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2020-10-05lexer: properly handle reserved `if` wordJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-10-02treewide: rework handling of memory allocation failuresJo-Philipp Wich
Instead of propagating failures to the caller, print a generic error message and terminate program execution through abort(). Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-24syntax: add regular expression supportJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-22syntax: introduce case statement supportJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-21syntax: introduce try/catch blocksJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-11syntax: introduce !== and === operatorsJo-Philipp Wich
Also treat "in" as relational operator. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-10treewide: implement default lstrip_blocks and trim_blocks behaviourJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-07ast, eval, lexer: keep track of overflows when parsing numbersJo-Philipp Wich
This allows number literals that exceed the range INT64_MIN..INT64_MAX to be truncated to the respective min and max values in a defined manner. It also makes it possible to have the expression `{{ -9223372036854775808 }}` actually result in `-9223372036854775808`. Since negation and number declaration are separate operations, the value would be first truncated to `9223372036854775807` and then negated, making it impossible to write a literal INT64_MIN value without tracking the overflow. Also fix the number parsing logic to not trucate intergers to 32bit. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-07lexer: fix encoding of unicode surrogate pairsJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-06treewide: refactor internal AST structuresJo-Philipp Wich
- unify operand and value tag structures - use a contiguous array for storing opcodes - use relative offsets for next and children ops - defer function creation to runtime - rework "this" context handling by storing context pointer in scope tags Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-02treewide: rename double and null value constructor functionsJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-08-25treewide: add proper null value handlingJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-08-25treewide: introduce this keywordJo-Philipp Wich
Support a new keyword `this` which allows functions to access the context they're called upon. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-08-25lexer.c, eval.c: move T_EXCEPTION definition to lexer headerJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-08-21Initial commitJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
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