Use arbitrary lookahead to determine if the next expression is a lambda expression.

1 files changed, 130 insertions, 130 deletions

diff --git a/Source/Dafny/Scanner.cs b/Source/Dafny/Scanner.cs
index 7afd3ab7..f54acb78 100644
--- a/Source/Dafny/Scanner.cs
+++ b/Source/Dafny/Scanner.cs
@@ -253,28 +253,28 @@ public class Scanner {
 		for (int i = 65; i <= 90; ++i) start[i] = 1;

 		for (int i = 95; i <= 95; ++i) start[i] = 1;

 		for (int i = 98; i <= 122; ++i) start[i] = 1;

-		for (int i = 49; i <= 57; ++i) start[i] = 45;

-		start[97] = 46; 

-		start[39] = 47; 

-		start[48] = 48; 

+		for (int i = 49; i <= 57; ++i) start[i] = 46;

+		start[97] = 47; 

+		start[39] = 48; 

+		start[48] = 49; 

 		start[34] = 21; 

 		start[64] = 26; 

 		start[58] = 89; 

+		start[44] = 29; 

 		start[124] = 90; 

-		start[8226] = 30; 

-		start[59] = 31; 

+		start[8226] = 31; 

+		start[59] = 32; 

 		start[61] = 91; 

 		start[45] = 92; 

-		start[123] = 34; 

-		start[125] = 35; 

-		start[91] = 36; 

-		start[93] = 37; 

-		start[40] = 38; 

-		start[41] = 39; 

-		start[42] = 40; 

+		start[123] = 35; 

+		start[125] = 36; 

+		start[91] = 37; 

+		start[93] = 38; 

+		start[40] = 39; 

+		start[41] = 40; 

+		start[42] = 41; 

 		start[33] = 93; 

 		start[46] = 94; 

-		start[44] = 63; 

 		start[60] = 95; 

 		start[62] = 96; 

 		start[96] = 64; 

@@ -495,53 +495,53 @@ public class Scanner {
 

 	void CheckLiteral() {

 		switch (t.val) {

-			case "assume": t.kind = 15; break;

-			case "calc": t.kind = 16; break;

-			case "case": t.kind = 17; break;

-			case "decreases": t.kind = 18; break;

-			case "invariant": t.kind = 19; break;

-			case "modifies": t.kind = 20; break;

-			case "reads": t.kind = 21; break;

-			case "requires": t.kind = 22; break;

-			case "include": t.kind = 32; break;

-			case "abstract": t.kind = 33; break;

-			case "module": t.kind = 34; break;

-			case "refines": t.kind = 35; break;

-			case "import": t.kind = 36; break;

-			case "opened": t.kind = 37; break;

-			case "as": t.kind = 39; break;

-			case "default": t.kind = 40; break;

-			case "class": t.kind = 41; break;

-			case "extends": t.kind = 42; break;

-			case "trait": t.kind = 43; break;

-			case "ghost": t.kind = 44; break;

-			case "static": t.kind = 45; break;

-			case "datatype": t.kind = 46; break;

-			case "codatatype": t.kind = 47; break;

-			case "var": t.kind = 48; break;

-			case "newtype": t.kind = 50; break;

-			case "type": t.kind = 51; break;

-			case "iterator": t.kind = 53; break;

-			case "yields": t.kind = 54; break;

-			case "returns": t.kind = 55; break;

-			case "method": t.kind = 58; break;

-			case "lemma": t.kind = 59; break;

-			case "colemma": t.kind = 60; break;

-			case "comethod": t.kind = 61; break;

-			case "constructor": t.kind = 62; break;

-			case "free": t.kind = 63; break;

-			case "ensures": t.kind = 64; break;

-			case "yield": t.kind = 65; break;

-			case "bool": t.kind = 66; break;

-			case "char": t.kind = 67; break;

-			case "nat": t.kind = 68; break;

-			case "int": t.kind = 69; break;

-			case "real": t.kind = 70; break;

-			case "set": t.kind = 71; break;

-			case "multiset": t.kind = 72; break;

-			case "seq": t.kind = 73; break;

-			case "string": t.kind = 74; break;

-			case "map": t.kind = 75; break;

+			case "assume": t.kind = 16; break;

+			case "calc": t.kind = 17; break;

+			case "case": t.kind = 18; break;

+			case "decreases": t.kind = 19; break;

+			case "invariant": t.kind = 20; break;

+			case "map": t.kind = 21; break;

+			case "modifies": t.kind = 22; break;

+			case "reads": t.kind = 23; break;

+			case "requires": t.kind = 24; break;

+			case "include": t.kind = 34; break;

+			case "abstract": t.kind = 35; break;

+			case "module": t.kind = 36; break;

+			case "refines": t.kind = 37; break;

+			case "import": t.kind = 38; break;

+			case "opened": t.kind = 39; break;

+			case "as": t.kind = 41; break;

+			case "default": t.kind = 42; break;

+			case "class": t.kind = 43; break;

+			case "extends": t.kind = 44; break;

+			case "trait": t.kind = 45; break;

+			case "ghost": t.kind = 46; break;

+			case "static": t.kind = 47; break;

+			case "datatype": t.kind = 48; break;

+			case "codatatype": t.kind = 49; break;

+			case "var": t.kind = 50; break;

+			case "newtype": t.kind = 51; break;

+			case "type": t.kind = 52; break;

+			case "iterator": t.kind = 54; break;

+			case "yields": t.kind = 55; break;

+			case "returns": t.kind = 56; break;

+			case "method": t.kind = 59; break;

+			case "lemma": t.kind = 60; break;

+			case "colemma": t.kind = 61; break;

+			case "comethod": t.kind = 62; break;

+			case "constructor": t.kind = 63; break;

+			case "free": t.kind = 64; break;

+			case "ensures": t.kind = 65; break;

+			case "yield": t.kind = 66; break;

+			case "bool": t.kind = 67; break;

+			case "char": t.kind = 68; break;

+			case "nat": t.kind = 69; break;

+			case "int": t.kind = 70; break;

+			case "real": t.kind = 71; break;

+			case "set": t.kind = 72; break;

+			case "multiset": t.kind = 73; break;

+			case "seq": t.kind = 74; break;

+			case "string": t.kind = 75; break;

 			case "object": t.kind = 76; break;

 			case "function": t.kind = 78; break;

 			case "predicate": t.kind = 79; break;

@@ -675,7 +675,7 @@ public class Scanner {
 			case 21:

 				if (ch <= 9 || ch >= 11 && ch <= 12 || ch >= 14 && ch <= '!' || ch >= '#' && ch <= '[' || ch >= ']' && ch <= 65535) {AddCh(); goto case 21;}

 				else if (ch == '"') {AddCh(); goto case 28;}

-				else if (ch == 92) {AddCh(); goto case 51;}

+				else if (ch == 92) {AddCh(); goto case 52;}

 				else {goto case 0;}

 			case 22:

 				if (ch >= '0' && ch <= '9' || ch >= 'A' && ch <= 'F' || ch >= 'a' && ch <= 'f') {AddCh(); goto case 23;}

@@ -694,12 +694,12 @@ public class Scanner {
 				else {goto case 0;}

 			case 27:

 				if (ch <= '!' || ch >= '#' && ch <= 65535) {AddCh(); goto case 27;}

-				else if (ch == '"') {AddCh(); goto case 52;}

+				else if (ch == '"') {AddCh(); goto case 53;}

 				else {goto case 0;}

 			case 28:

 				{t.kind = 7; break;}

 			case 29:

-				{t.kind = 10; break;}

+				{t.kind = 9; break;}

 			case 30:

 				{t.kind = 11; break;}

 			case 31:

@@ -709,121 +709,121 @@ public class Scanner {
 			case 33:

 				{t.kind = 14; break;}

 			case 34:

-				{t.kind = 23; break;}

+				{t.kind = 15; break;}

 			case 35:

-				{t.kind = 24; break;}

-			case 36:

 				{t.kind = 25; break;}

-			case 37:

+			case 36:

 				{t.kind = 26; break;}

-			case 38:

+			case 37:

 				{t.kind = 27; break;}

-			case 39:

+			case 38:

 				{t.kind = 28; break;}

-			case 40:

+			case 39:

 				{t.kind = 29; break;}

+			case 40:

+				{t.kind = 30; break;}

 			case 41:

-				if (ch == 'n') {AddCh(); goto case 42;}

-				else {goto case 0;}

+				{t.kind = 31; break;}

 			case 42:

-				if (ch <= '&' || ch >= '(' && ch <= '/' || ch >= ':' && ch <= '>' || ch == '@' || ch >= '[' && ch <= '^' || ch == '`' || ch >= '{' && ch <= 65535) {apx++; AddCh(); goto case 43;}

+				if (ch == 'n') {AddCh(); goto case 43;}

 				else {goto case 0;}

 			case 43:

+				if (ch <= '&' || ch >= '(' && ch <= '/' || ch >= ':' && ch <= '>' || ch == '@' || ch >= '[' && ch <= '^' || ch == '`' || ch >= '{' && ch <= 65535) {apx++; AddCh(); goto case 44;}

+				else {goto case 0;}

+			case 44:

 				{

 					tlen -= apx;

 					SetScannerBehindT();

-					t.kind = 30; break;}

-			case 44:

-				{t.kind = 31; break;}

+					t.kind = 32; break;}

 			case 45:

+				{t.kind = 33; break;}

+			case 46:

 				recEnd = pos; recKind = 2;

-				if (ch >= '0' && ch <= '9') {AddCh(); goto case 45;}

-				else if (ch == '_') {AddCh(); goto case 53;}

+				if (ch >= '0' && ch <= '9') {AddCh(); goto case 46;}

+				else if (ch == '_') {AddCh(); goto case 54;}

 				else if (ch == '.') {AddCh(); goto case 12;}

 				else {t.kind = 2; break;}

-			case 46:

+			case 47:

 				recEnd = pos; recKind = 1;

 				if (ch == 39 || ch >= '0' && ch <= '9' || ch == '?' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'q' || ch >= 's' && ch <= 'z') {AddCh(); goto case 2;}

-				else if (ch == 'r') {AddCh(); goto case 54;}

+				else if (ch == 'r') {AddCh(); goto case 55;}

 				else {t.kind = 1; t.val = new String(tval, 0, tlen); CheckLiteral(); return t;}

-			case 47:

+			case 48:

 				recEnd = pos; recKind = 1;

-				if (ch >= '0' && ch <= '9' || ch == '?' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 55;}

-				else if (ch == 39) {AddCh(); goto case 56;}

+				if (ch >= '0' && ch <= '9' || ch == '?' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 56;}

+				else if (ch == 39) {AddCh(); goto case 57;}

 				else if (ch <= 9 || ch >= 11 && ch <= 12 || ch >= 14 && ch <= '&' || ch >= '(' && ch <= '/' || ch >= ':' && ch <= '>' || ch == '@' || ch == '[' || ch >= ']' && ch <= '^' || ch == '`' || ch >= '{' && ch <= 65535) {AddCh(); goto case 15;}

-				else if (ch == 92) {AddCh(); goto case 50;}

+				else if (ch == 92) {AddCh(); goto case 51;}

 				else {t.kind = 1; t.val = new String(tval, 0, tlen); CheckLiteral(); return t;}

-			case 48:

+			case 49:

 				recEnd = pos; recKind = 2;

-				if (ch >= '0' && ch <= '9') {AddCh(); goto case 45;}

-				else if (ch == '_') {AddCh(); goto case 53;}

+				if (ch >= '0' && ch <= '9') {AddCh(); goto case 46;}

+				else if (ch == '_') {AddCh(); goto case 54;}

 				else if (ch == 'x') {AddCh(); goto case 9;}

 				else if (ch == '.') {AddCh(); goto case 12;}

 				else {t.kind = 2; break;}

-			case 49:

+			case 50:

 				recEnd = pos; recKind = 1;

-				if (ch == 39 || ch >= '0' && ch <= '9' || ch == '?' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 49;}

+				if (ch == 39 || ch >= '0' && ch <= '9' || ch == '?' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 50;}

 				else {t.kind = 1; t.val = new String(tval, 0, tlen); CheckLiteral(); return t;}

-			case 50:

+			case 51:

 				if (ch == '"' || ch == 39 || ch == '0' || ch == 92 || ch == 'n' || ch == 'r' || ch == 't') {AddCh(); goto case 15;}

 				else if (ch == 'u') {AddCh(); goto case 16;}

 				else {goto case 0;}

-			case 51:

+			case 52:

 				if (ch == '"' || ch == 39 || ch == '0' || ch == 92 || ch == 'n' || ch == 'r' || ch == 't') {AddCh(); goto case 21;}

 				else if (ch == 'u') {AddCh(); goto case 22;}

 				else {goto case 0;}

-			case 52:

+			case 53:

 				recEnd = pos; recKind = 7;

 				if (ch == '"') {AddCh(); goto case 27;}

 				else {t.kind = 7; break;}

-			case 53:

-				if (ch >= '0' && ch <= '9') {AddCh(); goto case 45;}

-				else {goto case 0;}

 			case 54:

+				if (ch >= '0' && ch <= '9') {AddCh(); goto case 46;}

+				else {goto case 0;}

+			case 55:

 				recEnd = pos; recKind = 1;

 				if (ch == 39 || ch >= '0' && ch <= '9' || ch == '?' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'q' || ch >= 's' && ch <= 'z') {AddCh(); goto case 3;}

-				else if (ch == 'r') {AddCh(); goto case 57;}

+				else if (ch == 'r') {AddCh(); goto case 58;}

 				else {t.kind = 1; t.val = new String(tval, 0, tlen); CheckLiteral(); return t;}

-			case 55:

+			case 56:

 				recEnd = pos; recKind = 1;

-				if (ch >= '0' && ch <= '9' || ch == '?' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 58;}

-				else if (ch == 39) {AddCh(); goto case 59;}

+				if (ch >= '0' && ch <= '9' || ch == '?' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 59;}

+				else if (ch == 39) {AddCh(); goto case 60;}

 				else {t.kind = 1; t.val = new String(tval, 0, tlen); CheckLiteral(); return t;}

-			case 56:

+			case 57:

 				recEnd = pos; recKind = 1;

-				if (ch >= '0' && ch <= '9' || ch == '?' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 58;}

+				if (ch >= '0' && ch <= '9' || ch == '?' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 59;}

 				else if (ch == 39) {AddCh(); goto case 7;}

 				else {t.kind = 1; t.val = new String(tval, 0, tlen); CheckLiteral(); return t;}

-			case 57:

+			case 58:

 				recEnd = pos; recKind = 1;

 				if (ch == 39 || ch >= '0' && ch <= '9' || ch == '?' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'b' && ch <= 'z') {AddCh(); goto case 4;}

-				else if (ch == 'a') {AddCh(); goto case 60;}

+				else if (ch == 'a') {AddCh(); goto case 61;}

 				else {t.kind = 1; t.val = new String(tval, 0, tlen); CheckLiteral(); return t;}

-			case 58:

+			case 59:

 				recEnd = pos; recKind = 1;

 				if (ch == 39 || ch >= '0' && ch <= '9' || ch == '?' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 8;}

 				else {t.kind = 1; t.val = new String(tval, 0, tlen); CheckLiteral(); return t;}

-			case 59:

+			case 60:

 				recEnd = pos; recKind = 6;

 				if (ch == 39 || ch >= '0' && ch <= '9' || ch == '?' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 8;}

 				else {t.kind = 6; break;}

-			case 60:

+			case 61:

 				recEnd = pos; recKind = 1;

 				if (ch == 39 || ch >= '0' && ch <= '9' || ch == '?' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'x' || ch == 'z') {AddCh(); goto case 5;}

-				else if (ch == 'y') {AddCh(); goto case 61;}

+				else if (ch == 'y') {AddCh(); goto case 62;}

 				else {t.kind = 1; t.val = new String(tval, 0, tlen); CheckLiteral(); return t;}

-			case 61:

+			case 62:

 				recEnd = pos; recKind = 5;

 				if (ch == 39 || ch == '0' || ch == '?' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 6;}

-				else if (ch >= '1' && ch <= '9') {AddCh(); goto case 62;}

+				else if (ch >= '1' && ch <= '9') {AddCh(); goto case 63;}

 				else {t.kind = 5; break;}

-			case 62:

+			case 63:

 				recEnd = pos; recKind = 5;

-				if (ch == 39 || ch == '?' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 49;}

-				else if (ch >= '0' && ch <= '9') {AddCh(); goto case 62;}

+				if (ch == 39 || ch == '?' || ch >= 'A' && ch <= 'Z' || ch == '_' || ch >= 'a' && ch <= 'z') {AddCh(); goto case 50;}

+				else if (ch >= '0' && ch <= '9') {AddCh(); goto case 63;}

 				else {t.kind = 5; break;}

-			case 63:

-				{t.kind = 49; break;}

 			case 64:

 				{t.kind = 81; break;}

 			case 65:

@@ -877,26 +877,26 @@ public class Scanner {
 				{t.kind = 124; break;}

 			case 89:

 				recEnd = pos; recKind = 8;

-				if (ch == ':') {AddCh(); goto case 29;}

+				if (ch == ':') {AddCh(); goto case 30;}

 				else if (ch == '=') {AddCh(); goto case 65;}

 				else if (ch == '|') {AddCh(); goto case 66;}

 				else {t.kind = 8; break;}

 			case 90:

-				recEnd = pos; recKind = 9;

+				recEnd = pos; recKind = 10;

 				if (ch == '|') {AddCh(); goto case 81;}

-				else {t.kind = 9; break;}

+				else {t.kind = 10; break;}

 			case 91:

-				recEnd = pos; recKind = 38;

-				if (ch == '>') {AddCh(); goto case 32;}

+				recEnd = pos; recKind = 40;

+				if (ch == '>') {AddCh(); goto case 33;}

 				else if (ch == '=') {AddCh(); goto case 97;}

-				else {t.kind = 38; break;}

+				else {t.kind = 40; break;}

 			case 92:

 				recEnd = pos; recKind = 122;

-				if (ch == '>') {AddCh(); goto case 33;}

+				if (ch == '>') {AddCh(); goto case 34;}

 				else {t.kind = 122; break;}

 			case 93:

 				recEnd = pos; recKind = 115;

-				if (ch == 'i') {AddCh(); goto case 41;}

+				if (ch == 'i') {AddCh(); goto case 42;}

 				else if (ch == '=') {AddCh(); goto case 69;}

 				else {t.kind = 115; break;}

 			case 94:

@@ -904,20 +904,20 @@ public class Scanner {
 				if (ch == '.') {AddCh(); goto case 98;}

 				else {t.kind = 77; break;}

 			case 95:

-				recEnd = pos; recKind = 56;

+				recEnd = pos; recKind = 57;

 				if (ch == '=') {AddCh(); goto case 99;}

-				else {t.kind = 56; break;}

+				else {t.kind = 57; break;}

 			case 96:

-				recEnd = pos; recKind = 57;

+				recEnd = pos; recKind = 58;

 				if (ch == '=') {AddCh(); goto case 68;}

-				else {t.kind = 57; break;}

+				else {t.kind = 58; break;}

 			case 97:

-				recEnd = pos; recKind = 52;

+				recEnd = pos; recKind = 53;

 				if (ch == '>') {AddCh(); goto case 75;}

-				else {t.kind = 52; break;}

+				else {t.kind = 53; break;}

 			case 98:

 				recEnd = pos; recKind = 132;

-				if (ch == '.') {AddCh(); goto case 44;}

+				if (ch == '.') {AddCh(); goto case 45;}

 				else {t.kind = 132; break;}

 			case 99:

 				recEnd = pos; recKind = 99;