diff --git a/ast.c b/ast.c
index 80fb9d1..2ae8bf7 100644
--- a/ast.c
+++ b/ast.c
@@ -8,74 +8,74 @@
 
 #define N 1024
 
-ast ast_parse(const char* source, const uint32_t len, int* err)
+ast astParse(const char* source, const uint32_t len)
 {
     uint32_t estimated_token_count = len / 8;
 
-    tokenizerTag* token_tags = NULL;
-    astIndex* token_starts = NULL;
-    astNodeTag* nodes_tags = NULL;
-    astTokenIndex* main_tokens = NULL;
-    astData* nodes_datas = NULL;
-    astNodeIndex* extra_data_arr = NULL;
-    astNodeIndex* scratch_arr = NULL;
+    TokenizerTag* token_tags = NULL;
+    AstIndex* token_starts = NULL;
+    AstNodeTag* nodes_tags = NULL;
+    AstTokenIndex* main_tokens = NULL;
+    AstData* nodes_datas = NULL;
+    AstNodeIndex* extra_data_arr = NULL;
+    AstNodeIndex* scratch_arr = NULL;
 
-    if (!(token_tags = calloc(estimated_token_count, sizeof(tokenizerTag))))
-        goto err;
+    if (!(token_tags = calloc(estimated_token_count, sizeof(TokenizerTag))))
+        exit(1);
 
-    if (!(token_starts = calloc(estimated_token_count, sizeof(astIndex))))
-        goto err;
+    if (!(token_starts = calloc(estimated_token_count, sizeof(AstIndex))))
+        exit(1);
 
-    tokenizer tok = tokenizer_init(source, len);
+    Tokenizer tok = tokenizerInit(source, len);
     uint32_t tokens_len = 0;
     for (; tokens_len <= estimated_token_count; tokens_len++) {
         if (tokens_len == estimated_token_count) {
             fprintf(stderr, "too many tokens, bump estimated_token_count\n");
-            goto err;
+            exit(1);
         }
-        tokenizerToken token = tokenizer_next(&tok);
+        TokenizerToken token = tokenizerNext(&tok);
         token_tags[tokens_len] = token.tag;
         token_starts[tokens_len] = token.loc.start;
     }
 
     uint32_t estimated_node_count = (tokens_len + 2) / 2;
 
-    if (!(nodes_tags = calloc(estimated_node_count, sizeof(astNodeTag))))
-        goto err;
+    if (!(nodes_tags = calloc(estimated_node_count, sizeof(AstNodeTag))))
+        exit(1);
 
-    if (!(main_tokens = calloc(estimated_node_count, sizeof(astTokenIndex))))
-        goto err;
+    if (!(main_tokens = calloc(estimated_node_count, sizeof(AstTokenIndex))))
+        exit(1);
 
-    if (!(nodes_datas = calloc(estimated_node_count, sizeof(astData))))
-        goto err;
+    if (!(nodes_datas = calloc(estimated_node_count, sizeof(AstData))))
+        exit(1);
 
-    if (!(extra_data_arr = calloc(N, sizeof(astNodeIndex))))
-        goto err;
+    if (!(extra_data_arr = calloc(N, sizeof(AstNodeIndex))))
+        exit(1);
 
-    if (!(scratch_arr = calloc(N, sizeof(astNodeIndex))))
-        goto err;
+    if (!(scratch_arr = calloc(N, sizeof(AstNodeIndex))))
+        exit(1);
 
-    parser p = (parser) {
+    Parser p = (Parser) {
         .source = source,
         .source_len = len,
         .token_tags = token_tags,
         .token_starts = token_starts,
         .tokens_len = tokens_len,
         .tok_i = 0,
-        .nodes = (astNodeList) {
+        .nodes = (AstNodeList) {
             .len = 0,
             .cap = estimated_node_count,
             .tags = nodes_tags,
             .main_tokens = main_tokens,
             .datas = nodes_datas,
         },
-        .extra_data = (parserNodeIndexSlice) { .len = 0, .cap = N, .arr = extra_data_arr },
-        .scratch = (parserNodeIndexSlice) { .len = 0, .cap = N, .arr = scratch_arr },
+        .extra_data = (ParserNodeIndexSlice) { .len = 0, .cap = N, .arr = extra_data_arr },
+        .scratch = (ParserNodeIndexSlice) { .len = 0, .cap = N, .arr = scratch_arr },
     };
 
     free(scratch_arr);
 
-    parse_root(&p);
+    parseRoot(&p);
 
     return (ast) {
         .source = source,
@@ -85,16 +85,4 @@ ast ast_parse(const char* source, const uint32_t len, int* err)
         .extra_data = p.extra_data.arr,
         .extra_data_len = p.extra_data.len,
     };
-
-err:
-    free(token_tags);
-    free(token_starts);
-    free(nodes_tags);
-    free(main_tokens);
-    free(nodes_datas);
-    free(extra_data_arr);
-    free(scratch_arr);
-
-    *err = 1;
-    return (ast) {};
 }
diff --git a/ast.h b/ast.h
index 7b96778..ec9d16f 100644
--- a/ast.h
+++ b/ast.h
@@ -479,23 +479,23 @@ typedef enum {
     AST_NODE_TAG_ERROR_VALUE,
     /// `lhs!rhs`. main_token is the `!`.
     AST_NODE_TAG_ERROR_UNION,
-} astNodeTag;
+} AstNodeTag;
 
-typedef int32_t astTokenIndex;
-typedef uint32_t astNodeIndex;
-typedef uint32_t astIndex;
+typedef int32_t AstTokenIndex;
+typedef uint32_t AstNodeIndex;
+typedef uint32_t AstIndex;
 
 typedef struct {
-    astIndex lhs, rhs;
-} astData;
+    AstIndex lhs, rhs;
+} AstData;
 
 typedef struct {
     uint32_t len;
     uint32_t cap;
-    astNodeTag* tags;
-    astTokenIndex* main_tokens;
-    astData* datas;
-} astNodeList;
+    AstNodeTag* tags;
+    AstTokenIndex* main_tokens;
+    AstData* datas;
+} AstNodeList;
 
 typedef struct {
     const char* source;
@@ -503,16 +503,16 @@ typedef struct {
 
     struct {
         uint32_t len;
-        tokenizerTag* tags;
-        astIndex* starts;
+        TokenizerTag* tags;
+        AstIndex* starts;
     } tokens;
 
-    astNodeList nodes;
+    AstNodeList nodes;
 
-    astNodeIndex* extra_data;
+    AstNodeIndex* extra_data;
     uint32_t extra_data_len;
 } ast;
 
-ast ast_parse(const char* source, uint32_t len, int* err);
+ast astParse(const char* source, uint32_t len);
 
 #endif
diff --git a/build.zig b/build.zig
index 3f23427..df07f7b 100644
--- a/build.zig
+++ b/build.zig
@@ -96,6 +96,7 @@ pub fn build(b: *std.Build) !void {
     cppcheck.addArgs(&.{
         "--quiet",
         "--error-exitcode=1",
+        "--check-level=exhaustive",
         "--enable=all",
         "--suppress=missingIncludeSystem",
         "--suppress=checkersReport",
diff --git a/main.c b/main.c
index 5c933f5..329308b 100644
--- a/main.c
+++ b/main.c
@@ -2,8 +2,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-int zig1_run(char* program, char** msg);
-int zig1_run_file(char* fname, char** msg);
+int zig1Run(char* program, char** msg);
+int zig1RunFile(char* fname, char** msg);
 
 static void usage(const char* argv0)
 {
@@ -18,7 +18,7 @@ int main(int argc, char** argv)
     }
 
     char* msg;
-    switch (zig1_run_file(argv[1], &msg)) {
+    switch (zig1RunFile(argv[1], &msg)) {
     case 0:
         return 0;
         break;
diff --git a/parser.c b/parser.c
index aef725d..02f98e2 100644
--- a/parser.c
+++ b/parser.c
@@ -1,12 +1,13 @@
 #include <stdio.h>
+#include <stdlib.h>
 
 #include "parser.h"
 
 typedef struct {
     uint32_t len;
-    astNodeIndex lhs, rhs;
+    AstNodeIndex lhs, rhs;
     bool trailing;
-} members;
+} Members;
 
 typedef struct {
     enum {
@@ -17,24 +18,31 @@ typedef struct {
     union {
         uint32_t end;
     } payload;
-} field_state;
+} FieldState;
 
-static astTokenIndex next_token(parser* p)
+int parseRoot(Parser* p)
 {
-    return ++p->tok_i;
+    p->nodes.tags[p->nodes.len++] = AST_NODE_TAG_ROOT;
+    p->nodes.main_tokens[p->nodes.len] = 0;
+
+    // members root_members = parseContainerMembers(p);
+
+    return 0;
 }
 
-static astTokenIndex eat_token(parser* p, tokenizerTag tag)
+static AstTokenIndex nextToken(Parser* p) { return p->tok_i++; }
+
+static AstTokenIndex eatToken(Parser* p, TokenizerTag tag)
 {
-    return (p->token_tags[p->tok_i] == tag) ? next_token(p) : -1;
+    return (p->token_tags[p->tok_i] == tag) ? nextToken(p) : -1;
 }
 
-static members parse_container_members(parser* p)
+static Members parseContainerMembers(Parser* p)
 {
     const uint32_t scratch_top = p->scratch.len;
-    members res = (members) {};
+    Members res = (Members) {};
     // ast_token_index last_field;
-    while (eat_token(p, TOKENIZER_TAG_CONTAINER_DOC_COMMENT) != -1)
+    while (eatToken(p, TOKENIZER_TAG_CONTAINER_DOC_COMMENT) != -1)
         ;
 
     // bool trailing = false;
@@ -166,25 +174,15 @@ static members parse_container_members(parser* p)
         case TOKENIZER_TAG_KEYWORD_WHILE:;
             const char* str = tokenizerTagString[p->token_tags[p->tok_i]];
             fprintf(stderr, "keyword %s not implemented\n", str);
-            goto cleanup;
+            exit(1);
         case TOKENIZER_TAG_KEYWORD_PUB:
             p->tok_i++;
+            // AstNodeIndex top_level_decl = expectTopLevelDecl(*p);
             break;
             // TODO do work
         }
     }
 
-cleanup:
     p->scratch.len = scratch_top;
     return res;
 }
-
-int parse_root(parser* p)
-{
-    p->nodes.tags[p->nodes.len++] = AST_NODE_TAG_ROOT;
-    p->nodes.main_tokens[p->nodes.len] = 0;
-
-    // members root_members = parse_container_members(p);
-
-    return 0;
-}
diff --git a/parser.h b/parser.h
index 9532bf6..577b0b1 100644
--- a/parser.h
+++ b/parser.h
@@ -9,24 +9,24 @@
 typedef struct {
     uint32_t len;
     uint32_t cap;
-    astNodeIndex* arr;
-} parserNodeIndexSlice;
+    AstNodeIndex* arr;
+} ParserNodeIndexSlice;
 
 typedef struct {
     const char* source;
     const uint32_t source_len;
 
-    tokenizerTag* token_tags;
-    astIndex* token_starts;
+    TokenizerTag* token_tags;
+    AstIndex* token_starts;
     uint32_t tokens_len;
 
-    astTokenIndex tok_i;
+    AstTokenIndex tok_i;
 
-    astNodeList nodes;
-    parserNodeIndexSlice extra_data;
-    parserNodeIndexSlice scratch;
-} parser;
+    AstNodeList nodes;
+    ParserNodeIndexSlice extra_data;
+    ParserNodeIndexSlice scratch;
+} Parser;
 
-int parse_root(parser*);
+int parseRoot(Parser*);
 
 #endif
diff --git a/tokenizer.c b/tokenizer.c
index 9852e53..0f9d7f3 100644
--- a/tokenizer.c
+++ b/tokenizer.c
@@ -7,10 +7,10 @@
 
 typedef struct {
     const char* keyword;
-    tokenizerTag tag;
-} keywordMap;
+    TokenizerTag tag;
+} KeywordMap;
 
-const keywordMap keywords[] = {
+const KeywordMap keywords[] = {
     { "addrspace", TOKENIZER_TAG_KEYWORD_ADDRSPACE },
     { "align", TOKENIZER_TAG_KEYWORD_ALIGN },
     { "allowzero", TOKENIZER_TAG_KEYWORD_ALLOWZERO },
@@ -63,9 +63,9 @@ const keywordMap keywords[] = {
 };
 
 // TODO binary search
-static tokenizerTag get_keyword(const char* bytes, const uint32_t len)
+static TokenizerTag getKeyword(const char* bytes, const uint32_t len)
 {
-    for (unsigned long i = 0; i < sizeof(keywords) / sizeof(keywordMap); i++) {
+    for (unsigned long i = 0; i < sizeof(keywords) / sizeof(KeywordMap); i++) {
         size_t klen = strlen(keywords[i].keyword);
         size_t minlen = klen < len ? klen : len;
         int cmp = strncmp(bytes, keywords[i].keyword, minlen);
@@ -82,25 +82,25 @@ static tokenizerTag get_keyword(const char* bytes, const uint32_t len)
     return TOKENIZER_TAG_INVALID;
 }
 
-tokenizer tokenizer_init(const char* buffer, const uint32_t len)
+Tokenizer tokenizerInit(const char* buffer, const uint32_t len)
 {
-    return (tokenizer) {
+    return (Tokenizer) {
         .buffer = buffer,
         .buffer_len = len,
         .index = (len >= 3 && memcmp(buffer, "\xEF\xBB\xBF", 3) == 0) ? 3 : 0,
     };
 }
 
-tokenizerToken tokenizer_next(tokenizer* self)
+TokenizerToken tokenizerNext(Tokenizer* self)
 {
-    tokenizerToken result = (tokenizerToken) {
+    TokenizerToken result = (TokenizerToken) {
         .tag = TOKENIZER_TAG_INVALID,
         .loc = {
             .start = 0,
         },
     };
 
-    tokenizerState state = TOKENIZER_STATE_START;
+    TokenizerState state = TOKENIZER_STATE_START;
 
 state:
     switch (state) {
@@ -108,7 +108,7 @@ state:
         switch (self->buffer[self->index]) {
         case 0:
             if (self->index == self->buffer_len) {
-                return (tokenizerToken) {
+                return (TokenizerToken) {
                     .tag = TOKENIZER_TAG_EOF,
                     .loc = {
                         .start = self->index,
@@ -455,7 +455,7 @@ state:
         default:; // Once we're at C23, this semicolon can be removed.
             const char* start = self->buffer + result.loc.start;
             uint32_t len = self->index - result.loc.start;
-            tokenizerTag tag = get_keyword(start, len);
+            TokenizerTag tag = getKeyword(start, len);
             if (tag != TOKENIZER_TAG_INVALID) {
                 result.tag = tag;
             }
@@ -856,7 +856,7 @@ state:
                 state = TOKENIZER_STATE_INVALID;
                 goto state;
             } else {
-                return (tokenizerToken) {
+                return (TokenizerToken) {
                     .tag = TOKENIZER_TAG_EOF,
                     .loc = {
                         .start = self->index,
@@ -930,7 +930,7 @@ state:
                 state = TOKENIZER_STATE_INVALID;
                 goto state;
             } else {
-                return (tokenizerToken) {
+                return (TokenizerToken) {
                     .tag = TOKENIZER_TAG_EOF,
                     .loc = {
                         .start = self->index,
diff --git a/tokenizer.h b/tokenizer.h
index 2b04e30..b9b108b 100644
--- a/tokenizer.h
+++ b/tokenizer.h
@@ -133,7 +133,7 @@
 
 typedef enum {
     FOREACH_TOKENIZER_TAG_ENUM(GENERATE_ENUM)
-} tokenizerTag;
+} TokenizerTag;
 
 static const char *tokenizerTagString[] = {
     FOREACH_TOKENIZER_TAG_ENUM(GENERATE_STRING)
@@ -185,22 +185,22 @@ typedef enum {
     TOKENIZER_STATE_PERIOD_ASTERISK,
     TOKENIZER_STATE_SAW_AT_SIGN,
     TOKENIZER_STATE_INVALID,
-} tokenizerState;
+} TokenizerState;
 
 typedef struct {
-    tokenizerTag tag;
+    TokenizerTag tag;
     struct {
         uint32_t start, end;
     } loc;
-} tokenizerToken;
+} TokenizerToken;
 
 typedef struct {
     const char* buffer;
     const uint32_t buffer_len;
     uint32_t index;
-} tokenizer;
+} Tokenizer;
 
-tokenizer tokenizer_init(const char* buffer, uint32_t len);
-tokenizerToken tokenizer_next(tokenizer* self);
+Tokenizer tokenizerInit(const char* buffer, uint32_t len);
+TokenizerToken tokenizerNext(Tokenizer* self);
 
 #endif
diff --git a/tokenizer_test.zig b/tokenizer_test.zig
index e36920a..f571ce0 100644
--- a/tokenizer_test.zig
+++ b/tokenizer_test.zig
@@ -138,6 +138,15 @@ fn zigToken(token: c_uint) Token.Tag {
 
 // Copy-pasted from lib/std/zig/tokenizer.zig
 fn testTokenize(source: [:0]const u8, expected_token_tags: []const Token.Tag) !void {
+    // Do the C thing
+    var ctokenizer = c.tokenizerInit(source.ptr, @intCast(source.len));
+    for (expected_token_tags) |expected_token_tag| {
+        const token = c.tokenizerNext(&ctokenizer);
+        try std.testing.expectEqual(expected_token_tag, zigToken(token.tag));
+    }
+    const last_token = c.tokenizerNext(&ctokenizer);
+    try std.testing.expectEqual(Token.Tag.eof, zigToken(last_token.tag));
+
     // uncomment when Zig source and compiler get in sync (e.g. with 0.14)
     //var tokenizer = Tokenizer.init(source);
     //for (expected_token_tags) |expected_token_tag| {
@@ -149,17 +158,6 @@ fn testTokenize(source: [:0]const u8, expected_token_tags: []const Token.Tag) !v
     //// recovered by opinionated means outside the scope of this implementation.
     //const last_token = tokenizer.next();
     //try std.testing.expectEqual(Token.Tag.eof, last_token.tag);
-    //try std.testing.expectEqual(source.len, last_token.loc.start);
-    //try std.testing.expectEqual(source.len, last_token.loc.end);
-
-    // Do the C thing
-    var ctokenizer = c.tokenizer_init(source.ptr, @intCast(source.len));
-    for (expected_token_tags) |expected_token_tag| {
-        const token = c.tokenizer_next(&ctokenizer);
-        try std.testing.expectEqual(expected_token_tag, zigToken(token.tag));
-    }
-    const last_token = c.tokenizer_next(&ctokenizer);
-    try std.testing.expectEqual(Token.Tag.eof, zigToken(last_token.tag));
     try std.testing.expectEqual(source.len, last_token.loc.start);
     try std.testing.expectEqual(source.len, last_token.loc.end);
 }
diff --git a/zig1.c b/zig1.c
index 93ba67f..1557145 100644
--- a/zig1.c
+++ b/zig1.c
@@ -6,7 +6,7 @@
 // - code = 0: program successfully terminated.
 // - code = 1: panicked, panic message in msg. Caller should free msg.
 // - code = 2: interpreter error, error in msg. Caller should free msg.
-int zig1_run(const char* program, char** msg)
+int zig1Run(const char* program, char** msg)
 {
     (void)program;
     (void)msg;
@@ -15,7 +15,7 @@ int zig1_run(const char* program, char** msg)
 
 // API: run and:
 // code = 3: abnormal error, expect something in stderr.
-int zig1_run_file(const char* fname, char** msg)
+int zig1RunFile(const char* fname, char** msg)
 {
     FILE* f = fopen(fname, "r");
     if (f == NULL) {
@@ -53,7 +53,7 @@ int zig1_run_file(const char* fname, char** msg)
     fclose(f);
     program[fsize] = 0;
 
-    int code = zig1_run(program, msg);
+    int code = zig1Run(program, msg);
     free(program);
     return code;
 }