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

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Contents
1 Introduction.....................................................................................................1
1.1 Overview..............................................................................................1
' `. q& h; d1 [3 h1 ~1.2 Target Audience.....................................................................................1
1.3 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
5 ]) r1 I0 f! y% t' i, G, n6 v6 e2.1.2 #define...................................................................................4
/ |. F! r9 r' x0 T* ^: J2.1.3 #include..................................................................................4
2.2 VFR Program.........................................................................................4
* M( q- h/ C$ M2.3 VFR Data Struct Definition.......................................................................5
! P- s+ z9 k& ?5 `/ ]2.4 VFR FormSet Definition...........................................................................6
+ m( ~( [0 P) Z1 \# a2.5 VFR FormSet List Definition.....................................................................7
6 R0 o0 x) s' T3 p2.6 VFR Default Stores Definition...................................................................7
2.7 VFR Variable Store Definition...................................................................8
0 |+ M/ S6 i+ W- g! j. z+ N3 [2.7.1 VFR Buffer Store Definition.........................................................8
0 w6 D  d& C  V/ q" q2.7.2 VFR EFI Variable Store Definition.................................................8
0 V8 w5 }" @: ~" d7 t2.7.3 VFR Variable Name Store Definition.............................................8
2.8 VFR FormSet DisableIf Definition..............................................................9
' ~. _' Z9 L, b2.9 VFR FormSet SuppressIf Definition............................................................9
2.10 VFR General Token Definition.................................................................10
2.10.1 GUID Definition.......................................................................10
2.10.2 String & String Identifier Definition............................................10
2.10.3 Number Definition...................................................................10
2.10.4 VFR Statement Header Definition...............................................10
2.10.5 VFR Question Header Definition.................................................11
8 g: C7 B# B' S  `8 ~+ V/ T1 I2.10.6 VFR Constant Value Definition...................................................11
! K4 y; P% \! i7 [+ }7 C2.10.7 VFR Statement Image & Locked Tag Definition............................12
2.11 VFR Form Definition..............................................................................12
5 M: V- `+ W5 F2.11.1 VFR Form Map Definition..........................................................13
6 Y; l$ j4 j8 p) l2.11.2 VFR Image Statement Definition................................................13
9 l1 y, S' ?1 O, Y2.11.3 VFR Locked Statement Definition...............................................13
2.11.4 VFR Rule Statement Definition..................................................13
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
& n) N3 }3 n$ o! K2 V! m) ~2.12 VFR Expression Statement Definition.......................................................34
9 U7 h6 J0 [3 \5 |2.12.1 OR........................................................................................34
2.12.2 AND......................................................................................34
3 b6 \) O1 Z& ~9 {/ u2.12.3 bitwiseor................................................................................34
7 r3 P/ _+ u- g2.12.4 bitwiseand.............................................................................34
) N! c' D. ~% L: A: e3 R6 B2.12.5 equal.....................................................................................35
5 @4 |- ]. g' j% r2.12.6 compare................................................................................35
8 E( B! w0 Q; Y4 L( v5 S" D2.12.7 shift......................................................................................35
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2.12.8 add/minus..............................................................................35
2.12.9 multiply/divide/modulo............................................................36
2.12.10 cast terms..............................................................................36
2.12.11 atom terms............................................................................36