms...................................................................................................1
' c" E4 f/ }: ^  x2 VFR Description in BNF......................................................................................3
2.1 VFR Programming Keywords....................................................................3
, h5 P; S% C1 u/ g; h- O2.1.1 // (comment marker).................................................................3
6 ?: j3 _3 g# B# M5 ]& M# N2.1.2 #define...................................................................................4
2.1.3 #include..................................................................................4
: m8 T( b0 P. @, ^2.2 VFR Program.........................................................................................4
2.3 VFR Data Struct Definition.......................................................................5
4 H& W  l/ M% c2.4 VFR FormSet Definition...........................................................................6
% x; a% [( k# x. ^7 x2.5 VFR FormSet List Definition.....................................................................7
2.6 VFR Default Stores Definition...................................................................7
" C  J9 Z3 o* r- E& {2 g" i2.7 VFR Variable Store Definition...................................................................8
9 y# R+ a5 a0 e6 @* q: x2.7.1 VFR Buffer Store Definition.........................................................8
2.7.2 VFR EFI Variable Store Definition.................................................8
2.7.3 VFR Variable Name Store Definition.............................................8
2.8 VFR FormSet DisableIf Definition..............................................................9
% ^/ i& L' E0 M2.9 VFR FormSet SuppressIf Definition............................................................9
" ~2 H8 o" {) o$ Y/ n' s2.10 VFR General Token Definition.................................................................10
2.10.1 GUID Definition.......................................................................10
/ X; h) X- v8 {( u2.10.2 String & String Identifier Definition............................................10
2 [* _) X& J6 D4 ?- y; A& m2.10.3 Number Definition...................................................................10
2.10.4 VFR Statement Header Definition...............................................10
2.10.5 VFR Question Header Definition.................................................11
2.10.6 VFR Constant Value Definition...................................................11
2.10.7 VFR Statement Image & Locked Tag Definition............................12
/ }6 {9 ~2 k' V( h: l2.11 VFR Form Definition..............................................................................12
! w3 [* M% @% i- e2.11.1 VFR Form Map Definition..........................................................13
8 t, s0 s5 h3 E0 }0 n2.11.2 VFR Image Statement Definition................................................13
" ^/ a2 U% k! ^$ Q  b6 i9 }! B2.11.3 VFR Locked Statement Definition...............................................13
! r' n+ q8 }9 l6 r0 p2.11.4 VFR Rule Statement Definition..................................................13
0 Z; ~/ f  Q2 |2.11.5 VFR Statement Definition.........................................................14
2.11.6 VFR Question Type Statements Definition...................................17
2.11.7 VFR Conditional Type Statements Definition................................32
2.11.8 VFR GUID Statement Definition.................................................33
( T" `+ Z# {  Z) ?2.12 VFR Expression Statement Definition.......................................................34
2.12.1 OR........................................................................................34
% s9 r+ j: ]* I, w1 G4 A% Y6 a2.12.2 AND......................................................................................34
8 ]- f/ h8 ^; r9 f5 c2.12.3 bitwiseor................................................................................34
2.12.4 bitwiseand.............................................................................34
2.12.5 equal.....................................................................................35
2.12.6 compare................................................................................35
2.12.7 shift......................................................................................35
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2 v6 l+ e, a, C8 G( c# k$ o1 T2.12.8 add/minus..............................................................................35
2.12.9 multiply/divide/modulo............................................................36
4 D) _2 ^" F* T/ ~3 [0 O( N2.12.10 cast terms..............................................................................36
" h+ X) Y$ \- b, ]" x$ T+ q2.12.11 atom terms............................................................................36