Cleanup the exprs namespace for the episode 5
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</g>
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</g>
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</svg>
|
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|
After Width: | Height: | Size: 16 KiB |
|
|
@ -84,7 +84,8 @@ Deducted from https://www.aosabook.org/en/llvm.html
|
|||
- Finally we fully lower =lir= to =LLVM IR= and pass it to the object generator
|
||||
to generate object files.
|
||||
- Call the default =c compiler= to link the object files and generate the machine code.
|
||||
* Episode 4 - The reader
|
||||
* DONE Episode 4 - The reader
|
||||
CLOSED: [2021-07-27 Tue 22:50]
|
||||
** What is a Parser ?
|
||||
To put it simply, Parser converts the source code to an [[https://en.wikipedia.org/wiki/Abstract_syntax_tree][AST]]
|
||||
*** Algorithms
|
||||
|
|
@ -110,3 +111,21 @@ Read More:
|
|||
#+END_SRC
|
||||
- LL(1.5)?
|
||||
- O(n)
|
||||
* Episode 5 - The Abstract Syntax Tree
|
||||
** What is an AST?
|
||||
Ast is a tree representation of the abstract syntactic structure of source code. It's just a tree made of nodes that each node is
|
||||
a data structure describing the syntax.
|
||||
|
||||
#+BEGIN_SRC lisp
|
||||
;; pseudo code
|
||||
(def main (fn () 4))
|
||||
(prn (main))
|
||||
#+END_SRC
|
||||
|
||||
|
||||
[[./imgs/ast.svg]]
|
||||
** The =Expression= abstract class
|
||||
*** Expressions
|
||||
- Expressions vs Statements
|
||||
- Serene(Lisp) and expressions
|
||||
** Node & AST
|
||||
|
|
|
|||
|
|
@ -44,7 +44,7 @@ class Expression;
|
|||
using Node = std::shared_ptr<Expression>;
|
||||
using ErrorPtr = std::shared_ptr<errors::Error>;
|
||||
|
||||
// tree? Yupe, Errors can be stackable which makes
|
||||
// tree? Yupe, Errors can be stackable which makes a vector of them a tree
|
||||
using ErrorTree = std::vector<ErrorPtr>;
|
||||
|
||||
using MaybeNode = Result<Node, ErrorTree>;
|
||||
|
|
@ -53,6 +53,7 @@ using Ast = std::vector<Node>;
|
|||
using MaybeAst = Result<Ast, ErrorTree>;
|
||||
|
||||
static auto EmptyNode = MaybeNode::success(nullptr);
|
||||
|
||||
/// The base class of the expressions which provides the common interface for
|
||||
/// the expressions to implement.
|
||||
class Expression {
|
||||
|
|
@ -80,6 +81,10 @@ public:
|
|||
/// \param ctx is the context object of the semantic analyzer.
|
||||
virtual MaybeNode analyze(SereneContext &ctx) = 0;
|
||||
|
||||
/// Genenates the correspondig SLIR of the expressoin and attach it to the
|
||||
/// module of the given namespace.
|
||||
///
|
||||
/// \param ns The namespace that current expression is in it.
|
||||
virtual void generateIR(serene::Namespace &ns) = 0;
|
||||
};
|
||||
|
||||
|
|
@ -97,7 +102,6 @@ template <typename T, typename... Args>
|
|||
Node make(Args &&...args) {
|
||||
return std::make_shared<T>(std::forward<Args>(args)...);
|
||||
};
|
||||
|
||||
/// Create a new `node` of type `T` and forwards any given parameter
|
||||
/// to the constructor of type `T`. This is the **official way** to create
|
||||
/// a new `Expression`. Here is an example:
|
||||
|
|
|
|||
|
|
@ -28,8 +28,7 @@
|
|||
#include "serene/context.h"
|
||||
#include "serene/exprs/expression.h"
|
||||
|
||||
#include "llvm/ADT/Optional.h"
|
||||
|
||||
#include <llvm/ADT/Optional.h>
|
||||
#include <string>
|
||||
|
||||
namespace serene {
|
||||
|
|
@ -59,21 +58,31 @@ public:
|
|||
size_t count() const;
|
||||
|
||||
Ast from(uint begin);
|
||||
// llvm::MutableArrayRef<Expression> from(uint begin);
|
||||
|
||||
llvm::Optional<Expression *> at(uint index);
|
||||
|
||||
/// Return an iterator to be used with the `for` loop. It's implicitly called
|
||||
/// by the for loop.
|
||||
std::vector<Node>::const_iterator cbegin();
|
||||
|
||||
/// Return an iterator to be used with the `for` loop. It's implicitly called
|
||||
/// by the for loop.
|
||||
std::vector<Node>::const_iterator cend();
|
||||
|
||||
/// Return an iterator to be used with the `for` loop. It's implicitly called
|
||||
/// by the for loop.
|
||||
std::vector<Node>::iterator begin();
|
||||
|
||||
/// Return an iterator to be used with the `for` loop. It's implicitly called
|
||||
/// by the for loop.
|
||||
std::vector<Node>::iterator end();
|
||||
|
||||
MaybeNode analyze(SereneContext &);
|
||||
void generateIR(serene::Namespace &){};
|
||||
|
||||
static bool classof(const Expression *e);
|
||||
|
||||
~List() = default;
|
||||
|
||||
static bool classof(const Expression *e);
|
||||
};
|
||||
|
||||
} // namespace exprs
|
||||
|
|
|
|||
|
|
@ -29,10 +29,9 @@
|
|||
#include "serene/exprs/expression.h"
|
||||
#include "serene/namespace.h"
|
||||
|
||||
#include "llvm/Support/FormatVariadic.h"
|
||||
#include <llvm/Support/FormatVariadic.h>
|
||||
|
||||
namespace serene {
|
||||
|
||||
namespace exprs {
|
||||
|
||||
/// This data structure represent a number. I handles float points, integers,
|
||||
|
|
@ -40,7 +39,8 @@ namespace exprs {
|
|||
/// So it won't cast to actual numeric types and it has a string container
|
||||
/// to hold the parsed value.
|
||||
struct Number : public Expression {
|
||||
// TODO: Use a variant here instead
|
||||
|
||||
// TODO: Use a variant here instead to store different number types
|
||||
std::string value;
|
||||
|
||||
bool isNeg;
|
||||
|
|
@ -52,15 +52,16 @@ struct Number : public Expression {
|
|||
|
||||
ExprType getType() const;
|
||||
std::string toString() const;
|
||||
MaybeNode analyze(SereneContext &ctx);
|
||||
|
||||
static bool classof(const Expression *e);
|
||||
MaybeNode analyze(SereneContext &ctx);
|
||||
void generateIR(serene::Namespace &);
|
||||
|
||||
// TODO: This is horrible, we need to fix it after the mvp
|
||||
int toI64();
|
||||
|
||||
void generateIR(serene::Namespace &);
|
||||
~Number() = default;
|
||||
|
||||
static bool classof(const Expression *e);
|
||||
};
|
||||
|
||||
} // namespace exprs
|
||||
|
|
|
|||
|
|
@ -28,8 +28,7 @@
|
|||
#include "serene/context.h"
|
||||
#include "serene/exprs/expression.h"
|
||||
|
||||
#include "llvm/ADT/StringRef.h"
|
||||
|
||||
#include <llvm/ADT/StringRef.h>
|
||||
#include <string>
|
||||
|
||||
namespace serene {
|
||||
|
|
@ -51,12 +50,12 @@ public:
|
|||
ExprType getType() const;
|
||||
std::string toString() const;
|
||||
|
||||
static bool classof(const Expression *e);
|
||||
|
||||
MaybeNode analyze(SereneContext &);
|
||||
void generateIR(serene::Namespace &){};
|
||||
|
||||
~Symbol() = default;
|
||||
|
||||
static bool classof(const Expression *e);
|
||||
};
|
||||
|
||||
} // namespace exprs
|
||||
|
|
|
|||
|
|
@ -31,11 +31,10 @@
|
|||
#include "serene/exprs/fn.h"
|
||||
#include "serene/exprs/symbol.h"
|
||||
|
||||
#include "llvm/Support/Casting.h"
|
||||
#include "llvm/Support/ErrorHandling.h"
|
||||
#include "llvm/Support/FormatVariadic.h"
|
||||
|
||||
#include <iterator>
|
||||
#include <llvm/Support/Casting.h>
|
||||
#include <llvm/Support/ErrorHandling.h>
|
||||
#include <llvm/Support/FormatVariadic.h>
|
||||
|
||||
namespace serene {
|
||||
namespace exprs {
|
||||
|
|
@ -91,20 +90,12 @@ bool List::classof(const Expression *e) {
|
|||
return e->getType() == ExprType::List;
|
||||
};
|
||||
|
||||
/// Return an iterator to be used with the `for` loop. It's implicitly called by
|
||||
/// the for loop.
|
||||
std::vector<Node>::const_iterator List::cbegin() { return elements.begin(); }
|
||||
|
||||
/// Return an iterator to be used with the `for` loop. It's implicitly called by
|
||||
/// the for loop.
|
||||
std::vector<Node>::const_iterator List::cend() { return elements.end(); }
|
||||
|
||||
/// Return an iterator to be used with the `for` loop. It's implicitly called by
|
||||
/// the for loop.
|
||||
std::vector<Node>::iterator List::begin() { return elements.begin(); }
|
||||
|
||||
/// Return an iterator to be used with the `for` loop. It's implicitly called by
|
||||
/// the for loop.
|
||||
std::vector<Node>::iterator List::end() { return elements.end(); }
|
||||
|
||||
size_t List::count() const { return elements.size(); }
|
||||
|
|
@ -118,7 +109,6 @@ llvm::Optional<Expression *> List::at(uint index) {
|
|||
}
|
||||
|
||||
Ast List::from(uint index) {
|
||||
|
||||
if (index < elements.size()) {
|
||||
return Ast(elements.begin() + index, elements.end());
|
||||
}
|
||||
|
|
|
|||
|
|
@ -24,7 +24,9 @@
|
|||
|
||||
#include "serene/exprs/symbol.h"
|
||||
|
||||
#include "llvm/Support/FormatVariadic.h"
|
||||
#include "llvm/Support/Casting.h"
|
||||
|
||||
#include <llvm/Support/FormatVariadic.h>
|
||||
|
||||
namespace serene {
|
||||
namespace exprs {
|
||||
|
|
|
|||
Loading…
Reference in New Issue