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(* This Source Code Form is subject to the terms of the Mozilla Public License,
v. 2.0. If a copy of the MPL was not distributed with this file, You can
obtain one at https://mozilla.org/MPL/2.0/. *)
module
import common, sys.posix.cstdio, sys.posix.cstdlib, lexer, ast
type
ElnaErrorKind* = (
unexpected_token,
undefined_symbol,
undefined_member,
duplicate_declaration
)
ElnaError* = record(ElnaListNode)
kind: ElnaErrorKind;
position: ElnaPosition
end
ElnaErrorUnexpectedToken* = record(ElnaError)
expected: [16]ElnaLexerKind;
possibilities: Word;
got: ElnaLexerKind
end
ElnaErrorUndefinedSymbol* = record(ElnaError)
symbol_name: []const Word8
end
ElnaErrorUndefinedMember* = record(ElnaError)
aggregate_name: []const Word8;
member_name: []const Word8
end
ElnaErrorDuplicateDeclaration* = record(ElnaError)
symbol_name: []const Word8
end
proc elna_error_unexpected_token_create*(cursor: ^ElnaLexerCursor; number_of_expected: Word) -> ^ElnaErrorUnexpectedToken
var
parser_error: ^ElnaErrorUnexpectedToken
begin
parser_error := malloc#[ElnaErrorUnexpectedToken](#size(ElnaErrorUnexpectedToken));
parser_error^.next := nil;
parser_error^.kind := ElnaErrorKind.unexpected_token;
parser_error^.position := cursor^.position;
parser_error^.possibilities := number_of_expected;
parser_error^.got := cursor^.token^.kind
return parser_error
proc elna_error_duplicate_declaration_create*(position: ElnaPosition; symbol_name: []const Word8) -> ^ElnaErrorDuplicateDeclaration
var
declaration_error: ^ElnaErrorDuplicateDeclaration
begin
declaration_error := malloc#[ElnaErrorDuplicateDeclaration](#size(ElnaErrorDuplicateDeclaration));
declaration_error^.next := nil;
declaration_error^.kind := ElnaErrorKind.duplicate_declaration;
declaration_error^.position := position;
declaration_error^.symbol_name := symbol_name
return declaration_error
proc elna_error_undefined_symbol_create*(position: ElnaPosition; symbol_name: []const Word8) -> ^ElnaErrorUndefinedSymbol
var
result: ^ElnaErrorUndefinedSymbol
begin
result := malloc#[ElnaErrorUndefinedSymbol](#size(ElnaErrorUndefinedSymbol));
result^.next := nil;
result^.kind := ElnaErrorKind.undefined_symbol;
result^.position := position;
result^.symbol_name := symbol_name
return result
proc elna_error_undefined_member_create*(position: ElnaPosition; aggregate, member: []const Word8) -> ^ElnaErrorUndefinedMember
var
result: ^ElnaErrorUndefinedMember
begin
result := malloc#[ElnaErrorUndefinedMember](#size(ElnaErrorUndefinedMember));
result^.next := nil;
result^.kind := ElnaErrorKind.undefined_member;
result^.position := position;
result^.aggregate_name := aggregate;
result^.member_name := member
return result
proc elna_error_print_token*(kind: ElnaLexerKind)
begin
case kind of
ElnaLexerKind._const:
write_s("\"const\"")
| ElnaLexerKind._var:
write_s("\"var\"")
| ElnaLexerKind._proc:
write_s("\"proc\"")
| ElnaLexerKind._type:
write_s("\"type\"")
| ElnaLexerKind._begin:
write_s("\"begin\"")
| ElnaLexerKind._end:
write_s("\"end\"")
| ElnaLexerKind._if:
write_s("\"if\"")
| ElnaLexerKind._then:
write_s("\"then\"")
| ElnaLexerKind._else:
write_s("\"else\"")
| ElnaLexerKind._elsif:
write_s("\"elsif\"")
| ElnaLexerKind._extern:
write_s("\"extern\"")
| ElnaLexerKind._record:
write_s("\"record\"")
| ElnaLexerKind.boolean:
write_s("BOOLEAN")
| ElnaLexerKind.null:
write_s("NIL")
| ElnaLexerKind.and:
write_s("\"&\"")
| ElnaLexerKind._or:
write_s("\"or\"")
| ElnaLexerKind._xor:
write_s("\"xor\"")
| ElnaLexerKind.not:
write_s("\"~\"")
| ElnaLexerKind._return:
write_s("\"return\"")
| ElnaLexerKind._cast:
write_s("\"cast\"")
| ElnaLexerKind.trait:
write_s("TRAIT")
| ElnaLexerKind.left_paren:
write_s("\"(\"")
| ElnaLexerKind.right_paren:
write_s("\")\"")
| ElnaLexerKind.left_square:
write_s("\"[\"")
| ElnaLexerKind.right_square:
write_s("\"]\"")
| ElnaLexerKind.greater_equal:
write_s("\">=\"")
| ElnaLexerKind.less_equal:
write_s("\"<=\"")
| ElnaLexerKind.greater_than:
write_s("\">\"")
| ElnaLexerKind.less_than:
write_s("\"<\"")
| ElnaLexerKind.not_equal:
write_s("\"<>\"")
| ElnaLexerKind.equals:
write_s("\"=\"")
| ElnaLexerKind.semicolon:
write_s("\";\"")
| ElnaLexerKind.dot:
write_s("\".\"")
| ElnaLexerKind.comma:
write_s("\",\"")
| ElnaLexerKind.plus:
write_s("\"+\"")
| ElnaLexerKind.arrow:
write_s("\"->\"")
| ElnaLexerKind.minus:
write_s("\"-\"")
| ElnaLexerKind.multiplication:
write_s("\"*\"")
| ElnaLexerKind.division:
write_s("\"/\"")
| ElnaLexerKind.remainder:
write_s("\"%\"")
| ElnaLexerKind.assignment:
write_s("\":=\"")
| ElnaLexerKind.colon:
write_s("\":\"")
| ElnaLexerKind.hat:
write_s("\"^\"")
| ElnaLexerKind.at:
write_s("\"@\"")
| ElnaLexerKind.comment:
write_s("COMMENT")
| ElnaLexerKind.string:
write_s("STRING")
| ElnaLexerKind.character:
write_s("CHARACTER")
| ElnaLexerKind.integer:
write_s("INTEGER")
| ElnaLexerKind.word:
write_s("WORD")
| ElnaLexerKind.eof:
write_s("EOF")
else
write_s("UNKNOWN")
end
return
proc elna_error_print_unexpected_token*(current_error: ^ElnaErrorUnexpectedToken)
begin
write_s("Parse error: Expecting token ");
elna_error_print_token(current_error^.expected[1]);
write_s("; got ");
elna_error_print_token(current_error^.got);
write_s(". ")
return
proc elna_error_print_undefined_member*(current_error: ^ElnaErrorUndefinedMember)
begin
write_s("Semantic error: Member \"");
write_s(current_error^.member_name);
write_s("\" is not accessible on \"");
write_s(current_error^.aggregate_name);
write_s("\". ")
return
proc elna_error_print_undefined_symbol*(current_error: ^ElnaErrorUndefinedSymbol)
begin
write_s("Semantic error: Undefined symbol \"");
write_s(current_error^.symbol_name);
write_s("\". ")
return
proc elna_error_print_duplicate_declaration*(current_error: ^ElnaErrorDuplicateDeclaration)
begin
write_s("Semantic error: Duplicate declaration \"");
write_s(current_error^.symbol_name);
write_s("\". ")
return
proc elna_error_print*(current_error: ^ElnaError)
begin
case current_error^.kind of
ElnaErrorKind.unexpected_token:
elna_error_print_unexpected_token(cast(current_error: ^ElnaErrorUnexpectedToken))
| ElnaErrorKind.undefined_symbol:
elna_error_print_undefined_symbol(cast(current_error: ^ElnaErrorUndefinedSymbol))
| ElnaErrorKind.undefined_member:
elna_error_print_undefined_member(cast(current_error: ^ElnaErrorUndefinedMember))
| ElnaErrorKind.duplicate_declaration:
elna_error_print_duplicate_declaration(cast(current_error: ^ElnaErrorDuplicateDeclaration))
else
write_s("Unknown error. ")
end;
write_s("Line ");
write_u(current_error^.position.start_location.line);
write_s(", column ");
write_u(current_error^.position.start_location.column);
write_s(".\n")
return
end.
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