init

.clang-format

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+Language: Cpp
+BasedOnStyle: WebKit
+IndentWidth: 4
+ColumnLimit: 80
+IndentCaseLabels: true
+

.gitignore

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+
+*.o
+semos
+

Makefile

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+
+OUTPUT = semos
+
+CFLAGS = -std=c17 -Wall -Wextra -Wpedantic -Wconversion -pedantic -pedantic-errors
+
+CFILES = \
+	main.c \
+
+OBJECT_FILES = $(patsubst %.c,%.o,$(CFILES))
+
+HEADER_FILES = $(wildcard *.h)
+
+$(OUTPUT): $(OBJECT_FILES)
+	gcc -o $@ $^
+
+%.o: %.c $(HEADER_FILES)
+	gcc -c -o $@ $(CFLAGS) $<
+
+.PHONY: clean
+
+clean:
+	rm -rf *.o $(OUTPUT)
+

compile_flags.txt

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+-xc
+-std=c17
+-Wall
+-Wextra
+-Wpedantic
+-Wconversion
+-pedantic
+-pedantic-errors
+

main.c

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+#include <stdio.h>
+
+int main(void) { printf("hello world\n"); }

parser.h

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+#ifndef PARSER_H
+#define PARSER_H
+
+#include <stddef.h>
+
+typedef enum {
+    TokenType_Error,
+    TokenType_Id,
+    TokenType_Int,
+    TokenType_Not,
+    TokenType_And,
+    TokenType_Or,
+    TokenType_Loop,
+    TokenType_Fn,
+    TokenType_Break,
+    TokenType_LParen,
+    TokenType_RParen,
+    TokenType_LBrace,
+    TokenType_RBrace,
+    TokenType_LBracket,
+    TokenType_RBracket,
+    TokenType_Comma,
+    TokenType_Semicolon,
+    TokenType_Exclamation,
+    TokenType_Plus,
+    TokenType_Minus,
+    TokenType_Asterisk,
+    TokenType_EE,
+    TokenType_NE,
+    TokenType_LT,
+    TokenType_GT,
+    TokenType_LTE,
+    TokenType_GTE,
+} TokenType;
+
+typedef struct {
+    TokenType token;
+    size_t index;
+    size_t length;
+    int line;
+} Token;
+
+typedef enum {
+    ASTNodeType_Error,
+    ASTNodeType_Id,
+    ASTNodeType_Int,
+    ASTNodeType_Block,
+    ASTNodeType_If,
+    ASTNodeType_Loop,
+    ASTNodeType_Call,
+    ASTNodeType_Index,
+    ASTNodeType_Unary,
+    ASTNodeType_Binary,
+    ASTNodeType_Assign,
+    ASTNodeType_Let,
+    ASTNodeType_Break,
+    ASTNodeType_Fn,
+} ASTNodeType;
+
+typedef struct ASTNode ASTNode;
+
+typedef struct {
+    ASTNode** data;
+    size_t length;
+    size_t capacity;
+} ASTNodeVec;
+
+void ast_node_vec_construct(ASTNodeVec* vec);
+void ast_node_vec_destroy(ASTNodeVec* vec);
+void ast_node_vec_push(ASTNodeVec* vec, ASTNode* item);
+
+typedef struct {
+    ASTNode* condition;
+    ASTNode* truthy;
+    ASTNode* falsy;
+} ASTIfNode;
+
+typedef struct {
+    ASTNode* body;
+} ASTLoopNode;
+
+typedef struct {
+    ASTNode* subject;
+    ASTNodeVec args;
+} ASTCallNode;
+
+typedef struct {
+    ASTNode* subject;
+    ASTNode* value;
+} ASTIndexNode;
+
+typedef enum {
+    UnaryType_Not,
+    UnaryType_Negate,
+} UnaryType;
+
+typedef struct {
+    UnaryType unary_type;
+    ASTNode* subject;
+} ASTUnaryNode;
+
+typedef enum {
+    BinaryType_And,
+    BinaryType_Or,
+    BinaryType_Add,
+    BinaryType_Subtract,
+    BinaryType_Multiply,
+    BinaryType_EE,
+    BinaryType_NE,
+    BinaryType_LT,
+    BinaryType_GT,
+    BinaryType_LTE,
+    BinaryType_GTE,
+} BinaryType;
+
+typedef struct {
+    BinaryType binary_type;
+    ASTNode* left;
+    ASTNode* right;
+} ASTBinaryNode;
+
+typedef enum {
+    AssignType_Assign,
+    AssignType_Add,
+    AssignType_Subtract,
+    AssignType_Multiply,
+} AssignType;
+
+typedef struct {
+    AssignType assign_type;
+    ASTNode* subject;
+    ASTNode* value;
+} ASTAssignNode;
+
+typedef struct {
+    char* id;
+    ASTNode* value;
+} ASTLetNode;
+
+typedef struct {
+    char* id;
+    ASTNodeVec params;
+    ASTNode* body;
+} ASTFnNode;
+
+struct ASTNode {
+    ASTNodeType node_type;
+    int line;
+    union {
+        char* id_value;
+        int int_value;
+        ASTNodeVec statements;
+        ASTIfNode if_node;
+        ASTLoopNode loop_node;
+        ASTCallNode call_node;
+        ASTIndexNode index_node;
+        ASTUnaryNode unary_node;
+        ASTBinaryNode binary_node;
+        ASTAssignNode assign_node;
+        ASTLetNode let_node;
+        ASTFnNode fn_node;
+    };
+};
+
+void ast_node_destroy(ASTNode* node);
+
+#endif