fix: Only allow YulIdentifier in the Yul variable declaration

Previously, Yul identifiers could have dots in the name but that's not
the case starting from 0.7. As such, we need to disallow these forms for
the variable declaration and instead only accept the identifier, as is
done by the upstream grammar.

.changeset/afraid-shoes-yell.md

@@ -0,0 +1,5 @@
+---
+"@nomicfoundation/slang": patch
+---
+
+Restrict the grammar to correctly only allow an identifier in Yul variable declaration

crates/solidity/inputs/language/src/definition.rs

@@ -4209,7 +4209,7 @@ codegen_language_macros::compile!(Language(
                             name = YulVariableDeclarationStatement,
                             fields = (
                                 let_keyword = Required(YulLetKeyword),
-                                names = Required(YulPaths),
+                                names = Required(YulIdentifier),
                                 value = Optional(reference = YulVariableDeclarationValue)
                             )
                         ),

crates/solidity/testing/snapshots/cst_output/YulVariableDeclarationStatement/colon_equal_separated/generated/0.4.11-success.yml

@@ -11,11 +11,8 @@ Tree:
       - (leading_trivia꞉ SingleLineComment): '// ColonEqual was two separate tokens before "0.5....' # (0..53)
       - (leading_trivia꞉ EndOfLine): "\n" # (53..54)
       - (let_keyword꞉ YulLetKeyword): "let" # (54..57)
-      - (names꞉ YulPaths): # " foo" (57..61)
-          - (item꞉ YulPath): # " foo" (57..61)
-              - (item꞉ YulPathComponent): # " foo" (57..61)
-                  - (leading_trivia꞉ Whitespace): " " # (57..58)
-                  - (variant꞉ YulIdentifier): "foo" # (58..61)
+      - (leading_trivia꞉ Whitespace): " " # (57..58)
+      - (names꞉ YulIdentifier): "foo" # (58..61)
       - (value꞉ YulVariableDeclarationValue): # " : = 0\n" (61..68)
           - (assignment꞉ YulAssignmentOperator) ► (variant꞉ YulColonAndEqual): # " : =" (61..65)
               - (leading_trivia꞉ Whitespace): " " # (61..62)

crates/solidity/testing/snapshots/cst_output/YulVariableDeclarationStatement/colon_equal_separated/generated/0.5.5-failure.yml

@@ -19,10 +19,7 @@ Tree:
       - (leading_trivia꞉ SingleLineComment): '// ColonEqual was two separate tokens before "0.5....' # (0..53)
       - (leading_trivia꞉ EndOfLine): "\n" # (53..54)
       - (let_keyword꞉ YulLetKeyword): "let" # (54..57)
-      - (names꞉ YulPaths): # " foo" (57..61)
-          - (item꞉ YulPath): # " foo" (57..61)
-              - (item꞉ YulPathComponent): # " foo" (57..61)
-                  - (leading_trivia꞉ Whitespace): " " # (57..58)
-                  - (variant꞉ YulIdentifier): "foo" # (58..61)
+      - (leading_trivia꞉ Whitespace): " " # (57..58)
+      - (names꞉ YulIdentifier): "foo" # (58..61)
       - (leading_trivia꞉ Whitespace): " " # (61..62)
       - (SKIPPED): ": = 0\n" # (62..68)

crates/solidity/testing/snapshots/cst_output/YulVariableDeclarationStatement/identifier_with_dots/generated/0.4.11-failure.yml

@@ -0,0 +1,21 @@
+# This file is generated automatically by infrastructure scripts. Please don't edit by hand.
+
+Source: >
+  1  │ let a.b.c := 1                                                                   │ 0..14
+
+Errors: # 1 total
+  - >
+    Error: Expected Colon or ColonEqual.
+       ╭─[crates/solidity/testing/snapshots/cst_output/YulVariableDeclarationStatement/identifier_with_dots/input.sol:1:6]
+       │
+     1 │ let a.b.c := 1
+       │      ─────┬────  
+       │           ╰────── Error occurred here.
+    ───╯
+
+Tree:
+  - (YulVariableDeclarationStatement): # "let a.b.c := 1\n" (0..15)
+      - (let_keyword꞉ YulLetKeyword): "let" # (0..3)
+      - (leading_trivia꞉ Whitespace): " " # (3..4)
+      - (names꞉ YulIdentifier): "a" # (4..5)
+      - (SKIPPED): ".b.c := 1\n" # (5..15)

crates/solidity/testing/snapshots/cst_output/YulVariableDeclarationStatement/identifier_with_dots/generated/0.5.5-failure.yml

@@ -0,0 +1,21 @@
+# This file is generated automatically by infrastructure scripts. Please don't edit by hand.
+
+Source: >
+  1  │ let a.b.c := 1                                                                   │ 0..14
+
+Errors: # 1 total
+  - >
+    Error: Expected ColonEqual.
+       ╭─[crates/solidity/testing/snapshots/cst_output/YulVariableDeclarationStatement/identifier_with_dots/input.sol:1:6]
+       │
+     1 │ let a.b.c := 1
+       │      ─────┬────  
+       │           ╰────── Error occurred here.
+    ───╯
+
+Tree:
+  - (YulVariableDeclarationStatement): # "let a.b.c := 1\n" (0..15)
+      - (let_keyword꞉ YulLetKeyword): "let" # (0..3)
+      - (leading_trivia꞉ Whitespace): " " # (3..4)
+      - (names꞉ YulIdentifier): "a" # (4..5)
+      - (SKIPPED): ".b.c := 1\n" # (5..15)

crates/solidity/testing/snapshots/cst_output/YulVariableDeclarationStatement/identifier_with_dots/generated/0.5.8-success.yml

@@ -8,11 +8,8 @@ Errors: []
 Tree:
   - (YulVariableDeclarationStatement): # "let a.b.c := 1\n" (0..15)
       - (let_keyword꞉ YulLetKeyword): "let" # (0..3)
-      - (names꞉ YulPaths): # " a.b.c" (3..9)
-          - (item꞉ YulPath): # " a.b.c" (3..9)
-              - (item꞉ YulPathComponent): # " a.b.c" (3..9)
-                  - (leading_trivia꞉ Whitespace): " " # (3..4)
-                  - (variant꞉ YulIdentifier): "a.b.c" # (4..9)
+      - (leading_trivia꞉ Whitespace): " " # (3..4)
+      - (names꞉ YulIdentifier): "a.b.c" # (4..9)
       - (value꞉ YulVariableDeclarationValue): # " := 1\n" (9..15)
           - (assignment꞉ YulAssignmentOperator): # " :=" (9..12)
               - (leading_trivia꞉ Whitespace): " " # (9..10)

crates/solidity/testing/snapshots/cst_output/YulVariableDeclarationStatement/identifier_with_dots/generated/0.7.0-failure.yml

@@ -0,0 +1,21 @@
+# This file is generated automatically by infrastructure scripts. Please don't edit by hand.
+
+Source: >
+  1  │ let a.b.c := 1                                                                   │ 0..14
+
+Errors: # 1 total
+  - >
+    Error: Expected ColonEqual.
+       ╭─[crates/solidity/testing/snapshots/cst_output/YulVariableDeclarationStatement/identifier_with_dots/input.sol:1:6]
+       │
+     1 │ let a.b.c := 1
+       │      ─────┬────  
+       │           ╰────── Error occurred here.
+    ───╯
+
+Tree:
+  - (YulVariableDeclarationStatement): # "let a.b.c := 1\n" (0..15)
+      - (let_keyword꞉ YulLetKeyword): "let" # (0..3)
+      - (leading_trivia꞉ Whitespace): " " # (3..4)
+      - (names꞉ YulIdentifier): "a" # (4..5)
+      - (SKIPPED): ".b.c := 1\n" # (5..15)

crates/solidity/testing/snapshots/cst_output/YulVariableDeclarationStatement/keyword_bytes/generated/0.7.1-success.yml

@@ -11,9 +11,6 @@ Tree:
       - (leading_trivia꞉ SingleLineComment): "// Unreserved in Yul specifically since 0.7.1:" # (0..46)
       - (leading_trivia꞉ EndOfLine): "\n" # (46..47)
       - (let_keyword꞉ YulLetKeyword): "let" # (47..50)
-      - (names꞉ YulPaths): # " bytes\n" (50..57)
-          - (item꞉ YulPath): # " bytes\n" (50..57)
-              - (item꞉ YulPathComponent): # " bytes\n" (50..57)
-                  - (leading_trivia꞉ Whitespace): " " # (50..51)
-                  - (variant꞉ YulIdentifier): "bytes" # (51..56)
-                  - (trailing_trivia꞉ EndOfLine): "\n" # (56..57)
+      - (leading_trivia꞉ Whitespace): " " # (50..51)
+      - (names꞉ YulIdentifier): "bytes" # (51..56)
+      - (trailing_trivia꞉ EndOfLine): "\n" # (56..57)

crates/solidity/testing/snapshots/cst_output/YulVariableDeclarationStatement/keyword_bytes1/generated/0.7.1-success.yml

@@ -11,9 +11,6 @@ Tree:
       - (leading_trivia꞉ SingleLineComment): "// Unreserved in Yul specifically since 0.7.1:" # (0..46)
       - (leading_trivia꞉ EndOfLine): "\n" # (46..47)
       - (let_keyword꞉ YulLetKeyword): "let" # (47..50)
-      - (names꞉ YulPaths): # " bytes1\n" (50..58)
-          - (item꞉ YulPath): # " bytes1\n" (50..58)
-              - (item꞉ YulPathComponent): # " bytes1\n" (50..58)
-                  - (leading_trivia꞉ Whitespace): " " # (50..51)
-                  - (variant꞉ YulIdentifier): "bytes1" # (51..57)
-                  - (trailing_trivia꞉ EndOfLine): "\n" # (57..58)
+      - (leading_trivia꞉ Whitespace): " " # (50..51)
+      - (names꞉ YulIdentifier): "bytes1" # (51..57)
+      - (trailing_trivia꞉ EndOfLine): "\n" # (57..58)

crates/solidity/testing/snapshots/cst_output/YulVariableDeclarationStatement/keyword_bytes11/generated/0.7.1-success.yml

@@ -11,9 +11,6 @@ Tree:
       - (leading_trivia꞉ SingleLineComment): "// Unreserved in Yul specifically since 0.7.1:" # (0..46)
       - (leading_trivia꞉ EndOfLine): "\n" # (46..47)
       - (let_keyword꞉ YulLetKeyword): "let" # (47..50)
-      - (names꞉ YulPaths): # " bytes11\n" (50..59)
-          - (item꞉ YulPath): # " bytes11\n" (50..59)
-              - (item꞉ YulPathComponent): # " bytes11\n" (50..59)
-                  - (leading_trivia꞉ Whitespace): " " # (50..51)
-                  - (variant꞉ YulIdentifier): "bytes11" # (51..58)
-                  - (trailing_trivia꞉ EndOfLine): "\n" # (58..59)
+      - (leading_trivia꞉ Whitespace): " " # (50..51)
+      - (names꞉ YulIdentifier): "bytes11" # (51..58)
+      - (trailing_trivia꞉ EndOfLine): "\n" # (58..59)

crates/solidity/testing/snapshots/cst_output/YulVariableDeclarationStatement/keyword_ufixed184x80/generated/0.4.11-success.yml

@@ -11,9 +11,6 @@ Tree:
       - (leading_trivia꞉ SingleLineComment): "// This form is reserved only since 0.4.14 until 0..." # (0..62)
       - (leading_trivia꞉ EndOfLine): "\n" # (62..63)
       - (let_keyword꞉ YulLetKeyword): "let" # (63..66)
-      - (names꞉ YulPaths): # " ufixed184x80\n" (66..80)
-          - (item꞉ YulPath): # " ufixed184x80\n" (66..80)
-              - (item꞉ YulPathComponent): # " ufixed184x80\n" (66..80)
-                  - (leading_trivia꞉ Whitespace): " " # (66..67)
-                  - (variant꞉ YulIdentifier): "ufixed184x80" # (67..79)
-                  - (trailing_trivia꞉ EndOfLine): "\n" # (79..80)
+      - (leading_trivia꞉ Whitespace): " " # (66..67)
+      - (names꞉ YulIdentifier): "ufixed184x80" # (67..79)
+      - (trailing_trivia꞉ EndOfLine): "\n" # (79..80)

crates/solidity/testing/snapshots/cst_output/YulVariableDeclarationStatement/keyword_ufixed184x80/generated/0.7.1-success.yml

@@ -11,9 +11,6 @@ Tree:
       - (leading_trivia꞉ SingleLineComment): "// This form is reserved only since 0.4.14 until 0..." # (0..62)
       - (leading_trivia꞉ EndOfLine): "\n" # (62..63)
       - (let_keyword꞉ YulLetKeyword): "let" # (63..66)
-      - (names꞉ YulPaths): # " ufixed184x80\n" (66..80)
-          - (item꞉ YulPath): # " ufixed184x80\n" (66..80)
-              - (item꞉ YulPathComponent): # " ufixed184x80\n" (66..80)
-                  - (leading_trivia꞉ Whitespace): " " # (66..67)
-                  - (variant꞉ YulIdentifier): "ufixed184x80" # (67..79)
-                  - (trailing_trivia꞉ EndOfLine): "\n" # (79..80)
+      - (leading_trivia꞉ Whitespace): " " # (66..67)
+      - (names꞉ YulIdentifier): "ufixed184x80" # (67..79)
+      - (trailing_trivia꞉ EndOfLine): "\n" # (79..80)

crates/solidity/testing/snapshots/cst_output/YulVariableDeclarationStatement/keyword_ufixed8x0/generated/0.4.11-success.yml

@@ -11,9 +11,6 @@ Tree:
       - (leading_trivia꞉ SingleLineComment): "// This form is reserved only since 0.4.14 until 0..." # (0..62)
       - (leading_trivia꞉ EndOfLine): "\n" # (62..63)
       - (let_keyword꞉ YulLetKeyword): "let" # (63..66)
-      - (names꞉ YulPaths): # " ufixed8x0\n" (66..77)
-          - (item꞉ YulPath): # " ufixed8x0\n" (66..77)
-              - (item꞉ YulPathComponent): # " ufixed8x0\n" (66..77)
-                  - (leading_trivia꞉ Whitespace): " " # (66..67)
-                  - (variant꞉ YulIdentifier): "ufixed8x0" # (67..76)
-                  - (trailing_trivia꞉ EndOfLine): "\n" # (76..77)
+      - (leading_trivia꞉ Whitespace): " " # (66..67)
+      - (names꞉ YulIdentifier): "ufixed8x0" # (67..76)
+      - (trailing_trivia꞉ EndOfLine): "\n" # (76..77)

crates/solidity/testing/snapshots/cst_output/YulVariableDeclarationStatement/keyword_ufixed8x0/generated/0.7.1-success.yml

@@ -11,9 +11,6 @@ Tree:
       - (leading_trivia꞉ SingleLineComment): "// This form is reserved only since 0.4.14 until 0..." # (0..62)
       - (leading_trivia꞉ EndOfLine): "\n" # (62..63)
       - (let_keyword꞉ YulLetKeyword): "let" # (63..66)
-      - (names꞉ YulPaths): # " ufixed8x0\n" (66..77)
-          - (item꞉ YulPath): # " ufixed8x0\n" (66..77)
-              - (item꞉ YulPathComponent): # " ufixed8x0\n" (66..77)
-                  - (leading_trivia꞉ Whitespace): " " # (66..67)
-                  - (variant꞉ YulIdentifier): "ufixed8x0" # (67..76)
-                  - (trailing_trivia꞉ EndOfLine): "\n" # (76..77)
+      - (leading_trivia꞉ Whitespace): " " # (66..67)
+      - (names꞉ YulIdentifier): "ufixed8x0" # (67..76)
+      - (trailing_trivia꞉ EndOfLine): "\n" # (76..77)

crates/solidity/testing/snapshots/cst_output/YulVariableDeclarationStatement/keyword_ufixed8x8/generated/0.7.1-success.yml

@@ -11,9 +11,6 @@ Tree:
       - (leading_trivia꞉ SingleLineComment): "// This form is always reserved until 0.7.1 in Yul..." # (0..51)
       - (leading_trivia꞉ EndOfLine): "\n" # (51..52)
       - (let_keyword꞉ YulLetKeyword): "let" # (52..55)
-      - (names꞉ YulPaths): # " ufixed8x8\n" (55..66)
-          - (item꞉ YulPath): # " ufixed8x8\n" (55..66)
-              - (item꞉ YulPathComponent): # " ufixed8x8\n" (55..66)
-                  - (leading_trivia꞉ Whitespace): " " # (55..56)
-                  - (variant꞉ YulIdentifier): "ufixed8x8" # (56..65)
-                  - (trailing_trivia꞉ EndOfLine): "\n" # (65..66)
+      - (leading_trivia꞉ Whitespace): " " # (55..56)
+      - (names꞉ YulIdentifier): "ufixed8x8" # (56..65)
+      - (trailing_trivia꞉ EndOfLine): "\n" # (65..66)