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|
use crate::*;
/// The entire semantic program, ready to generate bytecode.
pub struct Program {
pub definitions: Vec<Definition>,
pub invocations: Vec<Invocation>,
pub errors: Vec<ParseError>,
}
/// A symbol definition.
pub struct Definition {
pub name: String,
pub source: SourceSpan,
pub arguments: Vec<ArgumentDefinition>,
pub variant: DefinitionVariant,
}
pub struct ArgumentDefinition {
pub name: String,
pub source: SourceSpan,
pub variant: ArgumentDefinitionVariant,
}
pub enum ArgumentDefinitionVariant {
Integer,
Block,
}
pub enum DefinitionVariant {
Integer(IntegerDefinition),
Block(BlockDefinition),
Reference(ReferenceDefinition),
}
pub struct IntegerDefinition {
pub source: SourceSpan,
pub variant: IntegerDefinitionVariant,
}
pub enum IntegerDefinitionVariant {
Literal(usize),
Constant(ConstantExpression),
}
pub struct BlockDefinition {
pub tokens: Vec<BlockToken>,
pub errors: Vec<ParseError>,
}
pub struct BlockToken {
pub source: SourceSpan,
pub variant: BlockTokenVariant,
}
pub enum BlockTokenVariant {
Invocation(Invocation),
Comment(String),
Word(PackedBinaryLiteral),
}
/// References aren't necessarily an integer or a block
pub struct ReferenceDefinition {
pub source: SourceSpan,
pub name: String,
}
pub struct Invocation {
pub name: String,
pub arguments: Vec<DefinitionVariant>,
pub errors: Vec<ParseError>,
}
pub struct ParseError {
pub source: SourceSpan,
pub variant: ParseErrorVariant,
}
pub enum ParseErrorVariant {
UnterminatedMacroDefinition(String),
UnterminatedBlockDefinition,
/// Name of the macro.
InvalidArgumentDefinition(String),
InvalidToken,
}
// ------------------------------------------------------------------------ //
macro_rules! indent {
($indent:expr => $($tokens:tt)*) => {{
for _ in 0..$indent { print!(" "); }
println!($($tokens)*);
}};
}
impl Program {
pub fn print_definitions(&self) {
for definition in &self.definitions {
let variant = match &definition.variant {
DefinitionVariant::Integer(_) => "INTEGER",
DefinitionVariant::Block(_) => "BLOCK",
DefinitionVariant::Reference(_) => "REFERENCE",
};
println!("DEFINE {variant} '{}'", definition.name);
for argument in &definition.arguments {
self.print_argument_definition(argument);
}
match &definition.variant {
DefinitionVariant::Integer(integer) =>
self.print_integer_definition(1, integer),
DefinitionVariant::Block(block) =>
self.print_block_definition(1, block),
DefinitionVariant::Reference(reference) =>
indent!(1 => "REFERENCE '{}'", reference.name),
};
println!();
}
for invocation in &self.invocations {
self.print_invocation(0, invocation);
}
}
fn print_argument_definition(&self, argument: &ArgumentDefinition) {
let variant = match argument.variant {
ArgumentDefinitionVariant::Integer => "INTEGER",
ArgumentDefinitionVariant::Block => "BLOCK",
};
println!(" ARGUMENT {variant} '{}'", argument.name);
}
fn print_integer_definition(&self, indent: usize, definition: &IntegerDefinition) {
match &definition.variant {
IntegerDefinitionVariant::Literal(value) =>
indent!(indent => "LITERAL {value}"),
IntegerDefinitionVariant::Constant(expr) =>
indent!(indent => "CONSTANT [{expr:?}]"),
}
}
fn print_block_definition(&self, indent: usize, definition: &BlockDefinition) {
indent!(indent => "BLOCK");
let indent = indent + 1;
for token in &definition.tokens {
match &token.variant {
BlockTokenVariant::Invocation(invocation) =>
self.print_invocation(indent, invocation),
BlockTokenVariant::Comment(_) =>
indent!(indent => "COMMENT"),
BlockTokenVariant::Word(word) =>
indent!(indent => "WORD #{word}"),
}
}
}
fn print_invocation(&self, indent: usize, invocation: &Invocation) {
indent!(indent => "INVOCATION '{}'", invocation.name);
let indent = indent + 1;
for argument in &invocation.arguments {
match &argument {
DefinitionVariant::Integer(integer) =>
self.print_integer_definition(indent, integer),
DefinitionVariant::Block(block) =>
self.print_block_definition(indent, block),
DefinitionVariant::Reference(reference) =>
indent!(indent => "REFERENCE '{}'", reference.name),
};
}
}
}
|
