[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
* I2 Q9 F! J4 \1 x) z" n1.3 Related Information................................................................................1
1.4 Terms...................................................................................................1
2 VFR Description in BNF......................................................................................3
2.1 VFR Programming Keywords....................................................................3
2.1.1 // (comment marker).................................................................3
2.1.2 #define...................................................................................4
2.1.3 #include..................................................................................4
2.2 VFR Program.........................................................................................4
2.3 VFR Data Struct Definition.......................................................................5
2 f& R* T8 F3 S+ |% T2.4 VFR FormSet Definition...........................................................................6
2.5 VFR FormSet List Definition.....................................................................7
2.6 VFR Default Stores Definition...................................................................7
) l% L; r) d9 g( ]; U% b# Z( _2.7 VFR Variable Store Definition...................................................................8
1 Q* _$ u  C0 H" B3 b2.7.1 VFR Buffer Store Definition.........................................................8
2.7.2 VFR EFI Variable Store Definition.................................................8
4 v  p9 M& p0 C) W7 ]2.7.3 VFR Variable Name Store Definition.............................................8
/ X& D8 b* r, ^5 L( g. Y! z2.8 VFR FormSet DisableIf Definition..............................................................9
0 v, [5 }* a) K6 K. I5 _0 A2.9 VFR FormSet SuppressIf Definition............................................................9
9 a* n) x- o" i* a8 @/ E$ \( H+ V2.10 VFR General Token Definition.................................................................10
! E6 I6 ~9 [$ h: w& a% A0 c2.10.1 GUID Definition.......................................................................10
; w' u. S1 |4 q! e$ f0 k2.10.2 String & String Identifier Definition............................................10
2.10.3 Number Definition...................................................................10
2.10.4 VFR Statement Header Definition...............................................10
* P4 D3 v' G/ Q1 V2.10.5 VFR Question Header Definition.................................................11
1 Q5 ~& k. T8 \9 ~5 Z2.10.6 VFR Constant Value Definition...................................................11
0 y+ C% c' s" M) q5 W2.10.7 VFR Statement Image & Locked Tag Definition............................12
( {0 a! L* B' ~. a+ K  U2.11 VFR Form Definition..............................................................................12
2.11.1 VFR Form Map Definition..........................................................13
2.11.2 VFR Image Statement Definition................................................13
. k! z) S& V- s0 P4 a2.11.3 VFR Locked Statement Definition...............................................13
8 r, m, U6 ^$ M* {4 w2.11.4 VFR Rule Statement Definition..................................................13
2.11.5 VFR Statement Definition.........................................................14
" U+ w# F: y$ Y6 T2.11.6 VFR Question Type Statements Definition...................................17
. R( _" w2 J3 x) y4 @2.11.7 VFR Conditional Type Statements Definition................................32
2.11.8 VFR GUID Statement Definition.................................................33
2.12 VFR Expression Statement Definition.......................................................34
6 G( Q0 f. _; n8 j2.12.1 OR........................................................................................34
3 s2 n* a8 W! b) S2 [2.12.2 AND......................................................................................34
2.12.3 bitwiseor................................................................................34
2.12.4 bitwiseand.............................................................................34
2.12.5 equal.....................................................................................35
2.12.6 compare................................................................................35
: W2 [+ e+ M, u2.12.7 shift......................................................................................35
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2.12.8 add/minus..............................................................................35
9 @/ ?- d5 y% N- G% j" \2.12.9 multiply/divide/modulo............................................................36
- T& c" C; N; {0 Q9 g2.12.10 cast terms..............................................................................36
- {( d9 N3 h% B/ K7 b  @* l2.12.11 atom terms............................................................................36