mirror of
https://github.com/italicsjenga/valence.git
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Add block state generator
This commit is contained in:
parent
5bbbb258d1
commit
a997820b7a
14
Cargo.toml
14
Cargo.toml
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@ -5,9 +5,7 @@ edition = "2021"
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description = "A framework for building Minecraft servers in Rust."
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repository = "https://github.com/rj00a/valence"
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license = "MIT"
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[workspace]
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members = ["valence-data"]
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build = "build/main.rs"
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[dependencies]
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aes = "0.7"
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@ -47,4 +45,12 @@ default-features = false
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features = ["rustls-tls", "json"]
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[dev-dependencies]
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env_logger = "0.9"
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env_logger = "0.9"
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[build-dependencies]
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anyhow = "1"
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heck = "0.4"
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proc-macro2 = "1"
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quote = "1"
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serde = {version = "1", features = ["derive"]}
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serde_json = "1"
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584
build/block.rs
Normal file
584
build/block.rs
Normal file
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@ -0,0 +1,584 @@
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// TODO: can't match on str in const fn.
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use std::collections::BTreeSet;
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use std::path::Path;
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use std::process::Command;
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use std::{env, fs};
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use anyhow::Context;
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use heck::{ToPascalCase, ToShoutySnakeCase};
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use proc_macro2::TokenStream;
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use quote::quote;
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use serde::Deserialize;
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use crate::ident;
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pub fn build() -> anyhow::Result<()> {
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let blocks = parse_blocks_json()?;
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let max_block_state = blocks.iter().map(|b| b.max_state_id).max().unwrap();
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let state_to_type = blocks
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.iter()
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.map(|b| {
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let min = b.min_state_id;
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let max = b.max_state_id;
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let name = ident(b.name.to_pascal_case());
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quote! {
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#min..=#max => BlockType::#name,
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}
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})
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.collect::<TokenStream>();
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let get_arms = blocks
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.iter()
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.filter(|&b| !b.props.is_empty())
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.map(|b| {
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let block_type_name = ident(b.name.to_pascal_case());
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let arms = b
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.props
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.iter()
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.map(|p| {
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let prop_name = ident(p.name.to_pascal_case());
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let min_state_id = b.min_state_id;
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let product: u16 = b
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.props
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.iter()
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.take_while(|&other| p.name != other.name)
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.map(|p| p.vals.len() as u16)
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.product();
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let num_values = p.vals.len() as u16;
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let arms = p.vals.iter().enumerate().map(|(i, v)| {
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let value_idx = i as u16;
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let value_name = ident(v.to_pascal_case());
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quote! {
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#value_idx => Some(PropValue::#value_name),
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}
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}).collect::<TokenStream>();
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quote! {
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PropName::#prop_name => match (self.0 - #min_state_id) / #product % #num_values {
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#arms
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_ => unreachable!(),
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},
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}
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})
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.collect::<TokenStream>();
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quote! {
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BlockType::#block_type_name => match name {
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#arms
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_ => None,
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},
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}
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})
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.collect::<TokenStream>();
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let set_arms = blocks
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.iter()
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.filter(|&b| !b.props.is_empty())
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.map(|b| {
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let block_type_name = ident(b.name.to_pascal_case());
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let arms = b
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.props
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.iter()
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.map(|p| {
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let prop_name = ident(p.name.to_pascal_case());
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let min_state_id = b.min_state_id;
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let product: u16 = b
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.props
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.iter()
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.take_while(|&other| p.name != other.name)
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.map(|p| p.vals.len() as u16)
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.product();
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let num_values = p.vals.len() as u16;
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let arms = p
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.vals
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.iter()
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.enumerate()
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.map(|(i, v)| {
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let val_idx = i as u16;
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let val_name = ident(v.to_pascal_case());
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quote! {
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PropValue::#val_name =>
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Self(self.0 - (self.0 - #min_state_id) / #product % #num_values * #product
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+ #val_idx * #product),
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}
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})
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.collect::<TokenStream>();
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quote! {
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PropName::#prop_name => match val {
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#arms
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_ => self,
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},
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}
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})
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.collect::<TokenStream>();
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quote! {
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BlockType::#block_type_name => match name {
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#arms
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_ => self,
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},
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}
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})
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.collect::<TokenStream>();
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let default_block_states = blocks
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.iter()
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.map(|b| {
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let name = ident(b.name.to_shouty_snake_case());
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let state = b.default_state;
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let doc = format!("The default block state for `{}`.", b.name);
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quote! {
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#[doc = #doc]
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pub const #name: BlockState = BlockState(#state);
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}
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})
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.collect::<TokenStream>();
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let type_to_state = blocks
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.iter()
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.map(|b| {
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let typ = ident(b.name.to_pascal_case());
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let state = ident(b.name.to_shouty_snake_case());
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quote! {
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BlockType::#typ => BlockState::#state,
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}
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})
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.collect::<TokenStream>();
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let block_type_variants = blocks
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.iter()
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.map(|b| ident(b.name.to_pascal_case()))
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.collect::<Vec<_>>();
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let block_type_from_str_arms = blocks
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.iter()
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.map(|b| {
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let name = &b.name;
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let name_ident = ident(name.to_pascal_case());
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quote! {
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#name => Some(BlockType::#name_ident),
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}
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})
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.collect::<TokenStream>();
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let block_type_to_str_arms = blocks
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.iter()
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.map(|b| {
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let name = &b.name;
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let name_ident = ident(name.to_pascal_case());
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quote! {
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BlockType::#name_ident => #name,
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}
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})
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.collect::<TokenStream>();
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let block_type_props_arms = blocks
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.iter()
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.filter(|&b| !b.props.is_empty())
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.map(|b| {
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let name = ident(b.name.to_pascal_case());
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let prop_names = b.props.iter().map(|p| ident(p.name.to_pascal_case()));
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quote! {
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Self::#name => &[#(PropName::#prop_names,)*],
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}
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})
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.collect::<TokenStream>();
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let num_block_types = blocks.len();
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let prop_names = blocks
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.iter()
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.flat_map(|b| b.props.iter().map(|p| &p.name))
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.collect::<BTreeSet<_>>();
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let prop_name_variants = prop_names
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.iter()
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.map(|&name| ident(name.to_pascal_case()))
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.collect::<Vec<_>>();
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let prop_name_from_str_arms = prop_names
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.iter()
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.map(|&name| {
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let ident = ident(name.to_pascal_case());
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quote! {
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#name => Some(PropName::#ident),
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}
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})
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.collect::<TokenStream>();
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let prop_name_to_str_arms = prop_names
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.iter()
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.map(|&name| {
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let ident = ident(name.to_pascal_case());
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quote! {
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PropName::#ident => #name,
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}
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})
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.collect::<TokenStream>();
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let num_prop_names = prop_names.len();
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let prop_values = blocks
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.iter()
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.flat_map(|b| b.props.iter().flat_map(|p| &p.vals))
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.collect::<BTreeSet<_>>();
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let prop_value_variants = prop_values
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.iter()
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.map(|val| ident(val.to_pascal_case()))
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.collect::<Vec<_>>();
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let prop_value_from_str_arms = prop_values
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.iter()
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.map(|val| {
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let ident = ident(val.to_pascal_case());
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quote! {
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#val => Some(PropValue::#ident),
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}
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})
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.collect::<TokenStream>();
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let prop_value_to_str_arms = prop_values
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.iter()
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.map(|val| {
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let ident = ident(val.to_pascal_case());
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quote! {
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PropValue::#ident => #val,
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}
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})
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.collect::<TokenStream>();
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let prop_value_from_u16_arms = prop_values
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.iter()
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.filter_map(|v| v.parse::<u16>().ok())
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.map(|n| {
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let ident = ident(n.to_string());
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quote! {
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#n => Some(PropValue::#ident),
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}
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})
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.collect::<TokenStream>();
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let prop_value_to_u16_arms = prop_values
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.iter()
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.filter_map(|v| v.parse::<u16>().ok())
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.map(|n| {
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let ident = ident(n.to_string());
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quote! {
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PropValue::#ident => Some(#n),
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}
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})
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.collect::<TokenStream>();
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let num_property_names = prop_values.len();
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let finshed = quote! {
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/// Represents the state of a block, not including block entity data such as
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/// the text on a sign, the design on a banner, or the content of a spawner.
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#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Default, Hash, Debug)]
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pub struct BlockState(u16);
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impl BlockState {
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/// Returns the default block state for a given block type.
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pub const fn from_type(typ: BlockType) -> Self {
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match typ {
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#type_to_state
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}
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}
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/// Returns the [`BlockType`] of this block state.
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pub const fn to_type(self) -> BlockType {
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match self.0 {
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#state_to_type
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_ => unreachable!(),
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}
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}
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/// Constructs a block state from a raw block state ID.
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///
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/// If the given ID is invalid, `None` is returned.
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pub const fn from_raw(id: u16) -> Option<Self> {
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if id <= #max_block_state {
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Some(Self(id))
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} else {
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None
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}
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}
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/// Converts this block state to its underlying raw block state ID.
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///
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/// The original block state can be recovered with [`BlockState::from_raw`].
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pub const fn to_raw(self) -> u16 {
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self.0
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}
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/// Gets the value of the property with the given name from this block.
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///
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/// If this block does not have the property, then `None` is returned.
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pub const fn get(self, name: PropName) -> Option<PropValue> {
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match self.to_type() {
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#get_arms
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_ => None
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}
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}
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/// Sets the value of a propery on this block, returning the modified block.
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///
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/// If this block does not have the given property or the property value is invalid,
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/// then the orginal block is returned unchanged.
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#[must_use]
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pub const fn set(self, name: PropName, val: PropValue) -> Self {
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match self.to_type() {
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#set_arms
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_ => self,
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}
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}
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#default_block_states
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}
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/// An enumeration of all block types.
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#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
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pub enum BlockType {
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#(#block_type_variants,)*
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}
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impl BlockType {
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/// Construct a block type from its snake_case name.
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///
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/// Returns `None` if the given name is not valid.
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pub fn from_str(name: &str) -> Option<BlockType> {
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match name {
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#block_type_from_str_arms
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_ => None
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}
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}
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/// Get the snake_case name of this block type.
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pub const fn to_str(self) -> &'static str {
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match self {
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#block_type_to_str_arms
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}
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}
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/// Returns the default block state for a given block type.
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pub const fn to_state(self) -> BlockState {
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BlockState::from_type(self)
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}
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/// Returns a slice of all properties this block type has.
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pub const fn props(self) -> &'static [PropName] {
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match self {
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#block_type_props_arms
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_ => &[],
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}
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}
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/// An array of all block types.
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pub const ALL: [Self; #num_block_types] = [#(Self::#block_type_variants,)*];
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}
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/// The default block type is `air`.
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impl Default for BlockType {
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fn default() -> Self {
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Self::Air
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}
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}
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/// Contains all possible block state property names.
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///
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/// For example, `waterlogged`, `facing`, and `half` are all property names.
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#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
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pub enum PropName {
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#(#prop_name_variants,)*
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}
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impl PropName {
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/// Construct a property name from its snake_case name.
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///
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/// Returns `None` if the given name is not valid.
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pub fn from_str(name: &str) -> Option<Self> {
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match name {
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#prop_name_from_str_arms
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_ => None,
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}
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}
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/// Get the snake_case name of this property name.
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pub const fn to_str(self) -> &'static str {
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match self {
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#prop_name_to_str_arms
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}
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}
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/// An array of all property names.
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pub const ALL: [Self; #num_prop_names] = [#(Self::#prop_name_variants,)*];
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}
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/// Contains all possible values that a block property might have.
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///
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/// For example, `upper`, `true`, and `2` are all property values.
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#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
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pub enum PropValue {
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#(#prop_value_variants,)*
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}
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|
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impl PropValue {
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/// Construct a property value from its snake_case name.
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///
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/// Returns `None` if the given name is not valid.
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pub fn from_str(name: &str) -> Option<Self> {
|
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match name {
|
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#prop_value_from_str_arms
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_ => None,
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}
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}
|
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/// Get the snake_case name of this property value.
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pub const fn to_str(self) -> &'static str {
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match self {
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#prop_value_to_str_arms
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}
|
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}
|
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/// Converts a `u16` into a numeric property value.
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/// Returns `None` if the given number does not have a
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/// corresponding property value.
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pub const fn from_u16(n: u16) -> Option<Self> {
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match n {
|
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#prop_value_from_u16_arms
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_ => None,
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}
|
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}
|
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/// Converts this property value into a `u16` if it is numeric.
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/// Returns `None` otherwise.
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pub const fn to_u16(self) -> Option<u16> {
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match self {
|
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#prop_value_to_u16_arms
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_ => None,
|
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}
|
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}
|
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|
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pub const fn from_bool(b: bool) -> Self {
|
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if b {
|
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Self::True
|
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} else {
|
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Self::False
|
||||
}
|
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}
|
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|
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pub const fn to_bool(self) -> Option<bool> {
|
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match self {
|
||||
Self::True => Some(true),
|
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Self::False => Some(false),
|
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_ => None,
|
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}
|
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}
|
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|
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/// An array of all property values.
|
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pub const ALL: [Self; #num_property_names] = [#(Self::#prop_value_variants,)*];
|
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}
|
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|
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impl From<bool> for PropValue {
|
||||
fn from(b: bool) -> Self {
|
||||
Self::from_bool(b)
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
let out_path =
|
||||
Path::new(&env::var_os("OUT_DIR").context("can't get OUT_DIR env var")?).join("block.rs");
|
||||
|
||||
fs::write(&out_path, &finshed.to_string())?;
|
||||
|
||||
// Format the output for debugging purposes.
|
||||
// Doesn't matter if rustfmt is unavailable.
|
||||
let _ = Command::new("rustfmt").arg(out_path).output();
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
struct Block {
|
||||
name: String,
|
||||
default_state: u16,
|
||||
min_state_id: u16,
|
||||
max_state_id: u16,
|
||||
/// Order of elements in this vec is significant.
|
||||
props: Vec<Prop>,
|
||||
}
|
||||
|
||||
struct Prop {
|
||||
name: String,
|
||||
vals: Vec<String>,
|
||||
}
|
||||
|
||||
fn parse_blocks_json() -> anyhow::Result<Vec<Block>> {
|
||||
#[derive(Clone, PartialEq, Debug, Deserialize)]
|
||||
#[serde(rename_all = "camelCase")]
|
||||
struct JsonBlock {
|
||||
id: u16,
|
||||
name: String,
|
||||
display_name: String,
|
||||
hardness: f64,
|
||||
resistance: f64,
|
||||
stack_size: u32,
|
||||
diggable: bool,
|
||||
material: String,
|
||||
transparent: bool,
|
||||
emit_light: u8,
|
||||
filter_light: u8,
|
||||
default_state: u16,
|
||||
min_state_id: u16,
|
||||
max_state_id: u16,
|
||||
states: Vec<State>,
|
||||
bounding_box: String,
|
||||
}
|
||||
|
||||
#[derive(Clone, PartialEq, Debug, Deserialize)]
|
||||
#[serde(tag = "type", rename_all = "camelCase")]
|
||||
enum State {
|
||||
Enum { name: String, values: Vec<String> },
|
||||
Int { name: String, values: Vec<String> },
|
||||
Bool { name: String },
|
||||
}
|
||||
|
||||
let blocks: Vec<JsonBlock> = serde_json::from_str(include_str!("../data/blocks.json"))?;
|
||||
|
||||
Ok(blocks
|
||||
.into_iter()
|
||||
.map(|b| Block {
|
||||
name: b.name,
|
||||
default_state: b.default_state,
|
||||
min_state_id: b.min_state_id,
|
||||
max_state_id: b.max_state_id,
|
||||
props: b
|
||||
.states
|
||||
.into_iter()
|
||||
.map(|s| Prop {
|
||||
name: match &s {
|
||||
State::Enum { name, .. } => name.clone(),
|
||||
State::Int { name, .. } => name.clone(),
|
||||
State::Bool { name } => name.clone(),
|
||||
},
|
||||
vals: match &s {
|
||||
State::Enum { values, .. } => values.clone(),
|
||||
State::Int { values, .. } => values.clone(),
|
||||
State::Bool { .. } => vec!["false".to_string(), "true".to_string()],
|
||||
},
|
||||
})
|
||||
.collect(),
|
||||
})
|
||||
.collect())
|
||||
}
|
32
build/main.rs
Normal file
32
build/main.rs
Normal file
|
@ -0,0 +1,32 @@
|
|||
use std::fs;
|
||||
|
||||
use anyhow::Context;
|
||||
use proc_macro2::{Ident, Span};
|
||||
|
||||
mod block;
|
||||
|
||||
pub fn main() -> anyhow::Result<()> {
|
||||
// If any of the files in the data directory are modified, rerun the build
|
||||
// script.
|
||||
for entry in fs::read_dir("data")? {
|
||||
let entry = entry?;
|
||||
if entry.metadata()?.is_file() {
|
||||
let buf = entry.path();
|
||||
let path = buf.to_str().context("bad file name")?;
|
||||
println!("cargo:rerun-if-changed={path}");
|
||||
}
|
||||
}
|
||||
|
||||
block::build()?;
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn ident(s: impl AsRef<str>) -> Ident {
|
||||
let s = s.as_ref().trim();
|
||||
if s.starts_with(char::is_numeric) {
|
||||
Ident::new(&format!("_{s}"), Span::call_site())
|
||||
} else {
|
||||
Ident::new(s, Span::call_site())
|
||||
}
|
||||
}
|
32733
data/blocks.json
Normal file
32733
data/blocks.json
Normal file
File diff suppressed because it is too large
Load diff
20
src/block.rs
Normal file
20
src/block.rs
Normal file
|
@ -0,0 +1,20 @@
|
|||
#![allow(clippy::all)]
|
||||
|
||||
include!(concat!(env!("OUT_DIR"), "/block.rs"));
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
|
||||
#[test]
|
||||
fn get_set_consistency() {
|
||||
for typ in BlockType::ALL {
|
||||
let block = typ.to_state();
|
||||
|
||||
for &prop in typ.props() {
|
||||
let new_block = block.set(prop, block.get(prop).unwrap());
|
||||
assert_eq!(new_block, block);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
|
@ -19,6 +19,7 @@ pub mod util;
|
|||
mod var_int;
|
||||
mod var_long;
|
||||
mod world;
|
||||
pub mod block;
|
||||
|
||||
pub use aabb::Aabb;
|
||||
pub use chunk::{Chunk, ChunkPos};
|
||||
|
|
|
@ -1,9 +0,0 @@
|
|||
[package]
|
||||
name = "valence-data"
|
||||
version = "0.1.0"
|
||||
edition = "2021"
|
||||
description = "Generated code for the Valence project."
|
||||
repository = "https://github.com/rj00a/valence"
|
||||
license = "MIT"
|
||||
|
||||
[dependencies]
|
|
@ -1,8 +0,0 @@
|
|||
#[cfg(test)]
|
||||
mod tests {
|
||||
#[test]
|
||||
fn it_works() {
|
||||
let result = 2 + 2;
|
||||
assert_eq!(result, 4);
|
||||
}
|
||||
}
|
Loading…
Reference in a new issue