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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, lexer
type
ElnaListNode* = record
next: ^ElnaListNode
end
ElnaList* = record
first: ^ElnaListNode;
last: ^ElnaListNode
end
(* Type representation. *)
ElnaTypeKind* = (primitive, enumeration, _record, pointer, array, alias, procedure)
ElnaType* = record
kind: ElnaTypeKind;
size: Word;
alignment: Word
end
ElnaTypeAlias* = record(ElnaType)
base: ^ElnaType
end
ElnaTypeEnumeration* = record(ElnaType)
members: ^[]const Word8;
length: Word
end
ElnaTypeField* = record
name: []const Word8;
field_type: ^ElnaType
end
ElnaTypeRecord* = record(ElnaType)
members: ^ElnaTypeField;
length: Word
end
ElnaTypePointer* = record(ElnaType)
base: ^ElnaType
end
ElnaTypeArray* = record(ElnaType)
base: ^ElnaType;
length: Word
end
ElnaTypeProcedure* = record(ElnaType)
return_type: ^ElnaType
end
(* Abstract syntax tree nodes. *)
ElnaTreeKind* = (
integer_literal,
string_literal,
character_literal,
boolean_literal,
variable_expression,
field_access_expression,
dereference_expression,
unary_expression,
binary_expression,
call,
call_statement,
goto_statement,
label_declaration,
return_statement,
assign_statement,
if_statement,
procedure_declaration,
variable_declaration,
enumeration_type_expression,
named_type_expression,
type_declaration,
module_declaration,
record_type_expression,
pointer_type_expression,
array_type_expression,
null,
trait_expression,
array_access_expression,
_cast
)
ElnaTreeNode* = record
kind: ElnaTreeKind;
position: ElnaPosition
end
ElnaTreeTypeExpression* = record(ElnaTreeNode)
end
ElnaTreeExpression* = record(ElnaTreeNode)
type_decoration: ^ElnaType
end
ElnaTreeIntegerLiteral* = record(ElnaTreeExpression)
value: Word
end
ElnaTreeCharacterLiteral* = record(ElnaTreeExpression)
value: Word8
end
ElnaTreeNilLiteral* = record(ElnaTreeExpression)
end
ElnaTreeBooleanLiteral* = record(ElnaTreeExpression)
value: Bool
end
ElnaTreeStringLiteral* = record(ElnaTreeExpression)
value: []const Word8
end
ElnaTreeVariableExpression* = record(ElnaTreeExpression)
name: []const Word8
end
ElnaTreeCastExpression* = record(ElnaTreeExpression)
expression: ^ElnaTreeExpression;
type_expression: ^ElnaTreeTypeExpression
end
ElnaTreeDereferenceExpression* = record(ElnaTreeExpression)
pointer: ^ElnaTreeExpression
end
ElnaTreeBinaryExpression* = record(ElnaTreeExpression)
lhs: ^ElnaTreeExpression;
rhs: ^ElnaTreeExpression;
operator: ElnaLexerKind
end
ElnaTreeUnaryExpression* = record(ElnaTreeExpression)
operand: ^ElnaTreeExpression;
operator: ElnaLexerKind
end
ElnaTreeFieldAccessExpression* = record(ElnaTreeExpression)
aggregate: ^ElnaTreeExpression;
field: []const Word8
end
ElnaTreeArrayAccessExpression* = record(ElnaTreeExpression)
array: ^ElnaTreeExpression;
index: ^ElnaTreeExpression
end
ElnaTreeTraitExpression* = record(ElnaTreeExpression)
name: []const Word8;
argument: ^ElnaTreeTypeExpression
end
ElnaTreeExpressionList* = record
expression: ^ElnaTreeExpression;
next: ^ElnaTreeExpressionList
end
ElnaTreeCall* = record(ElnaTreeExpression)
callee: ^ElnaTreeVariableExpression;
arguments: ^ElnaTreeExpressionList;
count: Word
end
(* Statements. *)
ElnaTreeStatement* = record(ElnaTreeNode)
next: ^ElnaTreeStatement
end
ElnaTreeConditionalStatements* = record
condition: ^ElnaTreeExpression;
statements: ^ElnaTreeStatement;
next: ^ElnaTreeConditionalStatements
end
ElnaTreeIfStatement* = record(ElnaTreeStatement)
conditionals: ^ElnaTreeConditionalStatements;
_else: ^ElnaTreeStatement
end
ElnaTreeGotoStatement* = record(ElnaTreeStatement)
label: []const Word8
end
ElnaTreeAssignStatement* = record(ElnaTreeStatement)
assignee: ^ElnaTreeExpression;
assignment: ^ElnaTreeExpression
end
ElnaTreeReturnStatement* = record(ElnaTreeStatement)
returned: ^ElnaTreeExpression
end
ElnaTreeLabelDeclaration* = record(ElnaTreeStatement)
label: []const Word8
end
ElnaTreeCallStatement* = record(ElnaTreeStatement)
call: ^ElnaTreeCall
end
(* Type expressions. *)
ElnaTreeEnumeration* = record
name: []const Word8;
next: ^ElnaTreeEnumeration
end
ElnaTreeEnumerationTypeExpression* = record(ElnaTreeTypeExpression)
members: ^ElnaTreeEnumeration;
length: Word
end
ElnaTreeField* = record
name: []const Word8;
type_expression: ^ElnaTreeTypeExpression;
next: ^ElnaTreeField
end
ElnaTreeRecordTypeExpression* = record(ElnaTreeTypeExpression)
members: ^ElnaTreeField;
length: Word;
parent: []const Word8
end
ElnaTreeNamedTypeExpression* = record(ElnaTreeTypeExpression)
name: []const Word8
end
ElnaTreePointerTypeExpression* = record(ElnaTreeTypeExpression)
base: ^ElnaTreeTypeExpression
end
ElnaTreeArrayTypeExpression* = record(ElnaTreeTypeExpression)
base: ^ElnaTreeTypeExpression;
length: ^ElnaTreeExpression
end
(* Declarations. *)
ElnaTreeDeclaration* = record(ElnaTreeNode)
next: ^ElnaTreeDeclaration;
name: []const Word8
end
ElnaTreeVariableDeclaration* = record(ElnaTreeDeclaration)
type_expression: ^ElnaTreeTypeExpression
end
ElnaTreeProcedureDeclaration* = record(ElnaTreeDeclaration)
body: ^ElnaTreeStatement;
temporaries: ^ElnaTreeVariableDeclaration;
parameters: ^ElnaTreeVariableDeclaration;
return_type: ^ElnaTreeTypeExpression;
is_extern: Bool
end
ElnaTreeTypeDeclaration* = record(ElnaTreeDeclaration)
type_expression: ^ElnaTreeTypeExpression
end
ElnaTreeModuleDeclaration* = record(ElnaTreeNode)
types: ^ElnaTreeDeclaration;
globals: ^ElnaTreeVariableDeclaration;
procedures: ^ElnaTreeProcedureDeclaration;
body: ^ElnaTreeStatement
end
proc elna_list_initialize*(list: ^ElnaList)
begin
list^.first := nil;
list^.last := nil
return
proc elna_list_append*(list: ^ElnaList; element: ^ElnaListNode) -> ^ElnaListNode
begin
if element <> nil then
if list^.first = nil then
list^.first := element
else
list^.last^.next := element
end;
list^.last := element
end
return element
proc elna_list_prepend*(list: ^ElnaList; element: ^ElnaListNode)
begin
element^.next := list^.first;
list^.first := element;
if list^.last = nil then
list^.last := element
end
return
proc elna_list_insert*(list: ^ElnaList; existing, new: ^ElnaListNode)
begin
if existing^.next = nil then
list^.last := new
else
new^.next := existing^.next
end;
existing^.next := new
return
proc elna_list_empty*(list: ^ElnaList) -> Bool
return list^.first = nil
end.
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